app/src/main/java/org/foxarmy/barcodescannerforemployees/LoadingDialog.kt

@@ -1,14 +0,0 @@
-package org.foxarmy.barcodescannerforemployees
-
-import android.app.Dialog
-import android.os.Bundle
-import androidx.fragment.app.DialogFragment
-
-class LoadingDialog : DialogFragment() {
-    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
-
-
-
-        return super.onCreateDialog(savedInstanceState)
-    }
-}

app/src/main/java/org/foxarmy/barcodescannerforemployees/Net.kt

@@ -1,9 +1,6 @@
 package org.foxarmy.barcodescannerforemployees
 
 import android.content.Context
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
 import okhttp3.*
 import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
@@ -14,19 +11,19 @@ import org.foxarmy.barcodescannerforemployees.dataclasses.Product
 import java.io.File
 import java.io.FileOutputStream
 import java.io.IOException
-import java.util.concurrent.TimeUnit
+import kotlin.concurrent.thread
 
 class Net {
     var language = "en-US"
     var server = "bsfe.foxarmy.org"
     var token = ""
 
-    fun serverIsAvailable(context: Context, callback: (Boolean) -> Unit) {
+    fun serverIsAvailable(context: Context): Boolean {
         if (!isInternetConnectionAvailable(context)) {
-            callback(false)
+            return false
         }
-        CoroutineScope(Dispatchers.IO).launch {
         var flag = false
+        thread {
             val client = OkHttpClient();
             val request = Request.Builder()
                 .url("https://$server/status")
@@ -39,13 +36,13 @@ class Net {
             } catch (e: Exception) {
                 flag = false;
             }
-            callback(flag)
+        }.join()
-        }
+        return flag
     }
 
-    fun requestProductFromOnlineDB(barcode: String, callback: (Response) -> Unit) {
+    fun requestProductFromOnlineDB(barcode: String): String {
-        CoroutineScope(Dispatchers.IO).launch {
+        var response = ""
-            lateinit var response: Response
+        thread {
             val url = "https://ean-online.ru/match.php"
 
             val client = OkHttpClient()
@@ -61,15 +58,19 @@ class Net {
                 .addHeader("accept-language", language)
                 .build()
 
-            response = client.newCall(request).execute()
+            response = client.newCall(request).execute().body!!.string()
-            callback(response)
+        }.join()
+
+        return if (response == "") {
+            "Not found 404"
+        } else {
+            response
         }
     }
 
-    fun registerAccount(username: String, password: String, callback: (Response) -> Unit) {
+    fun registerAccount(username: String, password: String): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
-
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -85,13 +86,14 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun login(username: String, password: String, callback: (Response) -> Unit) {
+    fun login(username: String, password: String): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -105,19 +107,15 @@ class Net {
                 .addHeader("accept-language", language)
                 .build()
             response = client.newCall(requestLogin).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun uploadAbstractProduct(
+    fun uploadAbstractProduct(groupId: Int, abstractProduct: AbstractProduct, imageFile: File): Response {
-        groupId: Int,
-        abstractProduct: AbstractProduct,
-        imageFile: File,
-        callback: (Response) -> Unit,
-    ) {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val body = MultipartBody.Builder()
@@ -140,14 +138,16 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun changeUsername(newUsername: String, callback: (Response) -> Unit) {
+    fun changeUsername(newUsername: String): Response {
-        CoroutineScope(Dispatchers.IO).launch {
+
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -162,14 +162,16 @@ class Net {
                 .addHeader("accept-language", language)
                 .build()
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun changePassword(newPassword: String, callback: (Response) -> Unit) {
+    fun changePassword(newPassword: String): Response {
-        CoroutineScope(Dispatchers.IO).launch {
+
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -184,12 +186,15 @@ class Net {
                 .addHeader("accept-language", language)
                 .build()
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun createGroup(name: String, password: String, callback: (Response) -> Unit) {
+    fun createGroup(name: String, password: String): Response {
-        CoroutineScope(Dispatchers.IO).launch {
+        lateinit var response: Response
+
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -202,19 +207,19 @@ class Net {
                 .addHeader("Authorization", "Bearer $token")
                 .addHeader("accept-language", language)
                 .build()
-            val response = client.newCall(request).execute()
+            response = client.newCall(request).execute()
+        }.join()
 
-            changeGroupPassword(name, password, { responseFromPassword ->
-                callback(response)
-            })
 
-        }
+        changeGroupPassword(name, password)
+
+        return response
     }
 
-    fun joinGroup(id: Int, password: String, callback: (Response) -> Unit) {
+    fun joinGroup(id: Int, password: String): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -228,15 +233,18 @@ class Net {
                 .addHeader("accept-language", language)
                 .build()
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun changeGroupPassword(name: String, password: String, callback: (Response) -> Unit) {
+    fun changeGroupPassword(name: String, password: String): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
-            getGroupId(name, { groupId ->
+        thread {
+
+            val groupId = getGroupId(name);
+
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -251,15 +259,15 @@ class Net {
                 .addHeader("accept-language", language)
                 .build()
             response = client.newCall(request).execute()
-                callback(response)
+        }.join()
-            });
+
-        }
+        return response
     }
 
-    fun getGroupId(name: String, callback: (String) -> Unit) {
+    fun getGroupId(name: String): String {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -269,14 +277,17 @@ class Net {
                 .addHeader("accept-language", language)
                 .build()
             response = client.newCall(request).execute()
-            callback(response.body!!.string())
+        }.join()
-        }
+
+        val responseText = response.body!!.string()
+
+        return responseText
     }
 
-    fun getGroupName(id: Int, callback: (String) -> Unit) {
+    fun getGroupName(id: Int): String {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -286,14 +297,17 @@ class Net {
                 .addHeader("accept-language", language)
                 .build()
             response = client.newCall(request).execute()
-            callback(response.body!!.string())
+        }.join()
-        }
+
+        val responseText = response.body!!.string()
+
+        return responseText
     }
 
-    fun getUsersInGroup(groupId: Int, callback: (Response) -> Unit) {
+    fun getUsersInGroup(groupId: Int): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -304,14 +318,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun getMyGroups(callback: (Response) -> Unit) {
+    fun getMyGroups(): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -322,14 +337,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun getUsernameById(userId: Int, callback: (Response) -> Unit) {
+    fun getUsernameById(userId: Int): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -340,14 +356,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun getGroupAdminId(groupId: Int, callback: (Response) -> Unit) {
+    fun getGroupAdminId(groupId: Int): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -358,19 +375,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun updateAbstractProduct(
+    fun updateAbstractProduct(groupId: Int, abstractProduct: AbstractProduct, imageFile: File): Response {
-        groupId: Int,
-        abstractProduct: AbstractProduct,
-        imageFile: File,
-        callback: (Response) -> Unit,
-    ) {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val body = MultipartBody.Builder()
@@ -393,14 +406,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun uploadCategory(groupId: Int, category: Category, callback: (Response) -> Unit) {
+    fun uploadCategory(groupId: Int, category: Category): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -417,14 +431,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun updateCategory(groupId: Int, category: Category, callback: (Response) -> Unit) {
+    fun updateCategory(groupId: Int, category: Category): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -441,14 +456,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun uploadProduct(groupId: Int, product: Product, callback: (Response) -> Unit) {
+    fun uploadProduct(groupId: Int, product: Product): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -468,14 +484,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun updateProduct(groupId: Int, product: Product, callback: (Response) -> Unit) {
+    fun updateProduct(groupId: Int, product: Product): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val body = FormBody.Builder()
@@ -495,14 +512,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun synchronize(groupId: Int, callback: (Response) -> Unit) {
+    fun synchronize(groupId: Int): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -513,24 +531,59 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun downloadImage(url: String, file: File, callback: () -> Unit) {
+    fun getProduct(groupId: Int, localId: Int): Response {
-        CoroutineScope(Dispatchers.IO).launch {
+        lateinit var response: Response
-            val client = OkHttpClient.Builder()
+
-                .connectTimeout(30, TimeUnit.SECONDS)
+        thread {
-                .readTimeout(10, TimeUnit.MINUTES)
+            val client = OkHttpClient()
+
+            val request = Request.Builder()
+                .url("https://$server/api/product/$groupId/$localId")
+                .get()
+                .addHeader("Authorization", "Bearer $token")
+                .addHeader("accept-language", language)
                 .build()
 
+            response = client.newCall(request).execute()
+        }.join()
+
+        return response
+    }
+
+    fun getAbstractProduct(groupId: Int, localId: Int): Response {
+        lateinit var response: Response
+
+        thread {
+            val client = OkHttpClient()
+
+            val request = Request.Builder()
+                .url("https://$server/api/abstractproduct/$groupId/$localId")
+                .get()
+                .addHeader("Authorization", "Bearer $token")
+                .addHeader("accept-language", language)
+                .build()
+
+            response = client.newCall(request).execute()
+        }.join()
+
+        return response
+    }
+
+    fun downloadImage(url: String, file: File) {
+        thread {
+            val client = OkHttpClient()
             val request = Request.Builder()
                 .url(url)
                 .addHeader("Authorization", "Bearer $token")
                 .addHeader("accept-language", language)
                 .build()
 
-            val response = client.newCall(request).execute()
+            client.newCall(request).execute().use { response ->
                 if (!response.isSuccessful) throw IOException("Unexpected code $response")
 
                 val fos = FileOutputStream(file)
@@ -540,14 +593,14 @@ class Net {
                         inputStream.copyTo(fos)
                     }
                 }
-            callback()
             }
+        }.join()
     }
 
-    fun deleteCategory(groupId: Int, localId: Int, callback: (Response) -> Unit) {
+    fun deleteCategory(groupId: Int, localId: Int): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -558,14 +611,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun deleteAbstractProduct(groupId: Int, localId: Int, callback: (Response) -> Unit) {
+    fun deleteAbstractProduct(groupId: Int, localId: Int): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -576,14 +630,15 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
+
+        return response
     }
 
-    fun deleteProduct(groupId: Int, localId: Int, callback: (Response) -> Unit) {
+    fun deleteProduct(groupId: Int, localId: Int): Response {
-        CoroutineScope(Dispatchers.IO).launch {
         lateinit var response: Response
 
+        thread {
             val client = OkHttpClient()
 
             val request = Request.Builder()
@@ -594,69 +649,8 @@ class Net {
                 .build()
 
             response = client.newCall(request).execute()
-            callback(response)
+        }.join()
-        }
-    }
 
-    fun renameGroup(groupId: Int, newName: String, callback: (Response) -> Unit) {
+        return response
-        CoroutineScope(Dispatchers.IO).launch {
-            lateinit var response: Response
-
-            val client = OkHttpClient()
-
-            val body = FormBody.Builder()
-                .add("name", newName)
-                .build()
-
-            val request = Request.Builder()
-                .url("https://$server/api/group/rename/$groupId")
-                .post(body)
-                .addHeader("Authorization", "Bearer $token")
-                .addHeader("accept-language", language)
-                .build()
-
-            response = client.newCall(request).execute()
-            callback(response)
-        }
-    }
-
-    fun transfer_ownership(groupId: Int, userId: Int, callback: (Response) -> Unit) {
-        CoroutineScope(Dispatchers.IO).launch {
-            lateinit var response: Response
-
-            val client = OkHttpClient()
-
-            val body = FormBody.Builder()
-                .add("userId", userId.toString())
-                .build()
-
-            val request = Request.Builder()
-                .url("https://$server/api/group/transferOwnership/$groupId")
-                .post(body)
-                .addHeader("Authorization", "Bearer $token")
-                .addHeader("accept-language", language)
-                .build()
-
-            response = client.newCall(request).execute()
-            callback(response)
-        }
-    }
-
-    fun leaveGroup(groupId: Int, callback: (Response) -> Unit) {
-        CoroutineScope(Dispatchers.IO).launch {
-            lateinit var response: Response
-
-            val client = OkHttpClient()
-
-            val request = Request.Builder()
-                .url("https://$server/api/group/leave/$groupId")
-                .get()
-                .addHeader("Authorization", "Bearer $token")
-                .addHeader("accept-language", language)
-                .build()
-
-            response = client.newCall(request).execute()
-            callback(response)
-        }
     }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/Parser.kt

@@ -14,6 +14,8 @@ class Parser constructor() {
                 text = text.replace(found, "")
                 netWeight = stripNetWeight(found)
                 return Triple(text, netWeight, found)
+            } else {
+                return Triple(text, 0.0, "")
             }
         }
         return Triple("", 0.0, "")

app/src/main/java/org/foxarmy/barcodescannerforemployees/Utils.kt

@@ -3,8 +3,6 @@ package org.foxarmy.barcodescannerforemployees
 import android.app.Activity
 import android.content.Context
 import android.content.ContextWrapper
-import android.content.Intent
-import android.content.SharedPreferences
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
 import android.graphics.Matrix
@@ -19,7 +17,6 @@ import androidx.core.content.FileProvider
 import androidx.security.crypto.EncryptedSharedPreferences
 import androidx.security.crypto.MasterKeys
 import com.google.firebase.components.BuildConfig
-import org.foxarmy.barcodescannerforemployees.activities.LoginActivity
 import java.io.File
 import java.io.FileInputStream
 import java.io.FileOutputStream
@@ -117,28 +114,36 @@ fun calculateProductFreshness(dateOfProduction: Long, dateOfExpiry: Long): Doubl
 
 fun getUnitNameById(context: Context, id: Int): String {
     return when (id) {
-        0 -> { context.getString(R.string.kilogram) }
+        0 -> {
+            context.getString(R.string.kilogram)
+        }
 
-        1 -> { context.getString(R.string.gram) }
+        1 -> {
+            context.getString(R.string.gram)
+        }
 
-        2 -> { context.getString(R.string.liter) }
+        2 -> {
+            context.getString(R.string.liter)
+        }
 
-        3 -> { context.getString(R.string.milliliter) }
+        3 -> {
+            context.getString(R.string.milliliter)
+        }
 
-        4 -> { context.getString(R.string.pieces) }
+        4 -> {
+            context.getString(R.string.pieces)
+        }
 
-        else -> { "" }
+        else -> {
+            ""
+        }
     }
 }
 
-fun parseIntArray(input: String): IntArray {
+fun parseArray(input: String): IntArray {
     return input.trim('[', ']').split(",").map { it.trim().toInt() }.toIntArray()
 }
 
-fun parseStringList(input: String): List<String> {
-    return input.trim('[', ']').split(",").map { it.trim() }.toList()
-}
-
 fun calculateMd5Hash(file: File): String {
     val digest = MessageDigest.getInstance("MD5")
     val fis = FileInputStream(file)
@@ -188,30 +193,23 @@ fun noInternetConnectionAvailableNotification(context: Context) {
     (context as Activity).runOnUiThread {
         AlertDialog.Builder(context)
             .setMessage(context.getString(R.string.no_internet_connection))
-            .setCancelable(false)
             .setPositiveButton(R.string.quit) { _, _ ->
                 exitProcess(0)
             }
             .setNeutralButton(R.string.logout) { _, _ ->
-                val sharedPreferences = getPreferences(context)
+                val sharedPreferences = EncryptedSharedPreferences.create(
-
-                sharedPreferences.edit().putString("token", "").apply()
-                sharedPreferences.edit().putString("server", "").apply()
-                sharedPreferences.edit().putStringSet("groups", emptySet()).apply()
-                sharedPreferences.edit().putString("currentGroup", "").apply()
-                val intent = Intent(context, LoginActivity::class.java)
-                context.startActivity(intent)
-                context.finish()
-            }.show()
-    }
-}
-
-fun getPreferences(context: Context): SharedPreferences {
-    return EncryptedSharedPreferences.create(
                     "sensitive",
                     MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
                     context,
                     EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
                     EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
                 )
+
+                sharedPreferences.edit().putString("token", "").apply()
+                sharedPreferences.edit().putString("server", "").apply()
+                sharedPreferences.edit().putStringSet("groups", emptySet()).apply()
+                sharedPreferences.edit().putString("currentGroup", "").apply()
+                exitProcess(0)
+            }.show()
+    }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/WebSocketClient.kt

@@ -20,13 +20,8 @@ import java.util.concurrent.TimeUnit
 class WebSocketClient(private val context: Context, private val server: String) {
 
     private lateinit var webSocket: WebSocket
-    private lateinit var token: String
-    private lateinit var currentGroup: String
 
     fun connect(token: String, currentGroup: String) {
-        this.token = token
-        this.currentGroup = currentGroup
-
         val client = OkHttpClient.Builder()
             .connectTimeout(5, TimeUnit.SECONDS)
             .readTimeout(1, TimeUnit.MINUTES)
@@ -75,22 +70,19 @@ class WebSocketClient(private val context: Context, private val server: String)
                                 val pictureFile =
                                     File(picturesDir, "${data["image_filename"]}.png")
                                 val url = "https://${net.server}/api/abstractproduct/getImage/${currentGroup}/${data["local_id"]}"
-                                net.downloadImage(url, pictureFile, {
+                                net.downloadImage(url, pictureFile)
+
                                 abstractProductDAO.addAbstractProduct(newAbstractProduct)
-                                    (context as MainActivity).updateAll()
-                                })
                             }
 
                             "product" -> {
                                 val newProduct = Product.createFromJSON(data)
                                 productDAO.insertNewProduct(newProduct)
-                                (context as MainActivity).updateAll()
                             }
 
                             "category" -> {
                                 val newCategory = Category.createFromJSON(data)
                                 categoryDAO.addCategory(newCategory)
-                                (context as MainActivity).updateAll()
                             }
                         }
                     }
@@ -110,21 +102,17 @@ class WebSocketClient(private val context: Context, private val server: String)
                                 val pictureFile =
                                     File(picturesDir, "${data["image_filename"]}.png")
                                 val url = "https://${net.server}/api/abstractproduct/getImage/${currentGroup}/${data["local_id"]}"
-                                net.downloadImage(url, pictureFile, {
+                                net.downloadImage(url, pictureFile)
-                                    abstractProductDAO.updateAbstractProduct(updatedAbstractProduct)
-                                    (context as MainActivity).updateAll()
-                                })
 
+                                abstractProductDAO.updateAbstractProduct(updatedAbstractProduct)
                             }
                             "product" -> {
                                 val updatedProduct = Product.createFromJSON(data)
                                 productDAO.updateProduct(updatedProduct)
-                                (context as MainActivity).updateAll()
                             }
                             "category" -> {
                                 val updatedCategory = Category.createFromJSON(data)
                                 categoryDAO.updateCategory(updatedCategory)
-                                (context as MainActivity).updateAll()
                             }
                         }
                     }
@@ -135,25 +123,23 @@ class WebSocketClient(private val context: Context, private val server: String)
                         when(item) {
                             "abstractproduct" -> {
                                 abstractProductDAO.eraseAbstractProduct(id.toInt(), context)
-                                (context as MainActivity).updateAll()
                             }
                             "product" -> {
                                 productDAO.eraseProduct(id.toInt())
-                                (context as MainActivity).updateAll()
                             }
                             "category" -> {
                                 categoryDAO.eraseCategory(id.toInt(), context)
-                                (context as MainActivity).updateAll()
-                            }
                             }
                         }
                     }
                 }
 
+                (context as MainActivity).updateAll()
+            }
+
             override fun onClosing(webSocket: WebSocket, code: Int, reason: String) {
                 Log.d("QWERTYUIOP", "Closing ws. Reason: $reason")
-//                noInternetConnectionAvailableNotification(context)
+                noInternetConnectionAvailableNotification(context)
-                this@WebSocketClient.connect(token, currentGroup)
             }
 
             override fun onFailure(webSocket: WebSocket, t: Throwable, response: Response?) {

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AccountSettingsActivity.kt

@@ -1,11 +1,11 @@
 package org.foxarmy.barcodescannerforemployees.activities
 
-import android.content.Intent
 import android.os.Bundle
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
-import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.databinding.ActivityAccountSettingsBinding
 
 class AccountSettingsActivity : AppCompatActivity() {
@@ -19,7 +19,15 @@ class AccountSettingsActivity : AppCompatActivity() {
 
         setContentView(binding.root)
 
-        val sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+        val masterKeyAlias = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC)
+
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            masterKeyAlias,
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val net = Net()
 
@@ -28,39 +36,13 @@ class AccountSettingsActivity : AppCompatActivity() {
         net.token = sharedPreferences.getString("token", "")!!
 
         binding.saveUsernameButton.setOnClickListener {
-            net.changeUsername(binding.newUsernameTextEdit.text.toString(), { response ->
+            val response = net.changeUsername(binding.newUsernameTextEdit.text.toString())
-                if (response.code == 200) {
-                    runOnUiThread {
-                        Toast.makeText(this, getString(R.string.username_changed), Toast.LENGTH_LONG).show()
-                        val intent = Intent(this, LoginActivity::class.java)
-                        startActivity(intent)
-                        finish()
-                    }
-                } else {
-                    runOnUiThread {
             Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
         }
-                }
-            })
-
-        }
 
         binding.savePasswordButton.setOnClickListener {
-            net.changePassword(binding.newPasswordTextEdit.text.toString(), { response ->
+            val response = net.changePassword(binding.newPasswordTextEdit.text.toString())
-                if (response.code == 200) {
-                    runOnUiThread {
-                        Toast.makeText(this, getString(R.string.password_changed), Toast.LENGTH_LONG).show()
-                        val intent = Intent(this, LoginActivity::class.java)
-                        startActivity(intent)
-                        finish()
-                    }
-                } else {
-                    runOnUiThread {
             Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
         }
     }
-            })
-
-        }
-    }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AddAbstractProductActivity.kt

@@ -1,6 +1,5 @@
 package org.foxarmy.barcodescannerforemployees.activities
 
-import android.app.ProgressDialog
 import android.content.DialogInterface
 import android.content.Intent
 import android.content.SharedPreferences
@@ -18,6 +17,8 @@ import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.widget.addTextChangedListener
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import com.journeyapps.barcodescanner.ScanContract
 import com.journeyapps.barcodescanner.ScanIntentResult
 import com.journeyapps.barcodescanner.ScanOptions
@@ -31,6 +32,7 @@ import java.io.File
 import java.io.FileOutputStream
 import java.nio.file.Files
 import java.nio.file.StandardCopyOption
+import kotlin.concurrent.thread
 
 class AddAbstractProductActivity : AppCompatActivity() {
     private lateinit var imageView: ImageView
@@ -58,19 +60,18 @@ class AddAbstractProductActivity : AppCompatActivity() {
     private lateinit var DAO: AbstractProductDAO
     private lateinit var sharedPreferences: SharedPreferences
 
-    private lateinit var loadingDialog: ProgressDialog
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         setContentView(R.layout.fragment_add_abstract_product)
 
-        loadingDialog = ProgressDialog(this)
+        sharedPreferences = EncryptedSharedPreferences.create(
-        loadingDialog.setMessage(getString(R.string.loading_please_wait))
+            "sensitive",
-        loadingDialog.setCancelable(false)
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
-        loadingDialog.setTitle(getString(R.string.loading))
+            applicationContext,
-
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
-        sharedPreferences = getPreferences(this)
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(this, sharedPreferences.getString("currentGroup", "offline")!!)
         DAO = AbstractProductDAO(dbHelper)
@@ -127,9 +128,6 @@ class AddAbstractProductActivity : AppCompatActivity() {
             netWeightText.text = abstractProduct!!.netWeight.toString()
             categorySpinner.setSelection(abstractProduct!!.category - 1)
             unitTypeSpinner.setSelection(abstractProduct!!.unit)
-            if (abstractProduct!!.barcode == "" || abstractProduct!!.barcode == "             ") {
-                noBarcodeCheckBox.isChecked = true
-            }
         }
 
         saveButton.setOnClickListener {
@@ -154,26 +152,18 @@ class AddAbstractProductActivity : AppCompatActivity() {
                 return@setOnClickListener
             }
 
-            loadingDialog.show()
-
-            val currentGroup: Int
-            val currentGroupString = sharedPreferences.getString("currentGroup", "offline")!!
-
             val net = Net()
 
-            if (currentGroupString != "offline") {
-                currentGroup = currentGroupString.toInt()
-
             net.token = sharedPreferences.getString("token", "")!!
             net.server = sharedPreferences.getString("server", "")!!
             net.language = sharedPreferences.getString("language", "en-US")!!
 
-            } else {
+            val currentGroup: Int = if (sharedPreferences.getString("currentGroup", "offline")!! == "offline") 0 else sharedPreferences.getString("currentGroup", "")!!.toInt()
-                currentGroup = 0
+
-            }
+            lateinit var response: Response
 
             abstractProduct = AbstractProduct(
-                if (abstractProduct == null) 0 else abstractProduct!!.id,
+                if(abstractProduct == null) 0 else abstractProduct!!.id,
                 if (noBarcodeCheckBox.isChecked) "" else barcode,
                 productName,
                 netWeight.toString().toDouble(),
@@ -181,17 +171,18 @@ class AddAbstractProductActivity : AppCompatActivity() {
                 categorySpinner.selectedItemPosition + 1,
                 unitTypeSpinner.selectedItemPosition
             )
-
             val pictureFile = File(File(filesDir, "pictures"), "${abstractProduct!!.imageHash}.png")
 
             if (action == "update") {
                 DAO.updateAbstractProduct(abstractProduct!!)
-                if (currentGroup > 0) net.updateAbstractProduct(currentGroup, abstractProduct!!, pictureFile, this::notifyUserAndExit)
+                response = net.updateAbstractProduct(currentGroup, abstractProduct!!, pictureFile)
             } else if (action == "new" || action == "new_from_barcode") {
                 abstractProduct!!.id = DAO.addAbstractProduct(abstractProduct!!).toInt()
-                if (currentGroup > 0)
+                response = net.uploadAbstractProduct(currentGroup, abstractProduct!!, pictureFile);
-                    net.uploadAbstractProduct(currentGroup, abstractProduct!!, pictureFile, this::notifyUserAndExit)
             }
+            Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
+
+            finish()
         }
 
         takePictureButton.setOnClickListener {
@@ -204,16 +195,10 @@ class AddAbstractProductActivity : AppCompatActivity() {
         }
     }
 
-    fun notifyUserAndExit(response: Response) {
-        runOnUiThread {
-            Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
-            loadingDialog.dismiss()
-            finish()
-        }
-    }
-
     fun performRequest(barcode: String) {
         barcodeText.setText(this.barcode)
+        val net = Net();
+        val result = net.requestProductFromOnlineDB(barcode)
 
         var abstractProduct: AbstractProduct
 
@@ -235,25 +220,24 @@ class AddAbstractProductActivity : AppCompatActivity() {
                 }.show()
         }
 
-        val net = Net();
+        thread {
-        net.requestProductFromOnlineDB(barcode, {response ->
+            if (result == "Not found 404") {
-            if (response.code == 404) {
                 runOnUiThread {
                     Toast.makeText(this, getString(R.string.no_product_in_online_database), Toast.LENGTH_LONG)
                         .show()
                     productNameText.setText("")
                     netWeightText.setText("")
                 }
-                return@requestProductFromOnlineDB
+                return@thread
             }
 
-            abstractProduct = Parser().parse(response.body!!.string())
+            abstractProduct = Parser().parse(result)
             runOnUiThread {
                 productNameText.text = abstractProduct.name
                 netWeightText.text = abstractProduct.netWeight.toString()
                 unitTypeSpinner.setSelection(abstractProduct.unit)
             }
-        })
+        }
     }
 
     private fun fillupUnitsSpinner() {
@@ -273,8 +257,7 @@ class AddAbstractProductActivity : AppCompatActivity() {
 
     fun fillupCategorySpinner() {
 
-        val categoriesDAO =
+        val categoriesDAO = CategoryDAO(DBStorageController(this, sharedPreferences.getString("currentGroup", "database")!!))
-            CategoryDAO(DBStorageController(this, sharedPreferences.getString("currentGroup", "database")!!))
 
         val categories = categoriesDAO.getAllCategories().map { category -> category.name }
 
@@ -297,7 +280,7 @@ class AddAbstractProductActivity : AppCompatActivity() {
             val orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL)
             val matrix = Matrix()
 
-            when (orientation) {
+            when(orientation){
                 ExifInterface.ORIENTATION_ROTATE_90 -> matrix.postRotate(90F)
                 ExifInterface.ORIENTATION_ROTATE_180 -> matrix.postRotate(180F)
                 ExifInterface.ORIENTATION_ROTATE_270 -> matrix.postRotate(270F)

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AddCategoryActivity.kt

@@ -1,13 +1,13 @@
 package org.foxarmy.barcodescannerforemployees.activities
 
 import android.app.Activity
-import android.app.ProgressDialog
 import android.content.SharedPreferences
 import android.os.Bundle
 import android.widget.Button
 import android.widget.EditText
 import android.widget.Toast
-import okhttp3.Response
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.database.CategoryDAO
@@ -18,19 +18,19 @@ class AddCategoryActivity : Activity() {
 
     private lateinit var DAO: CategoryDAO
     private lateinit var sharedPreferences: SharedPreferences
-    private lateinit var loadingDialog: ProgressDialog
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         setContentView(R.layout.activity_add_category)
 
-        loadingDialog = ProgressDialog(this)
+        sharedPreferences = EncryptedSharedPreferences.create(
-        loadingDialog.setMessage(getString(R.string.loading_please_wait))
+            "sensitive",
-        loadingDialog.setCancelable(false)
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
-        loadingDialog.setTitle(getString(R.string.loading))
+            applicationContext,
-
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
-        sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(this, sharedPreferences.getString("currentGroup", "offline")!!)
         DAO = CategoryDAO(dbHelper)
@@ -48,35 +48,25 @@ class AddCategoryActivity : Activity() {
         net.server = sharedPreferences.getString("server", "")!!
         net.language = sharedPreferences.getString("language", "")!!
 
-        val currentGroup: Int = if (sharedPreferences.getString(
+        val currentGroup: Int = if (sharedPreferences.getString("currentGroup", "offline")!! == "offline") 0 else sharedPreferences.getString("currentGroup", "")!!.toInt()
-                "currentGroup",
-                "offline"
-            )!! == "offline"
-        ) 0 else sharedPreferences.getString("currentGroup", "")!!.toInt()
 
         findViewById<Button>(R.id.saveButton).setOnClickListener {
             if (categoryNameTextEdit.text.toString() == "") {
                 Toast.makeText(this, getString(R.string.category_name_required), Toast.LENGTH_SHORT).show()
                 return@setOnClickListener
             }
-            loadingDialog.show()
 
             if (category.id == 0) { // Inserting new category
                 val newCategory = Category(0, categoryNameTextEdit.text.toString())
                 newCategory.id = DAO.addCategory(newCategory).toInt()
-                if (currentGroup > 0) net.uploadCategory(currentGroup, newCategory, this::notifyUserAndExit)
+                if (currentGroup > 0) net.uploadCategory(currentGroup, newCategory)
             } else { // Updating existing category
                 category.name = categoryNameTextEdit.text.toString()
                 DAO.updateCategory(category)
-                if (currentGroup > 0) net.updateCategory(currentGroup, category, this::notifyUserAndExit)
+                if (currentGroup > 0) net.updateCategory(currentGroup, category)
             }
-        }
+
-    }
-    fun notifyUserAndExit(response: Response) {
-        runOnUiThread {
-            Toast.makeText(this, response.body!!.string(), Toast.LENGTH_SHORT).show()
-        }
-        loadingDialog.dismiss()
             finish()
         }
+    }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/AddProductActivity.kt

@@ -1,7 +1,6 @@
 package org.foxarmy.barcodescannerforemployees.activities
 
 import android.app.Activity
-import android.app.ProgressDialog
 import android.content.Intent
 import android.content.SharedPreferences
 import android.os.Build
@@ -14,6 +13,8 @@ import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.widget.addTextChangedListener
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import com.journeyapps.barcodescanner.ScanContract
 import com.journeyapps.barcodescanner.ScanIntentResult
 import com.journeyapps.barcodescanner.ScanOptions
@@ -55,19 +56,18 @@ class AddProductActivity : AppCompatActivity() {
     private lateinit var abstractProductDAO: AbstractProductDAO
     private lateinit var sharedPreferences: SharedPreferences
 
-    private lateinit var loadingDialog: ProgressDialog
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         setContentView(R.layout.fragment_add_product)
 
-        loadingDialog = ProgressDialog(this)
+        sharedPreferences = EncryptedSharedPreferences.create(
-        loadingDialog.setMessage(getString(R.string.loading_please_wait))
+            "sensitive",
-        loadingDialog.setCancelable(false)
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
-        loadingDialog.setTitle(getString(R.string.loading))
+            applicationContext,
-
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
-        sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(this, sharedPreferences.getString("currentGroup", "offline")!!)
         productDAO = ProductDAO(dbHelper)
@@ -177,17 +177,23 @@ class AddProductActivity : AppCompatActivity() {
                 return@setOnClickListener
             }
 
-            loadingDialog.show()
-
             val currentGroup: Int = if (sharedPreferences.getString("currentGroup", "offline")!! == "offline") 0 else sharedPreferences.getString("currentGroup", "")!!.toInt()
 
+            var response: Response? = null
+
             if (updatingExistentProduct) {
                 productDAO.updateProduct(product!!)
-                if (currentGroup > 0) net.updateProduct(currentGroup, product!!, this::notifyUserAndExit)
+                if (currentGroup > 0) response = net.updateProduct(currentGroup, product!!)
             } else {
                 product!!.id = productDAO.insertNewProduct(product!!).toInt()
-                if (currentGroup > 0) net.uploadProduct(currentGroup, product!!, this::notifyUserAndExit)
+                if (currentGroup > 0) response = net.uploadProduct(currentGroup, product!!)
             }
+
+            if (response != null) {
+                Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
+            }   
+
+            finish()
         }
         update()
 
@@ -201,14 +207,6 @@ class AddProductActivity : AppCompatActivity() {
 
     }
 
-    fun notifyUserAndExit(response: Response) {
-        runOnUiThread {
-            Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
-            loadingDialog.dismiss()
-            finish()
-        }
-    }
-
     private val intentLauncher =
         registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
             if (result.resultCode == Activity.RESULT_OK) {

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/ExpiryCalendarActivity.kt

@@ -7,6 +7,8 @@ import android.os.Bundle
 import android.widget.LinearLayout
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.database.ProductDAO
@@ -24,7 +26,13 @@ class ExpiryCalendarActivity : AppCompatActivity() {
 
         setContentView(R.layout.fragment_expiry_dates)
 
-        sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(this, sharedPreferences.getString("currentGroup", "database")!!)
         productDAO = ProductDAO(dbHelper)

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/FindBarcodelessAbstractProduct.kt

@@ -18,7 +18,7 @@ class FindBarcodelessAbstractProduct() : AppCompatActivity() {
         binding = ActivityFindBarcodelessAbstractProductBinding.inflate(layoutInflater)
 
         val ft = supportFragmentManager.beginTransaction()
-        val fragment = StorageFragment.newInstance("barcodeless", arrayOf("", "             ", " "))
+        val fragment = StorageFragment.newInstance("barcodeless", arrayOf("", "             "))
         ft.replace(R.id.content, fragment)
         ft.commit()
 

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/FullscreenActivity.kt

@@ -15,7 +15,10 @@ import java.io.File
 
 class FullscreenActivity : Activity() {
 
+    private lateinit var binding: ActivityFullscreenBinding
     private lateinit var fullscreenImageView: ImageView
+    private lateinit var fullscreenContentControls: LinearLayout
+    private val hideHandler = Handler(Looper.myLooper()!!)
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/GroupActivity.kt

@@ -1,12 +1,12 @@
 package org.foxarmy.barcodescannerforemployees.activities
 
-import android.app.ProgressDialog
 import android.content.Intent
 import android.os.Bundle
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
-import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.databinding.ActivityGroupBinding
 import org.foxarmy.barcodescannerforemployees.noInternetConnectionAvailableNotification
 
@@ -20,12 +20,13 @@ class GroupActivity : AppCompatActivity() {
         binding = ActivityGroupBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-        val loadingDialog = ProgressDialog(this)
+        val sharedPreferences = EncryptedSharedPreferences.create(
-        loadingDialog.setMessage(getString(R.string.loading_please_wait))
+            "sensitive",
-        loadingDialog.setCancelable(false)
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
-        loadingDialog.setTitle(getString(R.string.loading))
+            applicationContext,
-
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
-        val sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         binding.createGroupButton.setOnClickListener {
             val groupName = binding.groupNameTextEdit.text.toString()
@@ -35,14 +36,10 @@ class GroupActivity : AppCompatActivity() {
             net.server = sharedPreferences.getString("server", "")!!
             net.token = sharedPreferences.getString("token", "")!!
 
-            net.serverIsAvailable(this, { isServerAvailable ->
+            if (!net.serverIsAvailable(this)) {
-                if (!isServerAvailable) {
                 noInternetConnectionAvailableNotification(this)
             } else {
-                    runOnUiThread {
+                val response = net.createGroup(groupName, groupPassword)
-                        loadingDialog.show()
-                    }
-                    net.createGroup(groupName, groupPassword, { response ->
                 val responseText = response.body!!.string()
 
                 if (response.code == 200) {
@@ -50,21 +47,13 @@ class GroupActivity : AppCompatActivity() {
                     currentGroups!!.add(responseText)
                     sharedPreferences.edit().putStringSet("groups", currentGroups).apply()
                     sharedPreferences.edit().putString("currentGroup", responseText).apply()
-                            runOnUiThread {
                     val intent = Intent(this, MainActivity::class.java)
                     startActivity(intent)
-                                loadingDialog.dismiss()
                     finish()
-                            }
                 } else {
-                            runOnUiThread {
-                                loadingDialog.dismiss()
                     Toast.makeText(this, responseText, Toast.LENGTH_LONG).show()
                 }
             }
-                    })
-                }
-            })
         }
 
         binding.joinGroupButton.setOnClickListener {
@@ -76,25 +65,18 @@ class GroupActivity : AppCompatActivity() {
             net.server = sharedPreferences.getString("server", "")!!
             net.token = sharedPreferences.getString("token", "")!!
 
-            net.serverIsAvailable(this) { isServerAvailable ->
+            if (!net.serverIsAvailable(this)) {
-                if (!isServerAvailable) {
                 noInternetConnectionAvailableNotification(this)
             } else {
-                    runOnUiThread {
+                val requestGroupIdResponse = net.getGroupId(groupName)
-                        loadingDialog.show()
-                    }
-                    net.getGroupId(groupName, { requestGroupIdResponse ->
                 var groupId: Int
                 try {
                    groupId = requestGroupIdResponse.toInt()
                 } catch (e: Exception) {
-                            runOnUiThread {
-                                loadingDialog.dismiss()
                     Toast.makeText(this, requestGroupIdResponse, Toast.LENGTH_SHORT).show()
+                    return@setOnClickListener
                 }
-                            return@getGroupId
+                val response = net.joinGroup(groupId, groupPassword)
-                        }
-                        net.joinGroup(groupId, groupPassword, { response ->
                 val responseText = response.body!!.string()
 
                 if (response.code == 200) {
@@ -102,22 +84,13 @@ class GroupActivity : AppCompatActivity() {
                     currentGroups!!.add(groupId.toString())
                     sharedPreferences.edit().putStringSet("groups", currentGroups).apply()
                     sharedPreferences.edit().putString("currentGroup", groupId.toString()).apply()
-                                runOnUiThread {
                     val intent = Intent(this, MainActivity::class.java)
                     startActivity(intent)
-                                    loadingDialog.dismiss()
                     finish()
-                                }
                 } else {
-                                runOnUiThread {
-                                    loadingDialog.dismiss()
                     Toast.makeText(this, responseText, Toast.LENGTH_LONG).show()
                 }
             }
-                        })
-                    })
-                }
-            }
         }
     }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/LoginActivity.kt

@@ -1,16 +1,17 @@
 package org.foxarmy.barcodescannerforemployees.activities
 
-import android.app.ProgressDialog
 import android.content.Intent
 import android.os.Bundle
 import android.widget.ArrayAdapter
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.databinding.ActivityLoginBinding
 import org.foxarmy.barcodescannerforemployees.noInternetConnectionAvailableNotification
-import org.foxarmy.barcodescannerforemployees.parseIntArray
+import org.foxarmy.barcodescannerforemployees.parseArray
 import org.json.JSONObject
 
 class LoginActivity : AppCompatActivity() {
@@ -23,14 +24,15 @@ class LoginActivity : AppCompatActivity() {
         binding = ActivityLoginBinding.inflate(layoutInflater);
         setContentView(binding.root)
 
-        val loadingDialog = ProgressDialog(this)
-        loadingDialog.setMessage(getString(R.string.loading_please_wait))
-        loadingDialog.setCancelable(false)
-        loadingDialog.setTitle(getString(R.string.loading))
-
         fillUpLanguagesSpinner()
 
-        val sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         binding.loginButton.setOnClickListener {
             val server = binding.serverTextEdit.text.toString()
@@ -43,19 +45,13 @@ class LoginActivity : AppCompatActivity() {
             net.language = sharedPreferences.getString("language", "en-US")!!
             net.server = server
 
-            net.serverIsAvailable(this, { isServerAvailable ->
+            if (!net.serverIsAvailable(this)) {
-                if (!isServerAvailable) {
                 noInternetConnectionAvailableNotification(this)
             } else {
-                    runOnUiThread {
+                val response = net.login(username, password)
-                        loadingDialog.show()
-                    }
-                    net.login(username, password, { response ->
                 val responseText = response.body!!.string()
                 if (response.code != 200) {
-                            runOnUiThread {
                     Toast.makeText(this, responseText, Toast.LENGTH_SHORT).show()
-                            }
                 } else {
                     val json = JSONObject(responseText)
                     sharedPreferences.edit().putString("token", json["token"].toString()).apply()
@@ -63,25 +59,18 @@ class LoginActivity : AppCompatActivity() {
                     sharedPreferences.edit().putInt("userId", json["id"].toString().toInt()).apply()
                     sharedPreferences.edit().putString("server", server).apply()
 
-                            net.getMyGroups({ response ->
+
-                                runOnUiThread {
+                    val r = net.getMyGroups().body!!.string()
-                                    loadingDialog.dismiss()
+                    val myGroups = parseArray(r).map { a -> a.toString()}
-                                }
-                                val r = response.body!!.string()
-                                if (r == "" || r == "[]") {
-                                    goToActivity("GroupActivity")
-                                }
-                                val myGroups = parseIntArray(r).map { a -> a.toString() }
 
                     sharedPreferences.edit().putStringSet("groups", myGroups.toSet()).apply()
                     sharedPreferences.edit().putString("currentGroup", myGroups[0]).apply()
 
-                                goToActivity("MainActivity")
+                    val intent = Intent(this, MainActivity::class.java)
-                            })
+                    startActivity(intent)
+                    finish()
                 }
-                    })
             }
-            })
         }
 
         binding.registerButton.setOnClickListener {
@@ -96,30 +85,24 @@ class LoginActivity : AppCompatActivity() {
             net.language = language
             net.server = server
 
-            net.serverIsAvailable(this, {isServerAvailable ->
+            if (!net.serverIsAvailable(this)) {
-                if (!isServerAvailable) {
                 noInternetConnectionAvailableNotification(this)
             } else {
-                    net.registerAccount(username, password, {response ->
+                val response = net.registerAccount(username, password);
                 val responseText = response.body!!.string()
                 if (response.code != 200) {
                     Toast.makeText(this, responseText, Toast.LENGTH_SHORT).show();
                 } else {
                     sharedPreferences.edit().putInt("userId", responseText.toInt()).apply()
-                            net.login(username, password, {response ->
+                    val token = JSONObject(net.login(username, password).body!!.string())["token"].toString()
-                                val token = JSONObject(response.body!!.string())["token"].toString()
                     sharedPreferences.edit().putString("token", token).apply()
 
                     sharedPreferences.edit().putString("server", server).apply()
-                                runOnUiThread {
+                    val intent = Intent(this, GroupActivity::class.java)
-                                    loadingDialog.dismiss()
+                    startActivity(intent)
+                    finish()
                 }
-                                goToActivity("GroupActivity")
-                            })
             }
-                    })
-                }
-            })
         }
 
         binding.offlineButton.setOnClickListener {
@@ -134,22 +117,9 @@ class LoginActivity : AppCompatActivity() {
 
     private fun fillUpLanguagesSpinner() {
         val languages = resources.getStringArray(R.array.languages)
-        val arrayAdapter =
+        val arrayAdapter = ArrayAdapter(this, androidx.appcompat.R.layout.support_simple_spinner_dropdown_item, languages)
-            ArrayAdapter(this, androidx.appcompat.R.layout.support_simple_spinner_dropdown_item, languages)
         arrayAdapter.setDropDownViewResource(androidx.appcompat.R.layout.support_simple_spinner_dropdown_item)
         binding.languageSpinner.adapter = arrayAdapter
     }
 
-    private fun goToActivity(activityName: String) {
-        runOnUiThread {
-            val intent = Intent(this, when(activityName) {
-                "MainActivity" -> MainActivity::class.java
-                "GroupActivity" -> GroupActivity::class.java
-                "LoginActivity" -> LoginActivity::class.java
-                else -> LoginActivity::class.java
-            })
-            startActivity(intent)
-            finish()
-        }
-    }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/MainActivity.kt

@@ -1,10 +1,8 @@
 package org.foxarmy.barcodescannerforemployees.activities
 
 import android.app.Activity
-import android.app.ProgressDialog
 import android.content.DialogInterface
 import android.content.Intent
-import android.content.SharedPreferences
 import android.os.Bundle
 import android.util.Log
 import android.view.Menu
@@ -16,6 +14,8 @@ import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.drawerlayout.widget.DrawerLayout
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import androidx.viewpager.widget.ViewPager
 import com.google.android.material.navigation.NavigationView
 import org.foxarmy.barcodescannerforemployees.*
@@ -43,36 +43,16 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
     private var actionBarDrawerToggle: ActionBarDrawerToggle? = null
     private lateinit var ws: WebSocketClient
 
-    var selectionMode = false
-    private var selectedAmount = 0
-
-    private lateinit var sharedPreferences: SharedPreferences
-
-    private lateinit var loadingDialog: ProgressDialog
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-        loadingDialog = ProgressDialog(this)
-        loadingDialog.setMessage(getString(R.string.loading_please_wait))
-        loadingDialog.setCancelable(false)
-        loadingDialog.setTitle(getString(R.string.loading))
-
-        sharedPreferences = getPreferences(this)
-
         setSupportActionBar(binding.toolbar)
         setupViewPager(binding.tabViewpager)
         binding.tabTablayout.setupWithViewPager(binding.tabViewpager)
 
-        binding.tabTablayout.setOnDragListener { _, _ ->
-            selectionMode = false
-            selectedAmount = 0
-            true
-        }
-
         drawerLayout = binding.drawerLayout
         actionBarDrawerToggle = ActionBarDrawerToggle(this, drawerLayout, R.string.nav_open, R.string.nav_close)
 
@@ -82,6 +62,14 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
 
         supportActionBar!!.setDisplayHomeAsUpEnabled(true)
 
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
+
         binding.expiryCalendarFab.setOnClickListener { _ ->
             val expiryCalendarIntent = Intent(this, ExpiryCalendarActivity::class.java)
             val extras = Bundle()
@@ -89,7 +77,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
             ContextCompat.startActivity(this, expiryCalendarIntent, extras)
         }
 
-        binding.newElementFab.setOnClickListener { _ ->
+        binding.newElementFab.setOnClickListener { view ->
             val currentPosition = binding.tabTablayout.selectedTabPosition
             val fragment = adapter.getItem(currentPosition)
 
@@ -124,21 +112,26 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         val net = Net()
         net.server = sharedPreferences.getString("server", "")!!
         val currentGroup = sharedPreferences.getString("currentGroup", "offline")!!
-        net.serverIsAvailable(this, {isServerAvailable ->
+        if ( currentGroup != "offline" && !net.serverIsAvailable(this)) {
-            if ( currentGroup != "offline" && !isServerAvailable) {
-                runOnUiThread {
             noInternetConnectionAvailableNotification(this)
-                }
+        } else if (currentGroup != "offline" && net.serverIsAvailable(this)) {
-            } else if (currentGroup != "offline" && isServerAvailable) {
             synchronize()
             ws = WebSocketClient(this, sharedPreferences.getString("server", "")!!)
             val token = sharedPreferences.getString("token", "")!!
             ws.connect(token, currentGroup)
         }
-        })
     }
 
     private fun synchronize() {
+
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
+
         if (sharedPreferences.getString("currentGroup", "offline")!! == "offline") return
 
         val net = Net()
@@ -149,8 +142,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
 
         val currentGroup = sharedPreferences.getString("currentGroup", "")!!.toInt()
 
-        net.synchronize(currentGroup, {response ->
+        val data = JSONObject(net.synchronize(currentGroup).body!!.string())
-            val data = JSONObject(response.body!!.string())
 
         val remoteAbstractProducts = data["abstract_products"] as JSONArray
         val remoteProducts = data["products"] as JSONArray
@@ -169,7 +161,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         syncAbstractProducts(net, currentGroup, abstractProductDAO, remoteAbstractProducts, localAbstractProducts)
         syncProducts(productDAO, remoteProducts, localProducts)
         syncCategories(categoryDAO, remoteCategories, localCategories)
-        })
+
     }
 
     private fun syncCategories(
@@ -312,11 +304,12 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
                 val pictureFile =
                     File(picturesDir, "${remoteAbstractProduct["image_filename"]}.png")
                 val url = "https://${net.server}/api/abstractproduct/getImage/${currentGroup}/${localId}"
-                net.downloadImage(url, pictureFile, {
+                net.downloadImage(url, pictureFile)
+
                 val newAbstractProduct = AbstractProduct.createFromJSON(remoteAbstractProduct)
 
                 abstractProductDAO.addAbstractProduct(newAbstractProduct)
-                })
+
             }
 
             if (abstractProductInRemoteDB != null && abstractProductInLocalDB != null) {
@@ -326,11 +319,11 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
                     val pictureFile =
                         File(File(filesDir, "pictures"), "${abstractProductInRemoteDB["image_filename"]}.png")
                     val url = "https://${net.server}/api/abstractproduct/getImage/${currentGroup}/${localId}"
-                    net.downloadImage(url, pictureFile, {
+                    net.downloadImage(url, pictureFile)
+
                     val updatedData = AbstractProduct.createFromJSON(abstractProductInRemoteDB)
 
                     abstractProductDAO.updateAbstractProduct(updatedData)
-                    })
                 }
             }
         }
@@ -344,7 +337,6 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         adapter.addFragment(CategoriesFragment(), getString(R.string.categories_title))
 
         viewpager.adapter = adapter
-        viewpager.offscreenPageLimit = 3
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
@@ -354,6 +346,13 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
     }
 
     private fun isOffline(): Boolean {
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
         return sharedPreferences.getString("currentGroup", "") == "offline"
     }
 
@@ -381,15 +380,6 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
             R.id.nav_settings -> {
                 intent = Intent(this, SettingsActivity::class.java)
             }
-
-            R.id.nav_logout -> {
-                sharedPreferences.edit().putString("currentGroup", "").apply()
-                sharedPreferences.edit().putStringSet("groups", emptySet()).apply()
-                sharedPreferences.edit().putString("token", "").apply()
-                sharedPreferences.edit().putString("server", "").apply()
-
-                intent = Intent(this, LoginActivity::class.java)
-            }
         }
         startActivity(intent)
 
@@ -505,17 +495,4 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         val storageFragment = fragment as StorageFragment
         storageFragment.filterByCategory(id)
     }
-
-    fun addSelection() {
-        selectionMode = true
-        selectedAmount ++
-    }
-
-    fun removeSelection() {
-        selectedAmount --
-        if (selectedAmount <= 0) {
-            selectedAmount = 0
-            selectionMode = false
-        }
-    }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/ManageGroupActivity.kt

@@ -1,27 +1,19 @@
 package org.foxarmy.barcodescannerforemployees.activities
 
 import android.content.Context
-import android.content.Intent
-import android.content.SharedPreferences
 import android.os.Bundle
 import android.view.View
-import android.widget.EditText
-import android.widget.PopupMenu
-import android.widget.Toast
-import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
-import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.databinding.ActivityManageGroupBinding
-import org.foxarmy.barcodescannerforemployees.parseIntArray
+import org.foxarmy.barcodescannerforemployees.parseArray
 import org.foxarmy.barcodescannerforemployees.views.GroupMemberView
 
-class ManageGroupActivity : AppCompatActivity() {
+class ManageGroupActivity : AppCompatActivity(){
     private lateinit var binding: ActivityManageGroupBinding
-    private var isAdmin: Boolean = false
+    private var isAdmin: Boolean = true
-    private lateinit var sharedPreferences: SharedPreferences
-    private lateinit var net: Net
-    private var groupId: Int = 0
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -29,150 +21,56 @@ class ManageGroupActivity : AppCompatActivity() {
         binding = ActivityManageGroupBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-        groupId = intent.extras!!.getInt("groupId")
+        val groupId = intent.extras!!.getInt("groupId")
 
-        sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+        val masterKeyAlias = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC)
 
-        net = Net()
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            masterKeyAlias,
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
-        net.token = sharedPreferences.getString("token", "")!!
-        net.server = sharedPreferences.getString("server", "")!!
-        net.language = sharedPreferences.getString("language", "en-US")!!
-
-
-        setUpMembers()
-
-        binding.renameButton.setOnClickListener {
-            val input = EditText(this)
-            AlertDialog.Builder(this)
-                .setTitle(getString(R.string.new_group_name))
-                .setView(input)
-                .setPositiveButton(getString(R.string.ok)) { _, _ ->
-                    val newName = input.text.toString()
-                    net.renameGroup(groupId, newName, { response ->
-                        runOnUiThread {
-                            Toast.makeText(this, response.body!!.string(), Toast.LENGTH_LONG).show()
-                        }
-                    })
-
-                }
-                .setNegativeButton(getString(R.string.cancel)) { _, _ ->
-
-                }.show()
-        }
-
-        binding.leaveButton.setOnClickListener {
-            net.leaveGroup(groupId, { response ->
-                runOnUiThread {
-                    Toast.makeText(this, response.body!!.string(), Toast.LENGTH_SHORT).show()
-                }
-                if (response.code == 200) {
-                    val groups = sharedPreferences.getStringSet("groups", emptySet())!!
-                    groups.remove(groupId.toString())
-                    sharedPreferences.edit().putStringSet("groups", groups).apply()
-                    sharedPreferences.edit().putString("currentGroup", "").apply()
-
-                    if (groups.isEmpty()) {
-                        runOnUiThread {
-                            val intent = Intent(this, GroupActivity::class.java)
-                            startActivity(intent)
-                            finish()
-                        }
-                    }
-                    sharedPreferences.edit().putString("currentGroup", groups.toList()[0]).apply()
-                    runOnUiThread {
-                        finish()
-                    }
-                }
-            })
-        }
-
-        setUpAdminRelatedButtons()
-    }
-
-    private fun setUpMembers() {
-        net.getUsersInGroup(groupId, { response ->
-            val users = parseIntArray(response.body!!.string())
-            for (user in users) {
-                net.getUsernameById(user, { response ->
-                    val groupMemberView = GroupMemberView(this, this as Context, response.body!!.string(), user)
-
-                    groupMemberView.setOnLongClickListener { view ->
-                        amIAnAdminIn(groupId, { amIAnAdmin ->
-                            if (!amIAnAdmin) return@amIAnAdminIn
-                            runOnUiThread {
-                                val popupMenu = PopupMenu(this, groupMemberView)
-                                popupMenu.inflate(R.menu.user_pop_menu)
-                                popupMenu.setOnMenuItemClickListener { item ->
-                                    when (item.itemId) {
-                                        R.id.kick -> {
-
-                                            setUpMembers()
-                                            false
-                                        }
-
-                                        R.id.transfer_ownership -> {
-                                            AlertDialog.Builder(this)
-                                                .setMessage(getString(R.string.transfer_ownership_confirmation))
-                                                .setPositiveButton(R.string.yes) { _, _ ->
-                                                    net.transfer_ownership(
-                                                        groupId,
-                                                        (view as GroupMemberView).userId,
-                                                        { response ->
-                                                            runOnUiThread {
-                                                                Toast.makeText(
-                                                                    this,
-                                                                    response.body!!.string(),
-                                                                    Toast.LENGTH_SHORT
-                                                                ).show()
-                                                                setUpAdminRelatedButtons()
-                                                            }
-                                                        })
-
-                                                }
-                                                .setNegativeButton(R.string.no) { _, _ -> }
-                                                .show()
-                                            true
-                                        }
-
-                                        else -> false
-                                    }
-                                }
-                                runOnUiThread {
-                                    popupMenu.show()
-                                }
-                            }
-                        })
-                        true
-                    }
-                    runOnUiThread {
-                        binding.groupsContent.addView(groupMemberView)
-                    }
-                })
-            }
-        })
-    }
-
-    fun amIAnAdminIn(groupId: Int, callback: (Boolean) -> Unit) {
         val net = Net()
 
         net.token = sharedPreferences.getString("token", "")!!
         net.server = sharedPreferences.getString("server", "")!!
         net.language = sharedPreferences.getString("language", "en-US")!!
 
-        net.getGroupAdminId(groupId, { response ->
+
-            val result = sharedPreferences.getInt("userId", 0) == response.body!!.string().toInt()
+        val users = parseArray(net.getUsersInGroup(groupId).body!!.string())
-            callback(result)
+
-        })
+        for (user in users) {
+            val groupMemberView = GroupMemberView(this, this as Context, net.getUsernameById(user).body!!.string(), user)
+
+            binding.groupsContent.addView(groupMemberView)
         }
 
-    fun setUpAdminRelatedButtons() {
+        isAdmin = amIAnAdminIn(groupId)
-        amIAnAdminIn(groupId, { isAdmin ->
+
-            runOnUiThread {
         if (!isAdmin) {
             binding.renameButton.visibility = View.GONE
         }
     }
-        })
+
+    fun amIAnAdminIn(groupId: Int): Boolean {
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
+
+        val net = Net()
+
+        net.token = sharedPreferences.getString("token", "")!!
+        net.server = sharedPreferences.getString("server", "")!!
+        net.language = sharedPreferences.getString("language", "en-US")!!
+
+        val result = sharedPreferences.getInt("userId", 0) == net.getGroupAdminId(groupId).body!!.string().toInt()
+        return result
     }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/MyGroupsActivity.kt

@@ -5,10 +5,12 @@ import android.content.Intent
 import android.os.Bundle
 import android.widget.LinearLayout
 import androidx.appcompat.app.AppCompatActivity
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.databinding.ActivityMyGroupsBinding
-import org.foxarmy.barcodescannerforemployees.parseIntArray
+import org.foxarmy.barcodescannerforemployees.parseArray
 import org.foxarmy.barcodescannerforemployees.views.GroupView
 
 class MyGroupsActivity : AppCompatActivity(){
@@ -20,7 +22,13 @@ class MyGroupsActivity : AppCompatActivity(){
         binding = ActivityMyGroupsBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-        val sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val net = Net()
 
@@ -28,28 +36,20 @@ class MyGroupsActivity : AppCompatActivity(){
         net.server = sharedPreferences.getString("server", "")!!
         net.language = sharedPreferences.getString("language", "en-US")!!
 
-        net.getMyGroups { response ->
+        val groups = parseArray(net.getMyGroups().body!!.string())
-            val groups = parseIntArray(response.body!!.string())
-
 
         val container = findViewById<LinearLayout>(R.id.groupsLayout)
 
         for (group in groups) {
-                net.getGroupName(group, {response ->
+            val groupView = GroupView(this, this as Context, net.getGroupName(group), group)
-                    val groupView = GroupView(this, this as Context, response, group)
+
 
-                    runOnUiThread {
             container.addView(groupView)
         }
-                })
-            }
 
         binding.newGroup.setOnClickListener {
-                runOnUiThread {
             val intent = Intent(this, GroupActivity::class.java)
             startActivity(intent)
         }
     }
-        }
-    }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/NavigatorActivity.kt

@@ -4,8 +4,8 @@ import android.app.Activity
 import android.content.Intent
 import android.content.SharedPreferences
 import android.os.Bundle
-import org.foxarmy.barcodescannerforemployees.Net
+import androidx.security.crypto.EncryptedSharedPreferences
-import org.foxarmy.barcodescannerforemployees.parseStringList
+import androidx.security.crypto.MasterKeys
 
 class NavigatorActivity : Activity() {
 
@@ -14,24 +14,27 @@ class NavigatorActivity : Activity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         var intent = Intent(this, MainActivity::class.java)
 
-        isInGroup { flag ->
+        if (!isInGroup() && !isOffline()) {
-            if (!flag && !isOffline()) {
             intent = Intent(this, GroupActivity::class.java)
         }
+
         if (!isAuthenticated() && !isOffline()) {
             intent = Intent(this, LoginActivity::class.java);
         }
 
-            runOnUiThread {
         startActivity(intent);
         finish();
     }
-        }
-    }
 
     private fun isOffline(): Boolean {
         return sharedPreferences.getString("currentGroup", "")!! == "offline"
@@ -41,28 +44,7 @@ class NavigatorActivity : Activity() {
         return sharedPreferences.getString("token", "") != ""
     }
 
-    private fun isInGroup(callback: (Boolean) -> Unit) {
+    private fun isInGroup(): Boolean {
-        val groups = sharedPreferences.getStringSet("groups", emptySet())!!
+        return sharedPreferences.getStringSet("groups", emptySet())!!.isNotEmpty()
-        if (groups.isEmpty()) {
-            if (sharedPreferences.getString("token", "")!! == "") callback(false)
-            val net = Net()
-            net.language = sharedPreferences.getString("language", "")!!
-            net.server = sharedPreferences.getString("server", "")!!
-            net.token = sharedPreferences.getString("token", "")!!
-
-            net.getMyGroups { response ->
-                val responseBody = response.body!!.string()
-                if (responseBody == "" || responseBody == "[]") callback(false)
-                val groupsFromServer = parseStringList(responseBody)
-                if (groupsFromServer.isNotEmpty()) {
-                    sharedPreferences.edit().putStringSet("groups", groupsFromServer.toSet()).apply()
-                    sharedPreferences.edit().putString("currentGroup", groupsFromServer[0]).apply()
-                    callback(true)
-                } else {
-                    callback(false)
-                }
-            }
-        }
-        callback(true)
     }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/SettingsActivity.kt

@@ -6,6 +6,8 @@ import android.os.Bundle
 import android.view.View
 import android.widget.ArrayAdapter
 import androidx.appcompat.app.AppCompatActivity
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
 import org.foxarmy.barcodescannerforemployees.databinding.ActivitySettingsBinding
 
@@ -15,12 +17,17 @@ class SettingsActivity : AppCompatActivity() {
     lateinit var myGroups: List<String>
     lateinit var currentGroup: String
     lateinit var groupsNames: MutableList<String>
-    lateinit var namesMap: MutableMap<Int, String>
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        sharedPreferences = org.foxarmy.barcodescannerforemployees.getPreferences(this)
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         myGroups = sharedPreferences.getStringSet("groups", emptySet())!!.toList()
         currentGroup = sharedPreferences.getString("currentGroup", "offline")!!
@@ -39,27 +46,21 @@ class SettingsActivity : AppCompatActivity() {
         if (isOffline()) {
             binding.currentGroupSetting.visibility = View.GONE
         } else {
-            namesMap = mutableMapOf()
+            groupsNames = mutableListOf()
 
             for (myGroup in myGroups) {
-                net.getGroupName(myGroup.toInt(), { name ->
+                groupsNames.add(net.getGroupName(myGroup.toInt()))
-                    namesMap[myGroup.toInt()] = name
-                    fillUpCurrentGroupSpinner()
-                })
             }
+
+            fillUpCurrentGroupSpinner()
         }
 
         binding.saveButton.setOnClickListener {
-            net.getGroupId(binding.currentGroupSpinner.selectedItem.toString(), { groupId ->
+            sharedPreferences.edit().putString("currentGroup", net.getGroupId(binding.currentGroupSpinner.selectedItem.toString())).apply()
-                sharedPreferences.edit().putString("currentGroup", groupId).apply()
+            sharedPreferences.edit().putInt("imageCompression", binding.imageCompressionFactorSeekBar.progress + 1).apply()
-                sharedPreferences.edit().putInt("imageCompression", binding.imageCompressionFactorSeekBar.progress + 1)
-                    .apply()
-                runOnUiThread {
             setResult(Activity.RESULT_OK)
             finish()
         }
-            })
-        }
 
         binding.cancelButton.setOnClickListener {
             setResult(Activity.RESULT_CANCELED)
@@ -77,27 +78,14 @@ class SettingsActivity : AppCompatActivity() {
     }
 
     private fun fillUpCurrentGroupSpinner() {
-        runOnUiThread {
         if (currentGroup == "offline") {
             binding.currentGroupSetting.visibility = View.GONE
         }
-            groupsNames = mutableListOf()
-            groupsNames.clear()
-            val sortedMap = namesMap.entries.sortedBy { it.key }.associate { it.toPair() }
-            for ((id, name) in sortedMap) {
-                groupsNames.add(name)
-            }
 
         val arrayAdapter =
             ArrayAdapter(this, androidx.appcompat.R.layout.support_simple_spinner_dropdown_item, groupsNames)
         arrayAdapter.setDropDownViewResource(androidx.appcompat.R.layout.support_simple_spinner_dropdown_item)
         binding.currentGroupSpinner.adapter = arrayAdapter
-            if (myGroups.indexOf(currentGroup) < groupsNames.size) binding.currentGroupSpinner.setSelection(
+        binding.currentGroupSpinner.setSelection(myGroups.indexOf(currentGroup))
-                myGroups.indexOf(
-                    currentGroup
-                )
-            )
-        }
-
     }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/database/AbstractProductDAO.kt

@@ -308,7 +308,7 @@ class AbstractProductDAO(private val dbHelper: DBStorageController) {
             }
 
             "barcodeless" -> {
-                selection = "${AbstractProductContract.AbstractProductEntry.BARCODE} = ? OR ${AbstractProductContract.AbstractProductEntry.BARCODE} = ? OR ${AbstractProductContract.AbstractProductEntry.BARCODE} = ?"
+                selection = "${AbstractProductContract.AbstractProductEntry.BARCODE} = ? OR ${AbstractProductContract.AbstractProductEntry.BARCODE} = ?"
                 selectionArgs = filter
             }
         }

app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/CategoriesFragment.kt

@@ -11,31 +11,36 @@ import android.widget.Toast
 import androidx.core.content.ContextCompat
 import androidx.core.view.children
 import androidx.fragment.app.Fragment
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.activities.AddCategoryActivity
 import org.foxarmy.barcodescannerforemployees.database.CategoryDAO
 import org.foxarmy.barcodescannerforemployees.database.DBStorageController
-import org.foxarmy.barcodescannerforemployees.getPreferences
 import org.foxarmy.barcodescannerforemployees.views.CategoryView
-import kotlin.concurrent.thread
 
 class CategoriesFragment : Fragment() {
 
     private lateinit var sharedPreferences: SharedPreferences
     private lateinit var categoryDAO: CategoryDAO
-    private var updateInProgress = false
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        sharedPreferences = getPreferences(requireContext())
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            requireContext(),
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         prepareDatabaseConnection()
     }
 
     private fun prepareDatabaseConnection() {
-        val dbHelper = DBStorageController(requireContext(), sharedPreferences.getString("currentGroup", "offline")!!)
+        val dbHelper = DBStorageController(requireContext(), sharedPreferences.getString("currentGroup", "database")!!)
         categoryDAO = CategoryDAO(dbHelper)
     }
 
@@ -53,7 +58,6 @@ class CategoriesFragment : Fragment() {
     }
 
     fun removeSelected() {
-        thread {
         val layout = view?.findViewById<LinearLayout>(R.id.categoriesLayout)
 
         var deleted = false
@@ -66,27 +70,22 @@ class CategoriesFragment : Fragment() {
                 val currentGroup = sharedPreferences.getString("currentGroup", "")!!.toInt()
 
                 categoryDAO.eraseCategory(view.category.id, requireContext())
-                    net.deleteCategory(currentGroup, view.category.id, {response ->
+                val response = net.deleteCategory(currentGroup, view.category.id)
                 activity!!.runOnUiThread{
                     Toast.makeText(context, response.body!!.string(), Toast.LENGTH_SHORT).show()
                 }
 
-                    })
                 deleted = true
             }
         }
 
         if (!deleted) {
-                activity!!.runOnUiThread {
             Toast.makeText(requireContext(), getString(R.string.nothing_to_delete), Toast.LENGTH_SHORT).show()
         }
-            }
         updateContent()
     }
-    }
 
     fun updateSelected() {
-        thread {
         val layout = view?.findViewById<LinearLayout>(R.id.categoriesLayout)
         for (view: CategoryView in layout?.children!!.iterator() as Iterator<CategoryView>) {
             if (view.isCategorySelected) {
@@ -94,37 +93,24 @@ class CategoriesFragment : Fragment() {
                 val extras = Bundle()
                 extras.putParcelable("category", view.category)
                 addCategoryIntent.putExtras(extras)
-                    activity!!.runOnUiThread {
                 ContextCompat.startActivity(context!!, addCategoryIntent, extras)
             }
         }
     }
-        }
-    }
 
     fun updateContent() {
-        thread {
-            if (updateInProgress) return@thread
-            updateInProgress = true
         prepareDatabaseConnection()
         val layout = view?.findViewById<LinearLayout>(R.id.categoriesLayout)
-            activity!!.runOnUiThread {
         layout?.removeAllViews()
-            }
 
         val categories = categoryDAO.getAllCategories()
 
         for (category in categories) {
             val categoryView = CategoryView(requireActivity(), requireContext(), category)
-                activity!!.runOnUiThread {
             layout?.addView(categoryView)
         }
     }
 
-            updateInProgress = false
-        }
-    }
-
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 

app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/ShelfFragment.kt

@@ -14,13 +14,14 @@ import androidx.core.content.ContextCompat
 import androidx.core.view.children
 import androidx.fragment.app.Fragment
 import androidx.gridlayout.widget.GridLayout
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.activities.AddProductActivity
 import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.database.ProductDAO
 import org.foxarmy.barcodescannerforemployees.databinding.FragmentShelfBinding
-import org.foxarmy.barcodescannerforemployees.getPreferences
 import org.foxarmy.barcodescannerforemployees.views.ProductView
 import kotlin.concurrent.thread
 
@@ -37,9 +38,16 @@ class ShelfFragment : Fragment() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        sharedPreferences = getPreferences(requireContext())
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            requireContext(),
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         prepareDatabaseConnection()
+
     }
 
     override fun onCreateView(
@@ -114,12 +122,11 @@ class ShelfFragment : Fragment() {
     }
 
     fun updateContent() {
+        prepareDatabaseConnection()
         thread {
             if (updateInProgress) return@thread
             updateInProgress = true
-            prepareDatabaseConnection()
             val grv = view?.findViewById<GridLayout>(R.id.contentGridLayout)
-
             activity!!.runOnUiThread {
                 grv?.removeAllViews()
             }
@@ -137,6 +144,7 @@ class ShelfFragment : Fragment() {
                 }
             }
             updateInProgress = false
+
         }
     }
 
@@ -157,11 +165,10 @@ class ShelfFragment : Fragment() {
                     val currentGroup = sharedPreferences.getString("currentGroup", "")!!.toInt()
 
                     productDAO.eraseProduct(view.product.id)
-                    net.deleteProduct(currentGroup, view.product.id, {response ->
+                    val response = net.deleteProduct(currentGroup, view.product.id)
                     activity!!.runOnUiThread{
                         Toast.makeText(context, response.body!!.string(), Toast.LENGTH_SHORT).show()
                     }
-                    })
 
                     deleted = true
                 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/StorageFragment.kt

@@ -7,10 +7,11 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.*
-import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.core.content.ContextCompat
 import androidx.core.view.children
 import androidx.fragment.app.Fragment
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.activities.AddAbstractProductActivity
@@ -19,7 +20,6 @@ import org.foxarmy.barcodescannerforemployees.database.AbstractProductDAO
 import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.databinding.FragmentStorageBinding
 import org.foxarmy.barcodescannerforemployees.generateThumbnailForImage
-import org.foxarmy.barcodescannerforemployees.getPreferences
 import org.foxarmy.barcodescannerforemployees.views.AbstractProductView
 import kotlin.concurrent.thread
 
@@ -32,18 +32,23 @@ class StorageFragment : Fragment() {
     private lateinit var sharedPreferences: SharedPreferences
     private lateinit var abstractProductDAO: AbstractProductDAO
 
-    private var updateInProcess = false
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View {
-        binding = FragmentStorageBinding.inflate(inflater)
+        sharedPreferences = EncryptedSharedPreferences.create(
-
+            "sensitive",
-        sharedPreferences = getPreferences(requireContext())
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            requireContext(),
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         prepareDatabaseConnection()
 
+        binding = FragmentStorageBinding.inflate(inflater)
+
         fillUpSortBySpinner()
 
         binding.spinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
@@ -102,12 +107,10 @@ class StorageFragment : Fragment() {
                     val currentGroup = sharedPreferences.getString("currentGroup", "")!!.toInt()
 
                     abstractProductDAO.eraseAbstractProduct(view.abstractProduct.id, requireContext())
-                    net.deleteAbstractProduct(currentGroup, view.abstractProduct.id, {response ->
+                    val response = net.deleteAbstractProduct(currentGroup, view.abstractProduct.id)
                     activity!!.runOnUiThread{
                         Toast.makeText(context, response.body!!.string(), Toast.LENGTH_SHORT).show()
                     }
-                    })
-
 
                     deleted = true
                 }
@@ -138,14 +141,10 @@ class StorageFragment : Fragment() {
     }
 
     fun updateContent() {
-        thread {
-            if (updateInProcess) return@thread
-            updateInProcess = true
         prepareDatabaseConnection()
-
+        thread {
             val grv = binding.contentGridLayout
-
+            activity!!.runOnUiThread{
-            activity!!.runOnUiThread {
                 grv.removeAllViews()
             }
 
@@ -161,36 +160,26 @@ class StorageFragment : Fragment() {
                 )
 
                 if (filterBy == "barcodeless") {
-                    abstractProductView.also {
+                    abstractProductView.setOnClickListener {
-                        it.setOnClickListener {
                         (activity as FindBarcodelessAbstractProduct).selected(abstractProductView.abstractProduct)
                     }
-                        it.findViewById<TextView>(R.id.productNameView).setOnClickListener {
+                    abstractProductView.findViewById<TextView>(R.id.productNameView).setOnClickListener {
                         (activity as FindBarcodelessAbstractProduct).selected(abstractProductView.abstractProduct)
                     }
-                        it.findViewById<ConstraintLayout>(R.id.productLayout).setOnClickListener {
-                            (activity as FindBarcodelessAbstractProduct).selected(abstractProductView.abstractProduct)
-                        }
-                        it.findViewById<TextView>(R.id.categoryView).setOnClickListener {
-                            (activity as FindBarcodelessAbstractProduct).selected(abstractProductView.abstractProduct)
-                        }
-                        it.findViewById<TextView>(R.id.unitView).setOnClickListener {
-                            (activity as FindBarcodelessAbstractProduct).selected(abstractProductView.abstractProduct)
-                        }
-                        it.findViewById<TextView>(R.id.productNetWeightView).setOnClickListener {
-                            (activity as FindBarcodelessAbstractProduct).selected(abstractProductView.abstractProduct)
-                        }
-                    }
                 }
 
                 activity!!.runOnUiThread{
                     grv.addView(abstractProductView)
                 }
             }
-            updateInProcess = false
+        }.join()
-        }
     }
 
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        updateContent()
+    }
 
     fun filterByCategory(id: Int) {
         filterBy = "category"
@@ -205,7 +194,7 @@ class StorageFragment : Fragment() {
             val args = Bundle()
             args.putString("filterBy", filterBy)
             args.putStringArray("filter", filter)
-            fragment.arguments = args
+            fragment.setArguments(args)
 
             return fragment
         }

app/src/main/java/org/foxarmy/barcodescannerforemployees/views/AbstractProductView.kt

@@ -14,15 +14,19 @@ import android.widget.Toast
 import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.core.content.ContextCompat
 import androidx.core.content.ContextCompat.startActivity
-import org.foxarmy.barcodescannerforemployees.*
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
+import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.activities.FullscreenActivity
-import org.foxarmy.barcodescannerforemployees.activities.MainActivity
 import org.foxarmy.barcodescannerforemployees.database.CategoryDAO
 import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.dataclasses.AbstractProduct
+import org.foxarmy.barcodescannerforemployees.getActivity
+import org.foxarmy.barcodescannerforemployees.getImageUri
+import org.foxarmy.barcodescannerforemployees.getUnitNameById
 import java.io.File
 
-class AbstractProductView : LinearLayout {
+class AbstractProductView: LinearLayout {
     private var productLayout: ConstraintLayout? = null
     private var productPicture: ImageView? = null
     private var productNameField: TextView? = null
@@ -38,10 +42,16 @@ class AbstractProductView : LinearLayout {
 
     constructor(context: Context, a: AttributeSet) : super(context, a) {
         activity = getActivity(context)!!
-        val inflater: LayoutInflater = activity.layoutInflater
+        val inflater:LayoutInflater = activity.layoutInflater
         inflater.inflate(R.layout.abstract_product_view, this)
 
-        sharedPreferences = getPreferences(context)
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            context,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(context, sharedPreferences.getString("currentGroup", "database")!!)
         categoryDAO = CategoryDAO(dbHelper)
@@ -50,17 +60,23 @@ class AbstractProductView : LinearLayout {
     constructor(activity: Activity, context: Context, abstractProduct: AbstractProduct) : super(context) {
         this.abstractProduct = abstractProduct
         this.activity = activity
-        val inflater: LayoutInflater = activity.layoutInflater
+        val inflater:LayoutInflater = activity.layoutInflater
         inflater.inflate(R.layout.abstract_product_view, this)
 
-        sharedPreferences = getPreferences(context)
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            context,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(context, sharedPreferences.getString("currentGroup", "database")!!)
         categoryDAO = CategoryDAO(dbHelper)
         update()
     }
 
-    private fun init() {
+    fun init () {
         productLayout = findViewById(R.id.productLayout)
         productPicture = findViewById(R.id.productPicture)
         productNameField = findViewById(R.id.productNameView)
@@ -68,8 +84,30 @@ class AbstractProductView : LinearLayout {
         categoryField = findViewById(R.id.categoryView)
         unitField = findViewById(R.id.unitView)
 
-        setUpClicks()
+
+        productPicture!!.setOnClickListener {
+            val fullscreenIntent = Intent(activity, FullscreenActivity::class.java)
+            val extras = Bundle()
+            extras.putString("imagehash", abstractProduct.imageHash)
+            fullscreenIntent.putExtras(extras)
+            startActivity(context, fullscreenIntent, extras)
+        }
+
+        productLayout!!.setOnClickListener {
+
+        }
+
         unitField?.text = getUnitNameById(context, abstractProduct.unit)
+
+        productLayout!!.setOnLongClickListener {
+            isProductSelected = !isProductSelected
+            this.background = ContextCompat.getDrawable(context, if (isProductSelected) R.drawable.outline_selected else R.drawable.outline)
+            true
+        }
+
+        productNameField!!.setOnClickListener {
+            Toast.makeText(activity, productNameField!!.text, Toast.LENGTH_SHORT).show()
+        }
     }
 
     fun update() {
@@ -79,126 +117,10 @@ class AbstractProductView : LinearLayout {
         thumbnailsDir.mkdirs()
         val imageUri = getImageUri(activity, File(thumbnailsDir, "${abstractProduct.imageHash}.webp"))
         productPicture!!.setImageURI(imageUri)
+//        productPicture!!.rotation = 90f
 
         productNameField!!.text = abstractProduct.name
         netWeightField!!.text = abstractProduct.netWeight.toString()
         categoryField!!.text = categoryDAO.getCategoryNameById(abstractProduct.category)
     }
-
-
-    private fun setUpClicks() {
-        productLayout!!.setOnLongClickListener { onAnyLongClick() }
-        productNameField!!.setOnLongClickListener { onNameLongClick() }
-        productPicture!!.setOnLongClickListener { onImageLongClick() }
-        netWeightField!!.setOnLongClickListener { onAnyLongClick() }
-        categoryField!!.setOnLongClickListener { onAnyLongClick() }
-        unitField!!.setOnLongClickListener { onAnyLongClick() }
-
-        productLayout!!.setOnClickListener { onAnyClick() }
-        netWeightField!!.setOnClickListener { onAnyClick() }
-        categoryField!!.setOnClickListener { onAnyClick() }
-        unitField!!.setOnClickListener { onAnyClick() }
-        productPicture!!.setOnClickListener { onImageLongClick() }
-        productNameField!!.setOnClickListener { onNameLongClick() }
-    }
-
-    private fun onAnyClick(): Boolean {
-        if (activity !is MainActivity) return false
-        val mainActivity = activity as MainActivity
-
-        if (mainActivity.selectionMode) {
-            isProductSelected = !isProductSelected
-
-            if (isProductSelected) {
-                mainActivity.addSelection()
-            } else {
-                mainActivity.removeSelection()
-            }
-            activity.runOnUiThread {
-                this.background = ContextCompat.getDrawable(
-                    context,
-                    if (isProductSelected) R.drawable.outline_selected else R.drawable.outline
-                )
-            }
-            return true
-        } else {
-            return false
-        }
-    }
-
-    private fun onAnyLongClick(): Boolean {
-        if (activity !is MainActivity) return false
-        val mainActivity = activity as MainActivity
-
-        if (mainActivity.selectionMode) {
-            isProductSelected = !isProductSelected
-
-            if (isProductSelected) {
-                mainActivity.addSelection()
-            } else {
-                mainActivity.removeSelection()
-            }
-            activity.runOnUiThread {
-                this.background = ContextCompat.getDrawable(
-                    context,
-                    if (isProductSelected) R.drawable.outline_selected else R.drawable.outline
-                )
-            }
-            return true
-        } else {
-            mainActivity.addSelection()
-
-            isProductSelected = !isProductSelected
-            activity.runOnUiThread {
-
-                this.background = ContextCompat.getDrawable(
-                    context,
-                    if (isProductSelected) R.drawable.outline_selected else R.drawable.outline
-                )
-            }
-            return true
-        }
-    }
-
-    private fun onImageLongClick(): Boolean {
-        if (activity !is MainActivity) {
-            val fullscreenIntent = Intent(activity, FullscreenActivity::class.java)
-            val extras = Bundle()
-            extras.putString("imagehash", abstractProduct.imageHash)
-            fullscreenIntent.putExtras(extras)
-            startActivity(context, fullscreenIntent, extras)
-            return true
-        }
-        val mainActivity = activity as MainActivity
-
-        if (mainActivity.selectionMode) {
-            return onAnyLongClick()
-        } else {
-            val fullscreenIntent = Intent(activity, FullscreenActivity::class.java)
-            val extras = Bundle()
-            extras.putString("imagehash", abstractProduct.imageHash)
-            fullscreenIntent.putExtras(extras)
-            startActivity(context, fullscreenIntent, extras)
-        }
-        return true
-    }
-
-    private fun onNameLongClick(): Boolean {
-        if (activity !is MainActivity) {
-            activity.runOnUiThread {
-                Toast.makeText(activity, productNameField!!.text, Toast.LENGTH_SHORT).show()
-            }
-            return true
-        }
-        val mainActivity = activity as MainActivity
-
-        if (mainActivity.selectionMode) {
-            return onAnyLongClick()
-        } else {
-            activity.runOnUiThread {
-                Toast.makeText(activity, productNameField!!.text, Toast.LENGTH_SHORT).show()
-            }
-        }
-        return true
-    }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/views/CategoryView.kt

@@ -7,16 +7,16 @@ import android.view.LayoutInflater
 import android.widget.LinearLayout
 import android.widget.TextView
 import androidx.core.content.ContextCompat
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.activities.MainActivity
 import org.foxarmy.barcodescannerforemployees.database.AbstractProductDAO
 import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.dataclasses.Category
-import org.foxarmy.barcodescannerforemployees.getPreferences
 
 class CategoryView : LinearLayout {
     var category: Category
-
     val categoryName: TextView
     val amountOfProducts: TextView
     var isCategorySelected = false
@@ -27,7 +27,13 @@ class CategoryView : LinearLayout {
     constructor(activity: Activity, context: Context, category: Category) : super(context) {
         this.category = category
 
-        sharedPreferences = getPreferences(context)
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            context,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(context, sharedPreferences.getString("currentGroup", "database")!!)
         abstractProductDAO = AbstractProductDAO(dbHelper)
@@ -35,7 +41,7 @@ class CategoryView : LinearLayout {
         val inflater: LayoutInflater = activity.layoutInflater
         inflater.inflate(R.layout.category_view, this)
 
-        updateStroke()
+        this.background = ContextCompat.getDrawable(context, if (isCategorySelected) R.drawable.outline_selected else R.drawable.outline)
 
         categoryName = findViewById(R.id.categoryNameTextView)
         amountOfProducts = findViewById(R.id.amountOfProducts)
@@ -43,47 +49,13 @@ class CategoryView : LinearLayout {
         categoryName.text = category.name
         amountOfProducts.text = abstractProductDAO.getAmountOfAbstractProductsInCategory(category.id).toString()
 
-        setUpClicks()
+        setOnLongClickListener {
-    }
-
-    private fun setUpClicks() {
-        categoryName.setOnClickListener { onCategoryClick() }
-        amountOfProducts.setOnClickListener { onCategoryClick() }
-
-        categoryName.setOnLongClickListener { onAnyLongClick() }
-        amountOfProducts.setOnLongClickListener { onAnyLongClick() }
-    }
-
-    private fun onCategoryClick(): Boolean {
-        if (context !is MainActivity) return false
-        val mainActivity = context as MainActivity
-
-        if (mainActivity.selectionMode) return onAnyLongClick()
-        else (context as MainActivity).filterAbstractProductsByCategory(category.id)
-
-        return true
-    }
-
-    private fun onAnyLongClick(): Boolean {
-        if (context !is MainActivity) return false
-        val mainActivity = context as MainActivity
-
             isCategorySelected = !isCategorySelected
-        updateStroke()
-
-        if (mainActivity.selectionMode) {
-            if (isCategorySelected) mainActivity.addSelection()
-            else mainActivity.removeSelection()
-        } else {
-            mainActivity.addSelection()
-        }
-        return true
-
-    }
-
-    private fun updateStroke() {
-        (context as Activity).runOnUiThread {
             this.background = ContextCompat.getDrawable(context, if (isCategorySelected) R.drawable.outline_selected else R.drawable.outline)
+            true
+        }
+        setOnClickListener {
+            (activity as MainActivity).filterAbstractProductsByCategory(category.id)
         }
     }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/views/ExpiryGroupView.kt

@@ -7,11 +7,12 @@ import android.view.LayoutInflater
 import android.widget.LinearLayout
 import android.widget.TextView
 import androidx.core.content.ContextCompat
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.activities.ExpiryCalendarActivity
 import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.database.ProductDAO
-import org.foxarmy.barcodescannerforemployees.getPreferences
 import java.text.SimpleDateFormat
 
 class ExpiryGroupView : LinearLayout {
@@ -23,7 +24,13 @@ class ExpiryGroupView : LinearLayout {
 
     constructor(activity: Activity, context: Context, representingDate: Long) : super(context) {
 
-        sharedPreferences = getPreferences(context)
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            context,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(context, sharedPreferences.getString("currentGroup", "database")!!)
         productDAO = ProductDAO(dbHelper)

app/src/main/java/org/foxarmy/barcodescannerforemployees/views/GroupMemberView.kt

@@ -10,7 +10,7 @@ import org.foxarmy.barcodescannerforemployees.R
 class GroupMemberView : LinearLayout {
 
     private var username: String
-    var userId: Int
+    private var userId: Int
 
     constructor(activity: Activity, context: Context, username: String, userId: Int) : super(context) {
 

app/src/main/java/org/foxarmy/barcodescannerforemployees/views/ProductView.kt

@@ -13,7 +13,6 @@ import android.view.LayoutInflater
 import android.widget.ImageView
 import android.widget.LinearLayout
 import android.widget.TextView
-import android.widget.Toast
 import androidx.annotation.RequiresApi
 import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.core.content.ContextCompat
@@ -22,26 +21,29 @@ import androidx.core.graphics.blue
 import androidx.core.graphics.green
 import androidx.core.graphics.red
 import androidx.core.math.MathUtils.clamp
-import org.foxarmy.barcodescannerforemployees.*
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
+import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.activities.FullscreenActivity
-import org.foxarmy.barcodescannerforemployees.activities.MainActivity
+import org.foxarmy.barcodescannerforemployees.calculateProductFreshness
 import org.foxarmy.barcodescannerforemployees.database.AbstractProductDAO
 import org.foxarmy.barcodescannerforemployees.database.CategoryDAO
 import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.dataclasses.AbstractProduct
 import org.foxarmy.barcodescannerforemployees.dataclasses.Product
+import org.foxarmy.barcodescannerforemployees.getActivity
+import org.foxarmy.barcodescannerforemployees.getImageUri
 import java.io.File
 import java.text.DecimalFormat
 import java.text.SimpleDateFormat
 import java.util.*
 import kotlin.concurrent.thread
 
-class ProductView : LinearLayout {
+class ProductView: LinearLayout {
     var product: Product = Product()
     var isProductSelected = false
     private var activity: Activity
 
-    private lateinit var productLayout: ConstraintLayout
     private lateinit var productImageView: ImageView
     private lateinit var productNameTextView: TextView
     private lateinit var productNetWeightTextView: TextView
@@ -61,7 +63,13 @@ class ProductView : LinearLayout {
     constructor(context: Context, a: AttributeSet) : super(context, a) {
         activity = getActivity(context)!!
 
-        sharedPreferences = getPreferences(context)
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            context,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(context, sharedPreferences.getString("currentGroup", "offline")!!)
         abstractProductDAO = AbstractProductDAO(dbHelper)
@@ -78,13 +86,18 @@ class ProductView : LinearLayout {
         val inflater: LayoutInflater = activity.layoutInflater
         inflater.inflate(R.layout.product_view, this)
 
-        sharedPreferences = getPreferences(context)
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            context,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
 
         val dbHelper = DBStorageController(context, sharedPreferences.getString("currentGroup", "offline")!!)
         abstractProductDAO = AbstractProductDAO(dbHelper)
         categoryDAO = CategoryDAO(dbHelper)
 
-        productLayout = findViewById(R.id.productLayout)
         productImageView = findViewById(R.id.productPicture)
         productNameTextView = findViewById(R.id.productNameView)
         productNetWeightTextView = findViewById(R.id.productNetWeightView)
@@ -93,129 +106,45 @@ class ProductView : LinearLayout {
         productLifeSpan = findViewById(R.id.dateSpan)
         productFreshnessTextView = findViewById(R.id.freshnessPercentTextView)
 
-        setUpClicks()
+        findViewById<ConstraintLayout>(R.id.productLayout).setOnLongClickListener {
+            isProductSelected = !isProductSelected
+            updateStroke()
+            true
+        }
+
+        productImageView.setOnClickListener {
+            val fullscreenIntent = Intent(activity, FullscreenActivity::class.java)
+            val extras = Bundle()
+            val abstractProduct = abstractProductDAO.findAbstractProductById(product.abstractProductId)
+            extras.putString("imagehash", abstractProduct!!.imageHash)
+            fullscreenIntent.putExtras(extras)
+            startActivity(context, fullscreenIntent, extras)
+        }
 
         update()
     }
 
     @RequiresApi(Build.VERSION_CODES.O)
-    private fun setUpClicks() {
+    fun update () {
-        productLayout.setOnLongClickListener { onAnyLongClick() }
+        val linkedAbstractProduct: AbstractProduct = abstractProductDAO.findAbstractProductById(product.abstractProductId) ?: return
-        productImageView.setOnLongClickListener { onImageLongClick() }
-        productNameTextView.setOnLongClickListener { onNameLongClick() }
-        productNetWeightTextView.setOnLongClickListener { onAnyLongClick() }
-        productAmountTextView.setOnLongClickListener { onAnyLongClick() }
-        productCategoryView.setOnLongClickListener { onAnyLongClick() }
-        productLifeSpan.setOnLongClickListener { onAnyLongClick() }
-        productFreshnessTextView.setOnLongClickListener { onAnyLongClick() }
-
-        productLayout.setOnClickListener { onAnyClick() }
-        productImageView.setOnClickListener { onImageLongClick() }
-        productNameTextView.setOnClickListener { onNameLongClick() }
-        productNetWeightTextView.setOnClickListener { onAnyClick() }
-        productAmountTextView.setOnClickListener { onAnyClick() }
-        productCategoryView.setOnClickListener { onAnyClick() }
-        productLifeSpan.setOnClickListener { onAnyClick() }
-        productFreshnessTextView.setOnClickListener { onAnyClick() }
-    }
-
-    @RequiresApi(Build.VERSION_CODES.O)
-    private fun onAnyClick(): Boolean {
-        if (activity !is MainActivity) return false
-        val mainActivity = activity as MainActivity
-
-        if (mainActivity.selectionMode) {
-            isProductSelected = !isProductSelected
-
-            if (isProductSelected) mainActivity.addSelection()
-            else mainActivity.removeSelection()
-
-            updateStroke()
-
-            return true
-        } else {
-            return false
-        }
-    }
-
-    @RequiresApi(Build.VERSION_CODES.O)
-    private fun onAnyLongClick(): Boolean {
-        if (activity !is MainActivity) return false
-        val mainActivity = activity as MainActivity
-
-        isProductSelected = !isProductSelected
-        updateStroke()
-
-        if (mainActivity.selectionMode) {
-            if (isProductSelected) mainActivity.addSelection()
-            else mainActivity.removeSelection()
-        } else {
-            mainActivity.addSelection()
-        }
-        return true
-
-    }
-
-    private fun onNameLongClick(): Boolean {
-        if (activity !is MainActivity) {
-            Toast.makeText(activity, productNameTextView.text, Toast.LENGTH_SHORT).show()
-            return true
-        }
-        val mainActivity = activity as MainActivity
-
-        if (mainActivity.selectionMode) return onAnyLongClick()
-        else Toast.makeText(activity, productNameTextView.text, Toast.LENGTH_SHORT).show()
-        return true
-    }
-
-    private fun onImageLongClick(): Boolean {
-        val abstractProduct = abstractProductDAO.findAbstractProductById(product.abstractProductId)
-
-        if (activity !is MainActivity) {
-            val fullscreenIntent = Intent(activity, FullscreenActivity::class.java)
-            val extras = Bundle()
-            extras.putString("imagehash", abstractProduct!!.imageHash)
-            fullscreenIntent.putExtras(extras)
-            startActivity(context, fullscreenIntent, extras)
-            return true
-        }
-        val mainActivity = activity as MainActivity
-
-        if (mainActivity.selectionMode) {
-            return onAnyLongClick()
-        } else {
-            val fullscreenIntent = Intent(activity, FullscreenActivity::class.java)
-            val extras = Bundle()
-            extras.putString("imagehash", abstractProduct!!.imageHash)
-            fullscreenIntent.putExtras(extras)
-            startActivity(context, fullscreenIntent, extras)
-        }
-        return true
-    }
-
-    @RequiresApi(Build.VERSION_CODES.O)
-    fun update() {
-        val linkedAbstractProduct: AbstractProduct =
-            abstractProductDAO.findAbstractProductById(product.abstractProductId) ?: return
 
         val thumbnailsDir = File(activity.cacheDir, "thumbnails")
         thumbnailsDir.mkdirs()
         val pictureFile = File(thumbnailsDir, "${linkedAbstractProduct.imageHash}.webp")
         val imageUri = getImageUri(activity, pictureFile)
         productImageView.setImageURI(imageUri)
+//        productImageView.rotation = 90f
 
         productNameTextView.text = linkedAbstractProduct.name
         productNetWeightTextView.text = linkedAbstractProduct.netWeight.toString()
         productAmountTextView.text = product.amount.toString()
         productCategoryView.text = categoryDAO.getCategoryNameById(linkedAbstractProduct.category)
-        productLifeSpan.text = "${SimpleDateFormat("dd.MM.yyyy").format(Date(product.dateOfProduction * 1000))}-${
+        productLifeSpan.text = "${SimpleDateFormat("dd.MM.yyyy").format(Date(product.dateOfProduction*1000))}-${SimpleDateFormat("dd.MM.yyyy").format(Date(product.dateOfExpiry*1000))}"
-            SimpleDateFormat("dd.MM.yyyy").format(Date(product.dateOfExpiry * 1000))
-        }"
         productFreshnessTextView.text =
         if (product.freshness == Double.NEGATIVE_INFINITY || product.freshness == Double.POSITIVE_INFINITY || product.freshness < 0) {
             context.getString(R.string.expired)
         } else {
-                "${DecimalFormat("#.#").format(product.freshness * 100)}%"
+            "${DecimalFormat("#.#").format(product.freshness*100)}%"
         }
 
         updateStroke()
@@ -223,11 +152,11 @@ class ProductView : LinearLayout {
 
     @RequiresApi(Build.VERSION_CODES.O)
     fun updateStroke() {
-        activity.runOnUiThread {
          if (isProductSelected) {
              this.background = ContextCompat.getDrawable(context, R.drawable.outline_selected)
         } else {
              if (product.id != 0) {
+                 thread {
                      this.outline = GradientDrawable()
                      backgroundColor = evaluateColor()
                      strokeColor = darkenColor(backgroundColor, 0.25) // (backgroundColor and 0xfefefe ) shr 1
@@ -235,12 +164,12 @@ class ProductView : LinearLayout {
                      this.outline.setStroke(4, strokeColor)
                      this.outline.alpha = 84
                      this.background = outline
+                 }
              } else {
                  this.background = ContextCompat.getDrawable(context, R.drawable.outline)
              }
         }
     }
-    }
 
     @RequiresApi(Build.VERSION_CODES.O)
     fun evaluateColor(): Int {
@@ -249,14 +178,12 @@ class ProductView : LinearLayout {
     }
 
     fun calculateFreshnessGradient(percentage: Double): Int {
-        val startColor =
+        val startColor = ContextCompat.getColor(context, if (percentage > 0.5) R.color.full_freshness else R.color.half_freshness)
-            ContextCompat.getColor(context, if (percentage > 0.5) R.color.full_freshness else R.color.half_freshness)
+        val endColor = ContextCompat.getColor(context, if (percentage > 0.5) R.color.half_freshness else R.color.expired_freshness)
-        val endColor =
-            ContextCompat.getColor(context, if (percentage > 0.5) R.color.half_freshness else R.color.expired_freshness)
 
         val gradientPosition = 1 - if (percentage > 0.5) (percentage - 0.5) * 2 else percentage * 2
 
-        val red = clamp((startColor.red + gradientPosition * (endColor.red - startColor.red)).toInt(), 0, 255)
+        val red = clamp((startColor.red + gradientPosition * (endColor.red - startColor.red )).toInt(), 0, 255)
         val green = clamp((startColor.green  + gradientPosition * (endColor.green - startColor.green)).toInt(), 0, 255)
         val blue = clamp((startColor.blue + gradientPosition * (endColor.blue - startColor.blue)).toInt(), 0, 255)
 
@@ -267,7 +194,7 @@ class ProductView : LinearLayout {
         if (greenHex.length == 1) greenHex = "0$greenHex"
 
         var blueHex = Integer.toHexString(blue)
-        if (blueHex.length == 1) blueHex = "0$blueHex"
+        if (blueHex.length == 1 ) blueHex = "0$blueHex"
 
 
         val colorString = "#$redHex$greenHex$blueHex"
@@ -275,7 +202,7 @@ class ProductView : LinearLayout {
     }
 
     @RequiresApi(Build.VERSION_CODES.O)
-    fun darkenColor(color: Int, darkPercent: Double): Int {
+    fun darkenColor(color: Int, darkPercent: Double) : Int {
         val c = Color.valueOf(color)
 
         val red = c.red() * (1 - darkPercent)

app/src/main/res/layout/abstract_product_view.xml

@@ -8,7 +8,7 @@
     <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_width="match_parent"
             android:layout_height="match_parent" android:id="@+id/productLayout" android:outlineProvider="bounds"
-            android:background="#00FFFEFE" android:clickable="true" android:translationZ="0sp">
+            android:background="#00FFFEFE" android:clickable="true">
         <ImageView
                 android:layout_width="match_parent"
                 android:layout_height="200dp" app:srcCompat="@android:drawable/ic_menu_gallery"

app/src/main/res/layout/activity_find_barcodeless_abstract_product.xml

@@ -1,15 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout
+<androidx.core.widget.NestedScrollView
         xmlns:android="http://schemas.android.com/apk/res/android"
-        xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools"
+        xmlns:tools="http://schemas.android.com/tools"
-        android:layout_width="match_parent" android:layout_height="match_parent">
+        android:layout_width="match_parent"
-
+        android:layout_height="match_parent"
-    <androidx.core.widget.NestedScrollView
-            android:layout_height="0dp"
         tools:context=".fragments.ShelfFragment"
-            android:id="@+id/content" android:layout_width="0dp" app:layout_constraintTop_toTopOf="parent"
+        android:id="@+id/content">
-            app:layout_constraintStart_toStartOf="parent" app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent">
 
-    </androidx.core.widget.NestedScrollView>
+</androidx.core.widget.NestedScrollView>
-</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_main.xml

@@ -39,13 +39,12 @@
             <androidx.viewpager.widget.ViewPager
                     android:id="@+id/tab_viewpager"
                     android:layout_width="0dp"
-                    android:layout_height="0dp"
+                    android:layout_height="777dp"
                     app:layout_behavior="@string/appbar_scrolling_view_behavior" android:layout_gravity="bottom"
                     android:layout_marginTop="2dp"
                     app:layout_constraintTop_toBottomOf="@+id/appBarLayout"
                     app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="6dp"
-                    app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="6dp"
+                    app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="6dp"/>
-                    app:layout_constraintBottom_toBottomOf="parent"/>
             <com.google.android.material.floatingactionbutton.FloatingActionButton
                     android:id="@+id/new_element_fab"
                     android:layout_width="wrap_content"

app/src/main/res/layout/content_storage.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" android:id="@+id/storageLayout">
+
+    <fragment
+            android:id="@+id/nav_host_fragment_content_storage"
+            android:name="androidx.navigation.fragment.NavHostFragment"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:defaultNavHost="true"
+            app:navGraph="@navigation/nav_graph_main"/>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/fragment_shelf.xml

@@ -26,8 +26,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="match_parent" app:layout_constraintTop_toBottomOf="@+id/spinner"
                 android:layout_marginTop="32dp" app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintEnd_toEndOf="parent" android:id="@+id/scrollView"
+                app:layout_constraintEnd_toEndOf="parent" android:id="@+id/scrollView">
-                app:layout_constraintBottom_toBottomOf="parent">
             <androidx.gridlayout.widget.GridLayout
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content" android:id="@+id/contentGridLayout" app:columnCount="2"

app/src/main/res/layout/fragment_storage.xml

@@ -1,9 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
-
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-<androidx.constraintlayout.widget.ConstraintLayout
+             xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
-        xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto">
+             android:id="@+id/fragment_storage"
+             tools:context=".fragments.StorageFragment">
+    <androidx.constraintlayout.widget.ConstraintLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
 
         <TextView
                 android:text="@string/sort_by"
@@ -12,7 +16,7 @@
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toTopOf="parent"
                 android:textAlignment="center"
-                app:layout_constraintBottom_toTopOf="@+id/scrollView2"/>
+                app:layout_constraintBottom_toBottomOf="@+id/scrollView2"/>
         <Spinner
                 android:layout_width="0dp"
                 android:layout_height="32dp" android:id="@+id/spinner"
@@ -30,16 +34,15 @@
                 android:layout_marginEnd="10dp" app:layout_constraintTop_toTopOf="parent"/>
         <ScrollView
                 android:layout_width="match_parent"
-                android:layout_height="0dp"
+                android:layout_height="wrap_content"
                 android:id="@+id/scrollView2"
-                app:layout_constraintTop_toBottomOf="@+id/dropFiltersButton"
+                app:layout_constraintTop_toBottomOf="@+id/dropFiltersButton">
-                android:layout_marginTop="4dp" app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintEnd_toEndOf="parent">
             <androidx.gridlayout.widget.GridLayout
                     android:layout_width="match_parent"
-                    android:layout_height="match_parent" android:id="@+id/contentGridLayout" app:columnCount="2"
+                    android:layout_height="wrap_content" android:id="@+id/contentGridLayout" app:columnCount="2"
                     app:rowCount="100" android:nestedScrollingEnabled="true">
 
             </androidx.gridlayout.widget.GridLayout>
         </ScrollView>
     </androidx.constraintlayout.widget.ConstraintLayout>
+</FrameLayout>

app/src/main/res/menu/drawer_menu.xml

@@ -12,5 +12,4 @@
     <item
             android:id="@+id/nav_settings"
             android:title="@string/settings"/>
-    <item android:title="@string/logout" android:id="@+id/nav_logout"/>
 </menu>

app/src/main/res/menu/user_pop_menu.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <item android:title="@string/kick" android:id="@+id/kick"/>
-    <item android:title="@string/transfer_ownership" android:id="@+id/transfer_ownership"/>
-</menu>

app/src/main/res/values-ru/strings.xml

@@ -118,14 +118,6 @@
     <string name="ok">Ок</string>
     <string name="logout">Выйти</string>
     <string name="online_only_feature">Эта возможность доступна только с онлайн аккаунтом</string>
-    <string name="username_changed">Имя пользователя изменено. Пожалуйста, перезайдите</string>
-    <string name="password_changed">Пароль изменён. Пожалуйста, перезайдите</string>
-    <string name="new_group_name">Введите новое имя группы</string>
-    <string name="kick">Выгнать</string>
-    <string name="transfer_ownership">Передать владение группой</string>
-    <string name="transfer_ownership_confirmation">Вы увереных, что хотите передать владение группой этому пользователю?</string>
-    <string name="loading_please_wait">Загрузка, пожалуйста ждите</string>
-    <string name="loading">Загрузка</string>
     <string-array name="languages">
         <item>en-US</item>
         <item>ru-RU</item>

app/src/main/res/values/strings.xml

@@ -116,14 +116,6 @@
     <string name="ok">OK</string>
     <string name="logout">Log out</string>
     <string name="online_only_feature">This feature is online only</string>
-    <string name="username_changed">Your username has been changed. Please, relogin</string>
-    <string name="password_changed">You password was changed. Please, relogin</string>
-    <string name="new_group_name">Enter new group name</string>
-    <string name="kick">Kick</string>
-    <string name="transfer_ownership">Transfer ownership</string>
-    <string name="transfer_ownership_confirmation">Are you sure you want to transfer ownership on current group to that user?</string>
-    <string name="loading_please_wait">Loading, please wait</string>
-    <string name="loading">Loading</string>
     <string-array name="languages">
         <item>en-US</item>
         <item>ru-RU</item>