performance fixes

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

@@ -18,11 +18,13 @@ 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)
@@ -51,6 +53,7 @@ class CategoriesFragment : Fragment() {
     }
 
     fun removeSelected() {
+        thread {
             val layout = view?.findViewById<LinearLayout>(R.id.categoriesLayout)
 
             var deleted = false
@@ -73,12 +76,16 @@ class CategoriesFragment : Fragment() {
             }
 
             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) {
@@ -86,24 +93,37 @@ 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

@@ -114,11 +114,12 @@ 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()
             }
@@ -136,7 +137,6 @@ class ShelfFragment : Fragment() {
                 }
             }
             updateInProgress = false
-
         }
     }
 

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

@@ -17,6 +17,7 @@ import org.foxarmy.barcodescannerforemployees.activities.FindBarcodelessAbstract
 import org.foxarmy.barcodescannerforemployees.database.AbstractProductDAO
 import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.databinding.FragmentStorageBinding
+import org.foxarmy.barcodescannerforemployees.dataclasses.AbstractProduct
 import org.foxarmy.barcodescannerforemployees.generateThumbnailForImage
 import org.foxarmy.barcodescannerforemployees.getPreferences
 import org.foxarmy.barcodescannerforemployees.views.AbstractProductView
@@ -31,6 +32,7 @@ class StorageFragment : Fragment() {
     private lateinit var sharedPreferences: SharedPreferences
     private lateinit var abstractProductDAO: AbstractProductDAO
 
+    private var updateInProcess = false
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
@@ -134,9 +136,13 @@ class StorageFragment : Fragment() {
     }
 
     fun updateContent() {
-        prepareDatabaseConnection()
         thread {
+            if (updateInProcess) return@thread
+            updateInProcess = true
+            prepareDatabaseConnection()
+
             val grv = binding.contentGridLayout
+
             activity!!.runOnUiThread {
                 grv.removeAllViews()
             }
@@ -165,14 +171,10 @@ class StorageFragment : Fragment() {
                     grv.addView(abstractProductView)
                 }
             }
-        }.join()
+            updateInProcess = false
+        }
     }
 
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-
-        updateContent()
-    }
 
     fun filterByCategory(id: Int) {
         filterBy = "category"

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

@@ -14,8 +14,6 @@ import android.widget.Toast
 import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.core.content.ContextCompat
 import androidx.core.content.ContextCompat.startActivity
-import androidx.security.crypto.EncryptedSharedPreferences
-import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.*
 import org.foxarmy.barcodescannerforemployees.activities.FullscreenActivity
 import org.foxarmy.barcodescannerforemployees.activities.MainActivity
@@ -55,13 +53,7 @@ class AbstractProductView : LinearLayout {
         val inflater: LayoutInflater = activity.layoutInflater
         inflater.inflate(R.layout.abstract_product_view, this)
 
-        sharedPreferences = EncryptedSharedPreferences.create(
+        sharedPreferences = getPreferences(context)
-            "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)