added ability to log out

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

@@ -3,6 +3,7 @@ package org.foxarmy.barcodescannerforemployees.activities
 import android.app.Activity
 import android.content.DialogInterface
 import android.content.Intent
+import android.content.SharedPreferences
 import android.os.Bundle
 import android.util.Log
 import android.view.Menu
@@ -43,12 +44,22 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
     private var actionBarDrawerToggle: ActionBarDrawerToggle? = null
     private lateinit var ws: WebSocketClient
 
+    private lateinit var sharedPreferences: SharedPreferences
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
+
         setSupportActionBar(binding.toolbar)
         setupViewPager(binding.tabViewpager)
         binding.tabTablayout.setupWithViewPager(binding.tabViewpager)
@@ -123,15 +134,6 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
     }
 
     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()
@@ -346,13 +348,6 @@ 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"
     }
 
@@ -380,6 +375,15 @@ 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)
 

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

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