a couple of improvements

mobile/app/src/main/java/com/odweta/solen/Dialogs.kt

@@ -9,8 +9,8 @@ class Dialogs {
     class SignOut(context: Context) : AlertDialog(context) {
         init {
             // Initialize your dialog properties
-            setTitle("Upozornění")
-            setMessage("Opravdu se chcete odhlásit? Tato akce vymaže uložené přihlašovací údaje a zavře aplikaci. Budete se poté muset znovu přihlásit.")
+            setTitle("Opravdu se chcete odhlásit?")
+            setMessage("Uložené přihlašovací údaje budou vymazány.")
             setCancelable(true) // Set whether the dialog can be canceled by tapping outside
 
             // Set positive button (e.g., "OK" button)

mobile/app/src/main/java/com/odweta/solen/MainActivity.kt

@@ -1,6 +1,7 @@
 package com.odweta.solen
 
 import android.content.Context
+import android.content.DialogInterface
 import android.content.Intent
 import android.graphics.ImageDecoder
 import android.graphics.drawable.AnimatedImageDrawable
@@ -13,6 +14,7 @@ import android.widget.Button
 import android.widget.EditText
 import android.widget.ImageView
 import android.widget.Toast
+import androidx.activity.OnBackPressedCallback
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.fragment.app.DialogFragment
@@ -72,7 +74,8 @@ class MainActivity : AppCompatActivity() {
 
             R.id.item_sign_in -> {
                 window.statusBarColor = ContextCompat.getColor(this, R.color.black)
-                SignInFragment().show(supportFragmentManager, "fragment_sign_in")
+                val signInFragment = SignInFragment()
+                signInFragment.show(supportFragmentManager, "fragment_sign_in")
                 return true
             }
 
@@ -169,6 +172,7 @@ class MainActivity : AppCompatActivity() {
                 week = Parsing.parseTimeTableJSON(Network.getTimeTableJSON())
                 launchPhase2(week)
             } else {
+                // TODO: IMPLEMENT OFFLINE STUFF
                 // show some sort of warning message and/or load offline files
                 //week =
             }

mobile/app/src/main/java/com/odweta/solen/SignInFragment.kt

@@ -1,12 +1,14 @@
 package com.odweta.solen
 
 import android.app.Dialog
+import android.content.DialogInterface
 import android.os.Bundle
 import androidx.fragment.app.DialogFragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.Window
+import androidx.core.content.ContextCompat
 
 class SignInFragment : DialogFragment() {
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -21,6 +23,16 @@ class SignInFragment : DialogFragment() {
         return inflater.inflate(R.layout.activity_sign_in, container, false)
     }
 
+    override fun onCancel(dialog: DialogInterface) {
+        super.onCancel(dialog)
+
+        // Change statusBarColor when the back button is pressed (dialog dismissed)
+        requireActivity().window.statusBarColor = ContextCompat.getColor(
+            requireContext(),
+            R.color.primary
+        )
+    }
+
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
         val dialog = super.onCreateDialog(savedInstanceState)
         dialog.window?.requestFeature(Window.FEATURE_NO_TITLE)