Enabled a function that displays an Alert Dialog if the user wants to…

… leave the app

app/src/main/kotlin/com/d4rk/cartcalculator/MainActivity.kt

@@ -19,6 +19,7 @@ import com.d4rk.cartcalculator.notifications.managers.AppUsageNotificationsManag
 import com.d4rk.cartcalculator.ui.settings.display.theme.style.AppTheme
 import com.d4rk.cartcalculator.ui.startup.StartupActivity
 import com.google.android.gms.ads.MobileAds
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.snackbar.Snackbar
 import com.google.android.play.core.appupdate.AppUpdateManager
 import com.google.android.play.core.appupdate.AppUpdateManagerFactory
@@ -65,6 +66,30 @@ class MainActivity : ComponentActivity() {
         checkForFlexibleUpdate()
     }
 
+    /**
+     * This method overrides the `onBackPressed()` method **(deprecated in Java)** to display a confirmation dialog
+     * before closing the activity. While this method might work, it's recommended to use more modern approaches
+     * for handling back button presses, such as using Navigation components or Activity lifecycles.
+     *
+     * This method is annotated with `@Deprecated` and `@Suppress("DEPRECATION")` to explicitly mark it as deprecated
+     * and suppress compiler warnings during its usage.
+     *
+     * Consider utilizing alternative approaches for handling back button events.
+     */
+    @Deprecated("Deprecated in Java")
+    @Suppress("DEPRECATION")
+    override fun onBackPressed() {
+        MaterialAlertDialogBuilder(this)
+            .setTitle(R.string.close)
+            .setMessage(R.string.summary_close)
+            .setPositiveButton(android.R.string.yes) { _, _ ->
+                super.onBackPressed()
+                moveTaskToBack(true)
+            }
+            .setNegativeButton(android.R.string.no, null)
+            .apply { show() }
+    }
+
     /**
      * Overrides the `onActivityResult` method to handle the result of an activity launched for result.
      *

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

@@ -5,7 +5,6 @@
     <string name="welcome">Welcome</string>
     <string name="browse_terms_of_service_and_privacy_policy">Browse the <i><u>Terms of Service</u></i> and <i><u>Privacy Policy</u></i></string>
     <string name="agree">Agree</string>
-    <string name="add_your_item">Add your item</string>
     <string name="quantity">Quantity</string>
     <string name="settings">Settings</string>
     <string name="appearance">Appearance</string>
@@ -22,8 +21,6 @@
     <string name="runtime">Runtime</string>
     <string name="license">License</string>
     <string name="share">Share</string>
-    <string name="share_using">Share using…</string>
-    <string name="share_subject">Try it now!!!</string>
     <string name="device_info">Device Info</string>
     <string name="app_build">App Build: Release\n%1$s\n%2$s\n%3$s\n%4$s\n%5$s</string>
     <string name="manufacturer">Manufacturer:</string>