Fixed: The WiFi hotspot no longer starts automatically after granting…

… notification permission in Android 13 and above.

* We implemented the `registerForActivityResult` method to handle notification permission, ensuring the hotspot starts seamlessly upon permission grant.
* Improved the permission-asking scenario. Before it ask once for notification permission and at the second time it shows the custom dialog that shows why we need this permission. But we can ask permission twice in our application so we have improved the asking of permission. If the user denies this permission then we show the custom dialog with message why we need this permission.

core/src/main/java/org/kiwix/kiwixmobile/core/webserver/ZimHostFragment.kt

@@ -35,6 +35,7 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.widget.Toolbar
 import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
@@ -47,7 +48,6 @@ import org.kiwix.kiwixmobile.core.databinding.ActivityZimHostBinding
 import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.cachedComponent
 import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.hasNotificationPermission
 import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.isCustomApp
-import org.kiwix.kiwixmobile.core.extensions.ActivityExtensions.requestNotificationPermission
 import org.kiwix.kiwixmobile.core.extensions.toast
 import org.kiwix.kiwixmobile.core.navigateToAppSettings
 import org.kiwix.kiwixmobile.core.reader.ZimFileReader
@@ -120,6 +120,25 @@ class ZimHostFragment : BaseFragment(), ZimHostCallbacks, ZimHostContract.View {
         as ArrayList<String>
     }
 
+  private val notificationPermissionListener = registerForActivityResult(
+    ActivityResultContracts.RequestPermission()
+  ) { isGranted ->
+    if (isGranted) {
+      startStopServer()
+    } else {
+      if (!ActivityCompat.shouldShowRequestPermissionRationale(
+          requireActivity(),
+          POST_NOTIFICATIONS
+        )
+      ) {
+        alertDialogShower.show(
+          KiwixDialog.NotificationPermissionDialog,
+          requireActivity()::navigateToAppSettings
+        )
+      }
+    }
+  }
+
   override fun onCreateView(
     inflater: LayoutInflater,
     container: ViewGroup?,
@@ -173,29 +192,14 @@ class ZimHostFragment : BaseFragment(), ZimHostCallbacks, ZimHostContract.View {
         if (requireActivity().hasNotificationPermission(sharedPreferenceUtil)) {
           startStopServer()
         } else {
-          requestNotificationPermission()
+          notificationPermissionListener.launch(POST_NOTIFICATIONS)
         }
       } else {
         startStopServer()
       }
     }
   }
 
-  private fun requestNotificationPermission() {
-    if (!ActivityCompat.shouldShowRequestPermissionRationale(
-        requireActivity(),
-        POST_NOTIFICATIONS
-      )
-    ) {
-      requireActivity().requestNotificationPermission()
-    } else {
-      alertDialogShower.show(
-        KiwixDialog.NotificationPermissionDialog,
-        requireActivity()::navigateToAppSettings
-      )
-    }
-  }
-
   private fun startStopServer() {
     when {
       ServerUtils.isServerStarted -> stopServer()
@@ -206,6 +210,7 @@ class ZimHostFragment : BaseFragment(), ZimHostCallbacks, ZimHostContract.View {
           else -> startHotspotManuallyDialog()
         }
       }
+
       else -> toast(R.string.no_books_selected_toast_message, Toast.LENGTH_SHORT)
     }
   }