Fix notifications on Android 13+ by asking permission

app/src/main/AndroidManifest.xml

@@ -35,8 +35,8 @@
     <!-- To start rss and torrents background check services -->
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="android.permission.VIBRATE" />
-    <!-- To export settings file to external storage -->
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <!-- To show torrent and app update notifications -->
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
 
     <uses-feature
         android:name="android.hardware.touchscreen"

app/src/main/java/org/transdroid/core/gui/navigation/NavigationHelper.java

@@ -18,14 +18,12 @@ package org.transdroid.core.gui.navigation;
 
 import android.Manifest;
 import android.annotation.SuppressLint;
-import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.net.Uri;
-import android.os.Build;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.style.TypefaceSpan;
@@ -60,9 +58,7 @@ import java.util.List;
 @EBean
 public class NavigationHelper {
 
-    private static final int REQUEST_TORRENT_READ_PERMISSION = 0;
-    private static final int REQUEST_SETTINGS_READ_PERMISSION = 1;
-    private static final int REQUEST_SETTINGS_WRITE_PERMISSION = 2;
+    private static final int REQUEST_NOTIFICATIONS_PERMISSION = 0;
 
     private static ImageLoader imageCache;
     @RootContext
@@ -134,7 +130,11 @@ public class NavigationHelper {
         return null;
     }
 
-    private boolean checkPermission(final Activity activity, final String permission, final int requestCode) {
+    public boolean checkOrRequestNotificationPermission(final Activity activity) {
+        return checkPermission(activity, Manifest.permission.POST_NOTIFICATIONS, REQUEST_NOTIFICATIONS_PERMISSION, R.string.permission_notifications);
+    }
+
+    private boolean checkPermission(final Activity activity, final String permission, final int requestCode, final int explainer) {
         if (hasPermission(permission))
             // Permission already granted
             return true;
@@ -142,43 +142,27 @@ public class NavigationHelper {
             // Never asked again: show a dialog with an explanation
             activity.runOnUiThread(() ->
                     new AlertDialog.Builder(context)
-                            .setMessage(R.string.permission_readtorrent)
+                            .setMessage(explainer)
                             .setPositiveButton(android.R.string.ok, (dialog, which) ->
                                     ActivityCompat.requestPermissions(activity, new String[]{permission}, requestCode))
                             .show());
             return false;
         }
         // Permission not granted (and we asked for it already before)
-        ActivityCompat.requestPermissions(activity, new String[]{permission}, REQUEST_TORRENT_READ_PERMISSION);
+        ActivityCompat.requestPermissions(activity, new String[]{permission}, requestCode);
         return false;
     }
 
-    private boolean hasPermission(String requiredPermission) {
+    public boolean hasPermission(String requiredPermission) {
         return ContextCompat.checkSelfPermission(context, requiredPermission) == PackageManager.PERMISSION_GRANTED;
     }
 
-    public Boolean handleTorrentReadPermissionResult(int requestCode, int[] grantResults) {
-        if (requestCode == REQUEST_TORRENT_READ_PERMISSION) {
-            // Return permission granting result
-            return grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED;
-        }
-        return null;
-    }
-
-    public Boolean handleSettingsReadPermissionResult(int requestCode, int[] grantResults) {
-        if (requestCode == REQUEST_SETTINGS_READ_PERMISSION) {
+    public Boolean handleNotificationPermissionResult(int requestCode, int[] grantResults) {
+        if (requestCode == REQUEST_NOTIFICATIONS_PERMISSION) {
             // Return permission granting result
             return grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED;
         }
-        return null;
-    }
-
-    public Boolean handleSettingsWritePermissionResult(int requestCode, int[] grantResults) {
-        if (requestCode == REQUEST_SETTINGS_WRITE_PERMISSION) {
-            // Return permission granting result
-            return grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED;
-        }
-        return null;
+        return false;
     }
 
     /**

app/src/main/java/org/transdroid/core/gui/settings/NotificationSettingsActivity.java

@@ -21,6 +21,7 @@ import android.content.SharedPreferences;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
 import android.os.Bundle;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import org.androidannotations.annotations.Bean;
@@ -28,12 +29,15 @@ import org.androidannotations.annotations.EActivity;
 import org.androidannotations.annotations.OptionsItem;
 import org.transdroid.R;
 import org.transdroid.core.app.settings.NotificationSettings;
+import org.transdroid.core.gui.navigation.NavigationHelper;
 import org.transdroid.core.service.RssCheckerJob;
 import org.transdroid.core.service.ServerCheckerJob;
 
 @EActivity
 public class NotificationSettingsActivity extends PreferenceCompatActivity implements OnSharedPreferenceChangeListener {
 
+    @Bean
+    protected NavigationHelper navigationHelper;
     @Bean
     protected NotificationSettings notificationSettings;
 
@@ -45,9 +49,19 @@ public class NotificationSettingsActivity extends PreferenceCompatActivity imple
 
         // Load the notification-related preferences from XML and update availability thereof
         addPreferencesFromResource(R.xml.pref_notifications);
-        boolean disabled = !notificationSettings.isEnabledForRss() && !notificationSettings.isEnabledForTorrents();
-        updatePrefsEnabled(disabled);
+        updatePrefsEnabled();
+
+    }
 
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        if (navigationHelper.handleNotificationPermissionResult(requestCode, grantResults)) {
+            // Now that we have permission, schedule the jobs
+            ServerCheckerJob.schedule(getApplicationContext());
+            RssCheckerJob.schedule(getApplicationContext());
+            updatePrefsEnabled();
+        }
     }
 
     @Override
@@ -76,11 +90,18 @@ public class NotificationSettingsActivity extends PreferenceCompatActivity imple
 
     @Override
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        boolean needsPermission = notificationSettings.isEnabledForRss() || notificationSettings.isEnabledForTorrents();
+        if (needsPermission && !navigationHelper.checkOrRequestNotificationPermission(this)) {
+            return;
+        }
+        // Already have permission to show notifications, so update the jobs now
         ServerCheckerJob.schedule(getApplicationContext());
         RssCheckerJob.schedule(getApplicationContext());
+        updatePrefsEnabled();
     }
 
-    private void updatePrefsEnabled(boolean disabled) {
+    private void updatePrefsEnabled() {
+        boolean disabled = !notificationSettings.isEnabledForRss() && !notificationSettings.isEnabledForTorrents();
         findPreference("notifications_interval").setEnabled(!disabled);
         findPreference("notifications_sound").setEnabled(!disabled);
         findPreference("notifications_vibrate").setEnabled(!disabled);

app/src/main/java/org/transdroid/core/gui/settings/SystemSettingsActivity.java

@@ -24,6 +24,7 @@ import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.text.TextUtils;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AlertDialog;
 import androidx.preference.Preference.OnPreferenceClickListener;
 import androidx.preference.PreferenceManager;
@@ -64,6 +65,7 @@ public class SystemSettingsActivity extends PreferenceCompatActivity {
     protected ErrorLogSender errorLogSender;
     @Bean
     protected SettingsPersistence settingsPersistence;
+
     private OnPreferenceClickListener onImportSettingsClick = preference -> {
         showDialog(DIALOG_IMPORTSETTINGS);
         return true;
@@ -73,7 +75,10 @@ public class SystemSettingsActivity extends PreferenceCompatActivity {
         return true;
     };
     private OnPreferenceClickListener onCheckUpdatesClick = preference -> {
-        AppUpdateJob.schedule(getApplicationContext());
+        if (!navigationHelper.checkOrRequestNotificationPermission(this)) {
+            // Already have permission: continue
+            AppUpdateJob.schedule(getApplicationContext());
+        }
         return true;
     };
     private OnPreferenceClickListener onClearSearchClick = preference -> {
@@ -137,6 +142,15 @@ public class SystemSettingsActivity extends PreferenceCompatActivity {
         MainSettingsActivity_.intent(this).flags(Intent.FLAG_ACTIVITY_CLEAR_TOP).start();
     }
 
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        if (navigationHelper.handleNotificationPermissionResult(requestCode, grantResults)) {
+            // Now that we have permission, schedule the job
+            AppUpdateJob.schedule(getApplicationContext());
+        }
+    }
+
     private void importSettingsFromFile() {
         Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
         intent.addCategory(Intent.CATEGORY_OPENABLE);

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

@@ -462,9 +462,7 @@
         <item>86400</item>
     </string-array>
 
-    <string name="permission_readtorrent">Transdroid requires read access to your file storage in order to read local .torrent files</string>
-    <string name="permission_readsettings">Transdroid requires read access to your file storage if you want to read from a local settings file</string>
-    <string name="permission_writesettings">Transdroid requires write access to your file storage to write the local settings file</string>
+    <string name="permission_notifications">Transdroid requires permission if you want to receive notifications</string>
 
     <string name="error_httperror">Error during communication; check your connection</string>
     <string name="error_unsupported">Your torrent client does not support this operation</string>