Refactoring

app/src/main/java/eu/faircode/email/ActivitySetup.java

@@ -540,7 +540,7 @@ public class ActivitySetup extends ActivityBilling implements FragmentManager.On
                 jexport.put("answers", janswers);
                 jexport.put("settings", jsettings);
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
-                    jexport.put("channels", ((ApplicationEx) getApplication()).channelsToJSON());
+                    jexport.put("channels", ApplicationEx.channelsToJSON(context));
 
                 ContentResolver resolver = context.getContentResolver();
                 DocumentFile file = DocumentFile.fromSingleUri(context, uri);
@@ -755,7 +755,7 @@ public class ActivitySetup extends ActivityBilling implements FragmentManager.On
                     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
                         if (jimport.has("channels")) {
                             JSONArray jchannels = jimport.getJSONArray("channels");
-                            ((ApplicationEx) getApplication()).channelsFromJSON(jchannels);
+                            ApplicationEx.channelsFromJSON(context, jchannels);
                         }
 
                     db.setTransactionSuccessful();

app/src/main/java/eu/faircode/email/ApplicationEx.java

@@ -127,10 +127,10 @@ public class ApplicationEx extends Application {
     }
 
     @RequiresApi(api = Build.VERSION_CODES.O)
-    public JSONArray channelsToJSON() throws JSONException {
+    static JSONArray channelsToJSON(Context context) throws JSONException {
         JSONArray jchannels = new JSONArray();
 
-        NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+        NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
         for (NotificationChannel channel : nm.getNotificationChannels())
             if (!DEFAULT_CHANNEL_NAMES.contains(channel.getId())) {
                 JSONObject jchannel = new JSONObject();
@@ -163,8 +163,8 @@ public class ApplicationEx extends Application {
     }
 
     @RequiresApi(api = Build.VERSION_CODES.O)
-    public void channelsFromJSON(JSONArray jchannels) throws JSONException {
-        NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+    static void channelsFromJSON(Context context, JSONArray jchannels) throws JSONException {
+        NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
         for (int c = 0; c < jchannels.length(); c++) {
             JSONObject jchannel = (JSONObject) jchannels.get(c);
 
@@ -189,7 +189,7 @@ public class ApplicationEx extends Application {
 
                 if (jchannel.has("sound") && !jchannel.isNull("sound")) {
                     Uri uri = Uri.parse(jchannel.getString("sound"));
-                    Ringtone ringtone = RingtoneManager.getRingtone(this, uri);
+                    Ringtone ringtone = RingtoneManager.getRingtone(context, uri);
                     if (ringtone != null)
                         channel.setSound(uri, Notification.AUDIO_ATTRIBUTES_DEFAULT);
                 }