Updates for SDK >= 31

Author: jq-rs

src/android/BackgroundMode.java

@@ -18,7 +18,6 @@ Licensed to the Apache Software Foundation (ASF) under one
  specific language governing permissions and limitations
  under the License.
  */
-
 package de.appplant.cordova.plugin.background;
 
 import android.app.Activity;
@@ -58,7 +57,7 @@ private enum Event { ACTIVATE, DEACTIVATE, FAILURE }
     private static JSONObject defaultSettings = new JSONObject();
 
     // Service that keeps the app awake
-    private ForegroundService service;
+    private ForegroundService service = null;
 
     // Used to (un)bind the service to with the activity
     private final ServiceConnection connection = new ServiceConnection()
@@ -223,7 +222,7 @@ static JSONObject getSettings () {
      */
     private void updateNotification(JSONObject settings)
     {
-        if (isBind) {
+        if (isBind && service != null) {
             service.updateNotification(settings);
         }
     }

src/android/BackgroundModeExt.java

@@ -155,18 +155,27 @@ else if(1 == wakeCounter) {
 				alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
 
 				Intent newIntent = new Intent(RECEIVER);
+				int flags = 0;
+				if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+					flags = flags | PendingIntent.FLAG_IMMUTABLE;
+				}
 
-				alarmIntent = PendingIntent.getBroadcast(context, 0, newIntent, 0);
+				alarmIntent = PendingIntent.getBroadcast(context, 0, newIntent, flags);
 				alarmMgr.setExactAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 						SystemClock.elapsedRealtime() + timeout, alarmIntent);
 			}
 			catch(Exception e) {
+				int flags = 0;
+				if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+					flags = flags | PendingIntent.FLAG_IMMUTABLE;
+				}
+
 				Log.d("MlesTalk", "Got exception, no intent loaded, loading 60 s!");
 				alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
 
 				Intent newIntent = new Intent(RECEIVER);
 
-				alarmIntent = PendingIntent.getBroadcast(context, 0, newIntent, 0);
+				alarmIntent = PendingIntent.getBroadcast(context, 0, newIntent, flags);
 				alarmMgr.setExactAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 						SystemClock.elapsedRealtime() + 60*1000, alarmIntent);
 			}
@@ -289,8 +298,12 @@ private void disableWebViewOptimizations() {
 		context.registerReceiver(mReceiver, intentFilter);
 
 		Intent intent = new Intent(RECEIVER);
+		int flags = 0;
+		if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+			flags = flags | PendingIntent.FLAG_IMMUTABLE;
+		}
 
-		alarmIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
+		alarmIntent = PendingIntent.getBroadcast(context, 0, intent, flags);
 		alarmMgr.setExactAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 										   SystemClock.elapsedRealtime() + TIMEOUT, alarmIntent);