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Android application crashes when push is received and application is closed

I am developing an application for Android and iOS with a corridor. The current version is 2.2.0. I have the following Java code to show Push Notification:

private void putNotification(String title, String message){ try{ Log.w("Push", "putNotification"); MainActivity context = MainActivity.getAppContext(); Log.w("Push", "context is set"); NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); Log.w("Push", "notificationManager is set"); Notification note = new Notification(R.drawable.icon, title, System.currentTimeMillis()); Intent notificationIntent = new Intent(context, MainActivity.class); notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP); PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0); note.setLatestEventInfo(context, title, message, pendingIntent); note.defaults |= Notification.DEFAULT_SOUND; note.defaults |= Notification.DEFAULT_VIBRATE; note.defaults |= Notification.DEFAULT_LIGHTS; note.flags |= Notification.FLAG_AUTO_CANCEL; notificationManager.notify(0, note); } catch(Exception e){ Log.w("Push failed", e); } }

When the application runs in the background, the code works fine. But if the application is completely closed, I get the following LogCat errors and not a single click is displayed:

  09-23 16:30:24.725: W/Push(3276): putNotification 09-23 16:30:24.725: W/Push(3276): context is set 09-23 16:30:24.725: W/Push failed(3276): java.lang.NullPointerException 09-23 16:30:24.725: W/Push failed(3276): at ch.seika.lakers.GCMIntentService.putNotification(GCMIntentService.java:105) 09-23 16:30:24.725: W/Push failed(3276): at ch.seika.lakers.GCMIntentService.onMessage(GCMIntentService.java:46) 09-23 16:30:24.725: W/Push failed(3276): at com.google.android.gcm.GCMBaseIntentService.onHandleIntent(GCMBaseIntentService.java:223) 09-23 16:30:24.725: W/Push failed(3276): at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65) 09-23 16:30:24.725: W/Push failed(3276): at android.os.Handler.dispatchMessage(Handler.java:99) 09-23 16:30:24.725: W/Push failed(3276): at android.os.Looper.loop(Looper.java:137) 09-23 16:30:24.725: W/Push failed(3276): at android.os.HandlerThread.run(HandlerThread.java:61)

Line 105 is as follows: NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

I really can't tell where the Null Pointer Exception comes from, so any hint would be much appreciated.

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1 answer

in your java.lang.NullPointerException code, an exception is thrown due to null context.

so use the context that is passed in the onMessage method

  protected void onMessage(final Context context, Intent intent)

use this context in your GCMIntentService class

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