Launch application when GCM notification received

Question

I have GCM notification implementation. I know that the client application receives the notification whether it is in the foreground, background or killed state. What I would like to know is, how can I launch my application on notification received, when the application is in the killed state?

Answer 1

In the message receiver, I do the following:

final Intent notificationIntent = new Intent(context, YourActivity.class);
notificationIntent.setAction(Intent.ACTION_MAIN);
notificationIntent.addCategory(Intent.CATEGORY_LAUNCHER);

Here replace YourActivity.class with the entry activity. This worked for me.

Answer 2

you Can Use NotificationManager to Start your activity.

try to use Below Code Inside your onMessage() method Which is overridden method in Class that extends GCMBaseIntentService class of GCM.

int icon = R.drawable.your_app_icon;
        long when = System.currentTimeMillis();
        NotificationManager notificationManager = (NotificationManager) context
                .getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notification = new Notification(icon, message, when);
        String title = context.getString(R.string.app_name);

        Intent notificationIntent = new Intent(context, YOUR_ACTIVITY.class);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        // notificationIntent.putExtra("PostName", vPostText);
        // Log.i(TAG, "Sent Postid " + postid);

        // Util util = (Util) context.getApplicationContext();
        // util.setPostID(postid);
        // util.setNotify(true);
        // util.setUserNAME(vPortCode);
        // util.setPostNAME(vPostText);
        // util.setmEDIA(vMedia);
        // util.setmEDIATHHUMB(vMediaThumb);
        // util.setmEDIATYPE(vMediaType);
        // util.setAirportName(vAirportName);

        notificationIntent.putExtra("Set_image", true);
        notificationIntent.putExtra("Notify", true);

        // set intent so it does not start a new activity
        // notificationIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        // notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        // notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
        // | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent intent = PendingIntent.getActivity(context,
                (int) System.nanoTime(), notificationIntent, 0);

        notification.setLatestEventInfo(context, title, message, intent);
        notification.defaults |= Notification.DEFAULT_SOUND;
        notification.flags |= Notification.FLAG_AUTO_CANCEL;
        notificationManager.notify((int) System.nanoTime(), notification);