CODEWITHSUNDEEP
androidandroid-activityandroid-notificationsandroid-broadcast
user1163234
user1163234

Reputation: 2497

startActivity not working when calling from BroadcastReceiver

I have a notification and when I select, it sends a Broadcast to a BroadcastReceiver using a PendingIntent. In the onReceive I start a new Activity.

However, if I remove my app from recent apps opened (or the notification sit in the draw for a long time) this scenario occurs:

When I have multiple notifications in the drawer the first one opens great. After tapping on the second one my onCreate() nor my onResume() are being called and its as if the startActivity() is not working at all. If I add the flag Intent.FLAG_ACTIVITY_SINGLE_TOP then onNewIntent is being called.

notificationIntent = new Intent();
notificationIntent.setAction(AppConstants.ACTION_ACTIVITY);
notificationIntent.putExtra("key", value);
int requestID = (int) System.currentTimeMillis();

mBuilder.setContentIntent(PendingIntent
                    .getBroadcast(context, requestID, notificationIntent, 
                                  PendingIntent.FLAG_UPDATE_CURRENT));

onReceive

  Intent intent = new Intent(context, Activity.class);
  intent.putExtra("key", value);
  //IF I ADD FLAG_ACTIVITY_SINGLE_TOP IT WORKS
  intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
  context.startActivity(intent);

Upvotes: 12

Views: 9056

Answers (4)

Dmitriy Mitiai
Dmitriy Mitiai

Reputation: 1200

For someone, who will look for a similar question. Beginning from Android Q it's restricted to launch any activity, when app in background. To launch your activity, you need to displaying a notification with PRIORITY_HIGH and set the full-screen intent. So, totally you should have something like this:

//Create your intent as usual
Intent intent = new Intent(context, Activity.class);
intent.putExtra("key", value);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

// Build a pending intent 
PendingIntent pIntent = PendingIntent.getActivity(context, 0,
                intent, PendingIntent.FLAG_UPDATE_CURRENT);

//Notification builder
NotificationCompat.Builder notifyBuilder = new NotificationCompat.Builder(context, CHANNEL_ID)
                .setSmallIcon(R.drawable.ic_notification)
                .setContentTitle(title)
                .setPriority(PRIORITY_HIGH)
                .setFullScreenIntent(pIntent, true /*isHighPriority*/);

NotificationManager nManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nManager.notify(10, notifyBuilder.build())

This will display notification and will launch your activity immediately. And in your activity onStart() you can dismiss a notification like below:

NotificationManager nManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nManager.cancel(10);

NOTE: Don't forget to init channel. Beginning from Android O it's a mandatory thing

Upvotes: 7

Hussein Alrubaye
Hussein Alrubaye

Reputation: 925

in order to start activity from BroadcastReciever you should add flag of FLAG_ACTIVITY_NEW_TASK

 Intent imap =new Intent(context,MainActivity.class);
                  imap.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                  context.startActivity(imap);

Upvotes: 3

Roadblock
Roadblock

Reputation: 2071

Try using flags as follows for the intent.

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_MULTIPLE_TASK);

And for Pending intent use PendingIntent.FLAG_UPDATE_CURRENT

Upvotes: 16

Sajith Sageer
Sajith Sageer

Reputation: 173

An activity can be started from Broadcast Receiver even if it is not a launcher. That shouldn't be the problem.

Try passing a unique requestid,

notificationIntent = new Intent();
notificationIntent.setAction(AppConstants.ACTION_ACTIVITY);
notificationIntent.putExtra("key", value);

mBuilder.setContentIntent(PendingIntent.getBroadcast(context, value, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT));

See this question.

Upvotes: 1

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