Android意向-未恢复活动

Question

I'm having trouble resuming an activity.

Here's what happening:

Activity A calls activity B :

Intent intent = new Intent(A.this, B.class);
startActivity(intent);

Then Activity B Sets a Notification and calls Activity A:

Intent intent = new Intent(this, MrpCastPlayerActivity.class);
intent.setAction(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);

PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
        intent, 0);

    android.support.v4.app.NotificationCompat.Builder notif = new NotificationCompat.Builder(this);
    notif.setContentIntent(pendingIntent)
            .setWhen(System.currentTimeMillis())
            .setSmallIcon(R.drawable.ic_launcher)
            .setContentTitle("TITLE")
            .setContentText("CONTENT")
            .setAutoCancel(true);
    notif.setOngoing(true);
  Notification notification = notif.build();
  NotificationManager notificationmanager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

      notificationmanager.notify(0, notification);
      Intent intent2 = new Intent(B.this, A.class);
      startActivity(intent2);

The problem is when I tap the notification it opens Activity B but it does't call the onResume it calls onCreate . If I use moveTaskToBack(true) , instead of starting intent2 , onResume is called. It seems that Activity B is finished when I use intent2 to open Activity A .
Is there a away to avoid this ?

Answer 1

To resume your activity, you should considering adding flags to your Intent .

do nothing inside the method onResume() and onstart() when coming back to this activity, Try this

 intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 

Manifest Changes:

<activity android:name=".MyActivity"

              android:configChanges="keyboardHidden|orientation">

Hope this helps