How to resume Android Activity programmatically from background

Question

Situation:

1. Let\'s say I have currently working launched application Activity A.
2. After some time I am pressing \"Home\" button. Application A goes to b

Answer 1

If your activities are on different tasks, you can use this to bring the activity's task to foreground:

ActivityManager activityManager = (ActivityManager) getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE); 
activityManager.moveTaskToFront(getTaskId(), ActivityManager.MOVE_TASK_NO_USER_ACTION);

You would need android.permission.REORDER_TASKS in order to do so. It works even in Android M, however getting an intent from a service works better in some cases.