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Android: Check whether activity is in stack or not.

Solution
There's possibility to check current tasks and their stack using ActivityManager.
So, to determine if an activity is the last one:
  • request android.permission.GET_TASKS permissions in the manifest.
  • Use the following code:
ActivityManager mngr = (ActivityManager) getSystemService( ACTIVITY_SERVICE ); 
List<ActivityManager.RunningTaskInfo> taskList = mngr.getRunningTasks(10); if(taskList.get(0).numActivities == 1 && taskList.get(0).topActivity.getClassName().equals(this.getClass().getName())) { 
           Log.i(TAG, "This is last activity in the stack"); 
}
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