Question

I sent a task (activity) to back with:

    @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    moveTaskToBack(true);
}

but I need bring it to front by setOnClickPendingIntent in widget.

Answer 1

Just start the main (root) activity of your application like this:

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

If the activity is already running in a task, this will just bring that task to the foreground (without creating any new instances of the activity). If the activity is not already running, then this will start a new task with that activity at the root.