How to get the foreground activity instance?

问题

I want to create an service app which sends screen-touch events timely to foregound activity. The foregound activity is probably a 3pp application.

My codes:

public void myClickEvent(float x, float y) {
    long firstTime = SystemClock.uptimeMillis();
    final MotionEvent firstEvent = MotionEvent.obtain(firstTime, firstTime,
            MotionEvent.ACTION_DOWN, x, y, 0);

    long secondTime = firstTime + 100;
    final MotionEvent secondEvent = MotionEvent.obtain(secondTime,
            secondTime, MotionEvent.ACTION_UP, x, y, 0);

    dispatchTouchEvent(firstEvent);
    dispatchTouchEvent(secondEvent);
}

But Service has no dispatchTouchEvent() as Activity has. The only way is to get the foreground activity instance in my service. How to do it? Thanks a lot for your suggestion.

回答1:

You can: 1. Catch the event in your activity A. 2. Send data to activity B. You can use BroadcastReceiver.

If you need to send broadcasts across applications: http://developer.android.com/reference/android/content/BroadcastReceiver.html

来源：https://stackoverflow.com/questions/16783359/how-to-get-the-foreground-activity-instance