MotionEvent.ACTION_DOWN not being called even though I return true for it

Question

I have an onTouchListener for my LinearLayout of ListViews and I am trying to use the ACTION_DOWN and ACTION_UP data to detect when a user has swiped to the next ListView. However, the MotionEvent never equals ACTION_DOWN, although ACTION_UP works perfectly. After a lot of googling, the only solution I could find is to return true when the event is called, but I was already doing that. Here is my onTouchListener code

View.OnTouchListener mTouchListener = new View.OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                downX = event.getX();
                return true;
            } else if (event.getAction() == MotionEvent.ACTION_UP) {
                upX = event.getX();
                if(userSwipedFarEnough)
                    doStuff()
                return true;
            }
            return false;

        }

    };

Answer 1

I figured out what was happening, the scrollview for my listview was somehow stealing the action_down so it wasn't being called. I realized it when I had an empty listview and the scrolling worked.