TOUCHLISTENER - SU KIEN CHAM NGON TAY VAO DOI TUONG

imvBackActionBar.setOnTouchListener(new View.OnTouchListener() {
    @Override    

        public boolean onTouch(View v, MotionEvent event) {
        //imvBackActionBar.setBackgroundColor(Color.parseColor("#FF6E9BF5"));
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN: {
                ImageView view = (ImageView) v;
                //overlay is black with transparency of 0x77 (119)                

                view.getDrawable().setColorFilter(0x77000000, PorterDuff.Mode.SRC_ATOP);
                imvBackActionBar.setBackgroundColor(Color.parseColor("#FF6E9BF5"));
                view.invalidate();
                break;
            }
            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL: {
                ImageView view = (ImageView) v;
                //clear the overlay                

                view.getDrawable().clearColorFilter();
                imvBackActionBar.setBackgroundColor(Color.parseColor("#2b6bec"));
                view.invalidate();
                break;
            }
        }
        return false;
    }
});