按钮按住不放和松开

     nextBtn.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if (event.getAction() == MotionEvent.ACTION_DOWN) {
                    nextBtn.setBackgroundResource(R.drawable.gender_next_btn_selected);
                } else if (event.getAction() == MotionEvent.ACTION_UP) {
                    callback.nextBtnClick();
                }
                return false;
            }
        });