Android在RelativeLayout中左右滑动

Question

我正在尝试在我的 RelativeLayout 中实现向左或向右滑动。我写了一些代码，但无法向左或向右滑动。我正在使用 GestureDetector这是我的来源

private GestureDetector gesturedetector = null;
private RelativeLayout swipelayout;

@SuppressLint("UseValueOf")
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.strada_menu_result_loadmore,
            container, false);


    swipelayout = (RelativeLayout) rootView.findViewById(R.id.swipelayout);

    gesturedetector = new GestureDetector(new MyGestureListener());
    swipelayout.setOnTouchListener(new OnTouchListener() {

        @Override

        public boolean onTouch(View v, MotionEvent event) {

        gesturedetector.onTouchEvent(event);

        return true;

        }

        });




    return rootView;

}


public boolean dispatchTouchEvent(MotionEvent ev){



    return gesturedetector.onTouchEvent(ev);
}



class MyGestureListener extends GestureDetector.SimpleOnGestureListener {

    private static final int SWIPE_MIN_DISTANCE = 150;

    private static final int SWIPE_MAX_OFF_PATH = 100;

    private static final int SWIPE_THRESHOLD_VELOCITY = 100;

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {

        float dX = e2.getX() - e1.getX();

        float dY = e1.getY() - e2.getY();

        if (Math.abs(dY) >= SWIPE_THRESHOLD_VELOCITY
                && Math.abs(velocityX) >= SWIPE_THRESHOLD_VELOCITY &&

                Math.abs(dX) >= SWIPE_MIN_DISTANCE) {

            if (dX > 0) {

                Toast.makeText(getActivity(), "Right Swipe",
                        Toast.LENGTH_SHORT).show();

            } else {

                Toast.makeText(getActivity(), "Left Swipe",
                        Toast.LENGTH_SHORT).show();

            }

            return true;

        }
        return false;

    }
}

我做错了什么？如果有人知道解决方案请帮助我谢谢

Answer 1

你只需要一个 OnTouchListener，这应该是简单的答案。看一看。我在一些工作项目中使用了这段代码，所以一切都应该工作正常。但是，如果缺少某些内容并且不起作用，请告诉我。

yourRelativeLayout.setOnTouchListener(new OnTouchListener() {

    int downX, upX;

     @Override
     public boolean onTouch(View v, MotionEvent event) {

         if (event.getAction() == MotionEvent.ACTION_DOWN) {
             downX = (int) event.getX(); 
             Log.i("event.getX()", " downX " + downX);
             return true;
         } 

         else if (event.getAction() == MotionEvent.ACTION_UP) {
             upX = (int) event.getX(); 
             Log.i("event.getX()", " upX " + upX);
             if (upX - downX > 100) {

                 // swipe right
             } 

             else if (downX - upX > -100) {

                 // swipe left
             }
             return true;

             }
             return false;
         }
     });