Question

我正在尝试在RelativeLayout中向左或向右滑动。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;

    }
}

我在做错了什么？如果有人知道解决方案，请帮助我感谢

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个代码，所以一切都应该正常。但请告诉我是否有遗漏并且无效。

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;
         }
     });

Answer 2

试试这会对你有帮助....

OnSwipeTouchListener.java ：

import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

public class OnSwipeTouchListener implements OnTouchListener {

    private final GestureDetector gestureDetector;

    public OnSwipeTouchListener (Context ctx){
        gestureDetector = new GestureDetector(ctx, new GestureListener());
    }

    private final class GestureListener extends SimpleOnGestureListener {

        private static final int SWIPE_THRESHOLD = 100;
        private static final int SWIPE_VELOCITY_THRESHOLD = 100;

        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            boolean result = false;
            try {
                float diffY = e2.getY() - e1.getY();
                float diffX = e2.getX() - e1.getX();
                if (Math.abs(diffX) > Math.abs(diffY)) {
                    if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffX > 0) {
                            onSwipeRight();
                        } else {
                            onSwipeLeft();
                        }
                    }
                } else {
                    if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffY > 0) {
                            onSwipeBottom();
                        } else {
                            onSwipeTop();
                        }
                    }
                }
            } catch (Exception exception) {
                exception.printStackTrace();
            }
            return result;
        }
    }

    public void onSwipeRight() {
    }

    public void onSwipeLeft() {
    }

    public void onSwipeTop() {
    }

    public void onSwipeBottom() {
    }
}

用法：

imageView.setOnTouchListener(new OnSwipeTouchListener() {
    public void onSwipeTop() {
        Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show();
    }
    public void onSwipeRight() {
        Toast.makeText(MyActivity.this, "right", Toast.LENGTH_SHORT).show();
    }
    public void onSwipeLeft() {
        Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show();
    }
    public void onSwipeBottom() {
        Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show();
    }

public boolean onTouch(View v, MotionEvent event) {
    return gestureDetector.onTouchEvent(event);
}
});

Android在RelativeLayout中左右滑动

2 个答案: