Question

我想让ListView拦截除SingleTap之外的所有事件。

首先我做了下面的代码

  private float startX;
    private float startY;

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
         if (event.getAction() == MotionEvent.ACTION_DOWN ) {
             Log.d("intercept", "down");
            startX = event.getX();
            startY = event.getY();


        }
        if (event.getAction() == MotionEvent.ACTION_UP) {
             Log.d("intercept", "up");
            float deltaX = Math.abs(event.getX() - startX);
            float deltaY = Math.abs(event.getY() - startY);
            if(deltaX<5 && deltaY<5){

                return false;
            }

        }

       return super.onInterceptTouchEvent(event);
    }

有了这个，我能够看到我真的在LogCat上检测到singleTap（intercept-down和intercep-up），但它阻止我的列表来处理其他动作。之后，我将return super.onInterceptTouchEvent(event);更改为return true，这对其余的动作都有效。问题是我现在无法检测到singleTap。我可以在Logcat上看到intercept-down，但不是intercept-up。我已经尝试了另一个代码，但也没有。

import android.content.Context;
import android.support.v4.view.GestureDetectorCompat;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.ListView;


public class SwipeListView extends ListView  {
    Context context;
    private GestureDetectorCompat mDetector;
    public SwipeListView(Context context) {
        super(context);
    }

    public SwipeListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SwipeListView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public void setContext(Context context){
        this.context= context;
        mDetector = new GestureDetectorCompat(context, new MyGestureListener());
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        return !onTouchEvent(event);
    }
    @Override
    public boolean onTouchEvent(MotionEvent e) {
        return mDetector.onTouchEvent(e);
    }

    class MyGestureListener extends GestureDetector.SimpleOnGestureListener {
        private static final String DEBUG_TAG = "Gestures";

        @Override
        public boolean onDown(MotionEvent event) {
            Log.e(DEBUG_TAG,"onDown: " + event.toString());
            return true;
        }

        @Override
        public boolean onSingleTapConfirmed(MotionEvent event) {
            Log.e(DEBUG_TAG, "onSingleTap: " + event.toString());
            return true;
        }
    }
}

任何人都可以帮我正确检测singleTap吗？

Answer 1

同时，尝试使用您的代码您是否尝试过：通过以下方式向下/向上返回true：

public boolean onTouchEvent(MotionEvent e) {
    return gestureScanner.onTouchEvent(e);
}

public boolean onSingleTapConfirmed(MotionEvent e) { 

   //this works for me

    return true; 
}

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


public void onLongPress(MotionEvent e) {
    //

}

如何在onInterceptTouchEvent（MotionEvent）上检测SingleTap？

1 个答案: