在Android中雙擊事件

Question

我需要點擊雙擊屏幕上的東西。我試了下面的代碼。但它不起作用。雙擊不會吐司。這些代碼有什麼問題？

package a.b.c; 

import android.app.Activity; 
import android.os.Bundle; 
import android.view.GestureDetector.OnDoubleTapListener; 
import android.view.GestureDetector.OnGestureListener; 
import android.view.MotionEvent; 
import android.widget.Toast; 



public class SampleActivity extends Activity implements OnDoubleTapListener,OnGestureListener 
{ 
     @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
    } 

    @Override 
    public boolean onDoubleTap(MotionEvent e) { 
     if(e.getAction()==1) 
     { 
     Toast.makeText(getBaseContext(), "onDoubleTap", Toast.LENGTH_LONG).show(); 
     } 
     return true; 
    } 

    @Override 
    public boolean onDoubleTapEvent(MotionEvent e) { 
     if(e.getAction()==1) 
     { 
     Toast.makeText(getBaseContext(), "onDoubleTapEvent", Toast.LENGTH_LONG).show(); 
     } 
     return true; 
    } 

    @Override 
    public boolean onSingleTapConfirmed(MotionEvent e) { 
     if(e.getAction()==1) 
     { 
     Toast.makeText(getBaseContext(), "onSingleTapConfirmed", Toast.LENGTH_LONG).show(); 
     } 
     return true; 
    } 

我也實現了OnGestureListener方法。但沒有效果。請幫忙。

Answer 1

你在哪裏設置雙向監聽器？嘗試將此添加到您的oncreate，看看它是否修復問題

GestureDetector detector = new GestureDetector(this, this);