使用服务的手势检测器

Question

我希望使用服务而不是活动来实现GestureDetector。该代码适用于活动，但不适用于服务。在Service我不能@OverrideonTouchEvent(MotionEvent e)方法 - 这是问题的原因？

public class GestureService extends Service implements OnGestureListener { 

private GestureDetector gestureScanner; 

@Override 
public IBinder onBind(Intent intent) { 
    // TODO Auto-generated method stub 
    return null; 
} 
@Override 
public void onCreate() { 
    super.onCreate();  
    Toast.makeText(getBaseContext(),"onCreate", Toast.LENGTH_SHORT).show(); 
    gestureScanner = new GestureDetector(this); 
} 


@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
    Toast.makeText(getBaseContext(),"onStartCommand", Toast.LENGTH_SHORT).show(); 
    return START_STICKY; 

} 

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

@Override 
public boolean onDown(MotionEvent e) { 
    // TODO Auto-generated method stub 
    Toast.makeText(getBaseContext(),"onDown", Toast.LENGTH_SHORT).show(); 
    return false; 
} 
@Override 
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, 
     float velocityY) { 
    // TODO Auto-generated method stub 
    return false; 
} 
@Override 
public void onLongPress(MotionEvent e) { 
    // TODO Auto-generated method stub 

} 
@Override 
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, 
     float distanceY) { 
    // TODO Auto-generated method stub 
    return false; 
} 
@Override 
public void onShowPress(MotionEvent e) { 
    // TODO Auto-generated method stub 

} 
@Override 
public boolean onSingleTapUp(MotionEvent e) { 
    Toast.makeText(getBaseContext(),"onSingleTapUp", Toast.LENGTH_SHORT).show(); 
    // TODO Auto-generated method stub 
    return false; 
} 

}

我使用startService(new Intent(this,GestureService.class));

Answer 1

我猜你想成为一个服务，这样你可以用它为所有应用程序的活动类开始服务。但从阅读this article来看，它确实不是它的工作方式：手势是特定于应用程序的。