如何实现Android动态壁纸的双击？

Question

我想为Android动态壁纸实现双击事件.可悲的是,我找不到任何具体的代码如何做到这一点.

目前我发现了使用Engine-class的onTouchEvent方法的workarround:

public void onTouchEvent(MotionEvent event) {
  long time = android.os.SystemClock.currentThreadTimeMillis();

  if(((time - mLastTouchTime) < 500) && ((time - mLastTouchTime) > 100))
  {
    if(!mIsPlayed && mSound)
      {
        mIsPlayed = true;
        int sound = R.raw.hell;
        if(mTheme.equals("rose"))
          sound = R.raw.rose;
        if(mTheme.equals("greed"))
          sound = R.raw.greed;

        MediaPlayer mp = MediaPlayer.create(getBaseContext(), sound);   
          mp.start();
          mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
      @Override
      public void onCompletion(MediaPlayer mp) {
        // TODO Auto-generated method stub
        mp.release();
        mIsPlayed = false;
      }
    });
      }
  }

  mLastTouchTime = time;
  super.onTouchEvent(event);
}

嗯,这不是一个优雅的解决方案.我知道有些壁纸实现了双击.但我不知道,如何自己做.

所以在正确的方向上"轻拍"会很好.如果有必要,我会接受"双击".:d

问候,罗伯特

Answer 1

使用http://developer.android.com/reference/android/view/GestureDetector.html

例如:

public class AndroidTestActivity extends Activity {

    private GestureDetector gestureDetector;

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return gestureDetector.onTouchEvent(event);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        gestureDetector = new GestureDetector(new GestureDetector.SimpleOnGestureListener(){
            @Override
            public boolean onDoubleTap(MotionEvent e) {
                Log.e("onDoubleTap", e.toString());
                //handle double tap
                return true;
            }
        });
    }
}