我想显示一些文本onDoubleClick事件，该怎么做？我已经附上了我的源码

Question

我想在一个文本字段上应用一个doubleClick事件，它在双击事件上显示一些文本，但它一直给我错误，有没有什么方法可以简单地做到这一点

TextView tv;
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    tv = (TextView) findViewById(R.id.mytext);
    tv.setOnTouchListener(new OnDoubleTapListener() {
                              @Override
                              public boolean onSingleTapConfirmed(MotionEvent e) {
                                  return true;
                              }

                              @Override
                              public boolean onDoubleTap(MotionEvent e) {
                                  tv.setText("DoubleTouch");
                                  return true;
                              }

                              @Override
                              public boolean onDoubleTapEvent(MotionEvent e) {
                                  tv.setText("Double Touch ");
                                  return true;
                              }
                          }

    );
}

Answer 1

您应该像这样初始化手势检测器

  GestureDetector gd = new GestureDetector(this, new GestureDetector.OnGestureListener() {
        @Override
        public boolean onDown(MotionEvent motionEvent) {
            return false;
        }

        @Override
        public void onShowPress(MotionEvent motionEvent) {

        }

        @Override
        public boolean onSingleTapUp(MotionEvent motionEvent) {
            return false;
        }

        @Override
        public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
            return false;
        }

        @Override
        public void onLongPress(MotionEvent motionEvent) {

        }

        @Override
        public boolean onFling(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
            return false;
        }
    });

然后双击listener，如下所示

  gd.setOnDoubleTapListener(new GestureDetector.OnDoubleTapListener() {
        @Override
        public boolean onSingleTapConfirmed(MotionEvent motionEvent) {
            return false;
        }

        @Override
        public boolean onDoubleTap(MotionEvent motionEvent) {
            return false;
        }

        @Override
        public boolean onDoubleTapEvent(MotionEvent motionEvent) {
            return false;
        }
    });

最后，将侦听器应用于视图，如下所示

  tv.setOnTouchListener(new View.OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        // TODO Auto-generated method stub
        gd.onTouchEvent(event);
        return false;
    }
});

有关更多信息，请参阅Android文档Detect Common gestures