Question

我创建了一个CustomListView，它包含覆盖方法dispatchTouchEvent，返回false如下所示

我需要区分点击，长按和双击。？

@Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN || ev.getAction() == MotionEvent.ACTION_POINTER_DOWN) {
            getParent().requestDisallowInterceptTouchEvent(true);
        }

        if (ev.getAction() == MotionEvent.ACTION_UP || ev.getAction() == MotionEvent.ACTION_POINTER_UP) {
            getParent().requestDisallowInterceptTouchEvent(false);
        }
        return false;
    }

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

    final GestureDetector gestureDetector = (new GestureDetector(new GestureDetector.SimpleOnGestureListener() {


        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
            getParent().requestDisallowInterceptTouchEvent(true);
            return false;
        }

        @Override
        public void onLongPress(MotionEvent e) {
            super.onLongPress(e);
            Log.e("test", "Long press detected");
        }


        @Override
        public boolean onDoubleTap(MotionEvent e) {
            Log.e("test", "Double Tab detected");
            return super.onDoubleTap(e);
        }
    }));

提供建议。

Answer 1

在将onTouchListener设置为视图之前声明您的gestureDetector。您还必须在onTouchEvent中提供gestureListener，如下所示：

 final GestureDetector.SimpleOnGestureListener simpleOnGestureListener = new GestureDetector.SimpleOnGestureListener() {
        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
             ...
        } //etc
    }

 viewHolder.itemView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            return gestureDetector.onTouchEvent(event, simpleOnGestureListener);
        }
    });

android CustomView使用Gesture区分事件，dispatchTouchEvent总是返回false

1 个答案: