拖放时的android滚动

Question

嗨,我正在尝试拖放ListView.它很棒.但我失去了点击和滚动的能力.我如何保留这两个？我认为长按该项目而不是正常按下时会发生拖放.这是我的onTouch,它位于扩展ListView的MyListView中

@Override
    public boolean onTouchEvent(MotionEvent ev) {
        final int action = ev.getAction();
        final int x = (int) ev.getX();
        final int y = (int) ev.getY();  

        if (action == MotionEvent.ACTION_DOWN && x < this.getWidth()/4) {
            this._dragMode = true;
        }

        if (!this._isDragNDrop) 
            return super.onTouchEvent(ev);

        switch (action) {
            case MotionEvent.ACTION_DOWN:
                this._startPosition = pointToPosition(x,y);
                if (this._startPosition != INVALID_POSITION) {
                    int mItemPosition = this._startPosition - getFirstVisiblePosition();
                    this._dragPointOffset = y - getChildAt(mItemPosition).getTop();
                    this._dragPointOffset -= ((int)ev.getRawY()) - y;
                    startDrag(mItemPosition,y);
                    drag(x,y);
                }   
                break;
            case MotionEvent.ACTION_MOVE:
                drag(x,y);
                break;
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
            default:
                this._dragMode = false;
                //_isDragNDrop = false;
                this._endPosition = pointToPosition(x,y);
                stopDrag(this._startPosition - getFirstVisiblePosition());
                if (this._dropListener != null && this._startPosition != INVALID_POSITION && this._endPosition != INVALID_POSITION) 
                    this._dropListener.onDrop(this._startPosition, this._endPosition);
                break;
        }
        return true;
    }

Answer 1

我刚刚在我的应用程序中实现了拖放列表视图,通过长按项目开始拖动.

源代码在GitHub上:DraggableListView,我有一个博客文章来描述它.希望它能帮到你.