RecyclerView onDoubleClick和onClick

Question

在阅读了雅各布在RecyclerView onClick question上的解决方案后，我尝试在“双击”事件中扩展他的解决方案。当我将回收器视图注册到单击和双击侦听器时，onDoubleClick()被正确调用，但当用户双击时也会调用onClick()，这是我想要避免的。我希望如果检测到双击事件，则不会检测到单击事件。

下面是我的双击监听器的代码，改编自雅各布的解决方案：

 public class RecyclerItemDoubleClickListener implements RecyclerView.OnItemTouchListener {
    private OnItemDoubleClickListener doubleClickListener;

    public interface OnItemDoubleClickListener {
        public void onItemDoubleClick(View view, int position);
    }

    GestureDetector mGestureDetector;

    public RecyclerItemDoubleClickListener(Context context, OnItemDoubleClickListener listener) {
        doubleClickListener = listener;
        mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
            @Override public boolean onDoubleTap(MotionEvent e) {
                return true;
            }
        });
    }

    @Override public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
        View childView = view.findChildViewUnder(e.getX(), e.getY());
        if (childView != null && doubleClickListener != null && mGestureDetector.onTouchEvent(e)) {
            doubleClickListener.onItemDoubleClick(childView, view.getChildPosition(childView));
        }
        return false;
    }

    @Override public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) { }
}

我只是简单地注册如下：

    recyclerView.addOnItemTouchListener(new RecyclerItemDoubleClickListener(
            this, new RecyclerItemDoubleClickListener.OnItemDoubleClickListener() {
        @Override
        public void onItemDoubleClick(View view, int position) {
            Toast.makeText(ActivityMain.this, "double click " + position, Toast.LENGTH_SHORT).show();
        }
    }));

    recyclerView.addOnItemTouchListener(new RecyclerItemClickListener(
            this, new RecyclerItemClickListener.OnItemClickListener() {
        @Override
        public void onItemClick(View view, int position) {
            Toast.makeText(ActivityMain.this, "single click " + position, Toast.LENGTH_SHORT).show();
        }
    }));

你会怎么处理这件事？

PS :我也想检测"longClick"，“向左滑动”，“向右滑动”在同一回收查看项目独立。但是我想我自己写的代码可能太多了。我将等待图书馆或谷歌提供它。

Answer 1

使用GestureListener的onSingleTapConfirmed()方法来区分singleTap和DoubleTap。

http://developer.android.com/reference/android/view/GestureDetector.SimpleOnGestureListener.html#onSingleTapConfirmed%28android.view.MotionEvent%29

要检测左右滑动，请使用GestureListener的onFling()

在onFling中使用以下代码

if(motionEvent.getX() - motionEvent.getX() > SWIPE_MIN_DISTANCE ) { onSwipeRightToLeft(); } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE ) { onSwipeLeftToRight(); }

Answer 2

您可以使用ItemTouchHelper向RecyclerView添加swipe以解除和拖放支持。