Recycleview的点击事件

public class RecyclerViewClickListener implements RecyclerView.OnItemTouchListener {

private int mLastDownX,mLastDownY;
//该值记录了最小滑动距离
private int touchSlop ;
private OnItemClickListener mListener;
//是否是单击事件
private boolean isSingleTapUp = false;
//是否是长按事件
private boolean isLongPressUp = false;
private boolean isMove = false;
private long mDownTime;

//内部接口，定义点击方法以及长按方法
public interface OnItemClickListener {
void onItemClick(View view, int position);

void onItemLongClick(View view, int position);
}

public RecyclerViewClickListener(Context context,OnItemClickListener listener){
touchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
mListener = listener;
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
int x = (int) e.getX();
int y = (int) e.getY();
switch (e.getAction()){
/**
*  如果是ACTION_DOWN事件，那么记录当前按下的位置，
*  记录当前的系统时间。
*/
case MotionEvent.ACTION_DOWN:
mLastDownX = x;
mLastDownY = y;
mDownTime = System.currentTimeMillis();
isMove = false;
break;
/**
*  如果是ACTION_MOVE事件，此时根据TouchSlop判断用户在按下的时候是否滑动了，
*  如果滑动了，那么接下来将不处理点击事件
*/
case MotionEvent.ACTION_MOVE:
if(Math.abs(x - mLastDownX)>touchSlop || Math.abs(y - mLastDownY)>touchSlop){
isMove = true;
}
break;
/**
*  如果是ACTION_UP事件，那么根据isMove标志位来判断是否需要处理点击事件；
*  根据系统时间的差值来判断是哪种事件，如果按下事件超过1ms，则认为是长按事件，
*  否则是单击事件。
*/
case MotionEvent.ACTION_UP:
if(isMove){
break;
}
if(System.currentTimeMillis()-mDownTime > 1000){
isLongPressUp = true;
}else {
isSingleTapUp = true;
}
break;
}
if(isSingleTapUp ){
//根据触摸坐标来获取childView
View childView = rv.findChildViewUnder(e.getX(),e.getY());
isSingleTapUp = false;
if(childView != null){
//回调mListener#onItemClick方法
mListener.onItemClick(childView,rv.getChildLayoutPosition(childView));
return true;
}
return false;
}
if (isLongPressUp ){
View childView = rv.findChildViewUnder(e.getX(),e.getY());
isLongPressUp = false;
if(childView != null){
mListener.onItemLongClick(childView, rv.getChildLayoutPosition(childView));
return true;
}
return false;
}
return false;
}

@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {

}

@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

}
}

//调用RecyclerView#addOnItemTouchListener方法能添加一个RecyclerView.OnItemTouchListener对象
mRecyclerView.addOnItemTouchListener(new RecyclerViewClickListener(this,new RecyclerViewClickListener.OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
Toast.makeText(MainActivity.this,"Click "+mData.get(position),Toast.LENGTH_SHORT).show();
}

@Override
public void onItemLongClick(View view, int position) {
Toast.makeText(MainActivity.this,"Long Click "+mData.get(position),Toast.LENGTH_SHORT).show();
}
}));