RecyclerView的监听

来源：互联网发布：linux命令行创建进程编辑：程序博客网时间：2024/05/02 02:55
单独一个类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) {    }} 调用方法 mRecyclerView.addOnItemTouchListener(new RecyclerViewClickListener(getContext(), new RecyclerViewClickListener.OnItemClickListener() {            @Override            public void onItemClick(View view, int position) {                Toast.makeText(getContext(),"Click "+list.get(position).getGoods_name(),Toast.LENGTH_SHORT).show();//                Intent intent = new Intent(getActivity(), AnimatorActivity.class);////                startActivity(intent);            }            @Override            public void onItemLongClick(View view, int position) {                Toast.makeText(getContext(),"Long Click "+list.get(position).getGoods_name(),Toast.LENGTH_SHORT).show();            }        }));
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