RecyclerView的item点击事件和长按事件

RecyclerView 是Android L版本中新添加的一个用来取代ListView的SDK，灵活性很强，可以实现listview，gridview，瀑布流的效果，但是没有专门封装的item点击事件和长按事件，个人一般在适配器里写回调实现这俩方法

首先要，先引入包来支持控件

compile 'com.android.support:recyclerview-v7:22.2.1'

然后要在适配器里写好回调

public class PresetAdapter extends RecyclerView.Adapter<AlarmPresetAdapter.MyViewHolder> {    private Context context;    private LayoutInflater inflater;    private OnRecyclerViewItemClickListener mOnItemClickListener = null;    private OnRecyclerItemLongListener mOnItemLong = null;    private ArrayList<String> arrayList;    public PresetAdapter(Context context,ArrayList<String> arrayList){        this.context = context;        this.arrayList = arrayList;        inflater = LayoutInflater.from(context);    }    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = inflater.inflate(R.layout.item_preset, parent, false);        MyViewHolder holder = new MyViewHolder(view, mOnItemClickListener,mOnItemLong);//        view.setOnClickListener(this);        return holder;    }    @Override    public void onBindViewHolder(MyViewHolder holder, int position) {        holder.tv_alarm_preset_type.setText(arrayList.get(position));    }    @Override    public int getItemCount() {        return arrayList.size();    }    public static class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener,View.OnLongClickListener {        private OnRecyclerViewItemClickListener mOnItemClickListener = null;        private OnRecyclerItemLongListener mOnItemLong = null;        private TextView tv_alarm_preset_value;        private TextView tv_alarm_preset_type;        private TextView tv_alarm_preset_status;        private SwitchButton sb_alarm_preset_switch;        public MyViewHolder(View itemView, OnRecyclerViewItemClickListener mListener,OnRecyclerItemLongListener longListener) {            super(itemView);            this.mOnItemClickListener = mListener;            this.mOnItemLong = longListener;            tv_alarm_preset_value = (TextView) itemView.findViewById(R.id.tv_alarm_preset_value);            tv_alarm_preset_type = (TextView) itemView.findViewById(R.id.tv_alarm_preset_type);            tv_alarm_preset_status = (TextView) itemView.findViewById(R.id.tv_alarm_preset_status);            sb_alarm_preset_switch = (SwitchButton) itemView.findViewById(R.id.sb_alarm_preset_switch);            itemView.setOnClickListener(this);            itemView.setOnLongClickListener(this);        }        @Override        public void onClick(View v) {            if (mOnItemClickListener != null) {                //注意这里使用getTag方法获取数据                mOnItemClickListener.onItemClick(v, getAdapterPosition());            }        }        @Override        public boolean onLongClick(View v) {            if(mOnItemLong != null){                mOnItemLong.onItemLongClick(v,getPosition());            }            return true;        }    }    //define interface    public interface OnRecyclerViewItemClickListener {        void onItemClick(View view, int data);    }    public interface OnRecyclerItemLongListener{        void onItemLongClick(View view,int position);    }    public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {        this.mOnItemClickListener = listener;    }    public void setOnItemLongClickListener(OnRecyclerItemLongListener listener){        this.mOnItemLong =  listener;    }

可以看到无论是item点击事件还是长按事件都是写在MyViewHolder上，来实现的

最后还要在Activity里实现这两个方法

adapter.setOnItemClickListener(new AlarmPresetAdapter.OnRecyclerViewItemClickListener() {            @Override            public void onItemClick(View view, int data) {                T.showShort(context, "点击了");            }        });        adapter.setOnItemLongClickListener(new AlarmPresetAdapter.OnRecyclerItemLongListener() {            @Override            public void onItemLongClick(View view, int position) {                T.showShort(context, "长按了");            }        });

完