Android中RecyclerView的长按

案例：点击跳转页面，长按弹窗，点击删除。

【完整代码在这里】

首先，写好点击事件的接口类

 //自定义点击接口类public interface OnItemClickLitener {//点击事件void onItemClick(View view, int position);//长按事件void onItemLongClick(View view, int position);}

一、步骤
（1）在Adapter中写一个item的点击事件接口，Adapter中设置该接口，并给其一个set方法

//申明接口private OnItemClickLitener mOnItemClickLitener;

//设置setmOnItemClickLitener的set方法public void setmOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) {this.mOnItemClickLitener = mOnItemClickLitener;}

（2）Adapter类实现 View.OnClickListener, View.OnLongClickListener接口，并实现其方法。实现接口的方法中，回调item的点击事件接口

 @Overridepublic void onClick(View view) {//回调点击事件ViewHolder holder = (ViewHolder) view.getTag(R.id.fruite_holder);if (mOnItemClickLitener != null) {this.mOnItemClickLitener.onItemClick(view, holder.getAdapterPosition());}}@Overridepublic boolean onLongClick(View view) {//回调长按事件ViewHolder holder = (ViewHolder) view.getTag(R.id.fruite_holder);if (mOnItemClickLitener != null) {this.mOnItemClickLitener.onItemLongClick(view, holder.getAdapterPosition());}return false;}

（3）在Activity中调用方法

Adapter.setmOnItemClickLitener(new ExcelAdapter.OnItemClickLitener() {@Overridepublic void onItemClick(View view, int position) {//单击事件，例如跳转页面Object object = list.get(position);Intent intent = new Intent(getActivity(),OtherActivity.class);startActivity(intent);}@Overridepublic void onItemLongClick(View view, final int position) {//长按事件,弹窗Object object = list.get(position);final String[] items = { "删除"};android.app.AlertDialog.Builder listDialog = new android.app.AlertDialog.Builder(getActivity());listDialog.setItems(items, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialogInterface, int i) {Intent intent;switch (i) {case 0://删除itemstartEditName(table);break;default:break;}}});listDialog.show();}});

二、主要代码
adapter的完整代码

package com.example.lj.sqlapp;import android.content.Context;
import android.media.Image;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;import java.text.SimpleDateFormat;
import java.util.List;/*** 2018-9-5*/
public class FruiteAdapter extends RecyclerView.Adapter<FruiteAdapter.ViewHolder> implements View.OnClickListener, View.OnLongClickListener {private Context myContext;private List<Fruite> fruiteList;private OnItemClickLitener mOnItemClickLitener;//构造方法public FruiteAdapter(List<Fruite> fruiteList) {this.fruiteList = fruiteList;}//设置setmOnItemClickLitener的set方法public void setmOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) {this.mOnItemClickLitener = mOnItemClickLitener;}@Overridepublic FruiteAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {if (myContext == null) {myContext = parent.getContext();}View view = LayoutInflater.from(myContext).inflate(R.layout.item_list, parent, false);ViewHolder holder = new FruiteAdapter.ViewHolder(view);view.setTag(R.id.fruite_holder,holder);//注意这里，对应values/ids.xml里的valueview.setOnClickListener(this);view.setOnLongClickListener(this);return holder;}@Overridepublic void onBindViewHolder(FruiteAdapter.ViewHolder holder, int position) {Fruite fruite = fruiteList.get(position);holder.fruiteName.setText(fruite.getFruitrName());// holder.fruiteInfo.setText(fruite.getFruiteInfo());}@Overridepublic int getItemCount() {return fruiteList.size();}public void addData(int position, Fruite fruite) {fruiteList.add(position, fruite);notifyItemInserted(position);}public void removeData(int position) {fruiteList.remove(position);notifyItemRemoved(position);}@Overridepublic void onClick(View view) {//回调点击事件ViewHolder holder = (ViewHolder) view.getTag(R.id.fruite_holder);if (mOnItemClickLitener != null) {this.mOnItemClickLitener.onItemClick(view, holder.getAdapterPosition());}}@Overridepublic boolean onLongClick(View view) {//回调长按事件ViewHolder holder = (ViewHolder) view.getTag(R.id.fruite_holder);if (mOnItemClickLitener != null) {this.mOnItemClickLitener.onItemLongClick(view, holder.getAdapterPosition());}return false;}public class ViewHolder extends RecyclerView.ViewHolder {private CardView careView;private TextView fruiteName;private TextView fruiteInfo;private ImageView fruiteImg;public ViewHolder(View itemView) {super(itemView);fruiteImg = itemView.findViewById(R.id.card_fruit_image);fruiteName = itemView.findViewById(R.id.card_fruit_name);}}//自定义点击接口类public interface OnItemClickLitener {void onItemClick(View view, int position);void onItemLongClick(View view, int position);}
}

三、部分界面

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