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

 @Override    public 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());        }    }    @Override    public 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() {                    @Override                    public 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);                    }                                       @Override                    public 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() {                            @Override                            public void onClick(DialogInterface dialogInterface, int i) {                                Intent intent;                                switch (i) {                                    case 0://删除item                                        startEditName(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 implements View.OnClickListener, View.OnLongClickListener {    private Context myContext;    private List fruiteList;    private OnItemClickLitener mOnItemClickLitener;    //构造方法    public FruiteAdapter(List fruiteList) {        this.fruiteList = fruiteList;    }    //设置setmOnItemClickLitener的set方法    public void setmOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) {        this.mOnItemClickLitener = mOnItemClickLitener;    }    @Override    public 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value        view.setOnClickListener(this);view.setOnLongClickListener(this);        return holder;    }    @Override    public void onBindViewHolder(FruiteAdapter.ViewHolder holder, int position) {        Fruite fruite = fruiteList.get(position);        holder.fruiteName.setText(fruite.getFruitrName());       // holder.fruiteInfo.setText(fruite.getFruiteInfo());    }    @Override    public 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);    }    @Override    public 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());        }    }    @Override    public 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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