Android recyclerview添加删除条目点击事件

1.首先导入recyclerview依赖

 implementation 'com.android.support:recyclerview-v7:28.0.0'

2.activity_main.xml

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:id="@+id/btn1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="添加"/>
        <Button
            android:id="@+id/btn2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="删除"/>
        <Button
            android:id="@+id/btn3"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="list"/>
        <Button
            android:id="@+id/btn4"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="grid"/>
        <Button
            android:id="@+id/btn5"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="flow"/>
    </LinearLayout>

    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/recycleview"
        android:scrollbars="vertical"></android.support.v7.widget.RecyclerView>

3.iten.xml布局(适配器)

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:gravity="center_horizontal">
        <ImageView
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:src="@mipmap/ic_launcher"
            android:id="@+id/img"/>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/tv"
            android:text="别来无恙"
            android:textSize="25sp"
            android:paddingTop="30dp"/>
    </LinearLayout>


</RelativeLayout>

4.MainActivity主页面

package com.bwie.a20181114;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {


    private Button btn1;
    private Button btn2;
    private Button btn3;
    private Button btn4;
    private Button btn5;
    private RecyclerView recycleview;
    private List<String> mList;
    private RecycleViewAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化控件
        initView();
        //初始化数据
        initData();
        //适配器
        mAdapter = new RecycleViewAdapter(mList, this);
        recycleview.setAdapter(mAdapter);
        mAdapter.setmkkListener(new RecycleViewAdapter.mkkListener() {
            @Override
            public void success(String data) {
                Toast.makeText(MainActivity.this, data, Toast.LENGTH_SHORT).show();
            }
        });

        //线性管理器,支持横向纵向
        LinearLayoutManager manager = new LinearLayoutManager(this);
        recycleview.setLayoutManager(manager);
    }

    private void initData() {
        mList = new ArrayList<>();
        for (int i = 0; i < 100; i++) {
            mList.add("别来无恙"+i);
        }

    }

    private void initView() {
        btn1 = (Button) findViewById(R.id.btn1);
        btn2 = (Button) findViewById(R.id.btn2);
        btn3 = (Button) findViewById(R.id.btn3);
        btn4 = (Button) findViewById(R.id.btn4);
        btn5 = (Button) findViewById(R.id.btn5);
        recycleview = (RecyclerView) findViewById(R.id.recycleview);

        btn1.setOnClickListener(this);
        btn2.setOnClickListener(this);
        btn3.setOnClickListener(this);
        btn4.setOnClickListener(this);
        btn5.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn1://添加
                mAdapter.addData(1);
                break;
            case R.id.btn2://删除
                mAdapter.delData(1);
                break;
            case R.id.btn3://list
                //线性管理器,支持横向纵向
                LinearLayoutManager manager = new LinearLayoutManager(this);
                recycleview.setLayoutManager(manager);
                break;
            case R.id.btn4://grid
                //网格布局管理器
                GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 3);
                recycleview.setLayoutManager(gridLayoutManager);
                break;
            case R.id.btn5://flow
                //瀑布式布局管理
                StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
                recycleview.setLayoutManager(staggeredGridLayoutManager);
                break;
        }
    }
}

5.适配器

package com.bwie.a20181114;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.PointerIcon;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

/**
 * date:2018/11/14
 * author:别来无恙(别来无恙)
 * function:
 */
public class RecycleViewAdapter extends RecyclerView.Adapter<RecycleViewAdapter.ViewHolder> {

    private List<String> mList;
    private Context mContext;

    public RecycleViewAdapter(List<String> list, Context context) {
        mList = list;
        mContext = context;
    }
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = View.inflate(mContext,R.layout.iten,null);
        ViewHolder viewHolder = new ViewHolder(view);
        return viewHolder;
    }
    @Override
    public void onBindViewHolder(@NonNull ViewHolder viewHolder,final int i) {
        viewHolder.mImg.setImageResource(R.drawable.n);
        viewHolder.mTv.setText(mList.get(i));
        viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mkkListener.success(mList.get(i));
            }
        });
    }
    @Override
    public int getItemCount() {
        return mList.size();
    }
    //添加数据
    public void addData(int i) {
        mList.add(i,"1");
        notifyItemInserted(i);

    }
    //删除数据
    public void delData(int i) {
        mList.remove(i);
        //更新
        notifyItemRemoved(i);
    }

    public class ViewHolder extends RecyclerView.ViewHolder {

        private final ImageView mImg;
        private final TextView mTv;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            mImg = itemView.findViewById(R.id.img);
            mTv = itemView.findViewById(R.id.tv);
        }
    }

    public interface  mkkListener{
        void success(String data);
    }

    private mkkListener mkkListener;

    public void setmkkListener(mkkListener mkkListeners){
        mkkListener  = mkkListeners;
    }
}