普通的recycleView展示添加删除

1.主页面XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ui.MainActivity"
    android:orientation="vertical"
    >

    <android.support.v7.widget.RecyclerView
        android:id="@+id/mRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="9"
        ></android.support.v7.widget.RecyclerView>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="horizontal"
        >

        <Button
            android:id="@+id/additem"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:text="添加item"
            android:layout_weight="1"
            />
        <Button
            android:id="@+id/delitem"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:text="删除item"
            android:layout_weight="1"
            />
    </LinearLayout>
</LinearLayout>

2.item布局

<?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="vertical"
        >
        <ImageView
            android:id="@+id/image"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@mipmap/ic_launcher"
            android:layout_gravity="center_horizontal"
            />

        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="66666"
            android:textSize="20sp"
            android:layout_gravity="center_horizontal"
            />

    </LinearLayout>
</RelativeLayout>

3.工具包

package com.bawie.www.a20181119_a.model;

import android.os.Handler;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

/**
 * date:2018/11/19
 * author:别来无恙(别来无恙)
 * function:
 */
public class HttpModel {

    public void request(String urlString,final HttpUtilsInterface httpUtilsInterface){
        final Handler handler = new Handler();
        OkHttpClient Client = new OkHttpClient.Builder()
                .build();
        Request request = new Request.Builder().get().url(urlString).build();
        Call call = Client.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        httpUtilsInterface.failure();
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
               final  String string = response.body().string();
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        httpUtilsInterface.success(string);
                    }
                });
            }
        });
    }

    public interface HttpUtilsInterface{
        void success(String json);
        void failure();
    }
}

4.P

package com.bawie.www.a20181119_a.presenrer;

import com.bawie.www.a20181119_a.model.HttpModel;
import com.bawie.www.a20181119_a.model.bean.News;
import com.google.gson.Gson;

import java.util.ArrayList;

/**
 * date:2018/11/19
 * author:别来无恙(别来无恙)
 * function:
 */
public class HttpPresenter {

    public void requestList(String urlString,final HttpPresenterListener httpPresenterListener){
        HttpModel httpModel = new HttpModel();
        httpModel.request(urlString, new HttpModel.HttpUtilsInterface() {
            @Override
            public void success(String json) {
                News news = new Gson().fromJson(json, News.class);
                ArrayList<News.DataBean> data = news.getData();
                httpPresenterListener.success(data);
            }

            @Override
            public void failure() {
                httpPresenterListener.error();
            }
        });
    }

    public interface HttpPresenterListener{
        void success(ArrayList<News.DataBean> data);
        void error();
    }


}

5. bean

package com.bawie.www.a20181119_a.model.bean;

import java.util.ArrayList;

/**
 * date:2018/11/19
 * author:别来无恙(别来无恙)
 * function:
 */
public class News {
    public ArrayList<DataBean> data;

    public ArrayList<DataBean> getData() {
        return data;
    }

     public static class DataBean{
        private String title;
        private String thumbnail_pic_s;

         public String getTitle() {
             return title;
         }

         public String getThumbnail_pic_s() {
             return thumbnail_pic_s;
         }
     }
}

5.adapter

package com.bawie.www.a20181119_a.adapter;

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

import com.bawie.www.a20181119_a.R;
import com.bawie.www.a20181119_a.model.bean.News;
import com.squareup.picasso.Picasso;

import java.util.ArrayList;

/**
 * date:2018/11/19
 * author:别来无恙(别来无恙)
 * function:
 */
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHodler> {
    private ArrayList<News .DataBean> list;
    private Context mContext;

    public RecyclerAdapter(ArrayList<News.DataBean> list, Context context) {
        this.list = list;
        mContext = context;
    }

    @NonNull
    @Override
    public ViewHodler onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View inflate = View.inflate(mContext, R.layout.item, null);
        ViewHodler viewHodler = new ViewHodler(inflate);
        return viewHodler;
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHodler viewHodler,final int i) {
        Picasso.with(mContext).load(list.get(i).getThumbnail_pic_s()).into(viewHodler.mImage);
        viewHodler.title.setText(list.get(i).getTitle());
        viewHodler.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                recyclerAdapterListener.click(list.get(i).getTitle());
            }
        });
    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    public class ViewHodler extends RecyclerView.ViewHolder {
        private final ImageView mImage;
        private final TextView title;
        public ViewHodler(@NonNull View itemView) {
            super(itemView);
             mImage  =  itemView.findViewById(R.id.image);
             title = itemView.findViewById(R.id.title);
        }
    }

    public void add(int i){
        list.add(i,list.get(0));
        notifyItemInserted(i);
        notifyDataSetChanged();
    }
    public void del(int i){
        list.remove(i);
        notifyItemRemoved(i);
        notifyDataSetChanged();
    }

    public interface RecyclerAdapterListener{
        void click(String data);
    }

    private RecyclerAdapterListener recyclerAdapterListener;

    public void setRecyclerAdapterListener(RecyclerAdapterListener recyclerAdapterListeners){
        recyclerAdapterListener = recyclerAdapterListeners;
    }

}

Main

package com.bawie.www.a20181119_a.ui;

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

import com.bawie.www.a20181119_a.R;
import com.bawie.www.a20181119_a.adapter.RecyclerAdapter;
import com.bawie.www.a20181119_a.model.bean.News;
import com.bawie.www.a20181119_a.presenrer.HttpPresenter;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    public static final String Path = "http://www.xieast.com/api/news/news.php";
    private RecyclerView mMRecyclerView;
    private Button mAdditem;
    private Button mDelitem;
    private RecyclerAdapter mRecyclerAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化视图
        initView();
        //初始化数据
        initList();
        mAdditem.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                additem();
            }

        });
        mDelitem.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                delitem();
            }

        });



    }


    private void additem() {
        mRecyclerAdapter.add(0);
    }


    private void delitem() {
        mRecyclerAdapter.del(0);
    }

    private void initList() {
        mMRecyclerView.setLayoutManager(new LinearLayoutManager(this));

        HttpPresenter httpPresenter = new HttpPresenter();
        httpPresenter.requestList(Path, new HttpPresenter.HttpPresenterListener() {


            @Override
            public void success(ArrayList<News.DataBean> data) {
                 mRecyclerAdapter = new RecyclerAdapter(data, MainActivity.this);
                 mMRecyclerView.setAdapter(mRecyclerAdapter);
                mRecyclerAdapter.setRecyclerAdapterListener(new RecyclerAdapter.RecyclerAdapterListener() {
                    @Override
                    public void click(String data) {
                        Toast.makeText(MainActivity.this, data, Toast.LENGTH_SHORT).show();
                    }
                });

            }

            @Override
            public void error() {
                Toast.makeText(MainActivity.this, "请求数据失败", Toast.LENGTH_SHORT).show();
            }
        });
    }

    private void initView() {
        mMRecyclerView = findViewById(R.id.mRecyclerView);
        mAdditem = findViewById(R.id.additem);
        mDelitem = findViewById(R.id.delitem);
    }
}

注意:

implementation 'com.squareup.okhttp3:okhttp:3.12.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.google.code.gson:gson:2.8.5'
    implementation 'com.squareup.picasso:picasso:2.3.2'
 <uses-permission android:name="android.permission.INTERNET"/>

普通的recycleView展示添加删除

1.主页面XML

2.item布局

3.工具包

4.P

5. bean

5.adapter

Main

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