MVP OKHttp RecycleView 显示数据

在这里插入图片描述

activity_xml布局

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout
    android:layout_width="match_parent"
    android:background="#aaa"
    android:orientation="horizontal"
    android:gravity="center_vertical"
    android:layout_height="wrap_content">
    <ImageView
        android:src="@drawable/fan"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="wrap_content" />
    <TextView
        android:layout_weight="10"
        android:layout_width="0dp"
        android:text="今日头条"
        android:gravity="center"
        android:layout_height="wrap_content" />

    <ImageView
        android:src="@drawable/mo"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="wrap_content" />


</LinearLayout>

<android.support.v7.widget.RecyclerView

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

HttpUtils页面

package bw.com.a1117moni.utils;

import android.os.Handler;

import com.google.gson.Gson;

import java.io.IOException;
import java.lang.reflect.Type;

import bw.com.a1117moni.callback.ICallBack;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

/**

Created by lenovo on 2018-11-17.
*/

public class HttpUtils {
private static volatile HttpUtils instance;

private OkHttpClient client;

private Handler handler = new Handler();

private  HttpUtils(){
    client=new OkHttpClient();
}

public static HttpUtils getInstance(){
    if (instance == null){
        synchronized (HttpUtils.class){
            if (null == instance){
                instance = new HttpUtils();
            }
        }
    }
    return instance;
}
public void get(String url, final ICallBack callBack, final Type type){
    Request request = new Request.Builder()
            .url(url)
            .get()
            .build();
    Call call = client.newCall(request);
    call.enqueue(new Callback() {
        @Override
        public void onFailure(Call call, final IOException e) {
            handler.post(new Runnable() {
                @Override
                public void run() {
                    callBack.onFailed(e);
                }
            });
        }

        @Override
        public void onResponse(Call call, Response response) throws IOException {
            String string = response.body().string();
            Gson gson = new Gson();
            final Object o = gson.fromJson(string, type);

            handler.post(new Runnable() {
                @Override
                public void run() {
                    callBack.onSuccess(o);
                }
            });

        }
    });
}

}

IView页面

package bw.com.a1117moni.frist.view;

import java.util.List;

import bw.com.a1117moni.bean.News;

/**

Created by lenovo on 2018-11-17.
*/

public interface IView {
void onSuccess(List<News.DataBean> list);

void onFailed(Exception e);

}

NewsPresenter页面

package bw.com.a1117moni.frist.presenter;

import com.google.gson.reflect.TypeToken;

import java.lang.reflect.Type;

import bw.com.a1117moni.bean.News;
import bw.com.a1117moni.callback.ICallBack;
import bw.com.a1117moni.frist.model.NewsModel;
import bw.com.a1117moni.frist.view.IView;

/**

Created by lenovo on 2018-11-17.
*/

public class NewsPresenter {
private IView iv;
private NewsModel newsModel;

public void attach(IView iv) {
    this.iv = iv;
    newsModel = new NewsModel();
}

public void get(){

    Type type = new TypeToken<News>(){}.getType();

    newsModel.getNews("http://www.xieast.com/api/news/news.php", new ICallBack() {
        @Override
        public void onSuccess(Object o) {
            News newsBean = (News) o;
            if (newsBean != null){
                iv.onSuccess(newsBean.getData());
            }
        }

        @Override
        public void onFailed(Exception e) {
            iv.onFailed(e);
        }
    },type);
}

}

NewsModel页面

package bw.com.a1117moni.frist.model;

import java.lang.reflect.Type;

import bw.com.a1117moni.callback.ICallBack;
import bw.com.a1117moni.utils.HttpUtils;

/**

Created by lenovo on 2018-11-17.
*/

public class NewsModel {
public void getNews(String url, ICallBack callBack, Type type){
HttpUtils.getInstance().get(url,callBack,type);
}
}

ICallBack页面

package bw.com.a1117moni.callback;

/**

Created by lenovo on 2018-11-17.
*/

public interface ICallBack {
void onSuccess(Object o);

void onFailed(Exception e);

}

NewsAdapter页面

package bw.com.a1117moni.adapter;

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

import com.bumptech.glide.Glide;

import java.util.List;

import bw.com.a1117moni.R;
import bw.com.a1117moni.bean.News;

/**

Created by lenovo on 2018-11-17.
*/

public class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.ViewHolder>{
private Context context;
private List<News.DataBean> list;

public NewsAdapter(Context context, List<News.DataBean> list) {
    this.context = context;
    this.list = list;
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v=View.inflate(context, R.layout.news_item,null);
    ViewHolder holder=new ViewHolder(v);
    return holder;
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {

    Glide.with(context).load(list.get(position).getThumbnail_pic_s()).into(holder.imgNews);
    holder.txtNews.setText(list.get(position).getTitle());


}

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

public class ViewHolder extends RecyclerView.ViewHolder {
    private ImageView imgNews;
    private TextView txtNews;

    public ViewHolder(View itemView) {
        super(itemView);
        imgNews = itemView.findViewById(R.id.img);
        txtNews = itemView.findViewById(R.id.title);
    }
}

}

MainActivity页面

package bw.com.a1117moni;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
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.widget.Toast;

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

import bw.com.a1117moni.adapter.NewsAdapter;
import bw.com.a1117moni.bean.News;
import bw.com.a1117moni.frist.presenter.NewsPresenter;
import bw.com.a1117moni.frist.view.IView;

public class MainActivity extends AppCompatActivity implements IView{
private RecyclerView rvNews;
private NewsAdapter adapter;
private List<News.DataBean> listBeans;
private NewsPresenter presenter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rvNews=findViewById(R.id.rv_news);
RecyclerView.LayoutManager manager = new LinearLayoutManager(this);
rvNews.setLayoutManager(manager);
listBeans = new ArrayList<>();
adapter = new NewsAdapter(this,listBeans);
rvNews.setAdapter(adapter);
presenter = new NewsPresenter();
presenter.attach(this);
presenter.get();
}

@Override
public void onSuccess(List<News.DataBean> list) {
    if (list != null){
        listBeans.clear();
        listBeans.addAll(list);
        adapter.notifyDataSetChanged();
    }
}

@Override
public void onFailed(Exception e) {
    Toast.makeText(this,"网络连接错误",Toast.LENGTH_LONG).show();
}

}

new_item页面

<?xml version="1.0" encoding="utf-8"?>