TabLayout下ViewPager显示Json解析数据

---------------------------------MainActivity-----------------------------------

package com.example.com.tablayoutjson;

import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

import java.util.ArrayList;


public class MainActivity extends AppCompatActivity {

    private TabLayout tab;
    String[] strings = {"首页","推荐","什么","魑魅魍魉","灵异","明星","军事","娱乐"};
    private String json_url = "http://api.expoon.com/AppNews/getNewsList/type/1/p/";
    private ViewPager viewpager;
    private ArrayList<Fragment> fragments;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tab = findViewById(R.id.tablayout);
        viewpager = findViewById(R.id.viewpager);

        tab.setupWithViewPager(viewpager);

        for (int i = 0; i < strings.length; i++) {
            tab.addTab(tab.newTab().setText(strings[i]));
        }
        fragments = new ArrayList<>();
        for (int i = 0; i < strings.length; i++) {
            MyFragment fragment = new MyFragment();
            Bundle bundle = new Bundle();
            bundle.putString("title",json_url+(i+1));
            fragment.setArguments(bundle);
            fragments.add(fragment);
        }
        viewpager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
            @Override
            public Fragment getItem(int position) {
                return fragments.get(position);
            }

            @Override
            public int getCount() {
                return fragments.size();
            }

            @Override
            public CharSequence getPageTitle(int position) {
                return strings[position];
            }
        });
    }
}

-------------------------MyFragment------------------------------------

import android.annotation.SuppressLint;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

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

public class MyFragment extends Fragment {

    private PullToRefreshListView plv;
    private String title;
    private List<User.DataBean> plist;

    @SuppressLint("StaticFieldLeak")
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.myfragment, container, false);

        plv = view.findViewById(R.id.plv);
        Bundle bundle = getArguments();
        title = bundle.getString("title");
        plist = new ArrayList<>();

        new AsyncTask<String,Integer,String>(){

            @Override
            protected String doInBackground(String... strings) {
                String getjson = new Utils().getjson(title);
                return getjson;
            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                Gson gson = new Gson();
                User user = gson.fromJson(s, User.class);
                plist = user.getData();
                MyAdapter adapter = new MyAdapter(getActivity(),plist);
                plv.setAdapter(adapter);
            }
        }.execute();

        return view;
    }
}

------------------------------------MyAdapter-------------------------------

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.List;

public class MyAdapter extends BaseAdapter {

    private Context context;
    private List<User.DataBean> list;

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

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

    @Override
    public Object getItem(int i) {
        return list.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        viewHolder holder;
        if (view == null){
            view = View.inflate(context,R.layout.plist,null);
            holder = new viewHolder();
            holder.listimg = view.findViewById(R.id.listimg);
            holder.listname = view.findViewById(R.id.listname);
            view.setTag(holder);
        }else{
            holder = (viewHolder) view.getTag();
        }
        holder.listname.setText(list.get(i).getNews_summary());
        ImageLoader.getInstance().displayImage(list.get(i).getPic_url(),holder.listimg,MyApp.getoptions());
        return view;
    }
    public class viewHolder{
        private ImageView listimg;
        private TextView listname;
    }
}

-----------------------MyApp----------------------------------------//此类是ImageLoader的一些配置

注：ImageLoader需要依赖库

import android.app.Application;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.os.Environment;

import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiscCache;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;

import java.io.File;

public class MyApp extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        ImageLoaderConfiguration builder = new ImageLoaderConfiguration.Builder(this)
                .memoryCacheExtraOptions(200,300)
                .threadPoolSize(5)
                .memoryCacheSize(2*1024*1024)
                .diskCacheSize(50*1024*1024)
                .diskCacheFileCount(100)
                .diskCache(new UnlimitedDiscCache(new File(Environment.getExternalStorageDirectory()+"xie1223")))
                .build();
        ImageLoader.getInstance().init(builder);
    }

    public static DisplayImageOptions getoptions() {
        DisplayImageOptions options = new DisplayImageOptions.Builder()
                .showImageOnFail(R.mipmap.ic_launcher)
                .showImageForEmptyUri(R.mipmap.ic_launcher)
                .cacheInMemory(true)
                .cacheOnDisk(true)
                .imageScaleType(ImageScaleType.EXACTLY)
                .bitmapConfig(Bitmap.Config.RGB_565)
                .displayer(new RoundedBitmapDisplayer(20))
                .build();
        return options;
    }
    public static DisplayImageOptions getyuan() {
        DisplayImageOptions options = new DisplayImageOptions.Builder()
                .showImageOnFail(R.mipmap.ic_launcher)
                .showImageForEmptyUri(R.mipmap.ic_launcher)
                .cacheInMemory(true)
                .cacheOnDisk(true)
                .imageScaleType(ImageScaleType.EXACTLY)
                .bitmapConfig(Bitmap.Config.RGB_565)
//                .displayer(new CircleBitmapDisplayer(Color.WHITE,3))
                .build();
        return options;
    }
}

---------------------------Utils------------------------------------//工具类

import android.util.Log;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class Utils {
    public String getjson(String json_url){
        URL url = null;
        HttpURLConnection connection = null;
        String jsonstr = "";
        try {
            url = new URL(json_url);
            connection = (HttpURLConnection) url.openConnection();
            connection.setConnectTimeout(5000);
            connection.setReadTimeout(5000);
            int rescode = connection.getResponseCode();
            if (rescode == 200){
                InputStream inputStream = connection.getInputStream();
                byte[] b = new byte[1024];
                int len = -1;
                while ((len = inputStream.read(b))!=-1){
                    String s = new String(b,0,len);
                    jsonstr+=s;
                }
                Log.d("Main",jsonstr);
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return jsonstr;
    }
}

----------------------------User-----------------------------//bean类

public class User {


    private int status;
    private String info;
    private List<DataBean> data;

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public String getInfo() {
        return info;
    }

    public void setInfo(String info) {
        this.info = info;
    }

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

    public void setData(List<DataBean> data) {
        this.data = data;
    }

    public static class DataBean {
        /**
         * news_id : 13811
         * news_title : 深港澳台千里连线，嘉年华会今夏入川
         * news_summary : 6月17—20日，“2016成都深港澳台嘉年华会”(简称嘉年华会)将在成都世纪城国际会展中心举办。其主办方励展华博借力旗
         * pic_url : http://f.expoon.com/sub/news/2016/01/21/887844_230x162_0.jpg
         */

        private String news_id;
        private String news_title;
        private String news_summary;
        private String pic_url;

        public String getNews_id() {
            return news_id;
        }

        public void setNews_id(String news_id) {
            this.news_id = news_id;
        }

        public String getNews_title() {
            return news_title;
        }

        public void setNews_title(String news_title) {
            this.news_title = news_title;
        }

        public String getNews_summary() {
            return news_summary;
        }

        public void setNews_summary(String news_summary) {
            this.news_summary = news_summary;
        }

        public String getPic_url() {
            return pic_url;
        }

        public void setPic_url(String pic_url) {
            this.pic_url = pic_url;
        }
    }
}

-------------------------------activity_main.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:orientation="vertical"
    android:layout_height="match_parent"
    tools:context="com.example.com.tablayoutjson.MainActivity">

    <android.support.design.widget.TabLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabMode="scrollable"
        android:id="@+id/tablayout"
        />
    <android.support.v4.view.ViewPager
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/viewpager"
        />
</LinearLayout>

-----------------------------------myfragment.xml---------------------------------------

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

    <com.handmark.pulltorefresh.library.PullToRefreshListView
        android:layout_marginTop="3dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/plv"/>

</LinearLayout>

----------------------------------plist.xml--------------------------------------

<?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="match_parent">

    <ImageView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@mipmap/ic_launcher"
        android:id="@+id/listimg"
        android:layout_margin="10dp"/>
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginLeft="10dp"
        android:id="@+id/listname"
        android:layout_toRightOf="@+id/listimg"
        android:text="哈哈"
        android:textSize="18sp"/>

</RelativeLayout>

TabLayout下ViewPager显示Json解析数据

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