Fragemnt+ViewPager微信页面+ListView

Xml布局

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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=".MainActivity"
    android:orientation="vertical"
    >
    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="9"
        />
    <RadioGroup
        android:id="@+id/radiogroup"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:orientation="horizontal"
        tools:layout_editor_absoluteX="16dp"
        tools:layout_editor_absoluteY="423dp">
        <RadioButton
            android:id="@+id/radiobutton1"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:button="@null"
            android:drawableTop="@drawable/selector_button1"
            android:gravity="center"
            android:text="首页" />
        <RadioButton
            android:id="@+id/radiobutton2"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:button="@null"
            android:drawableTop="@drawable/selector_button1"
            android:gravity="center"
            android:text="首页" />

        <RadioButton
            android:id="@+id/radiobutton3"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:button="@null"
            android:drawableTop="@drawable/selector_button1"
            android:gravity="center"
            android:text="首页" />
    </RadioGroup>

</android.support.constraint.ConstraintLayout>

MathActivity.this页面

package com.example.listview_1;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.RadioGroup;

import com.example.listview_1.adapter.MyFragmentPager;
import com.example.listview_1.fragment.Frag_01;
import com.example.listview_1.fragment.Frag_02;
import com.example.listview_1.fragment.Frag_03;

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

public class MainActivity extends AppCompatActivity {
    private ViewPager viewpager;
    private List<Fragment>list;
    private MyFragmentPager fgadapter;
    private RadioGroup radiogroup;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        viewpager=findViewById(R.id.viewpager);
        radiogroup=findViewById(R.id.radiogroup);
        list = new ArrayList<Fragment>();
        Frag_01 frag_01 = new Frag_01();
        Frag_02 frag_02 = new Frag_02();
        Frag_03 frag_03 = new Frag_03();
        list.add(frag_01);
        list.add(frag_02);
        list.add(frag_03);
        fgadapter = new MyFragmentPager(getSupportFragmentManager(),list,MainActivity.this);
        viewpager.setAdapter(fgadapter);
        viewpager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int i, float v, int i1) {
                radiogroup.check(radiogroup.getChildAt(i).getId());
            }

            @Override
            public void onPageSelected(int i) {

            }

            @Override
            public void onPageScrollStateChanged(int i) {

            }
        });
        radiogroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                switch (checkedId){
                    case R.id.radiobutton1:
                        viewpager.setCurrentItem(0);
                        break;
                    case R.id.radiobutton2:
                        viewpager.setCurrentItem(1);
                        break;
                    case R.id.radiobutton3:
                        viewpager.setCurrentItem(2);
                        break;
                }

            }
        });

    }
}

Frag_01页面

package com.example.listview_1.fragment;

import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.annotation.RequiresApi;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;

import com.example.listview_1.MainActivity;
import com.example.listview_1.NetWorkUtils;
import com.example.listview_1.R;
import com.example.listview_1.adapter.MyBase;
import com.example.listview_1.bean.ListBean;
import com.google.gson.Gson;

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

public class Frag_01 extends Fragment {
    private String url="http://api.expoon.com/AppNews/getNewsList/type/1/p/1";
    private ListView listview;
    private List<ListBean.DataBean>list;
    private MyBase adapter;
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.frag_01,container,false);
        listview=view.findViewById(R.id.listview);
        list = new ArrayList<ListBean.DataBean>();
        adapter = new MyBase(list,getActivity());
        listview.setAdapter(adapter);
        new MAsyncTask().execute(url);
        return view;

    }
    class MAsyncTask extends AsyncTask<String,Void,String>{

        @Override
        protected String doInBackground(String... strings) {
            String json = NetWorkUtils.getJson(strings[0]);
            return json;
        }

        @RequiresApi(api = Build.VERSION_CODES.CUPCAKE)
        @Override
        protected void onPostExecute(String s) {
           Gson gson = new Gson();
           ListBean bean = gson.fromJson(s,ListBean.class);
            List<ListBean.DataBean> datalist = bean.getData();
            list.addAll(datalist);
            adapter.notifyDataSetChanged();;
            super.onPostExecute(s);
        }
    }
}

MyApp页面 imageLoader

package com.example.listview_1;

import android.app.Application;

import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

public class MyApp extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        ImageLoaderConfiguration imageLoaderConfiguration = new ImageLoaderConfiguration.Builder(this).build();
        ImageLoader.getInstance().init(imageLoaderConfiguration);
    }
}

工具类

package com.example.listview_1;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

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

public class NetWorkUtils {

    /**
     * 请求网络图片
     *
     * @param mUrl 接口地址
     * @return bitmap
     */
   /* public static Bitmap getBitmpa(String mUrl) {
        try {

            URL url = new URL(mUrl);//封装url接口
            //打开了连接
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            int responseCode = urlConnection.getResponseCode();
            if (responseCode == 200) {
                InputStream inputStream = urlConnection.getInputStream();
                Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
                return bitmap;
            } else {
                Log.e("wzq", "responseCode---bitmap:" + responseCode);
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }*/

    public static String getJson(String urlString) {
        try {

            URL url = new URL(urlString);//封装url接口
            //打开了连接
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            int responseCode = urlConnection.getResponseCode();
            if (responseCode == 200) {
                InputStream inputStream = urlConnection.getInputStream();
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
                String temp="";
                StringBuilder stringBuilder = new StringBuilder();
                while ((temp  =bufferedReader.readLine()) != null){
                    stringBuilder.append(temp);
                }
                return  stringBuilder.toString();
            } else {
                Log.e("wzq", "responseCode---json:" + responseCode);
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }


        return "";

    }
}

ListView适配器

package com.example.listview_1.adapter;

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.example.listview_1.MainActivity;
import com.example.listview_1.R;
import com.example.listview_1.bean.ListBean;
import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.List;

public class MyBase extends BaseAdapter {
    private List<ListBean.DataBean>list;
    private Context context;

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

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

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

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null){
            convertView = View.inflate(context,R.layout.item,null);
            holder = new ViewHolder();
            holder.textview=convertView.findViewById(R.id.textview3);
            //获取图片资源id
            holder.imageview=convertView.findViewById(R.id.imageView);
            convertView.setTag(holder);
        }else{
            holder= (ViewHolder) convertView.getTag();
        }
        holder.textview.setText(list.get(position).getNews_title());
        //展示图片
        ImageLoader.getInstance().displayImage(list.get(position).getPic_url(),holder.imageview);
        return convertView;
    }
    class ViewHolder{
        TextView textview;
        ImageView imageview;
    }
}