Tablayout+pullTorefreshlistview(上拉，下拉)+数组Json串解析

	MyTask工具类代码

public class MyTask extends AsyncTask{
    //为借口提供有参构造
    private ICallBeak iCallBeak;
    public MyTask(ICallBeak iCallBeak){
        this.iCallBeak=iCallBeak;
    }
    @Override
    protected String doInBackground(String... strings) {
        try {
            URL url=new URL(strings[0]);
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setReadTimeout(5000);
            urlConnection.setConnectTimeout(5000);
            urlConnection.setRequestMethod("GET");
            int responseCode = urlConnection.getResponseCode();
            if(responseCode==200){
                InputStream inputStream = urlConnection.getInputStream();
                String s = getTostring(inputStream);
                Log.d("--", "doInBackground: "+s);
                return s;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);
        iCallBeak.getJson(s);//调用
    }

    //字符转换
    private String getTostring(InputStream inputStream) {
        StringBuilder builder=new StringBuilder();
        BufferedReader reader=new BufferedReader(new InputStreamReader(inputStream));
        String str;
        try {
            while((str=reader.readLine())!=null){
                builder.append(str);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return builder.toString();
    }
    //定义接口
    public interface ICallBeak{
        void getJson(String json);
    }
}

判断网络工具类

public class NetStateUtil {
    /*
* 判断网络连接是否已开
* true 已打开  false 未打开
* */
    public static boolean isConn(Context context){
        boolean bisConnFlag=false;
        ConnectivityManager conManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo network = conManager.getActiveNetworkInfo();
        if(network!=null){
            bisConnFlag=conManager.getActiveNetworkInfo().isAvailable();
        }
        return bisConnFlag;
    }

    /**
     * 当判断当前手机没有网络时选择是否打开网络设置
     * @param context
     */
    public static void showNoNetWorkDlg(final Context context) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setIcon(R.mipmap.ic_launcher)         //
                .setTitle(R.string.app_name)            //
                .setMessage("当前无网络").setPositiveButton("设置", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // 跳转到系统的网络设置界面
                Intent intent = null;
                // 先判断当前系统版本
                if(android.os.Build.VERSION.SDK_INT > 10){  // 3.0以上
                    intent = new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);
                }else{
                    intent = new Intent();
                    intent.setClassName("com.android.settings", "com.android.settings.WirelessSettings");
                }
                context.startActivity(intent);

            }
        }).setNegativeButton("知道了", null).show();
    }
}

	Applaction工具类

public class Applaction extends Application{
    @Override
    public void onCreate() {
        super.onCreate();
//自定义sd卡缓存目录

        File file=new File(Environment.getExternalStorageDirectory()+"/images");
        //初始化，，全局配置applction
        ImageLoaderConfiguration configuration=new ImageLoaderConfiguration.Builder(this)
                .memoryCacheExtraOptions(400, 700)//缓存图片最大的长和宽
                .threadPoolSize(3)//线程池的数量
                .threadPriority(4)
                .memoryCacheSize(20*1024*1024)//设置内存缓存区大小
                .diskCacheSize(80*1024*1024)//设置sd卡缓存区大小
                .diskCache(new UnlimitedDiscCache(file))//自定义sd卡缓存目录
                .writeDebugLogs()//打印日志内容
                .diskCacheFileNameGenerator(new Md5FileNameGenerator())//给缓存的文件名进行md5加密处理
                .build();
        ImageLoader.getInstance().init(configuration);

    }
}

activity布局

xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:ptr="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="com.example.com.yue_kao.MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        >
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="9"
        android:id="@+id/frame"
         >


    FrameLayout>
        <RadioGroup
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:id="@+id/group"
            android:orientation="horizontal">
            <RadioButton
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:id="@+id/but1"
                android:layout_weight="1"
                android:gravity="center"
                android:button="@null"
                android:checked="true"
                android:drawableTop="@drawable/image_selector"
                android:textColor="@color/text_color"
                android:text="首页"
                />
            <RadioButton
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:id="@+id/but2"
                android:layout_weight="1"
                android:gravity="center"
                android:button="@null"
                android:drawableTop="@drawable/image_selector2"
                android:textColor="@color/text_color"
                android:text="自选"
                />
            <RadioButton
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:id="@+id/but3"
                android:layout_weight="1"
                android:gravity="center"
                android:button="@null"
                android:drawableTop="@drawable/image_selector3"
                android:textColor="@color/text_color"
                android:text="行情"
                />
            <RadioButton
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:id="@+id/but4"
                android:layout_weight="1"
                android:gravity="center"
                android:button="@null"
                android:drawableTop="@drawable/image_selector4"
                android:textColor="@color/text_color"
                android:text="资讯"
                />
        RadioGroup>

    LinearLayout>

    <LinearLayout
        android:layout_width="200dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="#ff0"
        >
        <ImageView
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:src="@drawable/w06"/>
        <ListView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/listview">ListView>

    LinearLayout>
android.support.v4.widget.DrawerLayout>

MainActivity代码（页面切换）------------

public class MainActivity extends AppCompatActivity {

    private RadioGroup group;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);
        //找到控件
        getSupportFragmentManager().beginTransaction().replace(R.id.frame,new Fragment1()).commit();

        group = findViewById(R.id.group);
        //为group设置监听
        group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                switch(i){
                            case R.id.but1:
                                getSupportFragmentManager().beginTransaction().replace(R.id.frame,new Fragment1()).commit();
                            break;
                            case R.id.but2:
                                getSupportFragmentManager().beginTransaction().replace(R.id.frame,new Fragment2()).commit();
                            break;
                            case R.id.but3:
                                getSupportFragmentManager().beginTransaction().replace(R.id.frame,new Fragment3()).commit();
                            break;
                            case R.id.but4:
                                getSupportFragmentManager().beginTransaction().replace(R.id.frame,new Fragment4()).commit();
                            break;
                            default:
                            break;
                            }
            }
        });
    }
}

fragment 1布局-----------

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

    android:background="#f89"
    android:orientation="vertical">
<android.support.design.widget.TabLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/tab"
    app:tabGravity="center"
    app:tabIndicatorColor="@color/colorAccent"
    app:tabMode="scrollable"
    app:tabSelectedTextColor="@color/colorPrimaryDark"
    app:tabTextColor="@color/colorPrimary"
    >

android.support.design.widget.TabLayout>
    <android.support.v4.view.ViewPager
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/pager">android.support.v4.view.ViewPager>
LinearLayout>

Fragment1 代码----------

public class Fragment1 extends Fragment{


    private ViewPager pager;
    private TabLayout tab;
    private List list;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.fragment01,container,false);
        //找到控件
        pager = view.findViewById(R.id.pager);
        tab = view.findViewById(R.id.tab);

        //数据
        requestData();
        //为pager设置适配器
        pager.setAdapter(new MyAdapter(getChildFragmentManager()));
        //绑定
        tab.setupWithViewPager(pager);
        //一次加载所有数据
        pager.setOffscreenPageLimit(list.size());
        return view;
    }

    private void requestData() {
        list = new ArrayList<>();
        list.add("数据新闻");
        list.add("快讯");
        list.add("头条");
        list.add("精编公告");
        list.add("美股");
        list.add("港股");
        list.add("基金");
        list.add("理财");

    }

    private class MyAdapter extends FragmentPagerAdapter {


        public MyAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            ContentFragment fragment=new ContentFragment();
            Bundle bundle=new Bundle();
          if(list.get(position).equals("数据新闻")){
              bundle.putString("type","xbsjxw");
          }else if(list.get(position).equals("快讯")){
              bundle.putString("type","txs");
         }else if(list.get(position).equals("头条")){
              bundle.putString("type","toutiao");
          }else if(list.get(position).equals("精编公告")){
              bundle.putString("type","news/mobile/jbgg");
          }else if(list.get(position).equals("美股")){
              bundle.putString("type","news/mobile/mgxw");
         }else if(list.get(position).equals("港股")){
              bundle.putString("type","news/mobile/ggxw");
          }else if(list.get(position).equals("基金")){
              bundle.putString("type","news/mobile/jjxw");
          }else if(list.get(position).equals("理财")){
              bundle.putString("type","news/mobile/lcxw");
          }
            fragment.setArguments(bundle);
            return fragment;
        }

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

        @Override
        public CharSequence getPageTitle(int position) {
            return list.get(position);
        }
    }
}

content_fragment布局----------------

xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:ptr="http://schemas.android.com/apk/res-auto"
    android:background="#f89">
    <com.handmark.pulltorefresh.library.PullToRefreshListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/plist"
        ptr:ptrAnimationStyle="flip"
        ptr:ptrHeaderBackground="#383838"
        ptr:ptrHeaderTextColor="#FFFFFF"

        >com.handmark.pulltorefresh.library.PullToRefreshListView>
LinearLayout>

ContentFragment代码--------------

public class ContentFragment extends Fragment{
    private List list=new ArrayList<>();
    private PullToRefreshListView plist;
    private int ptype=1;
    private String url;
    private String url1;
    private String type;
    private int index=1;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.content_fragment,container,false);

        //找到控件
        plist = view.findViewById(R.id.plist);
        url = "http://mnews.gw.com.cn/wap/data/news/";
        url1 = "/page_"+index+".json";
        //得到bundle
        Bundle bundle = getArguments();
        type = bundle.getString("type");
        requestData();//进入加载数据
        //为plist设置可上啦下拉
        plist.setMode(PullToRefreshBase.Mode.BOTH);
        plist.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2() {
            @Override
            public void onPullDownToRefresh(PullToRefreshBase pullToRefreshBase) {
                ptype=1;
                requestData();
            }



            @Override
            public void onPullUpToRefresh(PullToRefreshBase pullToRefreshBase) {
                ptype=2;
                index++;
                requestData();
            }
        });

        return view;
    }
    private void requestData() {
        //异步加载
        if(NetStateUtil.isConn(getActivity())){
            MyTask myTask=new MyTask(new MyTask.ICallBeak() {
                @Override
                public void getJson(String json) {
                   // Gson gson=new Gson();
                    List lists=new ArrayList<>();
                    try {

                        JSONArray jsonArray = new JSONArray(json);
                        JSONArray data = jsonArray.getJSONObject(0).getJSONArray("data");
                        for (int i = 0; i //创建对象
                            json bean=new json();
                            String img = data.getJSONObject(i).getString("img");
                            String otime = data.getJSONObject(i).getString("otime");
                            String title = data.getJSONObject(i).getString("title");
                            bean.setImg(img);
                            bean.setOtime(otime);
                            bean.setTitle(title);
                            lists.add(bean);
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    if(ptype==1){
                        list.clear();
                    }
                        list.addAll(lists);
                        //关闭头尾布局
                    new Handler().postDelayed(new Thread(new Runnable() {
                        @Override
                        public void run() {
                            plist.onRefreshComplete();
                        }
                    }),1000);
                    //设置适配器
                    MyAdapter adapter=new MyAdapter(getActivity(),list);
                    plist.setAdapter(adapter);

                }

            });
            //请求
            myTask.execute(url+type+url1);
        }else{
            Toast.makeText(getActivity(),"亲，当前没有网络了呢",Toast.LENGTH_SHORT).show();
        }
    }
}

             适配器代码

public class MyAdapter extends BaseAdapter{
    private int ONE=0;
    private int TWO=1;
    private final DisplayImageOptions options;
    Context context;
    List list;
    public MyAdapter(Context context, List list) {
        this.context=context;
        this.list=list;
        options = new DisplayImageOptions.Builder()
                .cacheInMemory(true)//使用内存缓存
                .cacheOnDisk(true)//使用磁盘缓存
                .showImageOnLoading(R.mipmap.ic_launcher)//设置正在下载的图片
                .showImageForEmptyUri(R.mipmap.ic_launcher)//url为空或请求的资源不存在时
                .showImageOnFail(R.mipmap.ic_launcher)//下载失败时显示的图片
                .bitmapConfig(Bitmap.Config.RGB_565)//设置图片色彩模式 1px=2字节
                .imageScaleType(ImageScaleType.EXACTLY)//设置图片的缩放模式
                //.displayer(new RoundedBitmapDisplayer(100))//设置圆角 30代表半径 自定义
                .build();

    }



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

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

    @Override
    public int getViewTypeCount() {
        return 2;
    }

    @Override
    public int getItemViewType(int position){
        String img = list.get(position).getImg();

        if(img==null){
            return ONE;
        }else{
            return TWO;
        }
    }

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

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        int type = getItemViewType(i);
        if(type==ONE){
            ViewHolder holder;
            if(view==null){
                view=View.inflate(context,R.layout.list_layout1,null);
                holder=new ViewHolder();
                holder.image1=view.findViewById(R.id.image01);
                holder.text1=view.findViewById(R.id.text01);
                view.setTag(holder);
            }else{
                holder= (ViewHolder) view.getTag();
            }
            holder.image1.setImageResource(R.drawable.ic_launcher_background);
            holder.text1.setText(list.get(i).getTitle());
            return view;
        }else{
            ViewHolder2 holder2;
            if(view==null){
                view=View.inflate(context,R.layout.list_layout2,null);
                holder2=new ViewHolder2();
                holder2.image2=view.findViewById(R.id.image02);
                holder2.text2=view.findViewById(R.id.text02);
                view.setTag(holder2);
            }else{
                holder2= (ViewHolder2) view.getTag();
            }
            ImageLoader.getInstance().displayImage(list.get(i).getImg(),holder2.image2,options);
            holder2.text2.setText(list.get(i).getTitle());
            return view;
        }

    }
    private class ViewHolder{
        ImageView image1;
        TextView text1;
    }
    private class ViewHolder2{
        ImageView image2;
        TextView text2;
    }

  清单文件

xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.com.yue_kao">
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        android:name=".Applaction">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            intent-filter>
        activity>
    application>

manifest>