FragmentXlistview

package com.example.lenovo.tablayout;
 
/**
 * Created by lenovo on 2018/7/18.
 */
 
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
 
import com.bawei.jane.mxlistview.view.XListView;
import com.google.gson.Gson;
 
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
 
/**
 * 1. 类的用途
 * 2. @author forever
 * 3. @date 2018/7/18 11:37
 */
 
public class Tab0Fragment extends Fragment {
    @Nullable
 
    private List<String> picUrl;
    private XListView xlv;
    private  int pageIndex=1;//第一页的数据
    private String urlpart="http://www.93.gov.cn/93app/data.do?channelId=0&startNum=";
 
    private String url =urlpart + pageIndex;
 
    private MyAdapter adapter;
    private List<Result.DataBean> data = new ArrayList<>();
    private int operType = 1;
    private ViewPager viewpage;
 
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            int index = viewpage.getCurrentItem();
            index++;
            viewpage.setCurrentItem(index);
            sendEmptyMessageDelayed(0,2000);
        }
    };
 
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = View.inflate(getActivity(), R.layout.tab0, null);
//
 
        picUrl = new ArrayList<>();
 
        xlv = view.findViewById(R.id.xlv);
        viewpage = view.findViewById(R.id.vp);
 
        if (NetUtils.isConn(getActivity())) {
            initData();
            MyTask myTask = new MyTask();
            myTask.execute(url);
 
            Toast.makeText(getActivity(), "有网络", Toast.LENGTH_SHORT).show();
            //设置适配器
            viewpage.setAdapter(new MyPagerAdapter(picUrl, getActivity()));
            //设置默认显示页面
            viewpage.setCurrentItem(picUrl.size() * 10);
            //发消息
            handler.sendEmptyMessage(0);
 
        } else {
            NetUtils.openDg(getActivity());
        }
        xlv.setPullRefreshEnable(true);
        xlv.setPullLoadEnable(true);
        xlv.setXListViewListener(new XListView.IXListViewListener() {
            @Override
            public void onRefresh() {
 
                pageIndex = 1;
                url = urlpart + pageIndex;
                //重新赋值
                operType = 1;
                MyTask myTask = new MyTask();
                myTask.execute(url);
 
            }
 
            @Override
            public void onLoadMore() {
//                页数增加
                pageIndex++;
                url = urlpart + pageIndex;
//          重新赋值
                operType = 2;
                Toast.makeText(getActivity(), "加载更多", Toast.LENGTH_SHORT).show();
                MyTask task = new MyTask();
                task.execute(url);
 
            }
 
        });
        return view;
    }
 
    private void initData() {
        picUrl.add("https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=353970577,2929946804&fm=200&gp=0.jpg");
        picUrl.add("https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=3382711420,562977377&fm=27&gp=0.jpg");
        picUrl.add("https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=2267393344,4258926851&fm=27&gp=0.jpg");
        picUrl.add("https://ss1.bdstatic.com/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=1211379323,1253125292&fm=27&gp=0.jpg");
        picUrl.add("https://ss1.bdstatic.com/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=1132229679,4204511222&fm=27&gp=0.jpg");
    }
 
    class MyTask extends AsyncTask<String,Void,String> {
        @Override
        protected String doInBackground(String... strings) {
            StringBuilder builder = new StringBuilder();
            try {
                URL url = new URL(strings[0]);
                HttpURLConnection c = (HttpURLConnection) url.openConnection();
                c.setRequestMethod("GET");
                c.setReadTimeout(5000);
                c.setConnectTimeout(5000);
                if (c.getResponseCode()==200){
                    InputStream inputStream = c.getInputStream();
                    BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
                    String str;
                    while ((str=reader.readLine())!=null){
                        builder.append(str);
                    }
                    reader.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return builder.toString();
        }
 
        @Override
        protected void onPostExecute(String s) {
            Gson gson = new Gson();
            Result result = gson.fromJson(s, Result.class);
 
            if (operType==1){
                data.clear();
            }
            data.addAll(result.getData());
            setAdapter();
            //关闭头尾布局
            if (operType ==1){
                xlv.stopRefresh();
                Date date = new Date(System.currentTimeMillis());//获取当前时间
                SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//格式化时间
                String refreShTime = sf.format(date);
                xlv.setRefreshTime(refreShTime);//设置刷新时间
            }else {
                xlv.stopLoadMore();//关闭尾布局
 
            }
 
        }
    }
    public void setAdapter(){
        if (adapter==null){
            adapter = new MyAdapter(data,getActivity());
            xlv.setAdapter(adapter);
        }else {
            adapter.notifyDataSetChanged();
        }
    }
}

<?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:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:background="#ff0000 "
        android:id="@+id/toutiao"
        android:textColor="#ffffff"
        android:gravity="center"
        android:text="今日头条C"
        android:textSize="30dp"
        android:layout_width="match_parent"
        android:layout_height="60dp" />
    <android.support.design.widget.TabLayout
        android:layout_below="@id/toutiao"
        android:id="@+id/tab"
        android:layout_width="match_parent"
        app:tabTextColor="#00ff96"
        app:tabSelectedTextColor="#ff0033"
        app:tabBackground="@color/colorPrimaryDark"
        android:layout_height="3dp"
        android:layout_weight="1"></android.support.design.widget.TabLayout>
 
    <android.support.v4.view.ViewPager
        android:id="@+id/vp"
 
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="9"></android.support.v4.view.ViewPager>
    </LinearLayout>
    <LinearLayout
        android:background="#f00"
        android:layout_gravity="start"
        android:layout_width="200dp"
        android:layout_height="match_parent"></LinearLayout>
</android.support.v4.widget.DrawerLayout>