XlistView应用(下拉刷新，上拉加载更多)

首先要导入mXlistview模块(一个Modle)让项目依赖mlistview

           MainActivity代码

public class MainActivity extends AppCompatActivity {

    private XListView xlist;
    private int type=1;//类型
    private int index=1;//下标
    private String url="http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=10&page="+index;
    List list = new ArrayList<>();
    private MyAdapter adapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //找到控件
        xlist = findViewById(R.id.xlist);
        //设置上拉下拉
        xlist.setPullLoadEnable(true);
        xlist.setPullRefreshEnable(true);
        //调用加载数据方法
        requestdata();//进页面先加载数据 在加载更多
        //为xlist设置监听
        xlist.setXListViewListener(new XListView.IXListViewListener() {
            @Override
            public void onRefresh() {//刷新 下拉
                type=1;
                index=1;
                url="http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=10&page=1"+index;
                requestdata();
            }



            @Override
            public void onLoadMore() {//加载更多  上拉
                type=2;
                //再次执行，页数增加
                  index++;
                url="http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=10&page=1"+index;
               requestdata();//调用执行请求数据
            }
        });

    }
    //请求数据
    private void requestdata() {
        MyTask myTask=new MyTask();
        myTask.execute(url);
    }
    class MyTask extends AsyncTask{
        @Override
        protected String doInBackground(String... strings) {
            try {
                URL url=new URL(strings[0]);
                HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                urlConnection.setConnectTimeout(5000);
                urlConnection.setReadTimeout(5000);
                urlConnection.setRequestMethod("GET");
                int responseCode = urlConnection.getResponseCode();
                if(responseCode==200){
                    InputStream inputStream = urlConnection.getInputStream();
                    String s = getdata(inputStream);
                    return s;
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            if(s!=null){
                Gson gson=new Gson();
                MyGson myGson = gson.fromJson(s, MyGson.class);
                if(type==1){
                    xlist.stopRefresh();//停止刷新
                    //新建一个时间对象  System.currentTimeMillis()获得系统时间
                    Date date=new Date(System.currentTimeMillis());
                    //新建simple
                    SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd  HH:mm:ss");
                    String format = sdf.format(date);//转换时间类型
                    //设置时间
                    xlist.setRefreshTime(format);
                    list.clear();
                }else{
                    //关闭视图
                    xlist.stopLoadMore();//停止刷新更多
                }
                list.addAll(myGson.getData());
                setAdapter();

            }


        }
    }

    private void setAdapter() {
        if (adapter==null){
            adapter= new MyAdapter(MainActivity.this,list);
            xlist.setAdapter(adapter);
        }else {
            adapter.notifyDataSetChanged();
        }
    }

    private String getdata(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();
    }
}

                                     适配器代码

class MyAdapter extends BaseAdapter{
    private final int ONE_IMAGE=0;
    private final int TWO_IMAGE=1;
    Context context;
    List list;
    private DisplayImageOptions options;
    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 getItemViewType(int position) {
       if(position%2==0){
           return ONE_IMAGE;
       }else{
           return TWO_IMAGE;
       }
    }

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

    @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) {
        int type = getItemViewType(i);
        if(type==ONE_IMAGE){
            ViewHolder1 holder1;
            if(view==null){
                 view=View.inflate(context,R.layout.item1,null);
                holder1=new ViewHolder1();
                holder1.text01=view.findViewById(R.id.list_text01);
                view.setTag(holder1);
            }else{
                holder1= (ViewHolder1) view.getTag();
            }
            holder1.text01.setText(list.get(i).getTitle());
            return view;
        }else{
            ViewHolder2 holder2;
            if(view==null){
                view=View.inflate(context,R.layout.item2,null);
                holder2=new ViewHolder2();
                holder2.text02=view.findViewById(R.id.list_tex02);
                holder2.image02=view.findViewById(R.id.list_image02);
                view.setTag(holder2);
            }else{
                holder2= (ViewHolder2) view.getTag();
            }
            holder2.text02.setText(list.get(i).getTitle());
            ImageLoader.getInstance().displayImage(list.get(i).getImg(),holder2.image02,options);

        }
        return view;
    }
    private class ViewHolder1{
        TextView text01;
    }
    private class ViewHolder2{
        ImageView image02;
        TextView text02;

    }
}

                                       

                MyAplaction代码

public class MyAplaction 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);

    }
}

                         MyGson代码  

（Alt+s把接口数据放进去）

布局代码（MainActivity）

<com.bawei.jane.mxlistview.view.XListView
    android:id="@+id/xlist"
    android:layout_width="match_parent"
    android:layout_height="match_parent">com.bawei.jane.mxlistview.view.XListView>

list_layout1布局

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/list_text01"
   
    android:padding="20dp"/>

list_layout2布局

<ImageView
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:id="@+id/list_image02"
    android:layout_marginLeft="20dp"
    android:layout_marginTop="20dp"/>
<TextView
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:id="@+id/list_tex02"
    android:text="aaaa"
    android:padding="20dp"
    android:layout_marginLeft="20dp"
    android:layout_marginTop="20dp"/>

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.rikao1_5">
<uses-permission android:name="android.permission.INTERNET"/>
    <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=".MyAplaction">
        <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>