XListView上拉刷新，下拉加载

导入XListView工具类：{File>ImportModule...>导入工具类地址》》》》导完之后右键需要用到工具类的工程>Open Module Settings>Dependencies>工具类>确定OK}加载权限：<uses-permission android:name="android.permission.INTERNET"></uses-permission>

布局：<com.bawei.jane.mxlistview.view.XListView    android:layout_height="match_parent"    android:layout_width="match_parent"    android:id="@+id/xlv"/>=====================================================================主要代码：

　　 private XListView xlv;    private int pageIndex=1;    private  String urlpart="http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=10&page=";    private String url=urlpart+pageIndex;    private MyAdapter adapter;    private List<Result.DataBean> data=new ArrayList<>();    //操作类型 1：刷新操作  2：加载更多的操作    private int operType=1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);//查找控件        xlv = findViewById(R.id.xlv);        //对xlistview进行设置        xlv.setPullLoadEnable(true);//上拉加载更多        xlv.setPullRefreshEnable(true);//下拉刷新        //设置接口        xlv.setXListViewListener(new XListView.IXListViewListener() {            @Override            public void onRefresh() {//刷新                //刷新时，重新请求第1页的数据                pageIndex=1;                url=urlpart+pageIndex;                //重新赋值                operType=1;                MyTask myTask=new MyTask();                myTask.execute(url);            }            @Override            public void onLoadMore() {//加载更多                //页数增加                pageIndex++;                url=urlpart+pageIndex;                //重新赋值                operType=2;//加载更多                Log.d("zzz","loadMore:"+url);                MyTask task=new MyTask();                task.execute(url);            }        });        //进行网络请求        MyTask myTask=new MyTask();        myTask.execute(url);    }    class MyTask extends AsyncTask<String,Void,String> {        @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");                if(urlConnection.getResponseCode()==200){                    //获取数据                    InputStream inputStream = urlConnection.getInputStream();                    String s = StreamToString.streamToStr(inputStream, "utf-8");                    Log.d("zzz","---:"+s);                    return s;                }            } catch (Exception e) {                e.printStackTrace();            }            return null;        }        @Override        protected void onPostExecute(String s) {            Gson gson = new Gson();            Result result = gson.fromJson(s, Result.class);            //data = result.getData();            if (operType == 1) {//代表刷新操作                data.clear();//清空原有的集合数据            }            //增加新的数据集合到原来的集合对象中            data.addAll(result.getData());            setAdapter();            if (operType == 1) {                xlv.stopRefresh();//关闭头布局                Date date = new Date(System.currentTimeMillis());                SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");                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,MainActivity.this);            xlv.setAdapter(adapter);        }else{            adapter.notifyDataSetChanged();        }    }====================================================================

解析类：Result

public class Result {

json解析类（快捷键ALT+S）GsonFormt

}

======================================================================适配器类：

class MyAdapter extends BaseAdapter{    private List<Result.DataBean> data;    private Context context;    public MyAdapter(List<Result.DataBean> data, Context context) {        this.data = data;        this.context = context;    }    @Override    public int getCount() {        return data.size();    }    @Override    public Object getItem(int i) {        return data.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.item,null);            holder=new ViewHolder();            holder.img=view.findViewById(R.id.img);            holder.textView=view.findViewById(R.id.tv);            view.setTag(holder);        }else{            holder=(ViewHolder) view.getTag();        }        holder.textView.setText(data.get(i).getTitle());        return view;    }    class ViewHolder{        ImageView img;        TextView textView;    }}====================================================================适配器中的布局

<RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"    android:layout_height="match_parent">    <ImageView        android:layout_height="80dp"        android:layout_width="80dp"        android:id="@+id/img"/>    <TextView        android:layout_height="wrap_content"        android:layout_width="wrap_content"        android:id="@+id/tv"        android:layout_toRightOf="@+id/img"/></RelativeLayout>================================================================

工具类：StreamToString

class StreamToString {    public static String streamToStr(InputStream inputStream, String chartSet){        StringBuilder builder=new StringBuilder();        try {            BufferedReader br=new BufferedReader(new InputStreamReader(inputStream,chartSet));            String con;            while ((con=br.readLine())!=null){                builder.append(con);            }            br.close();            return builder.toString();        } catch (Exception e) {            e.printStackTrace();        }        return "";    }}=====================================================================