XListView上拉刷新，下拉加載

例題：XListView上拉刷新，下拉加載


導入XListView工具類：{File>ImportModule...>導入工具類地址》》》》導完以後右鍵須要用到工具類的工程>Open Module Settings>Dependencies>工具類>肯定OK}





加載權限：<uses-permission android:name="android.permission.INTERNET"></uses-permission>

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

　　 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<>();
    //操做類型 1：刷新操做  2：加載更多的操做
    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);
        //對xlistview進行設置
        xlv.setPullLoadEnable(true);//上拉加載更多
        xlv.setPullRefreshEnable(true);//下拉刷新
        //設置接口
        xlv.setXListViewListener(new XListView.IXListViewListener() {
            @Override
            public void onRefresh() {//刷新
                //刷新時，從新請求第1頁的數據
                pageIndex=1;
                url=urlpart+pageIndex;
                //從新賦值
                operType=1;
                MyTask myTask=new MyTask();
                myTask.execute(url);
            }
            @Override
            public void onLoadMore() {//加載更多
                //頁數增長
                pageIndex++;
                url=urlpart+pageIndex;
                //從新賦值
                operType=2;//加載更多
                Log.d("zzz","loadMore:"+url);
                MyTask task=new MyTask();
                task.execute(url);
            }
        });
        //進行網絡請求
        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){
                    //獲取數據
                    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) {//表明刷新操做
                data.clear();//清空原有的集合數據
            }
            //增長新的數據集合到原來的集合對象中
            data.addAll(result.getData());
            setAdapter();
            if (operType == 1) {
                xlv.stopRefresh();//關閉頭佈局
                Date date = new Date(System.currentTimeMillis());
                SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                String refreshTime = sf.format(date);
                xlv.setRefreshTime(refreshTime);//設置刷新時間
            } else {
                xlv.stopLoadMore();//關閉尾佈局
            }
        }
    }
    public void setAdapter(){
        if(adapter==null){
            adapter = new MyAdapter(data,MainActivity.this);
            xlv.setAdapter(adapter);
        }else{
            adapter.notifyDataSetChanged();
        }
    }
====================================================================

解析類：Result

public class Result {

json解析類（快捷鍵ALT+S）GsonFormt

}

======================================================================
適配器類：

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;
    }
}
====================================================================
適配器中的佈局

<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>

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工具類：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 "";    }}=====================================================================