替代XListView的下拉刷新、上拉加载

要添加的权限    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />根布局

 <com.handmark.pulltorefresh.library.PullToRefreshListView
       android:id="@+id/plv"
       android:layout_width="match_parent"
       android:layout_height="match_parent"/>
NetWorkUtils
 

public static String getNetjson(String urlString){

try {
URL url = new URL(urlString);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");//若果是get请求可以不用配置; 其他请求必须配置
urlConnection.setConnectTimeout(8000);//设置链接超时间
InputStream inputStream = urlConnection.getInputStream();//获取网络返回的输入流;
//可拼接的字符串
StringBuilder stringBuilder = new StringBuilder();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String temp = "";
while ((temp = bufferedReader.readLine()) != null) {
stringBuilder.append(temp);
temp = "";
}
//这个是网络获取的数据
String data = stringBuilder.toString();
return data;
} catch (IOException e) {
e.printStackTrace();
}

return "";
}

MainActivity/**
 * 接入PullToRefresh
 * 1.引入Library
 * 2.依赖model
 * 3. 布局文件中使用可刷新的控件
 * 4. 设置可刷新监听-->  mPullRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>()
 * 设置可以上拉  mPullRefreshListView.setMode(PullToRefreshBase.Mode.BOTH);
 */
public class MainActivity extends AppCompatActivity {
    String baseUrl = "http://www.93.gov.cn/93app/data.do?channelId=0&startNum=";
    private ArrayList<String> list = new ArrayList();
    private PullToRefreshListView plv;    private int page = 0;
    private ArrayAdapter<String> mAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        plv = (PullToRefreshListView) findViewById(R.id.plv);
        plv.setMode(PullToRefreshBase.Mode.BOTH);//BOTH 设置支持上下拉
        getNetData(0);
        // 数据源  从网络请求数据
        mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list);
        plv.setAdapter(mAdapter);        plv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            /**
             * 下拉刷新
             * @param pullToRefreshBase
             */
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
                list.clear();
                getNetData(0);            }            /**
             * 上拉加载
             * @param pullToRefreshBase
             */
            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
                // 请求新数据, 添加到大集合
                page++;
                getNetData(page);            }
        });
    }    /**
     * 请求网络数据
     * @param page
     */
    private void getNetData( int page) {
        new MAsyncTask().execute(baseUrl+page);
    } class  MAsyncTask extends AsyncTask<String,Void,String>  {     @Override
     protected String doInBackground(String... strings) {
         return NetWordUtils.getNetjson(strings[0]);
     }     @Override
     protected void onPostExecute(String s) {
         super.onPostExecute(s);         Gson gson = new Gson();
         Product product = gson.fromJson(s, Product.class);
         List<Product.DataBean> dataTemp = product.getData();         ArrayList<String> stringList = new ArrayList<>();//初始化一个空的字符串集合
         for (int i = 0; i <dataTemp.size() ; i++) {
             stringList.add(dataTemp.get(i).getTITLE());
         }
         list.addAll(stringList);
         mAdapter.notifyDataSetChanged();
         plv.onRefreshComplete(); //    让刷新头和刷新底部返回
     }
 }
}