PullToRefresh上拉加载下拉刷新

  //添加依赖:

 compile 'com.github.userswlwork:pull-to-refresh:1.0.0'

 //布局文件使用控件

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

//具体代码

package com.wzq.pulltorefreshdemo;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

import java.util.ArrayList;
import java.util.List;

/**
 * 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);
        // find
        plv = (PullToRefreshListView) findViewById(R.id.plv);
        plv.setMode(PullToRefreshBase.Mode.BOTH);//上下拉都支持;
        // 设置adapter
        mAdapter = new ArrayAdapter<>(MainActivity.this,
                android.R.layout.simple_list_item_1, list);
        plv.setAdapter(mAdapter);
        //请求网络
        getNetData(0);
        //处理上拉和下拉的操作;
        plv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            // 下拉刷新
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
                list.clear();
                getNetData(0);
            }

            //上拉加载
            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
                page++;
                getNetData(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
     }
 }


}