PullToF

package com.bawie.com.shanggeyueyuekao;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.GridView;

import android.widget.ListView;
import android.widget.TextView;


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

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

public class Main2Activity extends AppCompatActivity {
    private int cid;
    private String url="http://120.27.23.105/product/getProductCatagory?cid="+cid;
    private PullToRefreshListView pulltoF;
    private Bean2 bean2;
    private  List<Bean2.DataBean> data = new ArrayList<>();
    private GridView grid_view;
    private TextView htext;
    private int operType=1;
    private int pageIndex=cid;
    private Hmyadapter hmyadapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        Intent intent = getIntent();

        cid = intent.getIntExtra("cid", this.cid);
        //list_view = findViewById(R.id.list_view);
        grid_view = findViewById(R.id.grid_view);
        pulltoF = findViewById(R.id.pulltoF);
        htext = findViewById(R.id.htext);
        initplv();
        getlist();


    }

    private void initplv() {
        pulltoF.setMode(PullToRefreshListView.Mode.BOTH);

        ILoadingLayout startLabels = pulltoF.getLoadingLayoutProxy(true, false);
        startLabels.setPullLabel("下拉刷新");//第一次下拉时显示的文字
        startLabels.setRefreshingLabel("正在拉");//下拉的过程中显示的文字
        startLabels.setReleaseLabel("放开刷新");//不能在下拉时，显示的文字

        ILoadingLayout endLabels = pulltoF.getLoadingLayoutProxy(false, true);
        endLabels.setPullLabel("上拉刷新");
        endLabels.setRefreshingLabel("正在载入...");
        endLabels.setReleaseLabel("放开刷新...");

        pulltoF.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
                operType =1;

                url="http://120.27.23.105/product/getProductCatagory?cid="+cid;
                getlist();
            }

            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
                operType =2;

                url="http://120.27.23.105/product/getProductCatagory?cid="+cid;
                getlist();
            }
        });
    }

    private void getlist() {
        if(NetStateUtil.isConn(this)){
            ListMyTask listMyTask=new ListMyTask(new ListMyTask.ListIcall() {



                @Override
                public void ListUpdatejson(String strjson) {
                    Gson gson=new Gson();
                    Bean2  bean2 = gson.fromJson(strjson, Bean2.class);

                    if(operType==1){
                        data.clear();
                   }
                   data.addAll(bean2.getData());

                    setAdapter();

                    pulltoF.onRefreshComplete();
                }
            });

            listMyTask.execute("http://120.27.23.105/product/getProductCatagory?cid="+cid);
         }else{
            NetStateUtil.showNoNetWorkDlg(this);
        }
  }

    private void setAdapter() {
        if(hmyadapter==null){
            hmyadapter = new Hmyadapter(this,data);
            pulltoF.setAdapter(hmyadapter);
        }else{
            hmyadapter.notifyDataSetChanged();
        }


    }

}

==========================================================================================================================================================================================================
package com.bawie.com.shanggeyueyuekao;

import android.os.AsyncTask;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

/**
 * Created by Administrator on 2018/1/12 0012.
 */

public class ListMyTask extends AsyncTask<String,Void,String> {


    private ListIcall listIcall;

    String str="";
    public ListMyTask(ListIcall listIcall) {
        this.listIcall = listIcall;
    }
    @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();
                str = ListStreamToString.listStreamToString(inputStream,"utf-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return str;
    }

    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);
        listIcall.ListUpdatejson(s);
    }

    public interface ListIcall{
        void ListUpdatejson(String strjson);
    }
}
==========================================================================================================================================================================================================
布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:ptr="http://schemas.android.com/apk/res-auto"
    tools:context="com.bawie.com.shanggeyueyuekao.Main2Activity">

<com.handmark.pulltorefresh.library.PullToRefreshListView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/pulltoF"
    ptr:ptrDrawable="@drawable/default_ptr_flip"
    ptr:ptrAnimationStyle="flip"
    ptr:ptrHeaderBackground="#383838"
    ptr:ptrHeaderTextColor="#FFFFFF"
    >
</com.handmark.pulltorefresh.library.PullToRefreshListView>
</RelativeLayout>