PullToRefreshListView上拉刷新下拉加载

导入依赖

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

         xmlns:ptr="http://schemas.android.com/apk/res-auto" 命名的控件
         ptr:ptrDrawable="@drawable/default_ptr_flip":刷新时显示的图片
        ptr:ptrAnimationStyle="flip"：刷新的图片以何种方式显示出来
        ptr:ptrHeaderBackground="#383838"：刷新时头部的布局
        ptr:ptrHeaderTextColor="#FFFFFF"：刷新时头部字体的颜色

1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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" tools:context="com.example.pulltorefresh.MainActivity">



    <com.handmark.pulltorefresh.library.PullToRefreshListView
        xmlns:ptr="http://schemas.android.com/apk/res-auto"
        android:id="@+id/pull_listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        ptr:ptrDrawable="@drawable/default_ptr_flip"
        ptr:ptrAnimationStyle="flip"
        ptr:ptrHeaderBackground="#383838"
        ptr:ptrHeaderTextColor="#FFFFFF"
        ></com.handmark.pulltorefresh.library.PullToRefreshListView>

</LinearLayout>

2.Activity

import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.ListView;

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.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private PullToRefreshListView pullToRefreshListView;
    private HttpUtils httpUtils = HttpUtils.getInstance();
    private String path = "http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=15&page=";
    private int page =1;
    private List<UserBean.DataBean> list = new ArrayList<>();
    private MyBase adapter;
    private Handler handler = new Handler();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //1.定义方法
        initView();

        getData();

    }
    //设置头部底部的视图
    private void initView() {
        //获取资源ID
        pullToRefreshListView = (PullToRefreshListView) findViewById(R.id.pull_listView);

        //2.设置模式   BOTH 可以上拉 下拉  pull_from_end代表上拉，pull_from_start代表下拉
        pullToRefreshListView.setMode(PullToRefreshBase.Mode.BOTH);

        //3.都是布尔类型  第一个如果为true 时  当前设置的就是头部  如果第二个为true设置的就是底部
        final ILoadingLayout startLoadding = pullToRefreshListView.getLoadingLayoutProxy(true,false);
        startLoadding.setPullLabel("下拉刷新");
        startLoadding.setRefreshingLabel("正在刷新");
        startLoadding.setReleaseLabel("放开刷新");
        ILoadingLayout endLoadding = pullToRefreshListView.getLoadingLayoutProxy(false,true);
        endLoadding.setPullLabel("上拉加载");
        endLoadding.setRefreshingLabel("正在加载");
        endLoadding.setReleaseLabel("放开加载");


        //4.接口回调上拉下拉
        pullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            //11.在下拉完成后被回调
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
                page =1;
                getData();
                //12.
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        //必须在异步中完成  在列表没有数据的时候，不再请求接口，调用当前方法
                        pullToRefreshListView.onRefreshComplete();
                    }
                },2000);


                //可以设置刷新的时间....
                startLoadding.setLastUpdatedLabel("上次更新时间:"+new SimpleDateFormat("HH:mm").format(new Date(System.currentTimeMillis())));//last最近的,最后一次update修改/更新

            }
            //11.在上拉完成后被回调
            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {

                page+=1;
                getData();
                //12.
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {

                        pullToRefreshListView.onRefreshComplete();
                    }
                },2000);


            }
        });
        //9.创建适配器
        adapter = new MyBase(list,MainActivity.this);
        pullToRefreshListView.setAdapter(adapter);

    }


    //5.得到数据
    public void getData(){

        final String url = path+page;

        httpUtils.getdata(url);

        //6.接口回调得到数据
        httpUtils.setHttpListener(new HttpUtils.HttpListener() {
            @Override
            public void getjsondata(String json) {
                //开始解析
                Gson gson = new Gson();

                UserBean userBean = gson.fromJson(json, UserBean.class);
                //7.解析出来的数据
                List<UserBean.DataBean> data = userBean.getData();

                //8.在list集合中添加数据
                Log.i("TAG",data.size()+"");
                //如果是第一页的数据 清空集合
                if(page == 1){
                    list.clear();
                }
                //将请求到的数据刷新
                list.addAll(data);
                //10.刷新适配器
                adapter.notifyDataSetChanged();

            }
        });
    }
}