使用PullToRefreshScrollView实现无线轮播和ListView同时刷新加载

之前做上拉加载下拉刷新的时候使用PullToRefreshListView，非常方便，之后在ListView的上方加了一个轮播图，希望可以实现下拉的头部在轮播图的上方，就发现了PullToRefreshScrollView，用法和PullToRefreshListView基本上差不多。
xml布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:ptr="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <com.handmark.pulltorefresh.library.PullToRefreshScrollView        android:id="@+id/ptr_lv"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_weight="1"        android:orientation="vertical"        ptr:ptrAnimationStyle="flip"        ptr:ptrDrawable="@drawable/default_ptr_flip"        ptr:ptrHeaderBackground="#383838"        ptr:ptrHeaderTextColor="#FFFFFF">        <LinearLayout            android:layout_width="match_parent"            android:layout_height="match_parent"            android:orientation="vertical">            <android.support.v4.view.ViewPager                android:id="@+id/vp_img"                android:layout_width="match_parent"                android:layout_height="200dp"></android.support.v4.view.ViewPager>            <wangxuewei.bwie.com.wangxuewei1510c20171023.MyListView                android:id="@+id/lv"                android:layout_width="match_parent"                android:layout_height="match_parent"></wangxuewei.bwie.com.wangxuewei1510c20171023.MyListView>        </LinearLayout>    </com.handmark.pulltorefresh.library.PullToRefreshScrollView></LinearLayout>

这里是把ViewPager和ListView放在了ScrollView中间，这个MyListView是自己定义的一个ListView,因为使用普通的ListView会有一点问题，下面会说，ViewPager也可以换成Banner，不过PullToRefreshScrollView中间一样要有一个布局包起来

这里是写在了Fragment中的代码

package fragments;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.support.v4.view.ViewPager;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ScrollView;import com.google.gson.Gson;import com.handmark.pulltorefresh.library.ILoadingLayout;import com.handmark.pulltorefresh.library.PullToRefreshBase;import com.handmark.pulltorefresh.library.PullToRefreshScrollView;import java.util.ArrayList;import java.util.List;import adapters.ImgAdapter;import adapters.LvAdapter;import bean.Results;import utils.MyTask;import wangxuewei.bwie.com.wangxuewei1510c20171023.MyListView;import wangxuewei.bwie.com.wangxuewei1510c20171023.R;/** * Created by jim on 2017/10/23. */public class Tab_TuiJian extends Fragment {    private List<String> img_list;    private ViewPager vp_img;    private int index = 0;    private int flag = 1;    private List<Results.DataBean> lists = new ArrayList<>();    private Handler myHandler = new Handler();    private Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            if (msg.what == 0) {                index++;                vp_img.setCurrentItem(index);                handler.sendEmptyMessageDelayed(0, 3500);            }        }    };    private PullToRefreshScrollView ptr_lv;    private LvAdapter adapter;    private MyListView lv;    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View view = inflater.inflate(R.layout.vp_tuijian, null);        vp_img = (ViewPager) view.findViewById(R.id.vp_img);        ptr_lv = (PullToRefreshScrollView) view.findViewById(R.id.ptr_lv);        lv = (MyListView) view.findViewById(R.id.lv);        return view;    }    @Override    public void onActivityCreated(@Nullable Bundle savedInstanceState) {        super.onActivityCreated(savedInstanceState);        //设置无线轮播        setImgVp();        //初始化数据        getNetData();        //设置listView列表        setPtrListView();    }    //加载网络数据    private void getNetData() {        MyTask myTask = new MyTask(new MyTask.Icallbacks() {            @Override            public void updateUiByjson(String jsonstr) {                Gson gson = new Gson();                Results results = gson.fromJson(jsonstr, Results.class);                List<Results.DataBean> data = results.getData();                lists.addAll(data);        //设置适配器                setAdapter();            }        });        myTask.execute("http://www.93.gov.cn/93app/data.do?channelId=0&startNum=0");    }    //刷新方法    private void addtoTop() {        lists.clear();        getNetData();    }    //加载方法    private void addtoBottom() {        MyTask myTask = new MyTask(new MyTask.Icallbacks() {            @Override            public void updateUiByjson(String jsonstr) {                Gson gson = new Gson();                Results results = gson.fromJson(jsonstr, Results.class);                List<Results.DataBean> data = results.getData();                lists.addAll(data);                setAdapter();            }        });        flag += 20;        myTask.execute("http://www.93.gov.cn/93app/data.do?channelId=0&startNum=" + flag);    }    //设置适配器    private void setAdapter() {        if (adapter == null) {            Log.d("zzz", lists.size() + "条数据");            adapter = new LvAdapter(lists, getActivity());            lv.setAdapter(adapter);        } else {            adapter.notifyDataSetChanged();        }    }//配置上拉加载，下拉刷新    private void setPtrListView() {    //同时支持上拉加载下拉刷新        ptr_lv.setMode(PullToRefreshBase.Mode.BOTH);        //配置刷新的设置        ILoadingLayout startLabels = ptr_lv.getLoadingLayoutProxy(true, false);        startLabels.setPullLabel("下拉刷新");        startLabels.setRefreshingLabel("正在拉");        startLabels.setReleaseLabel("放开刷新");        ILoadingLayout endLabels = ptr_lv.getLoadingLayoutProxy(false, true);        endLabels.setPullLabel("上拉刷新");        endLabels.setRefreshingLabel("正在载入...");        endLabels.setReleaseLabel("放开刷新...");    //刷新监听        ptr_lv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ScrollView>() {            @Override            public void onPullDownToRefresh(PullToRefreshBase<ScrollView> refreshView) {                addtoTop();                myHandler.postDelayed(new Runnable() {                    @Override                    public void run() {                        //刷新完成，必须在异步下完成                        ptr_lv.onRefreshComplete();                    }                }, 2000);            }            @Override            public void onPullUpToRefresh(PullToRefreshBase<ScrollView> refreshView) {                //加载更多的数据，添加到集合列表的最后面                addtoBottom();                myHandler.postDelayed(new Runnable() {                    @Override                    public void run() {                        //刷新完成，必须在异步下完成                        ptr_lv.onRefreshComplete();                    }                }, 2000);            }        });    }//加载轮播图的的资源文件    private void setImgVp() {        //加载图片数据        img_list = new ArrayList<>();        img_list.add("http://pic8.nipic.com/20100701/5290458_114840036316_2.jpg");        img_list.add("http://pic2.nipic.com/20090424/1468853_230119053_2.jpg");        img_list.add("http://img3.3lian.com/2013/s1/20/d/57.jpg");        img_list.add("http://pic39.nipic.com/20140226/18071023_164300608000_2.jpg");        img_list.add("http://a0.att.hudong.com/15/08/300218769736132194086202411_950.jpg");        vp_img.setAdapter(new ImgAdapter(img_list, getActivity()));        vp_img.setCurrentItem(index);        handler.sendEmptyMessageDelayed(0, 3500);    }}

之前说ListView是使用的自定义的MyLIstView,使用默认的ListView的话可能会出现只加载一条数据的情况，我们的ListVIew是包起来的，所以可能得不到我们ListView的高度，所以无法正常加载我们的ListView，就需要我们自己定义一个MyListView，通过一个方法去得到我们的高

自定义的ListView

package wangxuewei.bwie.com.wangxuewei1510c20171023;import android.content.Context;import android.util.AttributeSet;import android.widget.ListView;/** * Created by jim on 2017/10/23. */public class MyListView extends ListView {    public MyListView(Context context) {        super(context);    }    public MyListView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public MyListView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,                MeasureSpec.AT_MOST);        super.onMeasure(widthMeasureSpec, expandSpec);    }}

创建一个类继承我们的ListView，重写方法，onMeasure就是我们解决这个问题的主要方法，这里有解释，解决ListView与ScollView冲突问题
其他的适配器需要自己去书写了。