PullToRefreshListView的使用

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PullToRefresh是很多项目都使用的刷新加载框架，大多数情况下我们不需要对源码做任何调整，它提供的强大配置功能就足以满足我们的需求，而且框架已经相当稳定，正因如此受到大家的欢迎！

PullToRefresh需要和module进行绑定，步骤如下：

pullToRefresh的导入

首先，点击new按钮 -> import Module

然后在 New Module界面选择已经在本地的含有源代码的pullToRefresh。

打开如下图所示的open Module Settings 按钮

点击app中的Dependencies 中右边框的"+"按钮，选择第三个，如下所示

选择Modules : pullToRefreshLibrary ,点击OK
然后在build.gradle(Module:app)或者你自己要写的那个android 程序的根文件夹的build.gradle中加入下面一句话

compile project(':pullToRefreshLibrary')

自此，pullToRefresh已经导入成功，可以新建一个pullToRefrenshListView验证一下。

pullToRefreshListView的基本使用

布局文件：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <com.handmark.pulltorefresh.library.PullToRefreshListView        xmlns:ptr="http://schemas.android.com/apk/res-auto"        android:layout_height="match_parent"        android:layout_width="match_parent"        android:id="@+id/refresh_list_view"        ptr:ptrDrawable="@drawable/default_ptr_flip"        ptr:ptrAnimationStyle="flip"        ptr:ptrHeaderBackground="#383838"        ptr:ptrHeaderTextColor="#FFFFFF"  >    </com.handmark.pulltorefresh.library.PullToRefreshListView></LinearLayout>

，，，，，，，，，，，，，，，，listView的具体实现的代码

，，，，，，，，，先有一个主界面，然后再主界面中分出子布局（fragment）

package yaozhipu.bwei.com.week1.fragment;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;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;import yaozhipu.bwei.com.week1.R;import yaozhipu.bwei.com.week1.Utils.JsonCallBack;import yaozhipu.bwei.com.week1.Utils.NetDataUtils;import yaozhipu.bwei.com.week1.halper.DatadateBean;import yaozhipu.bwei.com.week1.imag.ListViewAdapter;/** * Created by lenovo on 2017/10/18. */public class FragmentListView extends Fragment {    private PullToRefreshListView refreshListView;    private List<DatadateBean.DataBean.EssayBean> list = new ArrayList<>();    private ListViewAdapter myAdapter;    private int num=1;    private ILoadingLayout startLabels;    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View view = inflater.inflate(R.layout.layout_listview, container, false);        refreshListView = (PullToRefreshListView) view.findViewById(R.id.refresh_list_view);        return view;    }    @Override    public void onActivityCreated(@Nullable Bundle savedInstanceState) {        super.onActivityCreated(savedInstanceState);//1.设置listView的适配器        getDataFrom(); //2.设置刷新模式        /*设置pullToRefreshListView的刷新模式，BOTH代表支持上拉和下拉，PULL_FROM_END代表上拉,PULL_FROM_START代表下拉 */        refreshListView.setMode(PullToRefreshBase.Mode.BOTH);//3.通过getLoadingLayoutProxy 方法来指定上拉和下拉时显示的状态的区别(也就是设置向下拉的时候头部里面显示的文字)        //此时这里设置的是下拉刷新的时候显示的文字,所以第一个设置true表示现在是刷新,第二个设置为false        startLabels = refreshListView.getLoadingLayoutProxy(true, false);        startLabels.setPullLabel("下拉刷新...");        startLabels.setRefreshingLabel("正在刷新...");        startLabels.setReleaseLabel("放开刷新...");        ILoadingLayout endLabels = refreshListView.getLoadingLayoutProxy(false, true);        endLabels.setPullLabel("上拉刷新...");        endLabels.setRefreshingLabel("正在载入...");        endLabels.setReleaseLabel("放开刷新...");        refreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {//下拉刷新的时候调用的方法....请求第一页的数据,清空之前的数据,然后再添加设置适配器                        @Override            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {         //下拉刷新....请求第一页的数据,清空之前的数据,然后再添加设置适配器                                   getReshData();            }//上拉刷新的时候调用的方法..page++,然后在请求数据            @Override            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {//上拉刷新/加载...加载的时候页数++                                num++;                getDataFrom();            }        });    }    public void getDataFrom() {        NetDataUtils.getData("http://v3.wufazhuce.com:8000/api/reading/index/?version=3.5.0&platform=android", getActivity(), new JsonCallBack() {            @Override            public void getJsonString(String json) {                //解析                Gson gson = new Gson();                DatadateBean datadateBean = gson.fromJson(json, DatadateBean.class);                Log.i("---",datadateBean.getData()+"---");                list.addAll(datadateBean.getData().getEssay());                setAdapter();                refreshListView.onRefreshComplete();            }        });    }    private void setAdapter() {        if (myAdapter == null){            myAdapter = new ListViewAdapter(getActivity(), list);            refreshListView.setAdapter(myAdapter);        }else{            myAdapter.notifyDataSetChanged();        }    }    public void getReshData() {        NetDataUtils.getData("http://v3.wufazhuce.com:8000/api/reading/index/?version=3.5.0&platform=android", getActivity(), new JsonCallBack() {            @Override            public void getJsonString(String json) {                 //解析                                 Gson gson = new Gson();                DatadateBean datadateBean = gson.fromJson(json, DatadateBean.class);               //先清空一下数据                list.clear();                                 //添加到集合的最前边,,,,(0,,,,)                 list.addAll(0,datadateBean.getData().getEssay());                setAdapter();                refreshListView.onRefreshComplete();                startLabels.setLastUpdatedLabel("上次更新时间:"+new SimpleDateFormat("HH:mm").format(new Date(System.currentTimeMillis())));            }        });    }}

、、、、、listView进行加载，并且使用多条目，以及图片适配

import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import com.nostra13.universalimageloader.core.ImageLoader;import java.util.List;import yaozhipu.bwei.com.week1.R;import yaozhipu.bwei.com.week1.halper.DatadateBean;/** * Created by lenovo on 2017/10/18. */public class ListViewAdapter extends BaseAdapter{    private Context context;    private List<DatadateBean.DataBean.EssayBean> list;    private int image1=0;    private int image2=1;    public ListViewAdapter(Context context, List<DatadateBean.DataBean.EssayBean> list) {        this.context=context;        this.list=list;    }    @Override    public int getCount() {        return list.size();    }    @Override    public Object getItem(int position) {        return list.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public int getItemViewType(int position) {        if (position % 2==0){            return image1;        }        return image2;    }    //返回2个布局文件    @Override    public int getViewTypeCount() {        return 2;    }    //优化，进行多条目加载    @Override    public View getView(int position, View convertView, ViewGroup parent) {        if (getItemViewType(position)==image1) {            ViewHolder viewHolder = null;            if (convertView == null) {                viewHolder = new ViewHolder();                convertView = View.inflate(context, R.layout.layout_list, null);                viewHolder.image = (ImageView) convertView.findViewById(R.id.image);                viewHolder.title = (TextView) convertView.findViewById(R.id.title);                viewHolder.tiem = (TextView) convertView.findViewById(R.id.time);                convertView.setTag(viewHolder);            } else {                viewHolder = (ViewHolder) convertView.getTag();            }            viewHolder.tiem.setText(list.get(position).getHp_makettime());            viewHolder.title.setText(list.get(position).getHp_title());            ImageLoader.getInstance().displayImage(list.get(position).getStart_video(), viewHolder.image, ImageLOaderUtils.getcrioption());        }else if (getItemViewType(position) == image2){            Holder holder = null;            if (convertView == null) {                holder = new Holder();                convertView = View.inflate(context, R.layout.layout_lists, null);                holder.title = (TextView) convertView.findViewById(R.id.title);                holder.tiem = (TextView) convertView.findViewById(R.id.time);                convertView.setTag(holder);            } else {                holder = (Holder) convertView.getTag();            }            holder.tiem.setText(list.get(position).getHp_makettime());            holder.title.setText(list.get(position).getHp_title());        }        return convertView;    }    class ViewHolder{        ImageView image;        TextView title;        TextView tiem;    }    class Holder{        TextView title;        TextView tiem;    }}

，，，，，，，，，，，，，，，示例如下

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