安卓今日头条的框架的搭建

主要的思路：

第一、在主的activity中写DrawerLayout加Viewpager（vp）实现侧拉的功能

写viewpager(vp1)加载四个Fragment

第二，在第一个Fragment中加载TabLayout与Viewpager实现导航栏的滑动

写一个viewpager与一个下圆点的联动，在写个XListView实现解析后新闻条目的上拉加载，下拉刷新，gson的架包

在适配器中判断子条目的不同布局，ImageLoader加载图片（需要使用universal_Imager_Loader的架包）

//activty_main的布局

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/dl"android:layout_width="match_parent"android:layout_height="match_parent">
<LinearLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"><android.support.v4.view.ViewPagerandroid:layout_width="match_parent"android:layout_height="690dp"android:id="@+id/vp"android:layout_weight="2"/><RadioGroupandroid:layout_width="match_parent"android:layout_height="40dp"android:id="@+id/rg"android:layout_weight="8"android:orientation="horizontal"><RadioButtonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/rb1"android:text="新闻"android:layout_margin="15dp"android:textSize="20sp"android:button="@null"android:layout_gravity="center"android:gravity="center"android:checked="true"android:layout_weight="1"android:background="@drawable/se"/><RadioButtonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/rb2"android:text="关注"android:layout_margin="15dp"android:textSize="20sp"android:button="@null"android:layout_gravity="center"android:gravity="center"android:layout_weight="1"android:background="@drawable/se"/><RadioButtonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/rb3"android:text="动态"android:layout_margin="15dp"android:textSize="20sp"android:button="@null"android:layout_gravity="center"android:gravity="center"android:layout_weight="1"android:background="@drawable/se"/><RadioButtonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_weight="1"android:id="@+id/rb4"android:text="设置"android:layout_margin="15dp"android:textSize="20sp"android:button="@null"android:layout_gravity="center"android:gravity="center"android:background="@drawable/se"/></RadioGroup>
</LinearLayout><ListViewandroid:layout_width="200dp"android:layout_height="match_parent"android:id="@+id/lv"android:background="#fff"android:entries="@array/news"android:layout_gravity="left"></ListView>
</android.support.v4.widget.DrawerLayout>

//MainActivit

//在drawale包下创建selector.xml的文件控件按钮被选中的颜色

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:drawable="@color/colorPrimary"/>
</selector>

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.RadioGroup;import com.example.shenxuesong.jinritoutiao.Adapter.MyAdapter;
import com.example.shenxuesong.jinritoutiao.Fragment.Fragment01;
import com.example.shenxuesong.jinritoutiao.Fragment.Fragment02;
import com.example.shenxuesong.jinritoutiao.Fragment.Fragment03;
import com.example.shenxuesong.jinritoutiao.Fragment.Fragment04;import java.util.ArrayList;
import java.util.List;public class MainActivity extends FragmentActivity implements RadioGroup.OnCheckedChangeListener{private ViewPager vp;private RadioGroup rg;private List<Fragment>list=new ArrayList<Fragment>();private ListView lv;private DrawerLayout dl;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//查找组件vp=(ViewPager)findViewById(R.id.vp);rg=(RadioGroup)findViewById(R.id.rg);lv=(ListView)findViewById(R.id.lv) ;dl=(DrawerLayout)findViewById(R.id.dl);//造数据list.add(new Fragment01());list.add(new Fragment02());list.add(new Fragment03());list.add(new Fragment04());//设置适配器MyAdapter myAdapter = new MyAdapter(getSupportFragmentManager(),list);vp.setAdapter(myAdapter);//实现侧拉的功能init();//设置viewpager的监听事件，使vp与rg有联动效果vp.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {@Overridepublic void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}@Overridepublic void onPageSelected(int position) {switch (position){case 0:rg.check(R.id.rb1);break;case 1:rg.check(R.id.rb2);break;case 2:rg.check(R.id.rb3);break;case 3:rg.check(R.id.rb4);break;}}@Overridepublic void onPageScrollStateChanged(int state) {}});rg.setOnCheckedChangeListener(this);}@Overridepublic void onCheckedChanged(RadioGroup radioGroup, int i) {switch (i) {case R.id.rb1:vp.setCurrentItem(0);break;case R.id.rb2:vp.setCurrentItem(1);break;case R.id.rb3:vp.setCurrentItem(2);break;case R.id.rb4:vp.setCurrentItem(3);break;}}private void init() { //打开侧拉dl.openDrawer(lv);lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {}});}}

//给viewpager写适配器

public class MyAdapter extends FragmentPagerAdapter {private List<Fragment> list;public MyAdapter(FragmentManager fm, List<Fragment> list) {super(fm);this.list = list;}@Overridepublic int getCount() {return list.size();}@Overridepublic Fragment getItem(int position) {return list.get(position);}}

//写四个Fragment的类和布局

主要的操作都在Fragment01中下面就着重对其进行展示(TabLayout与ViewPagerj结合使用，实现导航菜单的滑动功能)

fragment01的布局 TabLayout需要导包design

<?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"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/dl"><!--实现导航栏的滑动功能--><android.support.design.widget.TabLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/table"app:tabGravity="center"app:tabIndicatorColor="#f00"app:tabMode="scrollable"android:background="#22f"app:tabSelectedTextColor="#ff0000"app:tabTextColor="#fff"></android.support.design.widget.TabLayout><android.support.v4.view.ViewPagerandroid:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/pager"/></LinearLayout>

//Fragment01实现航栏的滑动功能

import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;import com.example.shenxuesong.jinritoutiao.R;import java.util.ArrayList;
import java.util.List;public class Fragment01 extends Fragment  {private TabLayout tab;private ViewPager vp1;private List<String> list=new ArrayList<String>();//收集标题@Overridepublic View onCreateView(LayoutInflater inflater,  ViewGroup container, Bundle savedInstanceState) {View view = inflater.inflate(R.layout.fragment01, container,false);//查找控件tab = (TabLayout) view.findViewById(R.id.table);vp1 = (ViewPager) view.findViewById(R.id.pager);//tab的标题list.add("头条");list.add("社会");list.add("国内");list.add("国际");list.add("娱乐");list.add("体育");list.add("军事");list.add("科技");list.add("财经");list.add("时尚");//tablayout和viewpager关联tab.setupWithViewPager(vp1);//设置viewpager适配器vp1.setAdapter(new FragmentPagerAdapter(getActivity().getSupportFragmentManager()) {@Overridepublic CharSequence getPageTitle(int position) {return list.get(position);}@Overridepublic Fragment getItem(int position) {//实例化一个Fragment加载XlistviewNewFragment  newfragment = new NewFragment();Bundle bundle = new Bundle();if(list.get(position).equals("头条")){bundle.putString("name","top");}elseif(list.get(position).equals("社会")){bundle.putString("name","shehui");}elseif(list.get(position).equals("国内")){bundle.putString("name","guonei");}elseif(list.get(position).equals("国际")){bundle.putString("name","guoji");}elseif(list.get(position).equals("娱乐")){bundle.putString("name","yule");}elseif(list.get(position).equals("财经")){bundle.putString("name","caijing");}elseif(list.get(position).equals("军事")){bundle.putString("name","junshi");}elseif(list.get(position).equals("科技")){bundle.putString("name","keji");}elseif(list.get(position).equals("体育")){bundle.putString("name","tiyu");}elseif(list.get(position).equals("时尚")){bundle.putString("name","shishang");}//activity与fragment 1.getset，2.接口回调，3.setArguments ,getAragumentsnewfragment.setArguments(bundle);//相当于加载了一个Fragmentreturn newfragment;}@Overridepublic int getCount() {return list.size();}});return view;}}

//NewFragment实现了所有新闻的展示，它是替换了Fragment01,

在此类中会运用到网络请解析json数据、XListview、ImageLoader等知识点

//XListView的依赖包（配置下面的两句依赖就可以实现XListView ）

maven{url'https://jitpack.io'}

compile 'com.github.ForgiveAll:Xlistview:v1.0'

newFragment的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><!--蓝色部分实现是自动轮播的图片、图片上的标题、小圆点--><android.support.v4.view.ViewPagerandroid:layout_width="wrap_content"android:layout_height="200dp"android:id="@+id/vp"android:layout_marginTop="10dp"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/tv"android:layout_marginTop="-40dp"android:layout_marginLeft="20dp"android:textColor="#22f"/><LinearLayoutandroid:layout_width="match_parent"android:layout_height="40dp"android:gravity="center"android:id="@+id/ll"android:orientation="horizontal"android:layout_marginTop="-35dp"></LinearLayout><!--实现是展示的是上拉加载，下拉刷新--><me.maxwin.view.XListViewandroid:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/list"></me.maxwin.view.XListView></LinearLayout>

//圆点的视图布局（item.xml）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent">
<Viewandroid:layout_width="8dp"android:layout_height="8dp"android:layout_margin="10dp"android:id="@+id/view"android:background="@drawable/shape1"/>
</LinearLayout>

//在drawable的视图下面创建shape.xml、shape1.xml控制圆点的颜色

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"><solid android:color="#80000000"/><corners android:radius="8dp"/></shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<solid android:color="#f00"/><corners android:radius="8dp"/>
</shape>

import android.os.AsyncTask;
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.PagerAdapter;
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.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;import com.example.shenxuesong.jinritoutiao.Adapter.Myadpader1;
import com.example.shenxuesong.jinritoutiao.JavaBean;
import com.example.shenxuesong.jinritoutiao.R;
import com.example.shenxuesong.jinritoutiao.User;
import com.google.gson.Gson;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageSize;import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;import me.maxwin.view.XListView;public class NewFragment extends Fragment implements XListView.IXListViewListener{private List<User.ResultBean.DataBean> data;private  Myadpader1 myadpader;private ViewPager vp;private TextView tv;private LinearLayout ll;private XListView list;private static final String surl="https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=6&page=1";private List<JavaBean.NewslistBean> newslist;private List<View> dolist=new ArrayList<View>();private List<String> str=new ArrayList<String>();private List<ImageView> imagelist=new ArrayList<ImageView>();private int current=0;private int old_list=0;private  String string;private Handler h=new Handler(){@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);if(msg.what==1){int i=msg.arg1;//设置viewpager当前的播放位置vp.setCurrentItem(i);//设置当前的标题对应的图片tv.setText(str.get(i%imagelist.size()));//设置圆点当然播放对应的图片的颜色的变化dolist.get(old_list).setBackgroundResource(R.drawable.shape);dolist.get(i%imagelist.size()).setBackgroundResource(R.drawable.shape1);old_list=i%imagelist.size();}}};
@Nullable@Overridepublic View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {//找到布局文件View v = View.inflate(getActivity(), R.layout.listview, null);//ListView控件list = (XListView)v.findViewById(R.id.list);vp= (ViewPager) v.findViewById(R.id.vp);tv=(TextView)v.findViewById(R.id.tv) ;ll=(LinearLayout)v.findViewById(R.id.ll);//设置打开上拉下拉的开关list.setPullLoadEnable(true);//设置list.setXListViewListener(this);return v;}@Overridepublic void onActivityCreated(@Nullable Bundle savedInstanceState) {super.onActivityCreated(savedInstanceState);Bundle bundle = getArguments();//接收传递过来的值string = bundle.getString("name");//调用解析方法Jiexi(string);//获取图片的路径及biatigetPricUrLandTitle();}//解析方法private void Jiexi(final String string) {//使用异步new AsyncTask<String,Integer,String>(){@Overrideprotected String doInBackground(String... strings) {String str="";try {URL url = new URL("http://v.juhe.cn/toutiao/index?type=" + string + "&key=597b4f9dcb50e051fd725a9ec54d6653");HttpURLConnection conne= (HttpURLConnection) url.openConnection();conne.setConnectTimeout(5000);conne.setReadTimeout(5000);int responseCode = conne.getResponseCode();if (responseCode==200){InputStream in = conne.getInputStream();byte[] by=new byte[1024];int len=0;while ((len=in.read(by))!=-1){str+=new String(by,0,len);}}} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return str;}@Overrideprotected void onPostExecute(String s) {super.onPostExecute(s);//Gson解析Gson gson = new Gson();User user = gson.fromJson(s, User.class);data = user.getResult().getData();//listview适配器myadpader = new Myadpader1(data, getActivity());list.setAdapter(myadpader);}}.execute();}

     //获取图片的路径及biati

 private void getPricUrLandTitle() { //异步任务

new AsyncTask<String,Integer,String>(){
@Override protected String doInBackground(String... strings) {
String str="";
try {
URL url = new URL(surl);
HttpURLConnection http=(HttpURLConnection) url.openConnection();
int code = http.getResponseCode();
if(code==200){
InputStream in = http.getInputStream();
byte[] b=new byte[1024];
int len=0;
while((len=in.read(b))!=-1){
str+=new String(b,0,len);
}
}
} catch (MalformedURLException e)
{ e.printStackTrace(); }
catch (IOException e)
{ e.printStackTrace(); }
return str;
}
@Override protected void onPostExecute(String s) {
super.onPostExecute(s);
Gson gson = new Gson();
newslist = gson.fromJson(s, JavaBean.class).getNewslist();
for (int i=0;i<newslist.size();i++){
JavaBean.NewslistBean newslistBean = newslist.get(i);
String picUrl = newslistBean.getPicUrl();
String title = newslistBean.getTitle();
Log.i("TAG",picUrl);
//获取网络请求的图片数据，并把它添加到imagelist中
getImageView(picUrl);
//得到圆点
getYuanDian();
//标题
str.add(title);
}
//执行的方法
init();
}
}.execute();
}
private void getImageView(String picUrl) {
ImageView imageView = new ImageView(getActivity());
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
ImageSize size=new ImageSize(200,100);
ImageLoader.getInstance().displayImage(picUrl,imageView,size);
imagelist.add(imageView); }
private void getYuanDian() {
View view = LayoutInflater.from(getActivity()).inflate(R.layout.item, null);
View view1 = view.findViewById(R.id.view);
//将试图添加到收集圆点的集合中
dolist.add(view1);
//将圆点的视图加载在Linearlayout的占位上
ll.addView(view);
}
private void init() {
//设置适配器
vp.setAdapter(new PagerAdapter() {
@Override
public int getCount() {
return Integer.MAX_VALUE; }
@Override
public boolean isViewFromObject(View view, Object object) {
return view==object; }
@Override
public Object instantiateItem(ViewGroup container, int position) {

View imageView = imagelist.get(position % imagelist.size());
container.addView(imageView); return imageView; } 

@Override 

public void destroyItem(ViewGroup container, int position, Object object) { 

container.removeView((View) object);
}
});
//设置圆点的第一个被选中
dolist.get(0).setBackgroundResource(R.drawable.shape1);
//设置viewpager的当前位置
vp.setCurrentItem(50000000);
//启动定时器
Timer timer = new Timer();
timer.schedule(new TimerTask() { 

@Override

public void run() { 

current=vp.getCurrentItem()+1;
Message msg = Message.obtain();
msg.arg1=current;
msg.what=1;
h.sendMessage(msg); 

}
}, 3000, 2000); }
@Override 

public void onRefresh() { 

Jiexi(surl);
stopLoad();
} 

@Override

public void onLoadMore() {

//使用异步进行网络请求数据
new AsyncTask<String,Integer,String>(){ 

@Override 

protected String doInBackground(String... strings) { 

String str="";
try {
URL url = new URL("http://v.juhe.cn/toutiao/index?type=" + string + "&key=597b4f9dcb50e051fd725a9ec54d6653");

HttpURLConnection conne= (HttpURLConnection) url.openConnection(); 

conne.setConnectTimeout(5000);

conne.setReadTimeout(5000); 

int responseCode = conne.getResponseCode();

if (responseCode==200){ 

InputStream in = conne.getInputStream();
byte[] by=new byte[1024];
int len=0;
while ((len=in.read(by))!=-1){ 

str+=new String(by,0,len); 

}
}
} catch (MalformedURLException e)
{ e.printStackTrace(); }
catch (IOException e)
{ e.printStackTrace(); }
return str;
}

@Override

protected void onPostExecute(String s) { 

super.onPostExecute(s); 

//Gson解析
Gson gson = new Gson(); 

User user = gson.fromJson(s, User.class); 

List<User.ResultBean.DataBean> data1 = user.getResult().getData(); data.addAll(data1);

//listview适配器 

myadpader.notifyDataSetChanged();

        stopLoad();

}
}.execute(); 

} 

public void stopLoad(){
list.stopRefresh();
list.stopLoadMore();
list.setRefreshTime("刚刚");
}
}

//Xlistview写适配器

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.example.shenxuesong.jinritoutiao.R;
import com.example.shenxuesong.jinritoutiao.User;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageSize;import java.util.ArrayList;
import java.util.List;public class Myadpader1 extends BaseAdapter {private List<User.ResultBean.DataBean> data=new ArrayList<User.ResultBean.DataBean>();private Context context;public Myadpader1(List<User.ResultBean.DataBean> data, Context context) {this.data = data;this.context = context;}@Overridepublic int getCount() {return data.size();}@Overridepublic Object getItem(int i) {return null;}@Overridepublic long getItemId(int i) {return 0;}//判断子条目的布局@Overridepublic int getItemViewType(int position) {int re=0;if(data.get(position).getThumbnail_pic_s()!=null&&data.get(position).getThumbnail_pic_s02()!=null&&data.get(position).getThumbnail_pic_s03()!=null){re=0;}else if(data.get(position).getThumbnail_pic_s()!=null&&data.get(position).getThumbnail_pic_s02()!=null&&data.get(position).getThumbnail_pic_s03()==null){re=1;}else if(data.get(position).getThumbnail_pic_s()!=null&&data.get(position).getThumbnail_pic_s02()==null&&data.get(position).getThumbnail_pic_s03()==null){re=2;}return re;}//子条目布局的数量@Overridepublic int getViewTypeCount() {return 3;}@Overridepublic View getView(int i, View view, ViewGroup viewGroup) {//Xlistview的优化ViewHolder1 holder1=null;ViewHolder2 holder2=null;ViewHolder3 holder3=null;int re = getItemViewType(i);if(re==0){if(view==null){view=View.inflate(context,R.layout.item1,null);holder1=new ViewHolder1();holder1.tv=(TextView) view.findViewById(R.id.tv);holder1.image1=(ImageView)view.findViewById(R.id.image1);holder1.image2=(ImageView)view.findViewById(R.id.image2);holder1.image3=(ImageView)view.findViewById(R.id.image3);view.setTag(holder1);}else{holder1= (ViewHolder1) view.getTag();}holder1.tv.setText(data.get(i).getTitle()+"\n"+data.get(i).getAuthor_name()+"\n"+data.get(i).getDate());String thumbnail_pic_s = data.get(i).getThumbnail_pic_s();String thumbnail_pic_s02 = data.get(i).getThumbnail_pic_s02();String thumbnail_pic_s03 = data.get(i).getThumbnail_pic_s03();ImageSize size=new ImageSize(100,100);ImageLoader.getInstance().displayImage(thumbnail_pic_s,holder1.image1,size);ImageLoader.getInstance().displayImage(thumbnail_pic_s02,holder1.image2,size);ImageLoader.getInstance().displayImage(thumbnail_pic_s03,holder1.image3,size);}else if(re==1){if(view==null){view=View.inflate(context,R.layout.item2,null);holder2=new ViewHolder2();holder2.tv=(TextView) view.findViewById(R.id.tv);holder2.image1=(ImageView)view.findViewById(R.id.image1);holder2.image2=(ImageView)view.findViewById(R.id.image2);view.setTag(holder2);}else{holder2= (ViewHolder2) view.getTag();}holder2.tv.setText(data.get(i).getTitle()+"\n"+data.get(i).getAuthor_name()+"\n"+data.get(i).getDate());String thumbnail_pic_s = data.get(i).getThumbnail_pic_s();String thumbnail_pic_s02 = data.get(i).getThumbnail_pic_s02();ImageSize size=new ImageSize(100,100);ImageLoader.getInstance().displayImage(thumbnail_pic_s,holder2.image1,size);ImageLoader.getInstance().displayImage(thumbnail_pic_s02,holder2.image2,size);}else if(re==2){if(view==null){view=View.inflate(context, R.layout.item3,null);holder3=new ViewHolder3();holder3.tv=(TextView) view.findViewById(R.id.tv);holder3.image1=(ImageView)view.findViewById(R.id.image1);view.setTag(holder3);}else{holder3= (ViewHolder3) view.getTag();}holder3.tv.setText(data.get(i).getTitle()+"\n"+data.get(i).getAuthor_name()+"\n"+data.get(i).getDate());String thumbnail_pic_s = data.get(i).getThumbnail_pic_s();;ImageSize size=new ImageSize(100,100);//ImagerLoader加载图片ImageLoader.getInstance().displayImage(thumbnail_pic_s,holder3.image1,size);}return view;}class ViewHolder3{TextView tv;ImageView image1;}class ViewHolder2{TextView tv;ImageView image1;ImageView image2;}class ViewHolder1{TextView tv;ImageView image1;ImageView image2;ImageView image3;}
}

写子条目的布局(item1.xml,item2.xml,item3.xml)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent">
<TextViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/tv"/><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="horizontal"><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/image1"/><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/image2"/><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/image3"/></LinearLayout></LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><TextViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/tv"/><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="horizontal"><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/image1"/><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/image2"/></LinearLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><TextViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/tv"/><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/image1"/></LinearLayout>

//网络图片的加载

import android.app.Application;import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;public class MyApplication extends Application {@Overridepublic void onCreate() {super.onCreate();ImageLoaderConfiguration con=new ImageLoaderConfiguration.Builder(this).build();ImageLoader.getInstance().init(con);}
}

//最后AndroidMainfest.xml的权限的配置

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.example.shenxuesong.pulltorerfuer">
<uses-permission android:name="android.permission.INTERNET"/><applicationandroid:allowBackup="true"android:icon="@mipmap/ic_launcher" android:name=".MyApplication"android:label="@string/app_name"android:supportsRtl="true"  android:theme="@style/Theme.AppCompat.Light"><activity android:name=".MainActivity"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application></manifest>