安卓今日头条的框架的搭建
2017-09-15 19:04
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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.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/dl" android:layout_width="match_parent" android:layout_height="match_parent" > <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <android.support.v4.view.ViewPager android:layout_width="match_parent" android:layout_height="690dp" android:id="@+id/vp" android:layout_weight="2" /> <RadioGroup android:layout_width="match_parent" android:layout_height="40dp" android:id="@+id/rg" android:layout_weight="8" android:orientation="horizontal"> <RadioButton android: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"/> <RadioButton android: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"/> <RadioButton android: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"/> <RadioButton android: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> <ListView android: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;
@Override
protected 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() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public 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;
}
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
rg.setOnCheckedChangeListener(this);
}
@Override
public 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() {
@Override
public 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;
}
@Override
public int getCount() {
return list.size();
}
@Override
public 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.TabLayout android: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.ViewPager android: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
@Override
public 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()) {
@Override
public CharSequence getPageTitle(int position) {
return list.get(position);
}
@Override
public Fragment getItem(int position) {
//实例化一个Fragment加载Xlistview
NewFragment newfragment = new NewFragment();
Bundle bundle = new Bundle();
if(list.get(position).equals("头条")){
bundle.putString("name","top");
}
else
if(list.get(position).equals("社会")){
bundle.putString("name","shehui");
}
else
if(list.get(position).equals("国内")){
bundle.putString("name","guonei");
}
else
if(list.get(position).equals("国际")){
bundle.putString("name","guoji");
}
else
if(list.get(position).equals("娱乐")){
bundle.putString("name","yule");
}
else
if(list.get(position).equals("财经")){
bundle.putString("name","caijing");
}
else
if(list.get(position).equals("军事")){
bundle.putString("name","junshi");
}
else
if(list.get(position).equals("科技")){
bundle.putString("name","keji");
}
else
if(list.get(position).equals("体育")){
bundle.putString("name","tiyu");
}
else
if(list.get(position).equals("时尚")){
bundle.putString("name","shishang");
}
//activity与fragment 1.getset，2.接口回调，3.setArguments ,getAraguments
newfragment.setArguments(bundle);
//相当于加载了一个Fragment
return newfragment;
}
@Override
public 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.ViewPager android:layout_width="wrap_content" android:layout_height="200dp" android:id="@+id/vp" android:layout_marginTop="10dp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/tv" android:layout_marginTop="-40dp" android:layout_marginLeft="20dp" android:textColor="#22f" /> <LinearLayout android: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.XListView android: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"> <View android: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(){
@Override
public 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
@Override
public 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;
}
@Override
public 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biati
getPricUrLandTitle();
}
//解析方法
private void Jiexi(final String string) {
//使用异步
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);
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biatiprivate 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;
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
//判断子条目的布局
@Override
public 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
@Override
public int getViewTypeCount() {
return 3;
}
@Override
public 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"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/tv"/> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/image1"/> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/image2"/> <ImageView android: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"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/tv"/> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/image1"/> <ImageView android: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"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/tv"/> <ImageView android: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 {
@Override
public 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"/> <application android: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>
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