游标和XML解析

刷新网址 http://blog.csdn.net/lmj623565791/article/details/38238749

方法一：

　　用RadioGroup写XML文件时

Activity是

package com.example.youbiao;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;

public class MainActivity extends FragmentActivity implements OnClickListener {
   private int width;
   private ViewPager vp;
   private RadioGroup group;
   private String[] column = new String[] { "资讯", "热点", "博客", "推荐" };
   private RadioButton btn_1;
   private RadioButton btn_2;
   private RadioButton btn_3;
   private RadioButton btn_4;
   private LinearLayout line;

   private List<String> str = Arrays
           .asList("http://www.oschina.net/action/api/news_list?catalog=1&pageSize=10&pageIndex=",
                   "http://www.oschina.net/action/api/news_list?catalog=4&pageSize=10&show=week&pageIndex=",
                   "http://www.oschina.net/action/api/blog_list?type=latest&pageSize=10&pageIndex=",
                   "http://www.oschina.net/action/api/blog_list?type=recommend&pageSize=10&pageIndex=");
   private ArrayList<Fragment> list_fragment;

   private ArrayList<TextView> list_tv;

   private ArrayList<RadioButton> list_btn;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       DisplayMetrics outMetrics = new DisplayMetrics();
       getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
       width = outMetrics.widthPixels;

       init();

       // 初始化导航
       setColumn();
       // 为vp设置fragment页面
       setFragment();
       // 为vp设置适配器
       FragmentManager fm = getSupportFragmentManager();
       vp.setAdapter(new MyPagerAdapter(fm, list_fragment));
       // 设置文字颜色
       setTextClo(vp.getCurrentItem());
       // 设置游标显示
       setYouBiao(vp.getCurrentItem());
       vp.setOnPageChangeListener(new OnPageChangeListener() {

           @Override
           public void onPageSelected(int arg0) {
               // TODO Auto-generated method stub
               // 设置文字颜色
               setTextClo(arg0);
               // 设置游标显示
               setYouBiao(arg0);
           }

           @Override
           public void onPageScrolled(int arg0, float arg1, int arg2) {
               // TODO Auto-generated method stub

           }

           @Override
           public void onPageScrollStateChanged(int arg0) {
               // TODO Auto-generated method stub

           }
       });
   }

   private void setYouBiao(int arg0) {
       // TODO Auto-generated method stub
       // 获取当前页面的游标
       TextView textView = list_tv.get(arg0);

       // 将当前的游标显示
       textView.setVisibility(View.VISIBLE);

       // 将其他的游标隐藏
       for (int i = 0; i < list_tv.size(); i++) {
           TextView textView2 = list_tv.get(i);

           if (textView2 != textView) {
               textView2.setVisibility(View.INVISIBLE);
           }
       }
   }

   private void setTextClo(int p) {
       // TODO Auto-generated method stub
       RadioButton radioButton = list_btn.get(p);
       radioButton.setGravity(Gravity.CENTER);
       radioButton.setTextColor(Color.GREEN);
       for (int i = 0; i < list_btn.size(); i++) {
           RadioButton radioButton2 = list_btn.get(i);
           if (radioButton2 != radioButton) {
               radioButton2.setTextColor(Color.BLACK);
           }
       }
   }

   private void setFragment() {
       // TODO Auto-generated method stub
       list_fragment = new ArrayList<Fragment>();
       for (int i = 0; i < column.length; i++) {
           // 创建fragment对象
           MyFragment myFragment = new MyFragment(str.get(i), i);
           list_fragment.add(myFragment);
       }
   }

   private void setColumn() {
       // TODO Auto-generated method stub
       // 创建集合对象
       list_tv = new ArrayList<TextView>();
       for (int i = 0; i < 4; i++) {
           TextView tv = new TextView(this);
           tv.setBackgroundColor(Color.GREEN);
           tv.setGravity(Gravity.CENTER);
           LinearLayout.LayoutParams params_1 = new LayoutParams(width / 4, 4);
           tv.setVisibility(View.INVISIBLE);
           line.addView(tv, params_1);
           // 收集textview，即游标
           list_tv.add(tv);

       }
   }

   private void init() {
       // TODO Auto-generated method stub
       group = (RadioGroup) findViewById(R.id.group);
       btn_1 = (RadioButton) findViewById(R.id.btn_1);
       btn_2 = (RadioButton) findViewById(R.id.btn_2);
       btn_3 = (RadioButton) findViewById(R.id.btn_3);
       btn_4 = (RadioButton) findViewById(R.id.btn_4);

       btn_1.setOnClickListener(this);
       btn_2.setOnClickListener(this);
       btn_3.setOnClickListener(this);
       btn_4.setOnClickListener(this);
       vp = (ViewPager) findViewById(R.id.vp);
       line = (LinearLayout) findViewById(R.id.line);

       list_btn = new ArrayList<RadioButton>();
       list_btn.add(btn_1);
       list_btn.add(btn_2);
       list_btn.add(btn_3);
       list_btn.add(btn_4);
   }

   @Override
   public void onClick(View v) {
       // TODO Auto-generated method stub
       switch (v.getId()) {
       case R.id.btn_1:
           vp.setCurrentItem(0);
           break;

       case R.id.btn_2:
           vp.setCurrentItem(1);
           break;

       case R.id.btn_3:
           vp.setCurrentItem(2);
           break;

       case R.id.btn_4:
           vp.setCurrentItem(3);
           break;

       default:
           break;
       }
   }

}
Vo包是网址是 http://www.oschina.net/action/api/news_list?catalog=1&pageSize=10&pageIndex=

package com.example.youbiao;

import java.io.Serializable;
import java.util.List;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import com.thoughtworks.xstream.annotations.XStreamImplicit;

@XStreamAlias("oschina")
public class Bean implements Serializable {
   public String catalog;
   public String newsCount;
   public String pagesize;
   public Newslist newslist;

   @XStreamAlias("newslist")
   public class Newslist implements Serializable{
       @XStreamImplicit(itemFieldName="news")
       public List<News> news;
   }
   public class News implements Serializable{
       public String id;
       public String title;
       public String body;
       public String commentCount;
       public String author;
       public String authorid;
       public String pubDate;
       public String url;
       public Type newstype;
   }
   @XStreamAlias("newstype")
   public class Type implements Serializable{
       public String type;
       public String authoruid2;
       public String eventurl;
       public String attachment;
   }

}

Fragment是

package com.example.youbiao;

import java.util.List;

import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.text.format.DateUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.example.youbiao.Bean.News;
import com.example.youbiao.Blog.BlogEntity;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;
import com.lidroid.xutils.http.client.HttpRequest.HttpMethod;
import com.thoughtworks.xstream.XStream;

public class MyFragment extends Fragment {

   private String url;
   private int position;
   private BeanBaseAdapter adapter;
   private BlogBaseAdapter blogadapter;
   private int num;
   private Handler mhandler;
   private List<News> list;
   private List<BlogEntity> lists;
   private PullToRefreshListView mPullRefreshListView;

   public MyFragment(String url, int position) {
       super();
       this.url = url;
       this.position = position;
   }

   @SuppressWarnings("unchecked")
   @Override
   public View onCreateView(LayoutInflater inflater, ViewGroup container,
           Bundle savedInstanceState) {
       View view = inflater.inflate(R.layout.fragment, null);
       mhandler = new Handler();

       Log.i("aaa", position+"");
       getdata(url);
       mPullRefreshListView = (PullToRefreshListView)view. findViewById(R.id.pull_refresh_list);
       mPullRefreshListView.setOnRefreshListener(new OnRefreshListener2() {

           @Override
           public void onPullDownToRefresh(PullToRefreshBase refreshView) {
               // TODO Auto-generated method stub
               mhandler.postDelayed(new Runnable() {
                   @Override
                   public void run() {
                       String u=url+num;
                       num++;
                       getdata(u);
                       onLoad();
                       mPullRefreshListView.onRefreshComplete();
                   }
               }, 2000);
           }

           @Override
           public void onPullUpToRefresh(PullToRefreshBase refreshView) {
               // TODO Auto-generated method stub
               mhandler.postDelayed(new Runnable() {
                   @Override
                   public void run() {
                       String u=url+num;
                       num+=2;
                       getdataflush(u);
                       onLoad();
                       mPullRefreshListView.onRefreshComplete();
                   }

               }, 2000);
           }
       });
       return view;
   }

   private void getdataflush(String u) {
       // TODO Auto-generated method stub
       HttpUtils httpUtils=new HttpUtils();
       httpUtils.send(HttpMethod.GET, u, new RequestCallBack<String>() {

           @Override
           public void onFailure(HttpException arg0, String arg1) {
               // TODO Auto-generated method stub

           }

           @Override
           public void onSuccess(ResponseInfo<String> arg0) {
               // TODO Auto-generated method stub
               XStream stream=new XStream();
               if (position==0||position==1) {
                   stream.processAnnotations(Bean.class);
                   Bean bean = (Bean) stream.fromXML(arg0.result);
                   List<News> list1 = bean.newslist.news;
                   list.addAll(list1);
                   adapter.notifyDataSetChanged();
               }else if(position==2||position==3){
                   stream.processAnnotations(Blog.class);
                   Blog blog = (Blog) stream.fromXML(arg0.result);
                   List<BlogEntity> lists1 = blog.blogs.blog;
                   lists.addAll(lists1);
                   blogadapter.notifyDataSetChanged();
               }
           }
       });
   }


   private void getdata(String url2) {
       // TODO Auto-generated method stub
       HttpUtils httpUtils=new HttpUtils();
       httpUtils.send(HttpMethod.GET, url2, new RequestCallBack<String>() {

           @Override
           public void onFailure(HttpException arg0, String arg1) {
               // TODO Auto-generated method stub

           }

           @Override
           public void onSuccess(ResponseInfo<String> arg0) {
               // TODO Auto-generated method stub
               XStream stream=new XStream();
               if (position==0||position==1) {
                   stream.processAnnotations(Bean.class);
                   Bean bean = (Bean) stream.fromXML(arg0.result);
                   list = bean.newslist.news;
                   adapter = new BeanBaseAdapter(getActivity(),list);
                   mPullRefreshListView.setAdapter(adapter);
               }else if(position==2||position==3){
                   stream.processAnnotations(Blog.class);
                   Blog blog = (Blog) stream.fromXML(arg0.result);
                   lists = blog.blogs.blog;
                   Log.i("aaa", lists.toString());
                   blogadapter = new BlogBaseAdapter(getActivity(),lists);
                   mPullRefreshListView.setAdapter(blogadapter);
               }
           }
       });
   }
   private void onLoad(){
       String label = DateUtils.formatDateTime(
                 getActivity(),
                 System.currentTimeMillis(),
                 DateUtils.FORMAT_SHOW_TIME
                         | DateUtils.FORMAT_SHOW_DATE
                         | DateUtils.FORMAT_ABBREV_ALL);
         // 显示最后更新的时间
         mPullRefreshListView.getLoadingLayoutProxy()
                 .setLastUpdatedLabel(label);
   }

}

Fragment适配器是

package com.example.youbiao;

import java.util.List;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

public class MyPagerAdapter extends FragmentPagerAdapter{

   private List<Fragment> list;

   public MyPagerAdapter(FragmentManager fm,List<Fragment> list) {
       super(fm);
       // TODO Auto-generated constructor stub
       this.list=list;
   }

   @Override
   public Fragment getItem(int arg0) {
       // TODO Auto-generated method stub
       return list.get(arg0);
   }

   @Override
   public int getCount() {
       // TODO Auto-generated method stub
       return list.size();
   }

}

适配器是

package com.example.youbiao;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.example.youbiao.Bean.News;

public class BeanBaseAdapter extends BaseAdapter {
   Context context;
   List<News> list;
   public BeanBaseAdapter(Context context, List<News> list) {
       // TODO Auto-generated constructor stub
       this.context=context;
       this.list=list;
   }

   @Override
   public int getCount() {
       // TODO Auto-generated method stub
       return list.size();
   }

   @Override
   public Object getItem(int arg0) {
       // TODO Auto-generated method stub
       return list.get(arg0);
   }

   @Override
   public long getItemId(int position) {
       // TODO Auto-generated method stub
       return position;
   }

   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
       // TODO Auto-generated method stub
       ViewHolder vh;
       if(convertView==null){
           convertView=LayoutInflater.from(context).inflate(android.R.layout.simple_list_item_2, null);
           vh=new ViewHolder();
           vh.tv1=(TextView) convertView.findViewById(android.R.id.text1);
           vh.tv2=(TextView) convertView.findViewById(android.R.id.text2);
           convertView.setTag(vh);
       }else{
           vh=(ViewHolder) convertView.getTag();
       }
       vh.tv1.setText(list.get(position).title);
       vh.tv2.setText(list.get(position).body);
       return convertView;
   }
   class ViewHolder{
       TextView tv1,tv2;
   }
}

方法二建议网址 http://www.jianshu.com/p/a2263ee3e7c3

package com.example.mouth;

import java.util.Arrays;
import java.util.List;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.widget.Toast;

import com.viewpagerindicator.TabPageIndicator;

public class MainActivity extends FragmentActivity {
   private ViewPager mPager;
   private List<String> url_list = Arrays
           .asList("http://www.oschina.net/action/api/news_list?catalog=1&pageSize=10&pageIndex=",
                   "http://www.oschina.net/action/api/news_list?catalog=4&pageSize=10&show=week&pageIndex=",
                   "http://www.oschina.net/action/api/blog_list?type=latest&pageSize=10&pageIndex=",
                   "http://www.oschina.net/action/api/blog_list?type=recommend&pageSize=10&pageIndex=");
   private static final String[] TITLE = new String[] {"咨询", "热点", "博客","推荐"};
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       findId();
   }
   private void findId() {
       mPager = (ViewPager) findViewById(R.id.pager);
       // ViewPager的adapter
       FragmentPagerAdapter adapter = new MyPagerAdapter(getSupportFragmentManager());
       mPager.setAdapter(adapter);
       // 实例化TabPageIndicator然后设置ViewPager与之关联
       TabPageIndicator indicator = (TabPageIndicator) findViewById(R.id.indicator);
       indicator.setViewPager(mPager);

       // 如果我们要对ViewPager设置监听，用indicator设置就行了
       indicator.setOnPageChangeListener(new OnPageChangeListener() {

           @Override
           public void onPageSelected(int arg0) {

           }

           @Override
           public void onPageScrolled(int arg0, float arg1, int arg2) {

           }

           @Override
           public void onPageScrollStateChanged(int arg0) {

           }
       });

   }

   class MyPagerAdapter extends FragmentPagerAdapter {

       public MyPagerAdapter(FragmentManager fm) {
           super(fm);
           // TODO Auto-generated constructor stub
       }

       @Override
       public Fragment getItem(int position) {
           // 新建一个Fragment来展示ViewPager item的内容，并传递参数
           BaseFragment fragment = new BaseFragment(url_list.get(position),
                   position);
           return fragment;
       }

       @Override
       public CharSequence getPageTitle(int position) {
           return TITLE[position % TITLE.length];
       }

       @Override
       public int getCount() {
           return TITLE.length;
       }
   }
}