导航加下划线和数据的刷新

来源：互联网发布：2018年考研人数知乎编辑：程序博客网时间：2024/05/29 16:53

一。主activity，导航加下划线要用到库

package com.example.activity;

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

import com.example.adapter.MyFragmentAdapter;
import com.example.fragment.MyFragment;
import com.example.fragment.MyFragment1;
import com.example.fragment.MyFragment2;
import com.example.fragment.MyFragment3;
import com.viewpagerindicator.TabPageIndicator;

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.view.ViewPager.OnPageChangeListener;

public class MainActivity extends FragmentActivity {
   public static String title [] = {"资讯","热点","博客","推荐"};
   private ViewPager vp;
   private List<Fragment> list = new ArrayList<Fragment>();
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);

       MyFragmentAdapter adapter = new MyFragmentAdapter(getSupportFragmentManager(),list);
       vp = (ViewPager) findViewById(R.id.pager);
       vp.setAdapter(adapter);
       TabPageIndicator   indicator = (TabPageIndicator) findViewById(R.id.indicator);
       indicator.setViewPager(vp);
       list.add(new MyFragment());
       list.add(new MyFragment1());
       list.add(new MyFragment2());
       list.add(new MyFragment3());

       indicator.setOnPageChangeListener(new OnPageChangeListener() {

           @Override
           public void onPageSelected(int arg0) {
                 vp.setCurrentItem(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

           }
       });
   }

}

二。适配器的代码

package com.example.adapter;

import java.util.List;

import com.example.activity.MainActivity;
import com.example.fragment.MyFragment;

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

public class MyFragmentAdapter extends FragmentPagerAdapter {
   private List<Fragment> list;
   private FragmentManager fm;
   public MyFragmentAdapter(FragmentManager fm,List<Fragment> list) {
       super(fm);
       this.list = list;
   }

   @Override
   public Fragment getItem(int arg0) {
       return list.get(arg0);
   }
      @Override
      public CharSequence getPageTitle(int position) {
          return MainActivity.title[position % MainActivity.title.length];
      }
   @Override
   public int getCount() {
       return MainActivity.title.length;
   }

}

package com.example.adapter;

import java.util.List;

import com.example.activity.R;
import com.example.bean.Datas.News;

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

public class MyAdapter extends BaseAdapter {
   private Context context;
   private List<News> list;


   public MyAdapter(Context context, List<News> list) {
       super();
       this.context = context;
       this.list = list;
   }

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

   @Override
   public Object getItem(int position) {
       // TODO Auto-generated method stub
       return null;
   }

   @Override
   public long getItemId(int position) {
       // TODO Auto-generated method stub
       return 0;
   }

   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
       ViewHolder vh = null;
       if(convertView==null){
           vh = new ViewHolder();
           convertView = View.inflate(context, R.layout.adapter, null);
           vh.tv_title= (TextView) convertView.findViewById(R.id.title);
           vh.tv_content= (TextView) convertView.findViewById(R.id.content);
           vh.tv_author= (TextView) convertView.findViewById(R.id.author);
           vh.tv_time= (TextView) convertView.findViewById(R.id.time);
           vh.tv_count= (TextView) convertView.findViewById(R.id.count);
           convertView.setTag(vh);
       }else{
           vh = (ViewHolder) convertView.getTag();
       }
       vh.tv_title.setText(list.get(position).title);
       vh.tv_content.setText(list.get(position).body);
       vh.tv_author.setText(list.get(position).author);
       vh.tv_time.setText(list.get(position).pubDate);
       vh.tv_count.setText("5");
       return convertView;
   }

class ViewHolder{
   TextView tv_title,tv_content,tv_author,tv_time,tv_count;
}
}

package com.example.adapter;

import java.util.List;

import com.example.activity.R;
import com.example.adapter.MyAdapter.ViewHolder;
import com.example.bean.BoKe.Blogs.Blog;

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

public class BokeAdapter extends BaseAdapter {
   private Context context;
   private List<Blog> list;


   public BokeAdapter(Context context, List<Blog> list) {
       super();
       this.context = context;
       this.list = list;
   }

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

   @Override
   public Object getItem(int position) {
       // TODO Auto-generated method stub
       return null;
   }

   @Override
   public long getItemId(int position) {
       // TODO Auto-generated method stub
       return 0;
   }

   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
       ViewHolder vh = null;
       if(convertView==null){
           vh = new ViewHolder();
           convertView = View.inflate(context, R.layout.adapter, null);
           vh.tv_title= (TextView) convertView.findViewById(R.id.title);
           vh.tv_content= (TextView) convertView.findViewById(R.id.content);
           vh.tv_author= (TextView) convertView.findViewById(R.id.author);
           vh.tv_time= (TextView) convertView.findViewById(R.id.time);
           vh.tv_count= (TextView) convertView.findViewById(R.id.count);
           convertView.setTag(vh);
       }else{
           vh = (ViewHolder) convertView.getTag();
       }
       vh.tv_title.setText(list.get(position).title);
       vh.tv_content.setText(list.get(position).body);
       vh.tv_author.setText(list.get(position).authorname);
       vh.tv_time.setText(list.get(position).pubDate);
       vh.tv_count.setText("5");
       return convertView;
   }

class ViewHolder{
   TextView tv_title,tv_content,tv_author,tv_time,tv_count;
}


}

三。bean的封装

package com.example.bean;

import java.util.List;

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

@XStreamAlias("oschina")
public class BoKe {
   public String pagesize;
   public Blogs blogs;

   public class Blogs{
       @XStreamImplicit(itemFieldName="blog")
       public List<Blog> blog;

       public class Blog{
           public String id;
           public String title;
           public String body;
           public String url;
           public String pubDate;
           public String authoruid;
           public String authorname;
           public String commentCount;
           public String documentType;
       }
   }

}

package com.example.bean;

import java.util.List;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import com.thoughtworks.xstream.annotations.XStreamAliasType;
import com.thoughtworks.xstream.annotations.XStreamAsAttribute;
import com.thoughtworks.xstream.annotations.XStreamContainedType;
import com.thoughtworks.xstream.annotations.XStreamImplicit;
import com.thoughtworks.xstream.annotations.XStreamImplicitCollection;
@XStreamAlias("oschina")
public class Datas {
   public String catalog;
   public String newsCount;
   public String pagesize;
   @XStreamAlias("newslist")
   public NewsList newslist;
   public class NewsList{
       @XStreamImplicit(itemFieldName="news")
       public List<News> news;
   }
   public class News{
       public String id;
       public String title;
       public String body;
       public String commentCount;
       public String author;
       public String authorid;
       public String pubDate;
       public String url;
       @XStreamAlias("newstype")
       public NewsType newstype;
    public class NewsType{
           public String type;
           public String authoruid2;
           public String eventurl;
           public String attachment;
       }
   }
}

四。fragment的实现（XListview的下载地址:   //https://github.com/Maxwin-z/XListView-Android ,其他四个fragment也是这样）

public class MyFragment extends Fragment implements IXListViewListener{
   private String TAG = "MyFragment";
   private static String url = "http://www.oschina.net/action/api/news_list?";
    int pagerIndex=50;
   private XListView lv;
   private MyAdapter adapter;
   private LinkedList<News> list_ = new LinkedList<Datas.News>();
   @Override
   public View onCreateView(LayoutInflater inflater,
           @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
       View view = inflater.inflate(R.layout.fragment, null);
       lv = (XListView) view.findViewById(R.id.lv);
       lv.setPullRefreshEnable(true);
       lv.setPullLoadEnable(true);
       lv.setXListViewListener(this);
       return view;
   }

   @Override
   public void onActivityCreated(@Nullable Bundle savedInstanceState) {
       super.onActivityCreated(savedInstanceState);
       //网络获取数据
        getJson(pagerIndex);


   }


/**
   * 下来刷新
   */
   @Override
   public void onRefresh() {
       pagerIndex--;
       new Handler().postDelayed(new Runnable() {
           @Override
           public void run() {
               getJson(pagerIndex);
               adapter.notifyDataSetChanged();
               onLoad();
           }
       }, 3000);


   }
/**
* 上拉加载
*/
   @Override
   public void onLoadMore() {
        pagerIndex++;
       new Handler().postDelayed(new Runnable() {
           @Override
           public void run() {
               getJson(pagerIndex);
               adapter.notifyDataSetChanged();
               onLoad();
           }
       }, 3000);

   }
   private void getJson(int pagerIndex) {
       HttpUtils httpUtils = new HttpUtils();
       /*RequestParams params = new RequestParams();
       params.addBodyParameter("catalog", "1");
       params.addBodyParameter("pageIndex", pageIndex[]);
       params.addBodyParameter("pageSize", "6");*/
       httpUtils.send(HttpMethod.GET, url+"catalog=1"+"&pageIndex="+pagerIndex+"&pageSize=6", new RequestCallBack<String>() {

           @Override
           public void onFailure(HttpException arg0, String arg1) {

           }
           @Override
           public void onSuccess(ResponseInfo<String> arg0) {
                  String result = arg0.result;
               //   Log.i(TAG, "----======----"+result);
                  final List<News> list;
               XStream xStream = new XStream();
               xStream.processAnnotations(Datas.class);
                  Datas datas = (Datas) xStream.fromXML(result);
                  list = (List<News>) datas.newslist.news;
              //    Log.i(TAG, "------"+list.size());
                  getActivity().runOnUiThread(new Runnable() {

                   @Override
                   public void run() {
                         adapter = new MyAdapter(getActivity(), list);
                         lv.setAdapter(adapter);
                   }
               });
           }

       });
}
   @SuppressLint("SimpleDateFormat")
   private void onLoad() {
       // TODO Auto-generated method stub
       lv.stopRefresh();
       lv.stopLoadMore();
       SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
       String nowTime=df.format(new Date(System.currentTimeMillis()));// 获取当前系统时间
       lv.setRefreshTime(nowTime);//释放时提示正在刷新时的当前时间
   }
}

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