android TabActivity及全局变量

1.继承TabActivity代码如下：

public class TabProject extends TabActivity {
    TabHost th;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tabl_main);
        th=getTabHost();
        HttpData hd = new HttpData();//访问web的类
        List<Map<String, Object>> lists = hd.getPost("w034");//取得数据
        ListMap listmap = (ListMap)getApplication();//得到全局变量实例
        listmap.setLists(lists);//把数据添加到实例中
        //调用以下方法，为tabactivity添加tab
        addTaskTab();
        addNoticeTab();
        addRizhiTab();
        TabWidget tabWidget = th.getTabWidget();
　　　　　　//设定tab标签的高度
          for (int i = 0; i < tabWidget.getChildCount(); i++)
          {
          tabWidget.getChildAt(i).getLayoutParams().height = 50;
          }

}
    
    public void addTaskTab(){
　　　　//通过新建Activity实现tab
        Intent intent = new Intent();
        intent.setClass(TabProject.this,TaskActivity.class);
        
        TabSpec ts = th.newTabSpec("task");
　　　　　//添加tab的lable
        ts.setIndicator(getString(R.string.task_project), null);
        ts.setContent(intent);
        th.addTab(ts);
    }
    
    
    public void addNoticeTab(){ 
               Intent intent = new Intent();   
               intent.setClass(TabProject.this, NoticeActivity.class);   
                  
               TabSpec spec = th.newTabSpec("notice");   
               spec.setIndicator(getString(R.string.notice_task), null);   
               spec.setContent(intent);           
               th.addTab(spec);   
           }   
    public void addRizhiTab(){
       Intent intent = new Intent();   
       intent.setClass(TabProject.this, RizhiActivity.class);   
          
       TabSpec spec = th.newTabSpec("notice");   
       spec.setIndicator(getString(R.string.rizhi_project), null);   
       spec.setContent(intent);           
       th.addTab(spec);   
   
    }

}

 TabProject对应的layout  xml其中的控件id都是固定的

<?xml version="1.0" encoding="utf-8"?>   
<TabHost   
    xmlns:android="http://schemas.android.com/apk/res/android"   
    android:id="@android:id/tabhost"   
    android:layout_width="fill_parent"   
    android:layout_height="fill_parent">   
    <LinearLayout   
        android:orientation="vertical"   
        android:layout_width="fill_parent"   
        android:layout_height="fill_parent">   
      
        <TabWidget android:id="@android:id/tabs"   
            android:layout_width="fill_parent"   
            android:layout_height="wrap_content"   
            android:paddingLeft="1dip"   
            android:paddingRight="1dip"   
            android:paddingTop="4dip"   
        />   
           
        <FrameLayout android:id="@android:id/tabcontent"   
            android:layout_width="fill_parent"   
            android:layout_height="0dip"   
            android:layout_weight="1"   
        />        
   </LinearLayout>   
</TabHost>

其中的一个tab的activity这个activity继承了ListActivit

public class NoticeActivity extends ListActivity {
    private List<Map<String, Object>> noticelist= new ArrayList<Map<String,Object>>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        ListMap listmap = (ListMap)getApplication();
        for(int i=0;i<listmap.getLists().size();i++){
            Map<String,Object> map = listmap.getLists().get(i);
            if(map.get("sortname").equals("通知")){
                noticelist.add(map);
            }
        }
        SimpleAdapter sa = new SimpleAdapter(this,noticelist, R.layout.task_list,new String[]{"taskid","title","status","date"},new int[]{R.id.taskid,R.id.title,R.id.status,R.id.date});
        setListAdapter(sa);
        getListView().setOnLongClickListener(new OnLongClickListener() {
            
            public boolean onLongClick(View v) {
                // TODO Auto-generated method stub
                return false;
            }
        });
    }
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        // TODO Auto-generated method stub
        super.onListItemClick(l, v, position, id);
        Log.i("",v.toString()+"----"+noticelist.get(position).get("title")+"++"+id);
        String url = "http://10.0.2.2:8080/om4/json/messageAction_getMessageInfo.do";
        
        NameValuePair nv = new BasicNameValuePair("mesddid",noticelist.get(position).get("taskid").toString());
        //NameValuePair nv2 = new BasicNameValuePair("",noticelist.get(position).get("").toString());
        List<NameValuePair> lists = new ArrayList<NameValuePair>();
        //lists.add(nv2);
        lists.add(nv);
        try {
            HttpEntity httpentity = new UrlEncodedFormEntity(lists,HTTP.UTF_8);
            HttpPost post = new HttpPost(url);
            post.setEntity(httpentity);
            Log.e("jessionid",noticelist.get(position).get("JSESSIONID").toString());
            //JSESSIONID用来传送sessionid用的这里我把sessionid放在了全局变量里面，在这儿取到sessionid传入后台验证
            post.setHeader("Cookie","JSESSIONID="+noticelist.get(position).get("JSESSIONID").toString());
            HttpClient httpclient =new DefaultHttpClient();
            HttpResponse response = httpclient.execute(post);
            
            if(response.getStatusLine().getStatusCode()==200){
                Log.i("数据返回","请求成功");
                
                StringBuffer sb = new StringBuffer();
                BufferedReader bufferedReader2 = new BufferedReader( 
                        new InputStreamReader(response.getEntity().getContent())); 
                String str2 = ""; 
                for (String s = bufferedReader2.readLine(); s != null; s = bufferedReader2 
                        .readLine()) { 
                    sb.append(s); 
                } 
                Log.e("数据",sb.toString());
                String success = new JSONObject(sb.toString()).getString("success");
                Log.e("success",success);
                if(success=="true"){
                    Intent intent = new Intent();
                    JSONArray jsonarray = new JSONObject(sb.toString()).getJSONArray("data");
                    intent.putExtra("data",jsonarray.opt(0).toString());
                    intent.setClass(NoticeActivity.this,NoticeOrdinary.class);
                    startActivity(intent);
                }
            }
            
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
    
    
    private List<Map<String,Object>> getdata(){
        List<Map<String, Object>> lists = new ArrayList<Map<String,Object>>();
        
        return lists;
    }
    
    

}

Listactivity用的xml文件代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <LinearLayout 
        android:layout_width="fill_parent"
           android:layout_height="fill_parent"
        android:orientation="horizontal"
        >
    <TextView 
        android:id="@+id/taskid"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFFFF"
        android:visibility="gone"
        />
    <TextView 
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFFFF"
        />
    </LinearLayout>
    <LinearLayout 
        android:layout_width="fill_parent"
           android:layout_height="fill_parent"
        android:orientation="horizontal"
        >
    <TextView 
        android:id="@+id/status"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFFFF"
        android:layout_marginRight="20dip"
        />
    <TextView 
        android:id="@+id/date"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFFFF"
        />
     </LinearLayout>
</LinearLayout>

全局变量的实体对象

package org.activity.entity;

import java.util.List;
import java.util.Map;

import android.app.Application;

public class ListMap extends Application{
    
    private String jessionid;
    public String getJessionid() {
        return jessionid;
    }

    public void setJessionid(String jessionid) {
        this.jessionid = jessionid;
    }

    private List<Map<String, Object>> lists;

    public List<Map<String, Object>> getLists() {
        return lists;
    }

    public void setLists(List<Map<String, Object>> lists) {
        this.lists = lists;
    }

}

全局变量需要在AndroidManifest.xml的配置

<application
        android:name="org.activity.entity.ListMap"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >