获取已安装程序的名字、包名

package  com.MyTask;

import  java.util.ArrayList;
import  java.util.HashMap;
import  java.util.List;
import  java.util.Map;

import  android.app.Activity;
import  android.content.pm.PackageInfo;
import  android.graphics.drawable.Drawable;
import  android.os.Bundle;
import  android.util.Log;
import  android.widget.ListView;
import  android.widget.SimpleAdapter;

public   class  MyTask  extends  Activity {
     /**  Called when the activity is first created.  */
     private  List < Map < String, Object >>  data;
    Map < String, Object >  item;
    @Override
     public   void  onCreate(Bundle savedInstanceState) {
         super .onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ListView list  =  (ListView) findViewById(R.id.listbody); 
        data  =   new  ArrayList < Map < String, Object >> ();
        listPackages();
        SimpleAdapter adapter  =   new  SimpleAdapter( this , data,
                R.layout.list_main,  new  String[] { " appname " , " pname "  },  new   int [] {
                 R.id.list_name, R.id.list_size, });
              list.setAdapter(adapter);

    }
     class  PInfo {     
         private  String appname  =   "" ;     
         private  String pname  =   "" ;     
         private  String versionName  =   "" ;     
         private   int  versionCode  =   0 ;     
         private  Drawable icon;     
         private   void  prettyPrint() {     
            Log.i( " taskmanger " ,appname  +   " \t "   +  pname  +   " \t "   +  versionName  +   " \t "   +  versionCode  +   " \t " );     
        }     
    } 
     private   void  listPackages() {     
        ArrayList < PInfo >  apps  =  getInstalledApps( false );  /*  false = no system packages  */      
         final   int  max  =  apps.size();     
         for  ( int  i = 0 ; i < max; i ++ ) {     
            apps.get(i).prettyPrint();   
            item  =   new  HashMap < String, Object > ();
            item.put( " appname " , apps.get(i).appname);
            item.put( " pname " , apps.get(i).pname);
            data.add(item);     
        }     
    }   
     private  ArrayList < PInfo >  getInstalledApps( boolean  getSysPackages) {     
        ArrayList < PInfo >  res  =   new  ArrayList < PInfo > ();             
        List < PackageInfo >  packs  =  getPackageManager().getInstalledPackages( 0 );     
         for ( int  i = 0 ;i < packs.size();i ++ ) {     
            PackageInfo p  =  packs.get(i);     
             if  (( ! getSysPackages)  &&  (p.versionName  ==   null )) {     
                 continue  ;     
            }     
            PInfo newInfo  =   new  PInfo();     
            newInfo.appname  =  p.applicationInfo.loadLabel(getPackageManager()).toString();     
            newInfo.pname  =  p.packageName;     
            newInfo.versionName  =  p.versionName;     
            newInfo.versionCode  =  p.versionCode;     
            newInfo.icon  =  p.applicationInfo.loadIcon(getPackageManager());  
            res.add(newInfo);     
        }     
         return  res;      
    }    



}