PackageManager()的使用列举相关的事件

看来这个东西应该专门开一个帖子了，发现这个包里面的东西太多，以前写的很零碎不容易找

查询系统使用的Content Providers

Java代码

1. for  (PackageInfo pack : getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS)) {   
2.         ProviderInfo[] providers = pack.providers;   
3.         if  (providers !=  null ) {   
4.             for  (ProviderInfo provider : providers) {   
5.                 Log.d("Example" ,  "provider: "  + provider.authority);   
6.             }   
7.         }   
8.     }   

for (PackageInfo pack : getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS)) { 
        ProviderInfo[] providers = pack.providers; 
        if (providers != null) { 
            for (ProviderInfo provider : providers) { 
                Log.d("Example", "provider: " + provider.authority); 
            } 
        } 
    } 

 

Java代码

1. class  PInfo {     
2.     private  String appname =  "" ;     
3.     private  String pname =  "" ;     
4.     private  String versionName =  "" ;     
5.     private   int  versionCode =  0 ;     
6.     private  Drawable icon;     
7.     private   void  prettyPrint() {     
8.         log(appname + "/t"  + pname +  "/t"  + versionName +  "/t"  + versionCode +  "/t" );     
9.     }     
10. }     
11.     
12. private   void  listPackages() {     
13.     ArrayList<PInfo> apps = getInstalledApps(false );  /* false = no system packages */     
14.     final   int  max = apps.size();     
15.     for  ( int  i= 0 ; i<max; i++) {     
16.         apps.get(i).prettyPrint();     
17.     }     
18. }     
19.     
20. private  ArrayList<PInfo> getInstalledApps( boolean  getSysPackages) {     
21.     ArrayList<PInfo> res = new  ArrayList<PInfo>();             
22.     List<PackageInfo> packs = getPackageManager().getInstalledPackages(0 );     
23.     for ( int  i= 0 ;i<packs.size();i++) {     
24.         PackageInfo p = packs.get(i);     
25.         if  ((!getSysPackages) && (p.versionName ==  null )) {     
26.             continue  ;     
27.         }     
28.         PInfo newInfo = new  PInfo();     
29.         newInfo.appname = p.applicationInfo.loadLabel(getPackageManager()).toString();     
30.         newInfo.pname = p.packageName;     
31.         newInfo.versionName = p.versionName;     
32.         newInfo.versionCode = p.versionCode;     
33.         newInfo.icon = p.applicationInfo.loadIcon(getPackageManager());     
34.         res.add(newInfo);     
35.     }     
36.     return  res;      
37. }    

class PInfo {   
    private String appname = "";   
    private String pname = "";   
    private String versionName = "";   
    private int versionCode = 0;   
    private Drawable icon;   
    private void prettyPrint() {   
        log(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();   
    }   
}   
  
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;    
}  

 

用这个方法来获取系统内所包含的Applications信息：

Java代码

1. private   void  listPackages() {    
2.   
3.    ArrayList < PInfo > apps = getInstalledApps(false );  /* false = no system packages */    
4.   
5.    final   int  max = apps.size();    
6.   
7.   for  ( int  i= 0 ; i < max; i++) {    
8.   
9.        apps.get(i).prettyPrint();    
10.   
11.    }    
12.  }   

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();  

   }  
 } 

 

Java代码

1. 01  PackageManager manager =  this .getPackageManager();    
2.   
3. 02   try  {      
4.   
5. 03       
6.   
7. 04     PackageInfo info = manager.getPackageInfo( this .getPackageName(),  0 );    
8.   
9. 05     String packageName = info.packageName;    
10.   
11. 06      int  versionCode = info.versionCode;    
12.   
13. 07     String versionName = info.versionName;      
14.   
15. 08       
16.   
17. 09  }  catch  (NameNotFoundException e) {    
18.   
19. 10      // TODO Auto-generated catch block     
20.   
21. 11  }