PackageManager()的使用列举相关的事件

来源：http://blog.csdn.net/wal812834184/archive/2010/10/20/5953906.aspx
PackageManager()的使用列举相关的事件
文章分类:移动开发

引用

Class for retrieving various kinds of information related to the application packages that are currently installed on the device. You can find this class through getPackageManager().

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.     }  

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. }   

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.  }  

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 }  

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.