(Original) method for obtaining the application and cache size after android4.2 (the source code has changed) and android4.2 source code

(Original) method for obtaining the application and cache size after android4.2 (the source code has changed) and android4.2 source code

Used to obtain the application size

PackageManager mPackageManager = getPackageManager ();

try {Method getPackageSizeInfoMethod = PackageManager.class.getDeclaredMethod("getPackageSizeInfo", String.class,                  IPackageStatsObserver.class);  getPackageSizeInfoMethod.invoke(mPackageManager, packageInfo.packageName,new MyObserver());  } catch (Exception e) {  } 

 

class MyObserver extends IPackageStatsObserver.Stub {        @Override      public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)              throws RemoteException {          long cacheSize = pStats.cacheSize;          String packageName = pStats.packageName;          String formatFileSize = Formatter.formatFileSize(                  getApplicationContext(), cacheSize);          System.out.println(packageName + ":" + formatFileSize);      }  }  

 

However, PackageManager. getPackageSizeInfo (String packageName, IPackageStatsObserver observer) is unavailable after 4.2,

Change PackageManager. getPackageSizeInfo (String packageName, int userHandle, IPackageStatsObserver observer ),

The added parameter userHandle is interpreted as: The user whose size information shocould be retrieved.

How does this userHandle come from? Obtain it through UserHandle. myUserId () of the system class;

Method myUserId = UserHandle.class.getDeclaredMethod("myUserId");  int userID = (Integer) myUserId.invoke(mPackageManager,null);  

After obtaining the information, you can use the new getPackageSizeInfo function.

getPackageSizeInfoMethod.invoke(mPackageManager,packageInfo.packageName, userID, new MyObserver() );