(original) The method of obtaining the application and cache size after android4.2 (the source code has changed)

The size of the previously acquired app is used

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);      }  }  

But after 4.2 packagemanager.getpackagesizeinfo (String PackageName, Ipackagestatsobserver observer) is not available,

Change to Packagemanager.getpackagesizeinfo (String packagename, int userhandle, Ipackagestatsobserver observer),

As for the added parameter Userhandle explanation is: the user whose size information should be retrieved.

How does this userhandle come? Obtained through the Userhandle.myuserid () of the system class;

Method myUserID = UserHandle.class.getDeclaredMethod ("myUserID");  int UserID = (Integer) myuserid.invoke (mpackagemanager,null);  

You can use the new Getpackagesizeinfo function once you have obtained it.

Getpackagesizeinfomethod.invoke (Mpackagemanager,packageinfo.packagename, UserID, New Myobserver ());

(original) The method of obtaining the application and cache size after android4.2 (the source code has changed)