Android Development Cleanup System cache error

Recently, when cleaning up the system cache function, use the following methods

Packagemanager pm = Context.getpackagemanager (); Method Localmethod = Pm.getclass (). GetMethod ("Freestorageandnotify", Long.type, Ipackagedataobserver.class); Long Locallong = long.valueof (Getenvironmentsize ()-1L); object[] Arrayofobject = new Object[2];arrayofobject[0] = LocalL Ong;localmethod.invoke (PM, Locallong, new Ipackagedataobserver.stub () {public void onremovecompleted (String PackageName, Boolean succeeded) throws RemoteException {}});

The debug state works correctly, but the formal package compilation encounters an error, and the log prompt nosuchmethodexception (

Freestorageandnotify

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