How to get the phone's cache

1, the mobile phone in the cache is generally placed in the mobile phone data/data/project/cache, the cache file is not readable and not writable, so can not be directly obtained 2, in the source to find Mpm.getpackagesizeinfo (package name, Mstatsobserver  ); 3, Getpackagesizeinfo method has been hidden, can only use reflection to obtain: Need to import these two aidl files

Ipackagestatsobserver.aidl and Packagestats.aidl

1??                        Gets the Packagemanager Manager object, public static void Getcachesize (final Activity context, String packname,final     Ongetcachesizelistener listener) {Packagemanager pm = Context.getpackagemanager (); 2?? Use reflection//1. Class Class<?     Extends packagemanager> clazz = Pm.getclass (); 2. Method method = Clazz.getdeclaredmethod ("Getpackagesizeinfo", new class[] {String.class,ipackagestatsobserv       Er.class}); 3.objpm            has acquired the Task Manager  //in order to get to the callback, define an interface       Ipackagestatsobserver.stub mstub = new Ipackagestatsobserver.stub () {       @Override      public void ongetstatscompleted (Packagestats pstats, Boolean succeeded)       throws RemoteException {     //callback result      final long CacheSize = pstats.cachesize;                 //because the UI interface has been modified, it cannot be run in a child thread , create a UI thread that modifies      context.runonuithread (new Runnable () {     in the main thread   @Override      public void Run () {     //TODO Auto-generated method Stub     listener.getcachesize (cacheSize);//callback The result to the user            }});      //4. Invoke method.invoke (PM, New Object[]{pacKname,mstub}); }     3?? Define an interface        public class Getappcachemessageutils {
public interface ongetcachesizelistener{
void Getcachesize (Long cacheSize);}

How to get the phone's cache