Android AIDL security

you could always filter in your methods to restrict the packages that are allowed. Throw a SecurityException if the package does not have permission

Collection<String> callingpackages = getCallingPackages();

if(!callingpackages.contains("yourpackagename"){
//Throw securityException.
}

And getCallingPackages

private Collection<String> getCallingPackages() {
     int caller = Binder.getCallingUid();
     if (caller == 0) {
         return null;
     }
     return Lists.newArrayList(mContext.getPackageManager().getPackagesForUid(caller));
 }