[android-developers] Can I use some interfaces in framework?

For example:
I want to get the SIM card contacts storage information in Contacts
app, I used "IccPhoneBook" interface like this below:

try {
IIccPhoneBook iccIpb = IIccPhoneBook.Stub.asInterface(
ServiceManager.getService("simphonebook"));
if (iccIpb != null) {
int size[] =
iccIpb.getAdnRecordsSize(IccConstants.EF_ADN);
}
} catch (RemoteException ex) {
// ignore it
}

What do you think of this solution? Someone told me that's bad
solution. Is there a better solution? Thanks very much!

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