I am developing an Android Security Enhancer.
I created a native service named myphone, and replaced android
phone service with myphone, and it can successfully intercepte the
getCellLocation.
BUT, when I tried to create a native service name myactivity, and
tried to replace android activity service, that wants to itercepte
others API such as sms data query, I failed.
I find some difference in activity service and other services,
such as:
In ActivityManagerNative.java
public boolean onTransact(int code, Parcel data, Parcel reply,
int flags) throws RemoteException
{
......
case ATTACH_APPLICATION_TRANSACTION:
{
data.enforceInterface(IActivityManager.descriptor);
IApplicationThread app =
ApplicationThreadNative.asInterface(data.readStrongBinder()); //
difference in activity service: cast as IApplicationThread
if (app != null)
{
attachApplication(app);
}
reply.writeNoException();
return true;
}
......
}
I think there are some differences between activity service and
others service so, I can not do the 'Man In The Middle' to intercepte
API.
Could anybody please give some hints on this failure?
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