How can I differentiate an android Activity from a SubActivity programatically?

Question

How can I differentiate an android Activity from a SubActivity programmatically? Is there any API for that?

Answer 1

I am assuming you are referring to detecting whether an activity was started via startActivityForResult() or not.

In that case, try getCallingActivity(). To quote the documentation, "Note: if the calling activity is not expecting a result (that is it did not use the startActivityForResult(Intent, int) form that includes a request code), then the calling package will be null."