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Can we load an activity (specifically in onCreateView) in fragment ? Instead of creating view by inflater, can we launch activity so it's events gets called ?
For e.g.
Instead of using "inflater.inflate(R.layout.tabactivity, null)", can we launch activity which uses "tabactivity" as layout ?

Unfortunately this is not possible. You must create a Fragment Activity that will be used to refer to any fragment you create.
This is a good place to start:
Fragments Examples

It's not possible you cannot add Activity inside a fragment.
Fragment is part of UI component of Activity.
Refer below link
Docs for fragment in Android