If I had a direct reference to the OnboardingFragment somewhere in my activity, I suppose I would prefer the lambda. However, through onAttachFragment you'd need to check the type, which I feel looks kind of ugly.
Also, with the interface, I'd instead have a setter on my fragment instead of checking the type of context. That way, the listener doesn't necessarily need to be an Activity or Context, but anything that implements the interface.
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If I had a direct reference to the
OnboardingFragmentsomewhere in my activity, I suppose I would prefer the lambda. However, throughonAttachFragmentyou'd need to check the type, which I feel looks kind of ugly.Also, with the interface, I'd instead have a setter on my fragment instead of checking the type of
context. That way, the listener doesn't necessarily need to be an Activity or Context, but anything that implements the interface.