If we call the getActivity method inside a user-defined Fragment class and assign the return value to a user-defined Activity class, the Fragment class is not usable with a different user-defined Activity class. To make it reusable with a different user-defined Activity class, we use an interface inside the user-defined Fragment class and have our user-defined Activity class implement that interface.

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Quizplus · Accepted Answer

This is true because by using an interface, the Fragment can communicate with any Activity that implements that interface, making it more reusable and flexible.

If We Call the GetActivity Method Inside a User-Defined Fragment