get parent activity by a fragment-CodePudding

I'm currently having two activities, MainActivity and ResultActivity and both of them will use the same fragment - Favorite. my question is: How to know which activity is containing the fragment? For example I have a fragment A inside activity ResultActivity, and how can I know if fragment A is contained in ResultActivity or MainActivity?

CodePudding user response：

You can check an instance of this activity.

Java

        if (getActivity() instanceof MainActivity) {
//          TODO
        } else if (getActivity() instanceof ResultActivity) {
//            TODO
        }

Kotlin

        if (activity is MainActivity) {
//          TODO
        } else if (activity is ResultActivity) {
//            TODO
        }

CodePudding user response：

I think this is the best practice for you.

And to get Activity you should use requireActivity()

And to get Context you should use requireContext()

// for kotlin
fun isMainActivity(): Boolean {
    return requireActivity() is MainActivity
}

public boolean isMainActivity() {
    return requireActivity() instanceof MainActivity;
}