在 Android 中将 Fragment 作为 Activity 调用

Question

我有这个需要活动的方法，但我想将它与片段一起使用，但它给我一个错误“不兼容的类型”

fun loadUserData(activity: Activity) {
    mFireStore.collection(Constants.USERS).document(getCurrentUserID()).get()
        .addOnSuccessListener { document ->
            Log.e(activity.javaClass.simpleName, document.toString())

            val loggedInUser = document.toObject(User::class.java)!!

            when (activity) {
                is LogIn -> {
                    activity.signInSuccess(loggedInUser)
                }
                is  NavigationHomePage->{
                    activity.updateHomeUserHomeScreen(loggedInUser)
                }
            }
        }
        .addOnFailureListener { e ->
            Log.e(
                activity.javaClass.simpleName,
                "Error while getting loggedIn user details", e
            )
        }
}

NavigationHomePage 是片段.. 那么如何准确地做到这一点

Answer 1

使用 requireActivity()。

fun loadUserData() {
    mFireStore.collection(Constants.USERS).document(getCurrentUserID()).get()
        .addOnSuccessListener { document ->
            Log.e(requireActivity().javaClass.simpleName, document.toString())

            val loggedInUser = document.toObject(User::class.java)!!

            when (requireActivity()) {
                is LogIn -> {
                    requireActivity().signInSuccess(loggedInUser)
                }
                is  NavigationHomePage->{
                    requireActivity().updateHomeUserHomeScreen(loggedInUser)
                }
            }
        }
        .addOnFailureListener { e ->
            Log.e(
                requireActivity().javaClass.simpleName,
                "Error while getting loggedIn user details", e
            )
        }
}