AndroidX Navigationを導入した話 / Introducing AndroidX Navigation

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   /BWJHBUJPO࢖Θͣ͜Ε͚ͩΛಋೖ͢Δέʔε΋ SafeArgs apply plugin: "androidx.navigation.safeargs.kotlin"

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11. ©2019 Wantedly, Inc. OnboardingActivity ϑϩʔͷߏ੒ InitialFragment WelcomeFragment SelectOccupationFragment MainActivity

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19. ©2019 Wantedly, Inc. NavHostFragmentͷ഑ஔ <androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"

    > <fragment android:id="@+id/nav_host_fragment" android:name="androidx.navigation.fragment.NavHostFragment" android:layout_width="match_parent" android:layout_height="match_parent" app:defaultNavHost="true" app:navGraph="@navigation/onboarding_navigation" /> </androidx.coordinatorlayout.widget.CoordinatorLayout>

20. ©2019 Wantedly, Inc. NavController.navigateͰભҠ // InitialFragment override fun onSignUpSuccessful(userName: String)

    { findNavController() // KTXͷ֦ு .navigate( // safeargsͰੜ੒͞Εͨίʔυ InitialFragmentDirections .actionInitialFragmentToEmailWelcomeFragment(userName) ) }

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    WelcomeFragment override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) // Disable back key requireActivity().addOnBackPressedCallback( viewLifecycleOwner, OnBackPressedCallback { true } ) }

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27. ©2019 Wantedly, Inc. ໰୊఺2ͷղܾࡦ class FitsSystemWindowsNavHostFragment : NavHostFragment() { override

    fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { // CoordinatorLayout͸fitsSystemWindowsʹରԠ͍ͯ͠Δ return CoordinatorLayout(inflater.context).apply { fitsSystemWindows = true id = this.id // ͜Ε͸NavHostFragmentͷ࣮૷ͱಉ͡ } } }

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