android - グラフ間の Android Advanced Navigation ディープリンク

Question

しばらくの間、Android Advanced Navigationを使用しています。現在のプロジェクトには、3 つのナビゲーション グラフがあります。問題は、あるグラフの一部のフラグメントが別のグラフから到達する必要があることです。これを解決するために、ディープ リンクを作成しました。

たとえば、グラフ A にグラフ B を含め、グラフ B からのディープ リンクを使用してその特定のフラグメントに到達しました。問題は、私がグラフ B にいて、グラフに戻りたいときです。AI はできません。グラフ A はグラフ B に含まれていないため、現在のナビゲーション コントローラーは目的地を見つけることができません。グラフ A をグラフ B に含めると、別の問題が発生します。循環インポートの問題があるため、Android Studio はプロジェクトをビルドできません (グラフ B はグラフ A をインポートしようとしますが、グラフ B は既にグラフ A に含まれています)。他に何をすべきか本当にわかりません。

3 つのサブグラフすべてを含む 1 つの巨大なナビゲーション グラフを作成しようとしましたが、この Android Advanced Navigation では機能しませんでした。より効率的な方法はありますか？

編集してコードを追加します。

BottomNavigationView 拡張機能:

fun BottomNavigationView.setupWithNavController(
    navGraphIds: List<Int>,
    fragmentManager: FragmentManager,
    containerId: Int,
    intent: Intent
): LiveData<NavController> {

    // Map of tags
    val graphIdToTagMap = SparseArray<String>()
    // Result. Mutable live data with the selected controlled
    val selectedNavController = MutableLiveData<NavController>()

    var firstFragmentGraphId = 0

    // First create a NavHostFragment for each NavGraph ID
    navGraphIds.forEachIndexed { index, navGraphId ->
        val fragmentTag = getFragmentTag(index)

        // Find or create the Navigation host fragment
        val navHostFragment = obtainNavHostFragment(
            fragmentManager,
            fragmentTag,
            navGraphId,
            containerId
        )

        // Obtain its id
        val graphId = navHostFragment.navController.graph.id

        if (index == 0) {
            firstFragmentGraphId = graphId
        }

        // Save to the map
        graphIdToTagMap[graphId] = fragmentTag

        // Attach or detach nav host fragment depending on whether it's the selected item.
        if (this.selectedItemId == graphId) {
            // Update livedata with the selected graph
            selectedNavController.value = navHostFragment.navController
            attachNavHostFragment(fragmentManager, navHostFragment, index == 0)
        } else {
            detachNavHostFragment(fragmentManager, navHostFragment)
        }
    }

    // Now connect selecting an item with swapping Fragments
    var selectedItemTag = graphIdToTagMap[this.selectedItemId]
    val firstFragmentTag = graphIdToTagMap[firstFragmentGraphId]
    var isOnFirstFragment = selectedItemTag == firstFragmentTag

    // When a navigation item is selected
    setOnNavigationItemSelectedListener { item ->
        // Don't do anything if the state is state has already been saved.
        if (fragmentManager.isStateSaved) {
            false
        } else {
            val newlySelectedItemTag = graphIdToTagMap[item.itemId]
            if (selectedItemTag != newlySelectedItemTag) {
                // Pop everything above the first fragment (the "fixed start destination")
                fragmentManager.popBackStack(firstFragmentTag,
                    FragmentManager.POP_BACK_STACK_INCLUSIVE)
                val selectedFragment = fragmentManager.findFragmentByTag(newlySelectedItemTag)
                        as NavHostFragment

                // Exclude the first fragment tag because it's always in the back stack.
                if (firstFragmentTag != newlySelectedItemTag) {
                    // Commit a transaction that cleans the back stack and adds the first fragment
                    // to it, creating the fixed started destination.
                    fragmentManager.beginTransaction()
                        .setCustomAnimations(
                            R.anim.nav_default_enter_anim,
                            R.anim.nav_default_exit_anim,
                            R.anim.nav_default_pop_enter_anim,
                            R.anim.nav_default_pop_exit_anim)
                        .attach(selectedFragment)
                        .setPrimaryNavigationFragment(selectedFragment)
                        .apply {
                            // Detach all other Fragments
                            graphIdToTagMap.forEach { _, fragmentTagIter ->
                                if (fragmentTagIter != newlySelectedItemTag) {
                                    detach(fragmentManager.findFragmentByTag(firstFragmentTag)!!)
                                }
                            }
                        }
                        .addToBackStack(firstFragmentTag)
                        .setReorderingAllowed(true)
                        .commit()
                }
                selectedItemTag = newlySelectedItemTag
                isOnFirstFragment = selectedItemTag == firstFragmentTag
                selectedNavController.value = selectedFragment.navController
                true
            } else {
                false
            }
        }
    }

    // Optional: on item reselected, pop back stack to the destination of the graph
    setupItemReselected(graphIdToTagMap, fragmentManager)

    // Handle deep link
    setupDeepLinks(navGraphIds, fragmentManager, containerId, intent)

    // Finally, ensure that we update our BottomNavigationView when the back stack changes
    fragmentManager.addOnBackStackChangedListener {
        if (!isOnFirstFragment && !fragmentManager.isOnBackStack(firstFragmentTag)) {
            this.selectedItemId = firstFragmentGraphId
        }

        // Reset the graph if the currentDestination is not valid (happens when the back
        // stack is popped after using the back button).
        selectedNavController.value?.let { controller ->
            if (controller.currentDestination == null) {
                controller.navigate(controller.graph.id)
            }
        }
    }
    return selectedNavController
}

private fun BottomNavigationView.setupDeepLinks(
    navGraphIds: List<Int>,
    fragmentManager: FragmentManager,
    containerId: Int,
    intent: Intent
) {
    navGraphIds.forEachIndexed { index, navGraphId ->
        val fragmentTag = getFragmentTag(index)

        // Find or create the Navigation host fragment
        val navHostFragment = obtainNavHostFragment(
            fragmentManager,
            fragmentTag,
            navGraphId,
            containerId
        )
        // Handle Intent
        if (navHostFragment.navController.handleDeepLink(intent)
            && selectedItemId != navHostFragment.navController.graph.id) {
            this.selectedItemId = navHostFragment.navController.graph.id
        }
    }
}

private fun BottomNavigationView.setupItemReselected(
    graphIdToTagMap: SparseArray<String>,
    fragmentManager: FragmentManager
) {
    setOnNavigationItemReselectedListener { item ->
        val newlySelectedItemTag = graphIdToTagMap[item.itemId]
        val selectedFragment = fragmentManager.findFragmentByTag(newlySelectedItemTag)
                as NavHostFragment
        val navController = selectedFragment.navController
        // Pop the back stack to the start destination of the current navController graph
        navController.popBackStack(
            navController.graph.startDestination, false
        )
    }
}

private fun detachNavHostFragment(
    fragmentManager: FragmentManager,
    navHostFragment: NavHostFragment
) {
    fragmentManager.beginTransaction()
        .detach(navHostFragment)
        .commitNow()
}

private fun attachNavHostFragment(
    fragmentManager: FragmentManager,
    navHostFragment: NavHostFragment,
    isPrimaryNavFragment: Boolean
) {
    fragmentManager.beginTransaction()
        .attach(navHostFragment)
        .apply {
            if (isPrimaryNavFragment) {
                setPrimaryNavigationFragment(navHostFragment)
            }
        }
        .commitNow()

}

private fun obtainNavHostFragment(
    fragmentManager: FragmentManager,
    fragmentTag: String,
    navGraphId: Int,
    containerId: Int
): NavHostFragment {
    // If the Nav Host fragment exists, return it
    val existingFragment = fragmentManager.findFragmentByTag(fragmentTag) as NavHostFragment?
    existingFragment?.let { return it }

    // Otherwise, create it and return it.
    val navHostFragment = NavHostFragment.create(navGraphId)
    fragmentManager.beginTransaction()
        .add(containerId, navHostFragment, fragmentTag)
        .commitNow()
    return navHostFragment
}

private fun FragmentManager.isOnBackStack(backStackName: String): Boolean {
    val backStackCount = backStackEntryCount
    for (index in 0 until backStackCount) {
        if (getBackStackEntryAt(index).name == backStackName) {
            return true
        }
    }
    return false
}

private fun getFragmentTag(index: Int) = "bottomNavigation#$index"

ナビゲーション グラフ:

<?xml version="1.0" encoding="utf-8"?>
<navigation 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:id="@+id/home_nav_graph"
    app:startDestination="@id/homeFragment">

    <fragment
        android:id="@+id/homeFragment"
        android:name="lu.thebiggame.fragments.home.HomeFragment"
        android:label="home_fragment"
        tools:layout="@layout/home_fragment" >
        <action
            android:id="@+id/homeToGameResults"
            app:destination="@id/gameResultsFragment" />
        <action
            android:id="@+id/homeToPlayLottoGames"
            app:destination="@id/playLottoGamesFragment" />
    </fragment>
    <fragment
        android:id="@+id/checkoutFragment"
        tools:layout="@layout/checkout_fragment"
        android:name="lu.thebiggame.fragments.checkout.CheckoutFragment"
        android:label="CheckoutFragment" />
    <fragment
        android:id="@+id/gameResultsFragment"
        android:name="lu.thebiggame.fragments.gameresults.GameResultsFragment"
        android:label="game_results_fragment"
        tools:layout="@layout/game_results_fragment">
        <deepLink
            android:id="@+id/gameResultsFragmentDeepLink"
            app:uri="app://home/game-results-fragment" />
        <action
            android:id="@+id/gameResultsToPlayLottoGames"
            app:destination="@id/playLottoGamesFragment" />
    </fragment>
    <fragment
        android:id="@+id/congratulationsFragment"
        android:name="lu.thebiggame.fragments.congratulations.CongratulationsFragment"
        android:label="congratulations_fragment"
        tools:layout="@layout/congratulations_fragment" >
        <action
            android:id="@+id/congratulationsToClaim"
            app:destination="@id/claimFragment" />
        <deepLink
            android:id="@+id/congratulationsFragmentDeepLink"
            app:uri="app://home/congratulations-fragment" />
    </fragment>
    <fragment
        android:id="@+id/claimFragment"
        tools:layout="@layout/claim_fragment"
        android:name="lu.thebiggame.fragments.claim.ClaimFragment"
        android:label="ClaimFragment" />

    <include app:graph="@navigation/profile_nav_graph"/>
    <fragment
        android:id="@+id/aboutGameFragment"
        android:name="lu.thebiggame.fragments.page.PageFragment"
        android:label="page_fragment"
        tools:layout="@layout/page_fragment">

        <deepLink
            android:id="@+id/aboutGameFragmentDeepLink"
            app:uri="app://home/about-game-fragment" />
    </fragment>
    <fragment
        android:id="@+id/playLottoGamesFragment"
        android:name="lu.thebiggame.fragments.play.lottogames.PlayLottoGamesFragment"
        tools:layout="@layout/play_lotto_games_fragment"
        android:label="PlayLottoGamesFragment" >
        <action
            android:id="@+id/playLottoGamesToCheckout"
            app:destination="@id/checkoutFragment" />
        <deepLink
            android:id="@+id/playLottoGamesDeepLink"
            app:uri="app://home/play-lotto-games-fragment" />
        <action
            android:id="@+id/playLottoGamesToGameResults"
            app:destination="@id/gameResultsFragment" />
    </fragment>

</navigation>

<?xml version="1.0" encoding="utf-8"?>
<navigation 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:id="@+id/games_nav_graph"
    app:startDestination="@id/gamesFragment">

    <fragment
        android:id="@+id/gamesFragment"
        android:name="lu.thebiggame.fragments.games.GamesFragment"
        android:label="games_fragment"
        tools:layout="@layout/games_fragment" />

    <include app:graph="@navigation/home_nav_graph"/>
</navigation>

<?xml version="1.0" encoding="utf-8"?>
<navigation 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:id="@+id/profile_nav_graph"
    app:startDestination="@id/profileFragment">

    <fragment
        android:id="@+id/profileFragment"
        android:name="lu.thebiggame.fragments.profile.ProfileFragment"
        android:label="profile_fragment"
        tools:layout="@layout/profile_fragment" >
        <action
            android:id="@+id/profileToResults"
            app:destination="@id/resultsFragment" />
        <action
            android:id="@+id/profileToHelp"
            app:destination="@id/helpFragment" />
        <action
            android:id="@+id/profileToPersonal"
            app:destination="@id/personalFragment" />
        <action
            android:id="@+id/profileToChangePassword"
            app:destination="@id/changePasswordFragment" />
        <action
            android:id="@+id/profileToPage"
            app:destination="@id/pageFragment" />
    </fragment>
    <fragment
        android:id="@+id/resultsFragment"
        android:name="lu.thebiggame.fragments.results.ResultsFragment"
        android:label="results_fragment"
        tools:layout="@layout/results_fragment" >
        <argument
            android:name="startingTab"
            app:argType="integer"
            android:defaultValue="0" />
        <deepLink
            android:id="@+id/resultsFragmentDeepLink"
            android:autoVerify="true"
            app:uri="app://profile/results-fragment" />
        <action
            android:id="@+id/resultsToClaim"
            app:destination="@id/claimFragmentResults" />
    </fragment>
    <fragment
        android:id="@+id/helpFragment"
        android:name="lu.thebiggame.fragments.help.HelpFragment"
        android:label="help_fragment"
        tools:layout="@layout/help_fragment" >
        <action
            android:id="@+id/helpToPage"
            app:destination="@id/pageFragment" />
        <action
            android:id="@+id/helpToContact"
            app:destination="@id/contactUsFragment" />
        <action
            android:id="@+id/helpToFaq"
            app:destination="@id/faqFragment" />
    </fragment>
    <fragment
        android:id="@+id/personalFragment"
        android:name="lu.thebiggame.fragments.personal.PersonalFragment"
        android:label="personal_fragment"
        tools:layout="@layout/personal_fragment" />
    <fragment
        android:id="@+id/changePasswordFragment"
        android:name="lu.thebiggame.fragments.changepassword.ChangePasswordFragment"
        android:label="change_password_fragment"
        tools:layout="@layout/change_password_fragment" />
    <fragment
        android:id="@+id/pageFragment"
        android:name="lu.thebiggame.fragments.page.PageFragment"
        android:label="page_fragment"
        tools:layout="@layout/page_fragment" />
    <fragment
        android:id="@+id/contactUsFragment"
        android:name="lu.thebiggame.fragments.contactus.ContactUsFragment"
        android:label="contact_us_fragment"
        tools:layout="@layout/contact_us_fragment" />
    <fragment
        android:id="@+id/faqFragment"
        android:name="lu.thebiggame.fragments.faqfragment.FaqFragment"
        android:label="faq_fragment"
        tools:layout="@layout/faq_fragment" />
    <fragment
        android:id="@+id/claimFragmentResults"
        tools:layout="@layout/claim_fragment"
        android:name="lu.thebiggame.fragments.claim.ClaimFragment"
        android:label="ClaimFragment" />


</navigation>

下部ナビゲーションの初期化:

    private fun setupBottomNavigationBar() {

        activityMainBottomNav.itemIconTintList = null

        val navGraphIds = listOf(
            R.navigation.home_nav_graph,
            R.navigation.games_nav_graph,
            R.navigation.profile_nav_graph
        )

        val controller = activityMainBottomNav.setupWithNavController(
            navGraphIds = navGraphIds,
            fragmentManager = supportFragmentManager,
            containerId = R.id.nav_host_container,
            intent = intent
        )

        currentNavController = controller
    }