Get current fragment from navcontroller. val navHostFragment = supportFragmentManager.

Get current fragment from navcontroller first () It’s very ugly but from there you can check if it’s an instance of Android navigation architecture component. Navigation. For I have one NavController (navOrdersController) with 2 fragments inside. getId() You can then use this returned id to do different things in the click listener based on the Fragment, like so: How can I check if a fragment exists in back stack when using navigation component ? one thing I can think of is try to get the NavBackStackEntry by using val backStackEntry=findNavController(). In my Activity I setup the NavController in OnCreate: navController = findNavController(this, R. Commented Feb 21 at 19:50. Navigation of individual NavHostFragments is done via LiveData belong to AppbarViewModel. findNavController you've imported takes no parameters (it finds the parent NavHostFragment of the current Fragment and doesn't need the ID of the NavHostFragment). override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super. 这篇博客只讲解NavController控制器的一些API的使用详解与应用环境的说明。 不在 NavController字面意思就是导航控制器，它负责操作Navigation框架下的Fragment的跳转与退出、动画、监听当前Fragment信息，当然这些是基本操作。 When you return from EditProfileFragment, don't call navController. val navGraphIds = listOf(R. calling navigate(R. I have a problem with this scenario: ItineraryFragment is opened (at the top of the screen it is a horizontal recyclerview with some days and below the recyclerView it is another fragment); the fragment contained is filled with the attractions corresponding to the first day of the list NavController: The Key to Smooth Navigation At the heart of the Navigation Component lies the NavController, an object that manages the navigation between destinations in your app. I am currently developing an Android NFC application. I've created an application using the Bottom Navigation Activity template in Android Studio. fragment:fragment-ktx:1. setImageResource(current_item. Fragments are considered as one of the essential component Normally, I use val navController: NavController = findNavController(R. findNavController(v). In this case, when you call it. gradle I'm using navigation components and I'm trying to test my Fragment with instrumented test. listFragment) // In a Fragment findNavController(). value . findNavController(getView()). getCurrentDestination(). You can read more about it here. For example, if you have two fragment destinations on the navigation graph fragmentA and fragmentB, and there is only one action from fragmentA to fragmentB. nav_host_fragment) as NavHostFragment 获取当前可见Fragment的方法. navigate(). I want to add new fragment transition when BottomNavigationView change its current fragment. findNavController(Activity, @IdRes int) will fail. navigate(node, finalArgs, navOptions, navigatorExtras); returns the expected fragment, but the fragment does not change Because fragments are not used in Jetpack navigation, I want to observe the lifecycle of jetpack navigator to get current destination or screen name. Get navController My flow of fragment is like this. Note, this is not reflected in the NavigationAdvancedSample architecture pattern which has three separate navigation graphs without a parent navigation graph. How can I get the previous fragment name? I tried every property definied in NavController (_navigationHost) with no luck. Using Nav Graph. Am having a an Activity with a NavHostFragment which hold my Apps main navigation graph of which its HomeFragment in the NavGraph also has a NavHostFragment in it and a TabLayout, now the problem am having here is when i navigate out of the HomeFragment which has NavHostFragment in am on unable to comeback use the back botton its get stucked There are hundreds of SO answers on how to get current fragment from NavController. The fragments are divided over lots of different modules with lots of different nav_graphs. But I get null. launch { viewLifecycleOwner. 在Android开发中，使用Navigation Architecture Component可以简化导航逻辑，并且提供了一种一致的方式来管理应用中的导航流程。 If you only want to check the result when the dialog destination is closed and the underlying destination becomes the current destination, you can observe the Lifecycle associated with the NavBackStackEntry and retrieve the getSupportFragmentManager (). You will have to directly retrieve it from the support fragment manager. (navController) method. 6" FragmentA. id) // } So now I just check the ids, of the I have 3 Fragments. Follow answered Nov 8, 2022 at 22:00. layout. action_fragmentA_to_fragmentB) will result in IllegalArgumentException when Well I have some case and need to keep my current fragment even I open some new fragment, but when I put findNavController(). By the way, when the app loads a "homescreen" Fragment is loaded by the Activity, as below: First, you get the current fragment by id, then you can find the fragment, depending on that id. navigation:navigation-fragment:2. Android navigation component - change root fragment? I'm creating a portfolio app that uses Android's new Jetpack Navigation NavController. All my fragments in same navigation container. When a event happens, I want to relay the information to the current viewmodel if it implements a specific interface, if the current viewmodel doesn't implement this interface I want to handle this event in a default way. setViewNavController(fragment. val fragmentId = findNavController(). fragment_apps, true); navController. 69. class. Sasa Arsenovic Sasa Arsenovic. Once I changed the NavGraph's enclosing tag back to Fragment , it works: Here I just have a OnClickListener and navigate to the Fragment with the Runnables by using the navController in the line Navigation. IllegalArgumentException: Navigation action/destination cannot be found from the current destination Destination [Navigation Error] Hot Network Questions when tapped message icon or my page icon, the fragment is not changed; My Inspection: I debugged the application when tapped the ic ons to change fragment, in NavController. To do something with them, you should find it in your back stack and set This listener will be triggered whenever the back stack changes, allowing you to manage the current fragment accordingly. As far as I know today the only way to get it is to access to primaryNavigationFragment from the navigation fragment's childFragmentManager. Navigation Component , add or replace fragments or other things like hide show fragments. and update the current fragment name. 3. Replace fragment on nav host without destroying. RelativeLayout{cf3c6de V. getParent()). So when you've navigated back to previous screen, there is no Views of previous fragment in the Get fragment from NavController. I want to retrieve the currently displayed fragment in FragmentContainerView from MainActivity as I want to modify the "Edit" button setOnClickListener function to perform "Save" function (I already know how to change the text from Edit to Save) I've started using Android Architecture Components (Navigation and Safe Args, View Models) along with Koin library. popBackStack(R. toolbar)) val Android Navigation Architecture Component - Get current visible fragment. When I switch between tabs I want to store travel stack, that allow to return on current tab state. joinToString(" > ") { it. I'm creating a single-activity app that uses NavController and fragments to display each screen. Did you read the guide to customizing the back button? It actually has an example of intercepting back in a Fragment. in build. While introducing the FragmentContainerView this week the starting destination’s screen doesn’t render at launch. current community. My goal is that when the now what will happen is when you click on next or previous button it will first get the current destination id then it will check that in which fragment you are now. 13. Home - Search - Profile 3 - You can also use a sharedviewmodel (a viewmodel that follows the activity scope but can be accessed in the fragments) for this having all fragments listening to it, and you could pass the "current" fragment information (be it the classname or some identifier) in an event you are exposing in the sharedviewmodel for the fragments listen. My goal is that when the onNewIntent method is called, so when the NFC tag is detected, I update the UI with the information in the tag. split('/')[1] } // e. Add a parent navigation graph for the BottomNavigationView menu items. I need to get the current visible fragment instance on the Activity and based upon that I need to call a method of that fragment. g. childFragmentManager. navigate to simulate back stack functionality, but I would like to hear how this problem can be solved with BottomNavigationView, NavController, NavHostFragment, FragmentNavigator scope. public static NavController findNavController(@NonNull Fragment fragment To avoid this approach of static way, I am thinking if there is any better way to do it. E. So far, so good. Commented Oct 31, 2021 at 11:05 | Show 1 more comment. navigate(navDirections) viewLifecycleOwner. Commented Jan 11, 2020 at 22:15. OnDestinationChangedListener() { @Override public void onDestinationChanged(@NonNull NavController val breadcrumb = navController . getId() I will assume that you're working with a MainActivity that presents a list fragment, which can then present another list Get the samples and docs for the features you need. 1. navigate() as it will keep your current fragment in the backstack and push your target fragment to the backstack. setCurrentDestination(R. nav_host) throws the following excep I have a MainActivity and in it I have a navController with a mainFragment that serves as NavHost for 4 fragments (Feed, Notifications, Profile and Help). fragment_profile) As a result current scenario of BottomNavigationView is. screen rotation) , navigating between fragments doesn't save fragment's state. fragment_company); the first line removes the back Stack till it reaches the fragment specified in my case it's the home fragment 可能这里你会比较陌生，这里的id，等下要在MainActivity中指明的，这里的name指明的是androidx. The fragment isn't destroyed - you'd get a callback to onDestroy() if that was the case. In my MainFragment class, when trying to initialize NavController in the onCreateView, I get a RuntimeException caused by: IllegalStateException: View android. findNavController(Activity, R. Because of the navController, I As per @slhddn answer and comment this is how I'm using it and retrieving the fragment id from the nav_graph. findNavController(this, R. 0 on 2. Share. Here is an example with Navigation Component. putString("id", id) (activity as MainActivity). DrawerLayout drawer = You are correct that you cannot use rememberNavController() - that will create a completely new nested NavController suitable only for composable destinations. navController. . FragmentContainerView using findNavController. 0 application is crashed after press button "Back". Currently, I've got a problem with passing arguments between two fragments - I need to pass a string value from fragment A to fragment B, modify this value in fragment B and pass it back to fragment A. – Chhatrasal Singh Bundela I'm trying to get the backstack count, but i always get 0 from both fragment managers. xml file:. Here you see Using SharedPreference. destination?. To get the current fragment that’s active in your Android Activity class, you need to use the supportFragmentManager object. My current code does something similar, but there is a bug to it: override So, attempting to retrieve the NavController in onCreate() of the Activity using Navigation. 0, you can get a reference to the NavBackStackEntry for any destination on the navigation stack by calling NavController. Kotlin version: val navHostFragment = supportFragmentManager. Either of those happen synchronously, and so the fragment will exist within the onCreate() call itself where you used You shouldn't use the navigation component to navigate from one activity to another. Get current visible fragment. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super. Follow answered Nov 29, 2021 at 6:33. First, make sure your activity extends AppCompatActivity. This guide describes how you can use the Navigation component to navigate to a destination in various contexts. Ask Question Asked 3 years, 4 months ago. 633 Why fragments, and when to use fragments instead of activities? 1 Passing Bundle Your approach is good, but it's doing many unnecessary expensive Fragment lookups. fragment_container_view). Instead of that you can use SharedPreference to store a value that maps to last open fragment before the app exists. onCreate(savedInstanceState) setContentView(R. But our logic requires also to know which was the previous destination for the current destination in order to hide/show the bottom navigation bar. currentNavController which returns NavController of current NavHostFragment on screen due. When user uses menu (it's in main activity), and goes another page, I want to add name of the current fragment to backstack (using . getBackStackEntryCount(); I guess it should work since i checked the google code of fragment navigator and it adds to backstack through the canonical fragment I'd like to write the previous fragment name in the current fragment. activity_main) setSupportActionBar(findViewById(R. This causes the Fragments in the FragmentManager to be reattached, which involve calling Fragment#onAttach; The Fragment is injected in Fragment#onAttach; Dagger tries to provide the NavController; BUT you cannot get the NavController from the Activity by this point, as Activity#onCreate has not finished yet and you get I am trying create deeplinks to specific screens via incoming push notifications on our Android app by calling NavController. Now I use view binding in the app just like detailsScenario. onFragment { fragment -> navController. setGraph(R. getBackStackEntryCount(); return fm. There is no way I can find to retrieve the current fragment instance. Android - Get current fragment. The NavigationView code with NavController and NavigationUI is below which is opening fragment when I click on any navigation item. FirstFragment is just blank kotlin class where layout contains just one TextView. init() } fun // In an Activity findNavController(R. currentDestination?. As per the original question, if your NavHostFragment is defined as <fragment android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/nav_host" app:navGraph= "@navigation/nav_item" 同时Activity的左上角ActionBar 有个回退的箭头。非常简单的代码，就能实现了无限切换fragment的布局，不管你有多少个fragment 都能随时切换，完全可以用来 单个Activity ,多个 fragment 架构APP。 以下是Test6_Activity,就是一个 viewpager2，以及Mobile_Fragment 的生命周期监控回调，就是为了在 onResume 的时候取到 I have a complicated structure where a number of Fragments link to each other, so using NavController I am trying to avoid creating multiple duplicates of the same Fragment in the BackStack. 3 Is there a way Main fragment is the camera fragment using Camera2 API. kt Im using Navigation Component which navigates between fragments using findNavController(). By using the methods outlined above, you can effectively manage your fragments The current Fragment from FragmentNavigator's perspective can be retrieved by calling FragmentManager. id. xml Once you get the current fragment by its tag, you can use the is operator again to check the fragment’s instance type. But there is a some animation problem while closing drawer. My problem is with the third of these fragments, in which I need it also has its own navController with 3 options (Activities, Achievements, and Edit Profile). But when the app tries to navigate to the specific Fragment an exceptionis thrown: java. Meta Stack Overflow your communities . I create a NavHostFragment programmatically in the method onCreate method of my Activity just like this article says, but then the method findNavController(R. I've created a fragment with a RecyclerView that will be populated with views that you can click on to navigate to various app demos (and maybe actual apps I've made if I can figure that out). When you’re developing an Android application with Java, you The Navigate to a destination documentation goes through many ways to get access to the NavController, including the NavHostFragment. nav_host_fragment) navController. navigate(FR_MenuDirections. nav_discover, I have one NavController (navOrdersController) with 2 fragments inside. Login section successful process to redirect to Profile. findFragmentById (R. 2. (I've added below) is the best solution, but it worked for me to get the recent/current fragment added in NavHostFragment used in Android That template uses the "new" (?) NavigationController for navigating between a set of sample fragments from the Navigation Drawer. fragment_container); The Navigation component provides a straightforward and generic way of navigating to a destination. For instance, assume you've 3 fragments: fragment_a, fragment_b, and fragment_c. We use NavController. That's what caused the issue. This interface supports a range of contexts and UI frameworks. findNavController if it doesn't find the NavController using the fragment. I want to enter the next fragment from left to right. (new NavController. If the screen is rotated, the current Fragment disappears and my "homescreen" Fragment is displayed. nav_host_fragment) If I need to know on which menu item my user is currently I just get the current destination's id like this: val menuId = (activity as MainActivity). Fragments are lighter versions of activity and hence they are used in most of the cases for displaying the UI of the application. The full sample code is included within BottomNavigationSample. If you want to go back without I have a single-Activity native app with a few Fragments. java. So you should use Navigation Component facilities like NavController, NavDestination, BackStackEntry and its SavedStateHandle. It needs to be high enough that all the composables that need to reference it can do so. In fragment C, I use this. 431 3 3 silver badges 6 6 bronze badges. My current fragment is OrderDetailFragment and I want access to first Fragment (OrdersFragment) to update data in MainActivity. fragments. I want to call some methods in the selected Fragment after it changes. It's similar to startActivityForResult logic. I am using Jetpack Navigation Components. It worked just as I wanted! Original post: I am using the new navigation component with a single Activity approach in the app. navigate(), fragment transaction manager remains the node of the fragment in the chain of fragments(or stack of fragments), but it also removes View Hierarchy of previous fragment. (holder: ViewHolder, position: Int) { val current_item = imageList[position] holder. You can get the navigation id of the current Fragment with: navController. The fragment has a custom toolbar initialized in onViewCreated method by an extension function. I have four destinations in my BottomNavigationView, all of them have their navigation graphs. However, you can get the ID of lastly added fragment using the code below. val bundle = Bundle() bundle. id. nav_host_fragment); Solution 1. In the main activity's onCreate() method I added an OnDestinationChangedListener to the NavController. someaction) in my click listener, its always logcat error: invoke suspend at findNavController(). This follows the navController = findNavController(R. widget. Home - Search - Login. onNavDestinationSelected() to get the right behavior: @Override public boolean onOptionsItemSelected(MenuItem item) { NavController navController = Navigation. If the back To obtain the NavController instance, you can use the Navigation. Android Navigation: Access NavHostFragment from same Fragment. 11. I feel Example you have selected 2nd Number navigation it have inside 5 fragment. Now the Fragment with the Runnable, called Test is created. Currently, I can go from one fragment to another and return on a back press. Current NavController is set onResume to - > Fragment will save its state only when activity is recreated (e. Write and debug code Build projects As per the Navigate to a destination documentation, the androidx. findNavController(R. findNavController() method, which takes the ID of the NavHostFragment as an This application contains a NavigationDrawer in which I can access 3 different fragments which each correspond to 3 different NFC features. Android Jet Pack Navigation, setupWithNavController() recreating fragment. Viewed 3k times The supportFragmentManager doesn't get me the fragment, maybe because i use a FragmentContainerView ? – Foxhunt. Get fragment from NavController. build. Sign There is any option to load a new fragment with NavController? If, not there is any alternative solution for this? I recently switched over to Android Navigation, but have encountered a fair amount of situations (in different parts of the code), where I get: Fatal Exception: java. lang. I searched a lot but couldn't find any suitable solution. I have a nav_main which includes a nav_sub_1. implementation "androidx. While I pretty much love the way it works, I'm looking for a way to prevent navigating to another fragment if the current fragment is dirty (for example: contains unsaved changes). As per the testing guide, it is strongly recommended to avoid any direct references to any NavController within any of your composables themselves (i. actionFRMenuToTest());. Otherwise, you will not be able to use I am using a navigation graph to navigate Fragments on Android. handleDeeplink(intent). getName())), but I couldn't find how to get current fragment. //on click song details fun onSongInfoClick(v: View) { val navController = findNavController(R. Crash always after return from other fragment to previous fragment containing FragmentPagerAdapter. action_c_to_a) nav_graph. I'm trying to find the id for the last fragment navigated to using navController since I'm using the Navigation component instead of fragment managers: override fun onBackPressed() { val fragme I tried to get the fragment by writing the ID of the fragment found in the navigation graph. if your navController in MainActivity, with this code you can access to navController and send data to fragment. We connect the controller to the nav graph XML file I am trying to apply a lesson I have seen about the Navigation Drawer Activity with Fragments and MVVM &quot;the new Components&quot;, in this simple app I have three Fragments I try to navigate be To provide some background, I'm using a NavController to navigate between Fragments in a single Activity application. findNavController(Fragment) method, which lets you get This episode continues our Jetpack Navigation implementation/migration and introduces the NavController. Use a NavController. But it return to fragment c instead. How i can get the current selected fragment id in navigation graph while i'm using two graphs. nav_host_fragment. 6 Android supports passing data between fragments or between fragments and activities. (Activity) => supportFragmentManager. The only other possibility I have in mind is to pass its name as an argument while navigating. map { it. – Derek K. And at the fragment_c you need to know from which it's reached: To The best way to achieve this is to register a fragment lifecycle callback. Create a parent level navigation graph for the menu fragments. The problem I'm having is when I rotate the screen. addOnDestinationChangedListener { _, destination, _ -> val isNewFullscreen = isFullscreen(destination. Android Navigation findNavController when NavHost is not in Activity. navigateUp(). IllegalArgumentException If you're using Navigation Component, should avoid using fragment related objects like tag, fragmentManager, findFragmentByTag/Id, setTargetFragment, . getBackStackEntry(), passing it a destination ID. But after update androidx dependencies from androidx. popBackStack(fragmentId!!,true) findNavController(). I think there's a more standard way of accessing the view rather than using ((ViewGroup) getView(). e. I want to save the state of this fragment (with the text there) when navigating to another fragment and the coming back to the fragment A (and have the text still there from the previous button navController. The supportFragmentManager has findFragmentById() and findFragmentByTag() Determining the currently displayed fragment in Android requires a combination of tagging, fragment management, and back stack handling. nav_home, R. NavHostFragment) In my Fragments, I setup the NavController in onViewCreated: From the default nav-graph, I can navigate to all the hosted fragments. repeatOnLifecycle(Lifecycle So, to get the id of the previous destination use: previousBackStackEntry?. 5. You can check if best way to use Navigation Graph is after the view is created, since some view takes time to create so u might get this exception as your view is still in processing or creating the view. java; Current fragment instance. orderDetailFragment, bundle) for get data in tl/dr: You should be following the Tie destinations to menu items documentation and using NavigationUI. you can get the backStack property of NavController The problem might be that FAB was added to the activity or a fragment different from the one used by NavHost fragment. Stack Overflow help chat. putString val navController = requireActivity(). Otherwise things like up behaviour won't act as expected and will lead to the navController no longer directing according to the navGraph which will cause crashes. following is the complete code of this method from NavHostFragment and it only calls Navigation. Or you can use setContentView() to use a layout file with a <fragment> tag. Here is the solution recommended by the official Android documentation. findFragmentById (R. you are on 4th fragment and you have exit current fragment and get back to 2nd number navigation 1st or 2nd fragment???? – Dens. navigate(R. displayName. Determining the currently displayed fragment in Android requires a How can I get the currently displayed Fragment instance in Android - Introduction Android applications are built using different components such as Activities as well as Fragments. I am trying to use Navigation but I am simply missing something. destination } . I want to set ToolBar style per Fragment keeping the navigation controller functionality (like navigation up and titles). I after the onResume() method of each fragment I check the authentication state, If the user is not authenticated the user will be navigated to the login fragment. getBackStackEntryAt(count - 2). EDIT: Now I have edited onClickListener, I am not able to change the current view, I need to use popBackStack on current fragment, but donot know how. nav_host_fragment_content_main); // By calling current community. NavController navController = Navigation. setupWithNavController(navController) It will check current fragment with destinations and if both are same, it will only close drawer. Even if the app is not closed, you can't rely on them for storing large objects or storing objects for a long time. Anyway, I would suggest to use OnBackPressedCallback directly in the fragment. 0-alpha07 It would be great if we can have an easy way to access the currently displayed fragment. Modified 3 years ago. getName(); } I am working on a Project that uses Single Activity Multiple Fragments. listFragment) NavController. first (). getBackStackEntryCount(); getFragmentManager(). Navigation Component is not replacing current fragment activity. So instead of checking the authentication state in each fragment which will lead to lots of code duplication. imageId) I like use data binding and navigation graph. and you want some data from fragment B to Fragment A. onViewCreated(view, savedInstanceState) tbBlack. 1 Get a state value in navigationOption? 20 Get Backstack status using android navigation component. – ianhanniballake. id In general I don't see any reason to prefer the v. 2. findFragmentById(R. A better solution would be to behave just like the YouTube app: (1) Tap Home; (2) Tap Trending; (3) Tap Inbox; (4) Tap I am using Navigation graph and i want to use NavController for going to another fragment. currentDestination changes you can fire a Broadcast to the service class. which I intended to launch from fragments like this. id findNavController(). 0. detail) Navigation. You can either check that your FAB belongs to the fragment pulled by NavHost or call an Activity's findNavController(<id>) and pass it id of the fragment you're if you want to reload/refresh you current fragment after perform specific operation you have to destroy this current fragment and navigate here again. NavHostFragment，这个属性就表明这个fragment指明的就是NavHost，然后它还要添加需要显示的子Fragment，那么就通过navGraph来绑定这个导航图，之前导航图里面不是就有五个Fragment吗？ I set up the second toolbar with the NavController using the same method I used for my MainActivity. As you know Jetpack navigation is not using fragments rather it uses deep linking structure. You can get navController inside activity using. NavDestination newDest = navigator. findNavController(). nav_host_fragment) in Code A to find NavController, it's based R. Each menuitem in bottomnavigationview is considered primary - thus, when BACK is pressed, the app finishes (or goes to the top component). fragment. I don't want to implement interface etc to keep track of current fragment. Starting with Navigation 2. graph. nav_host) bottom_navigation. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company val navController = Navigation. addToBackStack(Fragment1. nav_graph) // Use whatever destination ID is associated with your DeatilFragment navController. FragmentContainerView>. 9. Doing so lets you to use the NavController as the single source of truth for updating composables outside of your screens. I was While this solution works (fragments are reused, not re-created), there's a problem with the navigation. imageViewFlashcards. id to get the current graph id, but it seems the id I get from there does not match up with my resource id's (eg. @MuhammadBabar: You can try executePendingTransactions() on FragmentManager after calling commit() on the transaction, though I have not tried this. navController What I have done: I have created Navigation Drawer Activity, As updated new format of Navigation Drawer Activity, As per new Android architecture, I got it with Navigation Component structure. navigateUp() // to clear previous navigation history Component used: Navigation Version used: 1. findNavController() it cannot find the navigation controller. filterNot { it is NavGraph } . currentBackStack . getFragmentManager (). simple_dialog, bundle) Listener is implemented in fragment which the dialog is launched from As per this issue, when using FragmentContainerView, you need to find the NavController using findFragmentById() rather than using findNavController() when in onCreate():. eg: Suppose you open Fragment B from Fragment A using navController. The key type you use to move between destinations is the NavController. Conclusion. Improve this answer. requireView(), navController) } For example, you can use the Navigation component with Compose, views, fragments, activities, and even custom UI frameworks. nav_host_fragment) as NavHostFragment val navController = navHostFragment. Main -> A -> B -> C ->A In fragment c, it has a submit button which will return to A. getPrimaryNavigationFragment() with the FragmentManager passed Fragment currentFragment = getActivity (). navigation. gradle. In my app I'm using navController to switch between fragments. Get the current fragment using Java. I fixed it by including my nested graph into the main graph. I’m in the launcher’s xml, replacing the <fragment> with <androidx. When I press back button in A, I want it back to Main. You should create the NavController high in your composable hierarchy. load new fragment : val bundle = Bundle() bundle. nav_host_fragment); NavController navController I have tried using navController. action1); /*vs*/ I'm using button navigation and NavController. The naive approach would be override onBackPressed in activity and then just create own logic separately and manually use navController. I have also faced the same issue and figured out that we are making the wrong direction action in the navigation_graph XML file. I found this post How to check Navigation Destination is in the NavController back stack or not?, which I have implemented as below: August 2020 update. I am able to navigate using NavGraph, NavHost and NavController but the problem is, there are multiple situations where I need to move from one fragment to other fragment and vice-versa and require to clear the backstack accordingly. 文章浏览阅读570次。同时Activity的左上角ActionBar 有个回退的箭头。非常简单的代码，就能实现了无限切换fragment的布局，不管你有多少个fragment 都能随时切换，完全可以用来 单个Activity ,多个 fragment 架构APP。以下是Test6_Activity,就是一个 viewpager2，以及Mobile_Fragment 的生命周期监控回调，就是为了在 I need to display custom AlertDialog, but only when there are no more fragments after calling NavController. IllegalArgumentException: saveBackStack("95f6209a-b0e7-46f9-a37e-6c01ee5fb1fc") must not contain Lint in Android Studio Canary was telling me to use a FragmentContainerView instead of a Fragment in the NavHost activity xml layout. Now I need to return to the previous Fragment in an OnClickListener imbedded in a FloatingActionButton hosted in an Activity that hosts the Fragment instead of a back press. Say one of my Fragments is loaded, like the one above. , a HomeScreen composable). app. nav_sub_1 also includes another sub graph, nav_sub_2 When I When you are navigating to the other fragment via findNavController(). getSupportFragmentManager(). How can I get the selected Fragment from the onDestinationChanged() in the How can I add Fragment Change Listener in new Navigation Component? I have a BottomNavigationView in which I used new Navigation Component following official sample. onSaveInstanceState & onRestoreInstanceState can't be used to store/restore values after the app is closed/shut. I'm currently populating the list manually, but I'd like to automate that process. Android Check currentDestination before calling navigate might be helpful. None of these solutions fixed my issue. This application contains a NavigationDrawer in which I can access 3 different fragments which each correspond to 3 different NFC features. navController. The NavController library not supported the DialogFragment, it supports only full-screen fragments. If we put both answers together, you can add TAG's to your fragments and get the previous Fragment name with this method: private String getCallerFragment(){ FragmentManager fm = getFragmentManager(); int count = getFragmentManager(). navController You can maintain a string in the service class and whenever your navController. first_fragment > second_fragment > third_fragment My answer does not guarantee to print the current fragment, but to print fragments in the back stack. The app has a home screen and contains three other menu items in the nav drawer so the user can visit different websites in an external browser. The initial implementation has worked as intended for a year. navigate(fragmentId) Since Fragment KTX 1. The navigation action direction should be from homeFragment to PaymentOptoinFragment. val navHostFragment = supportFragmentManager. Instead, the val navController = rememberNavController (). It is made to swap fragments on a Fragment container. OnDestinationChangedListener and the provided parameter NavDestination to hide/show the bottom navigation bar (which is anchored in the root activity) depending on the current destination. Samples User interfaces Background work Data and files Connectivity All core areas ⤵️ Tools and workflow; Use the IDE to write and build your app, or create your own pipeline. findNavController over the Fragment extension. 0. How to pop through fragment stack in When using the Navigation component, it is simple to navigate to the next fragment and also simple to pop back to the previous fragment. lifecycleScope. How to get current time and date in Android. fuzktz iesa rytkhb zghdkr kresa fng tuc iveu erz cpyt azo vcjhu fyj lckbol oxh