Android navcontroller get current fragment graph. Based on this solution I've created a kotlin function that can check whether the current fragment is of a specific type (instead of the id): To get the current fragment that’s active in your Android Activity class, you need to use the supportFragmentManager object. xml file:. FragmentNavigator:. id. setGraph(): Use the ID of the graph: You are correct that you cannot use rememberNavController() - that will create a completely new nested NavController suitable only for composable destinations. Of course, this principle will work also with a fragment class Otherwise, you can set start destination arguments by calling one of the following overloads of NavController. Modified 1 year, 4 months ago. I am able to navigate using NavGraph, NavHost and UPDATE - Nov 2021. But navController = findNavController(R. OnDestinationChangedListener and the provided parameter NavDestination to hide/show the bottom navigation bar (which is anchored in the root activity) Updating a known property of a TextView like text size is not the sort of the thing you should need to call invalidate() for; the framework does this for you when the property changes. AnEnigmaticBug How to close current fragment in Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about I have an Activity with a fragment container in layout. drawer_layout) val navView: NavigationView = findViewById(R. As per the All of my fragments are controlled through ActionBarActivity (mainActivity), inside mainActivity a DrawerLayout is implemented and all the child fragments are pushed through Complete code of passing data using fragment to fragment. The whole navigation has changed in the past 4 years and I also found out that I have mixed Later, I navigate to Fragment B to Fragment C. questionanswer) // using this i swap the fragment on host I resolved my issue, which was that I have tried to implemented 3 different styles of Navigation. I added fragment findNavController(R. This guide describes how you can use I need to display custom AlertDialog, but only when there are no more fragments after calling NavController. Skip to main content. 0-alpha07 brings some changes. Follow answered Dec 22, 2018 at 11:04. case I'm integrating Android's Navigation Architecture Components into my app. However, it is required for a View to be attached to the When using the Navigation component, it is simple to navigate to the next fragment and also simple to pop back to the previous fragment. New release androidx. So onStop() of LoginFragment will be if you want to reload/refresh you current fragment after perform specific operation you have to destroy this current fragment and navigate here again. Modified 8 years, 6 months ago. android; android-fragments; or ask your own navController = findNavController(R. navInflater val navGraph = graphInflater. Now I use view binding in the app just like current community. For example, if you have two fragment destinations on the navigation graph fragmentA and fragmentB, and To avoid this approach of static way, I am thinking if there is any better way to do it. More explanations in android official guide: Provide custom back When using NavigationUI. You can check if your expected fragment exists in Get the latest Stay in touch with the latest releases throughout the year, join our preview programs, and give us your feedback. Improve this answer. navView val navController = popBackStack() is not working in android NavController. I need to use navGraphViewModels(graphId). Meta Stack Overflow If I put it in my MainActivity then I have the issue of the FloatingActionButton not having a NavController set. There is no support for adding fragments. As the user navigates to screens throughout your app, the NavController adds and As per this issue, when using FragmentContainerView, you need to find the NavController using findFragmentById() rather than using findNavController() when in This will help you get the current fragment using navigation components – Zain. I want to retrieve the currently displayed fragment in Although they are not identical as suggested by the top voted answer, the performance difference should be negligible in general scenarios. Here is a code snippet from androidx. Profile), TopLevelRoute ("Friends", Friends, Icons. When user uses menu (it's in main activity), and goes another page, I want to add name of the I've started using Android Architecture Components (Navigation and Safe Args, View Models) along with Koin library. Fragment 1 -> Fragment 2 -> Fragment 3 if the previous id of Fragment 3 is >Fragment 2 then go back to it with arguments. Now, in 2020, if you are working with Kotlin and want to change the 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 When you give the <COMP_SPEC> parameter, you get more information on the specific component, including the visible fragments and views. How to get the current visible fragment in android? 4. replace(), FragmentTransaction. v4. get(0)); return getSupportFragmentManager(). If you My app starts with NewAdFragment and inside this fragment, There is a button that allows user to choose the category, When the user clicks on the button I'll navigate him to In old way, if I use activity instead of using Fragment, I usually do something like this to get that expected behaviour: val intent = Intent(this,HomeActivity::class. . OnClickListener interface. But I also will have a situation where this will happen: Fragment 4 -> Well I have some case and need to keep my current fragment even I open some new fragment, but when I go to another fragment, then come back to this one (with navController. You can get the navigation id of the current Fragment with: As per @slhddn answer and comment this is how I'm using it and retrieving the fragment id from the nav_graph. Ask Question Asked 3 years, 6 months ago. addToBackStack("fragB"); To handle this case we need to listen to back stack changes and every time it’s changed get current fragment and execute `fragment. navigate(R. navigation:navigation-fragment-ktx:2. If I want to back to Fragment-A , I have to click the back Thanks for the comments, I'm actually built an application a little different from the common one and that there are services working in the background where the user can be Newest Update - April 25th, 2019. but i wonder i can use Activity with Navigation component?? the reason what i say is that some I started a new app with the default android bottom navigation menu. Step-by-step guide with code examples to manage fragments effectively in your app. Fragment in 1st position has a tag of "f0". public class MyFragment extends Fragment { private onFragmentInteractionListener Your approach is good, but it's doing many unnecessary expensive Fragment lookups. I after the onResume() method of UPDATE. class YourActivity : Activity() { private lateinit var binding: val topLevelRoutes = listOf (TopLevelRoute ("Profile", Profile, Icons. When I navigate away from the HomeFragment its view will be Normally, I use val navController: NavController = findNavController(R. However if you use the This solution works perfectly for bottom bar based fragment navigation when you want to close the app when back pressed in primary fragment. Current fragment to back I'm creating a portfolio app that uses Android's new Jetpack Navigation NavController. There is any option to load a new fragment with NavController? If, Using DialogFragment as one of the Fragment in Android To get a correct behavior of toolbar and drawer with multiple top level destinations, you can use following code: val navController = Navigation. It works fine inside fragments but it fails to find the nav host in the activity that holds the actual navigation host. inflate(R. For more None of these solutions fixed my issue. My problem is with . I have a problem with this scenario: ItineraryFragment is opened (at the top of the screen it is a horizontal In an android application I'm loading data from a Db into a Can I repopulate the Fragment with current data . 0. 0-alpha4, the official Android developer guide recommends to use the Activity/Fragment Result APIs over I'm trying develope single-activity application using the navigation to corresponding fragment from my home fragment under certain conditions (see my code fragment below). The most proper way is to make your Activity implement an Interface and use listeners. The navigation action direction should be Answering my own question as I found the correct approach in the updated Navigation documentation. YourActivity. get(0); You also can use the navController to check your assertions by comparing the current route to the expected one, using navController's currentBackStackEntry: @Test fun My solution is to use one method for navigation and execute Fragment. remove() method is called and the Loginfragment will be removed. I fixed it by including my nested graph into the main graph. Because I made a base fragment and every fragment needs to be inherited from it. I tried to Since you have used ft2. ) Then I I am wondering if there is a way to add another fragment to the screen without replacing the old one with the Navigation Graph. 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 For example, you can use the Navigation component with Compose, views, fragments, activities, and even custom UI frameworks. Fragment fragment = new Fragment(); // replace your custom fragment class Bundle bundle = new Bundle current community. Possible Basically, I have the following navigation graph: I want to change my starting point in navigation graph to fragment 2 right after reaching it (in order to prevent going back to fragment 1 when pressing back button - like with the The note about being careful is wrong: it is not required to add the View via onCreateView for this to work. Refer to this. I have Two fragment. you are on 4th fragment and you have exit current fragment and get back make sure you use to If you need root view of your activity (so you can add your contents there) use. findFragmentById(R. I also cannot You can create an interface in fragment class and implement it in your MainActivity class. That way the Fragment isn't tied to any specific Activity keeping it We use NavController. Commented Oct 30, 2021 at 23:55. Log. nav_host) Note: We strongly recommend using the Navigation library to manage your app's navigation. And in your activity, your viewpager should implement OnPageChangeListener, like this:. public NavDestination navigate(@NonNull val navController = Navigation. Instead of the headache of tracking the previous fragment with passed-in arguments, you'd use previousBackStackEntry which returns a NavBackStackEntry that is:. app. Here is an example 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 Im using Navigation Component which navigates between fragments using findNavController(). It's similar to startActivityForResult logic. Currently, I can go from one fragment to another and return on a back press. Stack Overflow. replace(R. Perhaps NavController is a powerful tool for managing navigation in Android apps, enabling smooth transitions between screens, deep linking to specific destinations, and handling the back stack effectively. So when I navigate between fragments, it replaces the entire screen. Otherwise you need I am using The new Navigation Architecture Component in android and I am stuck in clearing the navigation stack after moving to a new fragment. id to get the current graph id, Android Navigation Architecture Component Passing argument(s) to a nested Navigation I also had the same use-case in my app but the scenario was quite complex on my side. Friends)). Stack Overflow help chat. Also getActivity(). getId() I will assume that you're working with a Android navigation architecture component. getString("Argument") However on app start up argument is I have found a solution for this exception, the findNavController() throws this exception when trying to call this method within a fragment that is not NavHostFragment or not within So, each of your fragments should implement View. d(TAG,"Fragment="+getSupportFragmentManager(). 1. How can I get the previous fragment name? I tried every property definied in NavController (_navigationHost) I have also faced the same issue and figured out that we are making the wrong direction action in the navigation_graph XML file. and you want some data from fragment B to Fragment Alternatively, you can use your own variable to check whether the last added fragment is the same as the current fragment. Init ViewModel by navGraphViewModels (Live on Navigation scope); Store any to-restore state in ViewModel // fragment. kt private val vm by You can do that programmatically from Kotlin code if you need some extra logic while doing pop up. So this is a very old question and has great answers from that time. That Viewpager itself also contains Fragments. The framework follows best practices for working with fragments, the back stack, and the fragment manager. navigation. Currently, I've got a problem with passing arguments 22 May 2024 Stephan Petzl Leave a comment Tech-Help. I ran into some problems with passing data to the start of a fragment from an activity, so I was I have tried using navController. On the other hand when you are opening 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. 0-alpha02 and Androidx Fragment 1. getPrimaryNavigationFragment(); Fragment fragment = navHostFragment. 0-alpha01. Fragment", therefore I have to use "getSupportFragmentManager()". Android find current fragment. 6 Android supports passing data between fragments or between fragments and activities. container); } public Fragment If you are using the Views UI framework, you can retrieve your NavController using one of the following methods depending on the context: Kotlin: Java: Typically, you first get a Fragment navHostFragment = getSupportFragmentManager(). getRootView() Also it was reported that on some devices I have one activity and few fragments. From the default nav-graph, I can navigate to all the hosted fragments. kt. The supportFragmentManager has findFragmentById() and findFragmentByTag() Learn how to get the currently displayed fragment in Android. I want to move the You can do it like this: val drawerLayout: DrawerLayout = findViewById(R. Share. fragment. getBackStackEntryCount(); returning 0. But a lot has changed since then. val current community. I am using a navigation graph to navigate Fragments on Android. In my app I'm using navController to switch between fragments. implementation "androidx. Actually I use the Navigation Component for passing value between fragments. build. Like this: SecondFragment:. private lateinit var navController: NavController navController = Jetpack Navigation Component supports replacing fragments as of now. getSupportFragmentManager(). popBackStack(); There's really no way to do this. We will be creating a simple project in which we will be With the rise of Android Jetpack redefining many of our fundamental Android practices, we got a new way to add fragments, and more ways to navigate around them. 2. findViewById(android. When I press back button in A, I want it back to Main. A simple way of doing this is using a trick related to the FragmentPagerAdapter implementation:. Workaround to retain api data in fragment when back button is Here is the solution recommended by the official Android documentation. Now I need to return to the I am working on a Project that uses Single Activity Multiple Fragments. Example: I am in the loginFragment and I want this fragment to be I am using Navigation Component for navigating in my app. 3. Sample Fragment. val fragmentId = Since Fragment KTX 1. I want to do this because the new fragment I have a Viewpager2 inside a Fragment (lets call it HomeFragment). Now, I want to check in the Fragment C that is there Fragment A available in the back stack. This application contains a NavigationDrawer in which I can access 3 different fragments which each correspond to 3 Latest Stuff. But if you just need to remove PinSetupFragment from your back stack, Example you have selected 2nd Number navigation it have inside 5 fragment. It looks like the following: The In this article we will take a look at How we can get the currently displayed Fragment instance in Android. But I think there's a more standard way of accessing the view rather than using ((ViewGroup) getView(). nav_host_fragment. getChildFragmentManager(). activity ver. navController. Code: It may help to post your navigation graph, but I think you can solve this in one of two ways: (1) a local action available to the category fragment, or (2) a global action available to the entire graph. Kotlin version: val navHostFragment = val drawerLayout: DrawerLayout = binding. I'm retrieving the the argument in the HomeFragment via val argument = arguments?. findNavController(activity!!,R. Main -> A -> B -> C ->A In fragment c, it has a submit button which will return to A. R. In my MainFragment class, when trying to initialize NavController in the onCreateView, I get a RuntimeException caused by: IllegalStateException: View I have a navigation controller fragment defined inside my activity_main that has a match height and width of parent. I I have many (non support) fragments, and all of them are using same holder (one at a time). SecondFragment and ThirdFragment. class MainActivity : AppCompatActivity() { override fun Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about Remark: My fragment extends "android. navhost_fragment) navController. something_graph) ORIGINAL ANSWER. Get fragment My answer does not guarantee to print the current fragment, but to print fragments in the back stack. navigate(resId, args) In method onBackPressed val navHostFragment = 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. Meta Stack Overflow Attach our app navigation graph to this NavHostFragment--> <fragment android: Thanks for the answer Alex. Fragment in 2nd position has a tag of "f1". 3 different Fragment can be displayed in it. I've created a fragment with a RecyclerView that will be populated with views Fragment fancyFragment = new FancyFragment(); fragmentTransaction. findNavController(this, I open some main fragment FragA, which then can open other fragments, that are added to the stack, but when I press back I show a DialogC, which should clear the stack and get me back I'd like to write the previous fragment name in the current fragment. If yes, I want to pop out all I am currently developing an Android NFC application. I set up my activity with NavController and navigation graph like this:. In your BottomNavigation composable, by selecting an option, I need to update the fragment that is currently visible. Example when Android device settings In the activity, I need to know if my current fragment is the Fragment3, so I call the onBackPressed of my fragment instead calling super. I would get from it, the current fragment displayed. getParent()). Okay. Working with fragments in Android can be challenging, especially when you need to determine which fragment is currently displayed. i ended up using registerForActivityResult() and it worked well. My current code does something similar, but there is If you use FragmentContainerView and ViewBinding, here is a cleaner way to do it:. navHostFragment). drawerLayout val navView: NavigationView = binding. Starting with Androidx Activity 1. Ask Question Asked 8 years, 6 months ago. eg: Suppose you open Fragment B from Fragment A using navController. While adding fragments to the back stack, just give them a name. In other words, the current destination. Latest updates Instead of replacing TextView fragment with Button fragment, the Button fragment is stacked on top. navigate(). Each menuitem in bottomnavigationview is considered primary - thus, Warning: You can encounter problems when creating the NavHostFragment using FragmentContainerView or when manually adding the NavHostFragment to your activity using where navController is initialize in onCreate. I have a nav_main which includes a nav_sub_1. public class SomeFragment extends Fragment { public View view; public TextView textView; public Button button; @Override public View I have problem making my fragments communicating with each other through the Activity, which is using the FragmentPagerAdapter, as a helper class that implements the I tried like this, and it works for me. getFragments(). I am using Jetpack Navigation Components. gradle. I need to get the current visible fragment instance on the Activity and based upon that I I am trying to apply a lesson I have seen about the Navigation Drawer Activity with Fragments and MVVM "the new Components", in this simple app I have three My flow of fragment is like this. 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 NavController is used to navigate from one destination to another destination which can be retrieved by following one of the static methods :. It back to the empty background. The NavController holds a "back stack" that contains the destinations the user has visited. nav_view) Check currentDestination before calling navigate might be helpful. nav_sub_1 also includes another sub graph, nav_sub_2 When I I am using Android navigation component and I want to create a viewModel with the current graph scope. navigate(my_destination_id)) - the But when I click the back button on Fragment-C , it doesn't back to the Fragment-A. findFragmentByTag(null); using this above line i am trying to In ViewPager2 the FragmentManager by default have assigned tags to fragments like this:. nav_host_fragment) val graphInflater = navController. support. 0-alpha03" Here's the documentation for the NavController. You can pop the fragment by name. At the time of writing this answer, I am using Navigation 2. setUserVisiblityHint(boolean) every time fragment’s visibility changed. In the basic main fragment I added the buttons for all the fragments (I want to show them in the bottom navigation but also in the main fragment. the problem is that I use current fragment In my project I have a main activity which host the default navController. fragmentTransaction. content_container, fancyFragment, "myfragmentag"); Fragment currentVisibleFragment = getSupportFragmentManager(). override fun onCreate(savedInstanceState: Bundle?) { Hi there I'm going through the guides for navigation on the developer Android site, and I followed the instructions to create a NavHostFragment: <fragment I assume you are using kotlin and One Activity pattern ,do the following steps. FragmentActivity: Android Fragments I create a NavHostFragment programmatically in the method onCreate method of my Activity just like this article says, but then the method findNavController(R. content). navigateUp(). These fragments contains a Listview which displays data with custom Adapter i Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about thank you. java) Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about 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 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). nav_host_fragment) in Code A to find NavController, it's based R. I've only encountered workarounds such as setting a background color, and 前言在项目中，有时会用到在ViewPager中显示同样类型的Fragment，同时这样的Fragment的个数是动态的，但是PagerAdapter没有给我们提供getCurrentFragment类似的方法。下面就给大 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(){ While this solution works (fragments are reused, not re-created), there's a problem with the navigation. userVisibleHint = true`. setupWithNavController(bottom_navigation_view,navController) (or, if you're I have read the solutions here but in my case, I would like to get the navHostFragment and then navigate to the next destination in the action.
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