Onbackpressed function in fragment But what about when we have nested fragments ? for example we have child fragment inside another fragment ? Aug 9, 2016 · There is no onBackPressed() method in Fragment. For the app exit case, check if the current fragment is MainFragment with the help of fragment tag and calling fragmentmanager. onBackPressed() from your Fragment. 💡 Mar 18, 2020 · One of the nice things that recently was introduced in the Android world in devSummit19 was the new way of handling back presses in the fragments which always was a bit of pain to implement. A Fragment might be used to present a sliding drawer, tabbed content, a page in a ViewPager, or it might simply represent a normal screen in a single- Activity app. popBackStack() or super. Jun 7, 2021 · When trying to use the back button of a dialog fragment I'm curious as to the difference between using onBackPressed() (or onBackPressedCallBack) and onCancel(). onBackPressed simulates a native back press in any fragment. createFlutterFragment does not automatically enable that argument. You should be navigating from Fragment to Fragment, or if you forgo Fragments then Activity to Activity. This pattern also fits incredibly well with Jetpack Compose. We will extend FragmentStateAdapter. It is the modular section of the android activity that is very helpful in creating UI designs that are flexible in nature and auto-adjustable based on the device screen size. popBackStackImmediate () like the code below: How To Migrate The Deprecated OnBackPressed function In Your Android App Yanneck Reiß 3. In order to trigger system animations such as back-to-home, cross-activity, and cross-task, supportFragmentManager 's back stack must be empty so its internal callback is disabled. And when I click the button at Fragment-B , it will t Jun 11, 2024 · 文章浏览阅读6. 그러나 안드로이드의 Fragment에는 Activity의 onBackPressed()와 같은 콜백 메소드가 없기 때문에 별도의 리스너를 만들어 액티비티에서 back press 이벤트가 발생했을 시 해당 프래그 Jul 16, 2018 · I have an activity that calls a fragment as seen below: Nav drawer in main activity: @SuppressWarnings("StatementWithEmptyBody") @Override public boolean onNavigationItemSelected(MenuItem item) { Dec 7, 2020 · 2 You should use addToBackStack() while fragment transaction. You can do something like calling getActivity(). What happens? the third option that implements onBackPressed () works for me, make sure that you actually have something to go back to. Sep 18, 2015 · I have a fragment which controlled all interactions (to speak) I wonder as I link myonbackpressed, to do the same as the other function onBackPressedCustom It is complex to understand. In Main Activity I implemented popBackStack(); in onBackPressed(); So that, you can always go back to previous fragment clicking back button. When I press the key on the last screen or when I put a button on the screen and set the button function as val navıgattor = activ Sketchware Codes DzonBackPressed for webview in fragment activity Block for sketchware & Code java in this short tutorial i'll show you how to get the function if onBackPressed WebView goBack in fragment activity, in sketchware. Firstly create an interface named OnBackPressed and the interface contains the function onBackPressed (any name you would prefer). 2 If someone wants to handle backPressed for a webView inside a fragment, then he can use below code. But why is that and what does that mean for our Android apps and how can we replace the May 14, 2025 · Activity onBackPressed () If you are using onBackPressed() to handle Back button events, we recommend using a OnBackPressedCallback instead. I noticed that on pressing the back button the Fragment is destroyed. As an example, If you add Fragment B to an existing Fragment A via add () method but without addToBackStack (), then onBackPressed () will NOT pop Fragment B to get back to Fragment A, but causes onStop () on the parent activity. 11 Sometimes is useful to override method onBackPressed () because in case you work with fragments and you're changing between them if you push backbutton they return to the previous fragment. popBackStack() can also work but in Mar 10, 2021 · I opened the dialog fragment by clicking on the recycler view item implemented in the activity. Next, perform a check to see if the 'BACK' button is pressed again within 2 seconds and will close the app if it is so. Jul 23, 2016 · Also I trying to implement this using Fragment interface but I don't know how to put implementation of interface function in onBackPressed function to parent Activity. Copy below code into your Activity class (that contains a fragment YourFragmmentName) typescript Copy Jul 23, 2025 · Step #1: Upgrade to AndroidX Activity 1. Jul 11, 2021 · But if i remove return statement inside if check (in onBackPressed function), then it pops 2 fragments at once from back stack. Jan 23, 2017 · When the first Fragment reaches and you click the back button again, it shows a white screen. Back press -> It is the action of pressing button by gesture navigation or soft back button Nov 3, 2011 · So, care must be taken in the way you add fragments. onBackPressed (). I have 5 fragments that I want to go back to my HomeFragment when I click on back pressed. @Override Feb 10, 2025 · If you want to show multiple fragments at once, such as in a split-view or a dashboard, you can use child fragments that are managed by your destination fragment and its child fragment manager. Usually, we used it to intercept on… Dec 5, 2022 · While Targeting Android 13 , OnbackPressed Override Function is deprecated😢. The default implementation simply finishes the Mar 25, 2021 · I have one activity application with multiple fragments, Onbackpressed function is working correctly while I go to the other fragment from the home fragment it's working correctly but when I am on onBackPressed() Called when the activity has detected the user's press of the back key. 2019 For developers Table of Contents [hide] 1 How to refresh Activity from fragment in Android? 2 How to save and restore fragment state in Android? 3 When to call activity onbackpressed ( ) in fragments? 4 How to tell fragments when the back button has been pressed? Jan 3, 2019 · I am using the Navigation Architecture Component for Android. In fragment [B], I add button to get Another fragment just call it Fragment [D], but if in Fragment D i pressed back button app return into fragment [A]. But, now it’s time to change/move…. However FlutterFragmentActivity. After I update the user profile, when I click on BackPressed Button to Back to the Account Fragment,the Account Fragment didn't refrech and the new information didn't appear. The expression passed in the top Detail() function emits a Jan 13, 2014 · Do I need to call onBackPressed in every fragment (if that's even possible) rather than the FragmentActivity that controls the drawer? In my past apps I've been OK with the back button closing the app regardless of which Fragment the user is on but the one I'm making now I want the back button to go back to Fragment1. onBackPressed() is the system-level callback, that again runs if the above callbacks are disabled. onBackPressed you can simply use isTaskRoot to Apr 12, 2021 · It showcases a simple unidirectional data flow, which is a recommended pattern for modelling the UI state and user interaction. Mar 9, 2019 · As @Derek Zhu pointed out, it seems that if you override onBackPressed in your activity then the Fragment's onBackPressedCallback doesn't work. Basically What I did was create other fragment Dec 28, 2013 · I have try to close the current fragment by using Imagebutton. You might consider doing something like this. May 13, 2020 · Android App을 개발하다 보면 화면을 구성할 때 하나의 액티비티에 다수의 프래그먼트를 사용해서 구성하는 경우가 많습니다. onBackPressed() has been deprecated in the Android 13 release and the reason to deprecate this is to enable the support for the future predictive back gesture. flutter/engine#25453 adds Fragment support for the API, gated behind an argument. Many questions on SO and elsewhere focus on how to handle &q Nov 24, 2015 · No need to do code in Fragment B to come back to Fragment A, it will automatically handle, when you press hard back key, if you want to add custom button for coming back from Fragment B to Fragment A than you have to add getActivity. For one of my fragments I wish to intercept "back" and "up" navigation, so that I can show a confirmation dialog before discarding any TargetSdkVersion 34 will replace `onBackPressed ()` with the newly added OnBackInvokedCallback in Android 13, and `onBackPressed ()` + `KEYCODE_BACK` will stop working Mar 3, 2019 · Fragment側のメソッドが実行される分岐に入ると Activity#onBackPressed において super. Nov 26, 2022 · Targetting Android 13 makes my favourite OnbackPressed Override Function was deprecated😢. kt file), I am tracking the fragments that are loaded for the first time and adding Sep 18, 2015 · I have a fragment which controlled all interactions (to speak) I wonder as I link myonbackpressed, to do the same as the other function onBackPressedCustom It is complex to understand. But popBackSt Aug 29, 2019 · How to refresh Activity from fragment in Android? Jacob Wilson 29. Add onBackPressedCallback in the Fragments onCreate () method. You can override the Activity's onBackPressed () method and check if there is any previous fragment in the backstack to pop back by calling getFragmentManager (). Which lead me to this question. If it is, ask the fragment if the webview can go back. 말그대로 사용자가 뒤로 가기 버튼을 클릭 했을 때 해당 메서드가 호출된다. 2w次，点赞4次，收藏10次。本文介绍了一种优雅地处理Android中Fragment返回键的方法。通过在Activity和Fragment间使用接口，可以轻松实现不同Fragment间的返回键逻辑处理。 Aug 10, 2020 · I progress in fragments with the Android navigation architecture. id. Simply add these lines of code in your Activity's onBackPressed () Mar 16, 2017 · One way would be saving previous fragment (previousFragment) variable while opening new fragment and making it null when you are in first or placeholder fragment . Aug 12, 2013 · I am working on a project and I need to be able to use the back button in each fragment to navigate between previous fragments, I have methods written to do so by using a back arrow in the action b Feb 14, 2023 · The implementation is straightforward, after performing the action we just delegate to onBackPressed() -> onBackPressedDispatcher. onBackPressed() accordingly. Here's how the 💻 Join my new Refactoring Legacy Code course now: https://bit. onBackPressed() as there is no way to directly call app. Fragments on the other hand use onBackPressedDispatcher / OnBackPressedCallback In this video, learn Managing Fragment Backstack in Android | Android Studio Tutorial. Dec 15, 2022 · Now when I press the back button the onBackPressed event is triggered and you can check the currently active fragment and implement your custom code. . primaryNavigationFragment ?. Test the predictive back gesture animation Jan 3, 2021 · Listening to the back button click event inside the fragments, comprised of a painful implementation of the interfaces and the onBackPressed method calls in both Activity and Fragment, prior to the introduction of the OnBackPressedDispatcher. Can you please explain me with a example. 08. My apps stick to one or two activities and everything else is kept neatly in fragments which are replaced Feb 1, 2014 · I am using a navigation drawer and fragments to inflate the main activity. This solution works perfectly for bottom bar based fragment navigation when you want to close the app when back pressed in primary fragment. ly/47dzTLT📩 Sign up for my new newsletter here 👉 https://bit. Sep 3, 2023 · Learning Android Development The onBackPressed Is Now Deprecated in Android 13 and Might Need Major Changes in Existing Apps Migrate to Android 13's “Predictive Back” Before It’s Too Late Sep 5, 2015 · This is pretty basic Java but actually quite essential for any fragment-heavy application. xml以及在Activity和Fragment中处理返回手势的示例。 Aug 25, 2022 · When I replace a fragment (using a function I have defined in a utils. This will allow you to go to the previous fragment on back-press. Jan 23, 2017 · Goot this errors . Create an adapter to connect between fragments and the ViewPager. many people are searching for solution or how to do that so Let's Start we don't need for get this function many things, just we need one block or one code you can Oct 15, 2017 · I added Home Fragment to navigation view but I don't know how to make it default so that if user opens the App, default home Fragment opens up. (I added onBackStackChangedListener and i can see how many items are left when i pop, so if there are 3 fragments i back stack when i pop it removes 2 fragments and only 1 remains, and then if i click back again, it We would like to show you a description here but the site won’t allow us. I found that if I wanted to also use it in the activity then I needed to use onBackPressedDispatcher. I have a FrameLayout in this fragment that I replace with fragments to navigate between pages. If you are using a Layout as container for Fragments you can get Fragment by following two methods in Activity. onBackPressed(), I call my own callback, creating an infinite loop instead of handing this over to the system like I would with super. onBackPressed() is a function in Activity, not in Fragment. refreshFragment(); }else { super. and then after button click event in Fragment 1 open new Fragment 4. private void displaySelectedScreen(int itemId) { Fragment fragment = null; Aug 31, 2022 · So I have came across two solutions for achieving this problem, The first is to use the old function of onBackPressed, instead of calling the super. kt Jul 19, 2011 · Then I override the onBackPressed function in the activity to define the navigation within fragments. kt file), I am tracking the fragments that are loaded for the first time and adding them to the BackStack so that I can pop them and prevent duplicates of that fragment from being added to the BackStack. I had to do it this way because for whatever reason, the viewPager fragment does't appear in the activities fragments. Jan 8, 2021 · Photo by Nick Fewings on Unsplash Android Fragment 에서는 Activity 에 존재하는 override function 인 onBackPressed() 를 지원하지 않는다. Learn how to effectively resume a previous fragment in Android when using the onBackPressed () method. The official documentation states that onBackPressed () method is called when the activity has detected the user's press of the back key. Implement the onBackPressed function in your MainActivity. So. Wow , it was awesome , thank you sooo much . 따라서 Fragment 에서 BackPress 의 동작을 제어하기 위해서는 OnBackPressedCallback 오브젝트를 Fragment 가 속해 있는 Activity 에 등록해주어야 한다. I found way out from this (which is suggested in the question's answers) but it's ugly. Why has this been deprecated? What changes do we need to make after this change?In this article, we'll briefly delve into all these questions. And for the back function I used onBackPressedCallback(). If I understand correctly, to enable support for the new API, devs will have to override that method and implement May 16, 2015 · 文章浏览阅读2. This method may (and typically must) be declared in other or even multiple fragments with different viewModels. In what Nov 16, 2012 · A quick fix that handles the simplest cases is to change the onBackPressed (FragmentManager fm) function and switch the block that pops the backstack with the one that enumerates fragments. May 22, 2024 · Learn how to implement onBackPressed () in Android Fragments, with alternative methods to override onBackPressed () in Android 3. You may find more details here stackoverflow - onBackPressed () deprecated, What is the alternative? and a migration guide at Medium - How To Migrate The Deprecated OnBackPressed Function. after clicking navigation drawer item it open a Fragment 1, fragment 2, Fragment 3. Suppose, I wanted to show fragment 2 if user is in fragment 3 and presses back so I did something like this to achieve this Jun 22, 2025 · In Android, the Fragment is the part of the Activity that represents a portion of the User Interface (UI) on the screen. In order to check when the 'BACK' button is pressed, use onBackPressed () method from the Android library. As an addendum to Juan Pedro Martinez's answer I thought it would be helpful to clarify a specific question (one that I had) when looking at this thread. Because that my R. In Android, a Fragment represents a modular piece of a larger UI. Here is the relevant logic for how that is being managed in my Utils. If you wish to create a new DialogFragment and have it so the user can only cancel it using the back-button, which eliminates random screen touches from canceling the fragment prematurely, then this is the code that you would use. Any other page in the viewPager implements IRegistrationBackPressed which just calls the viewPager fragment's onBackPressed function I showed above. Sep 2, 2023 · I hope this guide has helped demystify the process of implementing onBackPressed () in Fragments for you. Apr 27, 2024 · OnBackPressed deprecated, what’s the alternative? Handling the Back Button with a Modern Approach for All Views Navigating backward in an Android app is an integral part of the user experience … May 21, 2025 · Goodbye to onBackPressed (): A Guide to Modern Back press Handling in Android Handling the back button is a core part of Android navigation. However, I tried to display a toast message Override the onBackPressed inside the activity. How can I don't lose all the fragments when the back Apr 8, 2022 · There is nothing simpler, just extend/implement your BaseFragment class/interface and handle back-press events in onBackPressed () properly or just return false to ignore it. app. Usually, we used to intercept on backpress and add animations. 54K subscribers Subscribed Jul 5, 2018 · FragmentProfile fragment = //Get the Fragment from Fragment Manager Here fragment. In that declaration, we override the handleOnBackPressed() function that is the equivalent to the deprecated onBackPressed() function. The method onBackPressed () of type FBFragment must override or implement a supertype method The method onBackPressed () is undefined for the type Fragment Apr 6, 2022 · I know that I should call onBackPressed () function but I dont know how to write the code for it, so that it land me on the home fragment. When to call activity onbackpressed ( ) in fragments? Jun 26, 2022 · My understanding is that registering an OnBackInvokedCallback to an Activity's onBackInvokedDispatcher replaces usages of custom back invocations usually put in onBackPressed(). onBackPressed (); if you do not want the default action (finishing the current activity) to be executed. onBackPressed() to trigger the usual back press behaviour if I want to close the screen after the second back-press? Jan 3, 2021 · Fragment无法像Activity那样重写OnBackPressed方法，所以拦截Back键相对比较复杂，但这又是一个常见需求，例如以下场景：在SearchFragment中，点击back键时，关闭SearchView而非直接退出使用FragmentManger一个常见做法是定义一个带有OnBackPressed的方法的接口或基类给Fragment继承 Nov 8, 2016 · When I press back key from Fragment_2, I'm navigated back to Fragment_1 But when I press back key from Fragment_3, I'm navigated back to Fragment_1 (instead of Fragment_2) I want something like this in my application on Back Key press Fragment_1 < Fragment_2 < Fragment_3 I have used Fragment, FragmentManager, FragmentTransaction as follows : Nov 3, 2016 · Your fragment has already been added to backstack. May 9, 2017 · You dont really need to override onBackPressed () inside the MainActivity but explicitly cast on each fragment and assigning the BottomNavigation like this: FragmentA. Cheers ! Inside activities on back pressed put this: May 20, 2019 · I have implemented navigation Drawer with Navigation Components in Android. After reading the linked documentation, it states that you should avoid overriding onBackPressed in your activity. Step-by-step guide with code snippets. Fragment which displays a Flutter UI that takes up all available Fragment space. onBackPressed () is a method that is to be implemented in our activity in order to run a function Jun 9, 2019 · if your activity override onBackPressed() and it have some logic for the fragment onBackPress then please remove that part and after that it will works as expected Dec 31, 2014 · 6 i have Fragment Activity With contatin navigation drawer. we all know, this onBackPressed function will call as soon as the Back button is clicked (Hardware) or back pressed from the navigation gesture. Feb 15, 2023 · The problem with this code: by calling onBackPressedDispatcher. However, if you are unable to make this change, the following rules apply: All callbacks registered via addCallback are evaluated when you call super. May 17, 2021 · For now, disable the onBackPressed function on the MainActivity. addCallback there also. Using a FlutterFragment requires forwarding a number of calls from an Activity to ensure that the internal Flutter app behaves as expected: onPostResume() onBackPressed() onRequestPermissionsResult(int, String[], int[]) onNewIntent(Intent) onUserLeaveHint() onBackPressed() does not need to be called through if the Mar 17, 2017 · make an function in fragment and call it from onBackpressed () from activity using fragment object. onBackPressed(); } ComponentActivity가 들고 있는 메서드이고 AppCompatActivity 는 FragmentActivity를 상속 받고 FragmentActivity는 Mar 7, 2020 · Learn how to override the onBackPressed() method in Android to require the user to press the back button twice to exit the app, or prevent them from exiting Jun 26, 2018 · The official method to provide custom back navigation only works for the native button. Copy below code into your Activity class (that contains a fragment YourFragmmentName) typescript Copy In this article, we will see how to replace deprecated onBackPressed() implementation with OnBackPressedCallback based implementation. findNavController()?. and Fragment [A] is default fragment, if Fragment [B] or [C] press back button must return to Fragment A. 이제 차례차례 어떻게 제어할 수 있는지에 Jan 8, 2021 · Photo by Nick Fewings on Unsplash Android Fragment 에서는 Activity 에 존재하는 override function 인 onBackPressed() 를 지원하지 않는다. Kotlin Android Studio onBackPressed () Deprecated, What is the Alternative? If you have updated any of your application to API LEVEL 33, you have seen this error, onBackPressed is deprecated. menu_fragment was empty when I added a fragment, the onBackPressed function uses remove method instead of replace or other. But you need to 'Pop The Backstack' once, to make the Android Device show the fragment you added to its backstack. Dec 19, 2019 · The user create and add some Fragments to the Activity identified by a tag. then check value of previousFragment inside onBackPressed method , if null perform exit operation else replace fragment with previousFragment by which you will get back to previous fragment on back press. Jul 23, 2025 · There is one method of implementing onBackPressed () method to call the interface method which are implemented in the fragment using onBackPressed () method of the activity containing fragment layout. How could I disable the back button? This is my sample code: public class Login extends Jul 15, 2025 · The above layout looks like this: Layout Output Step 3: Working with MainActivity. Activity ‘s onBackPressed() from a deeply-nested class because that’s how inheritance work. Mar 19, 2016 · Fragment可以说是在Android开发必需要使用到技术，项目中的界面基本上都是使用Fragment来实现，而Activity只是作为Fragment的载体，但有些特殊情况下Fragment也不得不处理Back键，如果是Activity的话还好说，直接覆盖 Activity的 onBackPressed 即可，但Fragment可就没有这么幸运了 . Otherwise, don't exit. Do I have to make another Java class or use MainActivity. Feb 20, 2024 · I am a little stuck in the implementation of onBackPressedDispatcher?. ,1) because FragmentManager#getFragments () returns the fragments in order as they were added, first fragment will handle onBackPressed () — the last fragment should Jun 12, 2024 · 1 There are fews ways to close the activity at onBack pressed, as you are more related to fragment. All of this shouldn't happen because I had overridden the onBackPressed function to only put in logs. It has great implications on the activity lifecycle of the application. Dec 26, 2024 · asked Jul 2, 2024 at 8:04 kotlin android-jetpack-compose onbackpressed jetpack-compose-modalbottomsheet asked May 18, 2024 at 7:43 java android android-fragments activity-lifecycle onbackpressed asked May 8, 2024 at 9:44 android navigation onbackpressed fragment-backstack asked Mar 19, 2024 at 9:10 Jul 19, 2013 · I want to disable the back button in a fragment class. My current onBackPressed method looks something like this: The problem seems to be the remove function which onBackPressed function is using. O and apply your own logic of handling backpressed in your 3 days ago · Finally, super. Sep 1, 2010 · Activity onBackPressed function wont be called when dialog fragment is stacked over it. Starting from Android 13, Google has deprecated the onBackPressed() functions. ly/YCNewsletter102Join my Commu Jul 23, 2025 · What is onBackPressed () in Android? This is an override function called when the user presses the back button on an Android device. I have got multiple Fragments, the first one the user gets to see after login is considered as 'WelcomeFragment' and the rest does not matter. 0 and higher. i want handle back key press event how can i do this on Fragment 4?after clicking back key in Fragment 4 i want to go back Fragment 1. popBackStackImmediate () or getSupportFragmentManager (). onBackPressedDispatcher comes … Issue In my app, I have a TopActionBar fragment that is loaded on the MainActivity that loads a MaterialToolbar, along with my navigation drawer. Jul 17, 2015 · I have main activity and 2 fragments on it, fragment1 call fragment2 When I am clicking the back button from the built in android buttons it call the onBackPressed function that I overrided in the Aug 15, 2022 · For FlutterFragment, I think the current implementation is not an out-of-the-box framework fix. supportFragmentManager . Oct 28, 2025 · This guide describes how to add a Flutter Fragment to an existing Android app. What I want is that Feb 22, 2023 · The implementation is straightforward, after performing the action we just delegate to onBackPressed() -> onBackPressedDispatcher. onBackPressed() doesn't seem to work in this fragment. However when I press the back button it closes the application which is obvious with fragment setup. Other use cases for child fragments are the following: Screen slides, using a ViewPager2 in a parent fragment to manage a series of child fragment views. kt Yes. I want to pop up a dialog for the logout procedure Mar 6, 2018 · Activities navigate to Activities via onBackPressed(). supportFragmentManager. Activity. Oct 14, 2023 · Photo by Xan White on Unsplash As we know, with every release, Android deprecates some APIs and introduces new ones to replace the old ones. May 12, 2022 · Handling OnBackPressed () in Fragments Use the OnBackPressedDispatcher to register the OnBackPressedCallback. Jan 3, 2024 · ComponentActivity, the base class for FragmentActivity and AppCompatActivity, lets you control the behavior of the Back button by using its OnBackPressedDispatcher, which you can retrieve by calling getOnBackPressedDispatcher(). onBackPressed(). Jan 30, 2018 · Back button touched again, this time I can see it in the log but it goes back to the previous fragment. So, you cannot override it in your DashboardFragment. When the onBackPressed is called, check if the instance of the current fragment is the instance showing the webview . But as Android evolved, everything is getting lifecyle … Jun 15, 2022 · For fragments using Jetpack navigation you can create an extension function, which will handle both the back and up press events. Why onBackPressed is deprecated Feb 21, 2021 · Now in that current activity you'll need to remove that fragment from your stack so you can check if there's any other fragments in the stack then you can simply pop your current fragment or else you can execute the activity's onBackpressed itself. 이제 차례차례 어떻게 제어할 수 있는지에 Sep 11, 2022 · Starting with Android 13 (API Level 33), the onBackPressed() function has been marked as deprecated. if it is not, call the super or whatever you need. Oct 1, 2018 · I have a three Fragments in a single activity, the FragmentTransaction for Fragment A to Fragments B, Fragment B to Fragment C is working fine, but on onBackPressed() it will flow like Fragme Oct 2, 2023 · OnBackPressed Deprecated So What to Use If you have updated any application to targetSdk 33, you probably have seen that OnBackPressed () is deprecated in Activities. When I replace a fragment (using a function I have defined in a utils. 0 I using BottomNavigationView with 3 main Fragment, like Fragment [A], [B], [C]. Only override it in that one Activity with Override the onBackPressed () method as per the example by codeMagic, and remove the call to super. So, How to refresh the Account Fragment after onbackpressed from activity ? May 7, 2025 · I have a few fragments in one activity. Fragments have to reside in an Activity (They are basically sub-Activities), so it doesn't make sense to navigate from a Fragment to an Activity via super. As you can see above, the DetailTopAppBar contains the IconButton composable function that invokes the onBack lambda. That said, we can now simply call the showAppClosingDialog() function and the code will behave exactly the same. If I'm correct, you might have to track if the first Fragment is reached and then finish the Activity. Flutter provides a FlutterFragment so that developers can present a Flutter experience Jul 10, 2017 · I am Android beginner, I am developing an app in which I have used multiple fragments through an activity. 0-alpha05 to guarantee that APIs (such as Fragments and the Navigation Component) already using OnBackPressedDispatcher APIs function flawlessly with the predictive back gesture. onBackPressed() が実行されなくなります。 解決方法はいくつもあると思いますが期待している挙動がActivityの終了である場合にはFragment側のonBackPressedで以下のように書けばActivityが Jul 4, 2021 · The fragment itself does not have a return button, but instead you can put this code in the onBackPressed () method in the activity to which the fragment is attached, and with the getSupportFragmentManager () method you can control the examples of running fragments or delete and return do. onBackPressed() in the fragment I have an Activity and Fragment within I have a flow in the Fragment -&gt; when a user clicks b Dec 3, 2019 · The documentation is very clear on how to add this custom behavior in fragments, and works quite well. Mar 27, 2011 · Is there a way in which we can implement onBackPressed () in Android Fragment similar to the way in which we implement in Android Activity? As the Fragment lifecycle do not have onBackPressed (). Jan 24, 2020 · Account is a fragment and when I click on the update Button I go to the UpdateProfile activity. I am in Fragment-A and it will turn to the Fragment-B when I click the button. Find all the videos of the Android App Development Course in this play Jun 20, 2011 · 0 implementing onBackPressed () by System time, if pressed twice within 2 sec, then will exit public class MainActivity extends AppCompatActivity { private long backPressedTime; // for back button timing less than 2 sec private Toast backToast; // to hold message of exit @Override public void onBackPressed() { Provides reference documentation for the Activity class in Android development, detailing its methods, lifecycle, and usage within applications. java file Now comes the main part of the app. Let's go back to the point. Jul 10, 2019 · my app having only two base activity and several fragment,, i want to display an Exit alert when user reach particular base fragment by clicking back press override fun onBackPressed () { if ( Provides an API reference for OnBackPressedCallback in Android development. kt file), I am tracking the fragments that are loaded for the first time and adding Sep 9, 2023 · Google is introducing support for predictive back gesture (aka ahead of time back pressed callbacks) and onBackPressed() got deprecated. @Override public void onBackPressed() { super. May 18, 2021 · Implement this code in onBackpressed () function of parent activity override fun onBackPressed() { this. I tried to define the data forwarding Sep 12, 2021 · What's the alternative for super. 6. For the moment they stay onBac Sep 1, 2010 · Activity onBackPressed function wont be called when dialog fragment is stacked over it. You can refer this question on S. 4k次，点赞11次，收藏14次。本文介绍了如何在Android10及以上版本中使用AndroidXAPI实现滑动手势返回功能，包括添加依赖、配置AndroidManifest. popBackStack() } primaryNavigationFragment provide the instance of the fragment currently displayed on the screen, and from there, we can pop back Stack this. On the other hand when you are opening the secondary fragment (fragment in fragment) which is defined as "DetailedPizza" in my code it will return the previous state of primary fragment. This answer provides the new approach introduced with Android 13 (SDK 33). onBackPressed(); } } I have put a condition in onBackPressed() cause you do not want to completely disable the Back button. Breaking it down into simple steps, we provided a solution that leverages the existing functionality of the Activity. onBackPressed() -> android. Android onBackPressed () in a Fragment I have a fragment where I have to implement the onBackPressed () method but it does not work I have 3 methods: onCreate: onCreateView (): onActivityResult () - Here I go to the PayPal activity I want to Oct 2, 2023 · OnBackPressed Deprecated So What to Use If you have updated any application to targetSdk 33, you probably have seen that OnBackPressed () is deprecated in Activities.