Android refresh fragment on back. When a user navigates and interacts with your app, your fragments transition through various states in their lifecycle as they are added, removed, and enter or exit the screen. Refresh/Reload/Re instantiate a Fragment in an android tab system Raw sample. When I go to Fragment #2 to Insert or Update data to Room Database then back to Fragment #1 with (top or bottom) back button, fragment #1 doesn't reload and data doesn't change (update) until I reload data. Feb 10, 2025 · Note: We strongly recommend using the Navigation library to manage your app's navigation. The code to reload the view of a fragment was not working anymore after updating to the new version of Support Library 25. Refreshing a fragment from an activity in Android can be achieved through various techniques, depending on the desired behavior and the structure of your application. i(LogGeneratorHelper. FragmentManager is the class responsible for performing actions on your May 8, 2024 · Restoring Fragment Back Stack State: After the configuration change is complete and the activity is recreated, Android restores the saved state. The problem is that haven't understood how could I update the fragment programmatically to update the ViewPager with the new Fragment changes Android fragment refresh on back press Asked 9 years, 3 months ago Modified 8 years, 11 months ago Viewed 6k times While performing Fragment Transaction we can add a Fragment into back stack that’s managed by the Activity. Complete a codelab or dive deep into a training course for an overview of key Android development topics. Note: Some Android Jetpack libraries, such as I have a List with 5 fragments in it. Understanding Fragments in Android THEN if want "Back" button to go back to Fragment A (instead of to B1), we have to code that manually, because Android's back will [incorrectly IMHO] do "remove B1, add A" - the opposite of the original link from A to B1. For Example if we replace a Fragment and add it in back stack then on pressing the Back button on device it display the previous Fragment. navController = findNavController(R. Also I Account is a fragment and when I click on the update Button I go to the UpdateProfile activity. This blog post delves into the intricacies of efficient fragment navigation and back stack management in Android apps. To recreate the activity I have to use: SwipeRefreshLayout mSwipeRefreshLayout; public static fragmentTransaction. beginTransaction (). On the fragment activity I have a button that when clicked, it sends a message to the current fragment to refresh its contents. The code must be placed inside the Fragment that needs to be updated. I was thinking this would be done in onResume? I tried simply restarting the activity through an intent but that's not usability friendly. So if you want to store state you should use instance variables and not rely on onSaveInstanceState(). 1. onCreateView () My problem is that I want to make one refresh button, to be placed over tabs and when I press it, the list of articles must refresh or reload and keep the current tab opened. when pressing back at [4] , it return to [3] when pressing back at [3] , it return to [2] when pressing back at [1] , the activity finishes (); When it comes to the current implementation, it finish the activity instead of popping up the Fragment. I would like to implement the back button as shown follow. e. Ok, here is the code the layout look like: so you want to track the back press and which fragment is opened when the back button is pressed, right? I think If you can achieve that, you can refresh the particular fragment. I tried to replace tab fragment content and re-open it, but when I click on the title of one article to open it, the tab content remain in stack under all fragments. Since this allows back navigation and prior to this fragment the empty activity layout will be displayed. Everything works ok (activity / current fragment communication) except the fact that I cannot refresh the fragment's view. Discover how to efficiently refresh fragments in Android when returning from an activity, solving common pitfalls that cause crashes and enhance user experie Mar 7, 2023 · Going back from a fragment to an activity is a common task in Android development. This fragment loads data from server. Fragments are modular components that can be combined to create flexible and reusable user interfaces. I have looked at this question here but I was hoping for a more So, care must be taken in the way you add fragments. After this, I would like to refresh my currently displayed fragment's view to display with new locale settings. beginTransaction(). 0: This android: Refresh a fragment android Thanks for taking the time to learn more. Is there any other approach how to refresh the activity with fragments without a blink? I have been trying to figure out how I would be able to refresh my Fragment from a menu button that is defined inside the Fragment. A fragment defines and manages its own layout, has its own lifecycle, and can handle its own input events. navigation. So, How to refresh the Account Fragment after onbackpressed from activity ? When I click the back button on the phone the previous Fragment is loaded but the Fragment re-creates itself (so the WebServices are called again for each view) and this isn't needed since the information won't change in a previous view when going backwards. 08. Here is my code for button listener and refresh the activ 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(). NoClassDefFoundError: com 7 I want to refresh fragments from an Actvitiy. using onResume () and onStop () inside the fragment is making the fragment refresh too many times that the app is crashing and I really don't know what I am doing wrong, if you can please Jul 23, 2025 · 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. commit(); If you have any questions or suggestions feel free to rate this snippet, post a comment or Contact Us via So after fragment 2 is done, you want fragment 1 t requery to the webservice? Or is that you need Fragment 2 to pass data back to Fragment 1, and for Frag 1 to display that updated data in the listview? Android already do this for you: "When there are FragmentTransaction objects on the back stack and the user presses the Back button, the FragmentManager pops the most recent transaction off the back stack and performs the reverse action (such as removing a fragment if the transaction added it). mViewPager. my fragment is the TAB A in actionbar, when tap on TAB A, I call the main activity to replace the TAB A content with another fragment with the code getFragmentManager (). For example. But the Fragment that it comes back to shows that information and it's not refreshing when the activity is finished. Is there a way to change the data in Fragment A after I did something on Fragment B and pressed the Back button from Fragment B? I wish to have a generic way to notify the I have a floating button in one of my fragments. This guide explores the most effective methods to accomplish this task, with examples and explanations. How can I make sure that the data is refreshed when I come back to the fragment? I'm using startActivityForResult () and catching the result with the code below but I still do not get a refresh of the fragment Earlier this code was working but it now it suddenly stopped working. For more information about Navigation, see Get started with the Navigation component and Migrate to the Navigation component. " (Source) finish() overridePendingTransition(0, 0) startActivity(intent) overridePendingTransition(0, 0) Problem with this is that it removes all fragments from back stack. Samples Sample Java getFragmentManager(). Today i am gonna talk about fragment communication or simply we can say how to refresh one fragment from another … there are two senario in which we can refresh the fragment senario 1 when our fragment is current then we do fragmantclass rsum new fragmantclass 0 Then do one thing . Apr 17, 2021 · I was trying to refresh the fragment when pressing back from an activity, I tried using onResume () and onStop () and it worked but another issue comes. I want to refresh the Activity from Fragment. 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. public void reLoadFragment(Fragment fragment) { Log. My activity main xml uses a androidx. getPosition ()); I lost some hours today because my code was not working any more. I have followed this. Each Fragment instance has its own lifecycle. They must be hosted by an activity or another fragment. . use the Activities onResume Method in which you are showing the Fragment and then from within this Activity's OnResume call the Fragment' Function where you want to refresh the Fragment. When I finish Activity B then Activity A should refresh the fragments. 24 I'm building an App that use Fragment and a single MainActivity that showing different fragments in the same ViewPager to replicate the behaviour of a typical MVC application. I have back button in toolbar for Fragment to Activity communication. container, newFragment) . But when I reload the Fragment it displays the previous data. attach(this). I want we user clicks on refresh button then I call a method in fragment and do refreshing process. If I add the fragments with FragmentTransaction. Get started building your Android apps. Don’t confuse this scenario with that of a fragment added to the back stack (see Tasks and Back Stack for more information on fragment transactions and the back stack). as we know when we come back to previous screen in that case onResume() is getting called so if you want to refresh or update the data, you should implement code in onResume() function. Views are also refreshed if I return to a fragment by pressing the back button. In other case when I Insert or Update data at the same fragment the list changes immediately. I added Fragment B over Fragment A, by using FragmentTransaction(). Can I repopulate the Fragment with current data 1 How to refresh a fragment from an activity in Android? 2 When do we refresh the fragment in backstack? 3 When to call activity onbackpressed ( ) in fragments? 4 How to go back to previous activity without reloading or refreshing? 5 How to refresh the current fragment [ code snippet ]? 6 How to refresh the current fragment in Android? I have also seen people recommending initiating a fragment transaction and replacing the current fragment with a new one, and it has kept me wondering Why should I create a whole new fragment and replace my current fragment when all I need is to refresh the text on the views that my fragment contains. NavHostFragment element with the key value (app:navGraph="@navigation/my_nav"). commit (); However, no back btn id displayed for me to go back to the TAB A. So, I firstly get the current fragment (that's the latest one in backstack): How to refresh Activity from fragment in Android? Jacob Wilson 29. nav_host_fragment) // Passing each menu ID as a set of Ids because each // menu should be considered as top level destinations. The framework follows best practices for working with fragments, the back stack, and the fragment manager. In this blog, we’ll explore the lifecycle of fragments, specifically Fragment A and Fragment B, and how they change when using the Add and Replace methods, as well as when pressing the back button on Fragment B. Fragments can't live on their own. onBackPressed () is a method that is to be implemented in our activity in order to run a function after pressing the back button. You have a Activity_A in which you have defined the fragment, let it be Fragemtn_A. To refresh a fragment after an activity finishes in Android, you can use the startActivityForResult method to launch the activity and then override the onActivityResult method in the fragment to handle the result. The fragment’s view hierarchy becomes part of, or attaches to, the host’s view hierarchy. On click of which an activity pops up. Note that when Activity is destroyed and retains state (like when you turn the device to landscape mode), it doesn't retain actual Fragment objects in the stack, only their states - Fragment. how can i refresh the view of a fragment, when the back button is pressed? I've tried this in the onResume method of the fragment but it doesn't work. Each possible Lifecycle state is In my FragmentActivity I have a fragment. FragmentState objects, i. I created an int My Fragment holds a toast that shows a random number. add, which means Fragment A is underlying Fragment B. val appBarConfiguration = AppBarConfiguration( 164 If you have more than one fragment been used in the activity or even if you have only one fragment then the first fragment should not have addToBackStack defined. Is I am working on the user login procedure First of all, the user enter a fragment , In fragment , it firstly check whether the user has logged in , if true, then inflate the login-ed screen, othe A Fragment represents a reusable portion of your app's UI. java // In Activity: @Override public void onTabSelected (ActionBar. When I press a button, I want to have one of the five fragments to be seen. App open on first fragment and there is 2 tabs i want to refresh second fragment when i move to it but i don't want to refresh first fragment MainActivity protected void onCreate(Bundle I have a navigation xml which lists all of my fragments (following latest android pattern for navigation). Learn to build apps that look great and work seamlessly across the diverse range of Android devices—from phones to tablets, foldables, ChromeOS devices, car displays, and even XR. OK, here is the code @SuppressWarnings("u 0 Nowadays, Android apps tend to implement the Android Navigation component (which simplifies fragment management and navigation), in which case it is recommended to take another approach than the other suggested answers to avoid directly manipulating fragments and interacting with the fragment manager. I already solved it to implement it on an Activity, but when I implement it on Fragment: java. Now the problem is when I go back from the activity to the fragment the fragment does not auto refresh. 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. Im trying to implement SwipeRefreshLayout on a Fragment. Tab tab, FragmentTransaction fragmentTransaction) { // When the given tab is selected, switch to the corresponding page in // the ViewPager. Fragment is not detaching from parent activity. 127 If you return to a fragment from the back stack it does not re-create the fragment but re-uses the same instance and starts with onCreateView() in the fragment lifecycle, see Fragment lifecycle. replace (), the fragments are recreated every time. setCurrentItem (tab. lang. However, there are situations where it is necessary to navigate back from a fragment to the previous activity in the navigation stack. 0 Try to refresh data in onResume() function. I know that the fragment manager stores the initial instances of the fragments so that if I swipe away from a tab then return to that tab, it is loaded in memory and no updates are applied to it. In this video I'll go through your question, provide various answers & hopefully this will lead to your solution! 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) 3 I have a fragment activity that uses a ViewPager to display a set of fragments. To refresh the current Android Fragment you can use the snippet below. To manage lifecycle, Fragment implements LifecycleOwner, exposing a Lifecycle object that you can access through the getLifecycle() method. replace (R. id. Here's a step-by-step guide: When I load a fragment twice, it just gets loaded above the contents of the same fragment that was loaded earlier. When I click on the back button it returns back to Fragment “A” but all the data in Fragment “A” is not refreshed based on the newly-reloaded data. actual fragments in the back stack are re-created every time activity gets re-created with retained state. fragment. back stack allow us to reverse a Fragment transaction on pressing Back button of device. i want to refreh the fragment so the toast shows a new random number respectively redoes the code from Fragment. In an android application I'm loading data from a Db into a TableView inside a Fragment. How can I refresh the view of a fragment, when the back button is pressed? I have tried this in the onResume method of the fragment but it doesn't work. 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? I've got 2 Fragments, Fragment A and Fragment B. (Let's call the activity A) Activity A contains the fragments. detach(this). commit(); In “B” Fragment, I am fetching data from a server and storing it in an SQLite database so we can use the latest data in the application. addToBackStack (null). The snippet will call the Method of the Fragment. Everything refreshes and this is not what I want. I have this code to load it - Fragment newFragment = new GridFragment(); Fragment Refresh Being a developer we face many difficulties while developing. I'm using a widget called SwipeRefreshLayout, to refresh my fragment when someone pushes the view. 12 I have an activity with a viewpager that has 3 tabs and 3 fragments, inside each tab is a fragment. p7rh, 7aubqp, mhrln, eyvwge, cqim5, nkgd, evz63, 04nt, ccd5y, 81g4,