Android fragment reuse. 1st Fragment contain a ListView of Games .
Android fragment reuse Oct 23, 2011 · This SO question deals with the memory leak caused by saving the View instance returned by a fragment, allowing the onCreateView of a fragment to return the same View under certain circumstances. I have two questions on this below. Instead add a tag to the fragment when creating them. When the activity is paused, all the fragments available in the acivity will also be stopped. 0. I have been playing with DialogFragment but I cannot find a way to reuse it inside one. Whenever ViewPagerAdapter. Think of a Fragment as a reusable portion of a user interface that can be combined with other fragments to create a multi-pane UI or to reuse UI elements across different activities. Jul 11, 2024 · What are Fragments? In Android, a fragment is a reusable portion of your app's user interface. You can declare Reading the documentation, there is a way to pop the back stack based on either the transaction name or the id provided by commit. Aug 18, 2011 · Is it possible to reuse a fragment twice in one layout? I have a layout of two tabs, Tab A and Tab B. Either have viewless Fragments send data to that Fragment to update the View or build the View with the parameters. (Please note that all the fragments are created and added dynamically). Adding super. 2nd Fragment contain a ListView of Cartoons. Write the Fragment code once, and reuse the Fragment in more than one Activity without having to repeat code. Integrate a mini-UI within the Activity. The only I Nov 13, 2018 · I want to reuse this Fragment, so the OnClickListener isn't hard coded but defined by the activity which calls this Fragment. The :feature_login navigation graph kinda looks like this: The thing is that I need to reuse many of these Fragments across different parts of the App, more specifically, these Fragments Jan 30, 2017 · Since Android will create a new instantiation of your Fragment whenever you reuse it, there should be no risk of clashing with an existing Fragment (as long as you don't use static variables that are shared between them). your_container)). Jul 29, 2015 · onResume() will be called when your Activity onResume() is called, you don't have to call onResume() in a Fragment. Sep 10, 2013 · If you create your fragments like . Oct 13, 2016 · I have a viewpager that pages through fragments. Activities: Why Fragments are More Efficient in Android Development In Android development, choosing between fragments and activities can significantly impact the performance, user Overview. Jan 12, 2020 · It might not be what you ask, but I faced the problem o re-usability of code in a fragment that I needed in different navigation graphs. Each fragment should be designed as a modular and reusable activity component because each fragment defines: its own layout Nov 17, 2023 · Android fragments are independent components that can be combined to create flexible and scalable user interfaces. Android - How to avoid a fragment be recreated when press back button. So, firstly I would suggest using BottomNavigationView in conjunction with a ViewPager and creating independent Fragments for every navigation item. The conclusion there is that the saved View will hold the Activity (via Context), never allowing it to release - resulting in a memory leak. You can think of a fragment as a mini-activity within an activity. One such area that will be explored in this chapter involves using Fragments. Benefits of using fragments in Android development. Of course you can. Jan 26, 2016 · The fragment is being added at the activity after a button click and the views inside this fragment changes depending on the button that was clicked. Once the process is killed, you app no longer exists on Android main thread, hence a new instance of the activity has to be launched. Jun 26, 2019 · Usually you simply remove the fragment from it. Apr 5, 2017 · A long time i used this code, to 'reuse' a GoogleMap in Fragment - when switching to another Fragment and opening the MapFragment again, the Map and all its content was as before (no zooming-in aga Mar 14, 2016 · While reusing fragment it should meet certain criteria, that its follows the same context, what I mean is appearance would be same but depending on data provided to the Fragment it's UI and information displayed would change, May 27, 2014 · Reuse the existing fragment created by ViewPager – Sagar Waghmare. I succeed to show the fragment with the default option of the BottomNavigationView, but I can't select the other options. onCreateView() method is called. My ViewPager contains two Fragments. The LinearLayoutManager orientation is Vertical. Fragment myFragment = new Fragment(url,position); After you stop your activity and open some other applications, you loose your vars which you set on constructor of your custom fragment. From the Android Documentation : "A Fragment represents a behavior or a portion of user interface in an Activity. My application supports both phone and 10" Tablet. In one spot only does the Nov 2, 2012 · You're better off keeping the view contained within the Fragment so the Fragment itself handles it appropriately. Jul 16, 2017 · I wouldn't keep the fragment instances globally. I reuse fragments but i had to add an "updateArguments" method to the fragment that applies whatever changes the new arguments imply edit: i should also say that i'm using SimpleStack instead of the built in backstack / navigation components Jun 26, 2018 · Given N fragments representing different UI of the same entity. Aug 29, 2014 · I have been searching from past few days on how can i reuse the same fragment across multiple tabs, but to no use. commit(); Jan 3, 2024 · To reuse fragments, build them as completely self-contained components that define their own layout and behavior. getSupportFragmentManager() . beginTransaction(); // Replace whatever is in the fragment_container view with this fragment Mar 6, 2014 · Was trying to reuse a complex DialogFragment as a Fragment in an activity layout. Meaning the getGPS() method can be called from the BaseActivity in onCreate(), preventing a lot of code duplication. Fragment on the other hand cleanly solve this problem. However, each time I switch, the fragment is completely recreated. What I am trying to accomplish is to only have 1 instance of each Fragment and reuse that. support. Like activities, fragments have their own lifecycle, meaning they go through stages such as creation, starting, pausing, stopping, and destroying. Aug 28, 2018 · You need to use addToBackStack() to remeber the fragment transaction like below:-FragmentA fragmentA = new FragmentA(); getFragmentManager(). The constructor is not usable and I need to restore the listeners when android recreate the fragment. Android devices exist in a variety of screen sizes and densities. The fragment’s view hierarchy becomes part of, or attaches to, the host’s view hierarchy. In android, the fragment will act as a sub-activity and we can reuse it in multiple activities. Subclasses are for example, ListFragment, DialogFragment, PreferenceFragment or WebViewFragment. Each fragment should have the same navigation flow. Nov 6, 2014 · I assume these classes are the ones by the same name from gitHub that pop up at the top of a google search. I have integrated bottom navigation and coupled it with the android navigation component. v4. change of state would need component to act on their widgets which would consume processing power. YOUR_CONTENT,fragmentA,"YOUR_TARGET_FRAGMENT_TAG") . Inheriting this kind of functionality in a base activity class makes more sense, because the OP indicated it will be used throughout the entire app. I'm adding fragmentTransaction. inflate. I want to share some layouts between the fragments: toolbar, scrollbar, app bar. Basically this is how I do things (left some of the code out for simplicity). A single DialogFragment for multiple dialogs? 11. This is a question of time vs. if you code it that way. From the above example I need to reuse the first element i. Oct 28, 2013 · I have recently started using fragments have created a demo app which looks like this: Clicking on each button switches between fragment 1, Fragment 2, and Fragment 3. However, the ones that are added to the fragment manager now are NOT the ones you have in your fragments list in your Activity. In Phone I use the fragment to display it as a normal screen using Activity In Tab I need to display the same view as a dialog. Let's say from Settings fragment, Main Activity and Navigation drawer (fragment). This means when you press back button the fragment that got replaced will be created with its onCreateView being invoked. Fragment is sort of like a “sub Activity” that you can reuse in different activities. Jan 25, 2020 · I am currently learning the one activity + multiple fragments approach, which is recommended by Google. This is a matter of style, but I generally have Activities manage Fragments, and Fragments manage Views. Nov 26, 2019 · The fragment that you want to use in multiple navigation graphs should have the same id in each navigation graph. If this is true, then the fragment could be a thin wrapper around a bitmap, and bitmap itself could be cached instead of a fragment. FragmentStatePagerAdapter destroys the items in the memory but keeps their state, so the next time when the fragment is inflated, it can restore back to the state. I am using the code below, but it always seems to create a new instance of the common fragment in each of the main fragments. Now if I return my saved member Variable (ViewA) then an exception is thrown saying 'The specified child already has a parent. 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. i mean you can. When i realized this situation i tried bundle approach. getItem() is called, get a fragment instance from the pool and import android. state?. id. The flow would be like: characterListFragment -> characterDetailFragmentA -> episodeFragment -> characterDetailFragmentB Mar 11, 2014 · For example: fragment with listView and on Item selected load another fragment in the same frame. "Find" will consist of two recyclerviews. Jan 3, 2022 · I'm working on a feature that requires me to keep the fragment (all of user's interactions saved in the same order) when the user decides to exit the activity to browse the app but with an option to go back to the same activity/fragment (without any change to the UI or interactions), the catch is it's an external SDK and I don't have access to Apr 27, 2016 · I have fragment "Incoming" on one slide of a viewpager. Fragment class or one of its subclasses. May 28, 2014 · No, You can't reuse a Fragment once the process is killed. os. kt private val vm by navGraphViewModels<VM>(R. Using the support library, fragments are supported back to all relevant Android versions. Bundle; import android. Nov 11, 2017 · As per your code in the question, you are just showing/hiding the views present in the layout. You can combine multiple fragments in a single activity to build a multi-pane UI and reuse a fragment in multiple activities. As you progress through the chapters of this book, it will become increasingly evident that many of the design concepts behind the Android system were conceived to promote the reuse of and interaction between the different elements that make up an application. Dec 27, 2017 · Hello I was stuck with multiple fragment store and reuse. news_articles); // Check that the activity is using the layout version with // the fragment Feb 24, 2018 · I happen to be working on a project with a BottomNavigationView and Fragments as well at the moment. I have a second fragment "Find" on the next slide of the said viewpager. remove(getFragmentManager(). In the onAttached() of your Fragment, cast the Activity to your new interface and store it in a variable private FragmentCallback callback;. Dec 7, 2024 · Fragments in Compose. app. public void TestFragment extends Fragment { Nov 29, 2018 · How to reuse fragment's view in Android? 18. Activities can combine multiple fragments to build a multi-pane UI on tablets and reuse fragments across activities on handsets. Your app starts with an your main activity as in Manifest file, and loads corresponding views and fragments. These two characteristics of Fragment let you: Reuse a Fragment. onSaveInstanceState(out); Nov 15, 2017 · In the other, fragment you can just include the layout of the item. Is there a FragmentPagerAdapter equivalent to the convertView in the listAdapter that will enable me to reuse fragments that have already been created? My code is below. However at the end i managed to get thru it and now its running correctly. onResume(); //OnResume Fragment } This issue can be easily fixed if instead of trying to make a Fragment look like a DialogFragment I would look from the opposite angle: make a DialogFragment look like a Fragment - after all, a DialogFragment is a Fragment! One more important difference between add and replace is this:. I want to m Apr 13, 2021 · Using the same layout with the same fragment and same VM? And handle all the texts logic in the VM; Use the same layout but with different fragment and different VM? For me, if the screens are 100% the same but the only thing that changes are the texts i would go with the first option but im not sure thats the correct way to do it. So what I get is the first Fragment added multiple times without getting its content for the actual id. , activity_my. e, A when user clicks on the fourth time. My ViewModel contains a report, which is a complex object I cannot serialize. Will i be able to reuse the fragment for showing a Jun 18, 2014 · here is code : public class Fragment1Nasdaq extends Fragment implements LoaderCallbacks<Cursor> { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bun Jan 19, 2016 · public class GroupMemberFragment extends Fragment { RecyclerView mRecyclerView; ArrayList<Group> mGRoups; @Override public void onCreate(Bundle savedInstanceState) { super. Do so by inflating an XML containing a FragmentContainerView as the holder for your Fragment. for next page key = 1. Each navigation file looks typically like this: Mar 23, 2012 · Now if you wanted to reuse your custom UI component in different activities you would be repeating the code for Activity. Apr 18, 2017 · How Many Time your fragment got recreated?The 12 ViewHolder count may be from new Fragment being recreated when you swipe with FragmentStatePagerAdapter resulting in recreation of RecyclerView, RecyclerAdapter and ViewHolders. This newinstance method doesn't make any sense, since you simply create a new fragment every time. If you want to do it from your Fragment you should do something like this @Override public void onResume(){ super. This will create, retain, and destroy (when necessary) the fragment instances. Nov 5, 2015 · 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. findFragmentById(R. When I click on a navigation bar's item, it's replacing the current fragment by another one which correspond the fragment I wanted for this item. Jan 6, 2025 · In Android, the fragment is the part of the Activity that represents a portion of the User Interface(UI) on the screen. 3rd Fragment contain a ListView of Test (ListView contain Only Title of Test). On the getItem method of the adapter I detect if the user has gone to the previous page or the next page. How to structure the code in effective way? Jul 22, 2011 · Now I push another fragment (say FragB) on top of it and after some work press the back button. DialogFragments take care of removing themselves with the fragment manager when they are dismissed. Just create an interface for the Fragment, let's say FragmentCallback, with your desired callback method, onButtonClick() for instance. Of course you can reuse fragments in future activities which solve another tasks. Similarly your fragment can contribute items to your options menu, something traditionally only an Activity could do. For example : [A,B,C,A,D] Now I need to check if a fragment exits in the stack I need to reuse it. Jan 29, 2018 · At the top, there is the player (fragment) and below is the content info (viewpager with fragments), and user can swipe between pages (ViewPager) to switch between contents. of(this), you actually create/retain a ViewModelStore which is bound to this, so different Activities have different ViewModelStore and each ViewModelStore creates a different instance of a ViewModel using a given factory, so you can not have the same instance of a ViewModel in different ViewModelStores. Apr 26, 2018 · I'm writing an Android application with ViewPager. Apr 6, 2012 · It's not its parent Activity! It's a very different Activity. Aug 14, 2015 · I want to sure that you re-use profile fragment by only one instance and just change the data shown when re-use, if it is, you should have a variable to record your previous shown data and update data when click back. To create a fragment, subclass Fragment and move code from activities into fragment lifecycle methods. ? May 23, 2018 · While this solution works (fragments are reused, not re-created), there's a problem with the navigation. The problem is, the objects in my fragment are all reset after replacing fragment. commit(); Dec 9, 2013 · Views are owned/controlled by Fragments now so I think it is better to have all logic related to them within the containing Fragment, as opposed to the Activity. Because of that I would like to store my data somewhere in the runtime. With that being said, the way to pass stuff to your Fragment so that they are available after a Fragment is recreated by Android is to pass a bundle to the setArguments method. Aug 12, 2023 · By following best practices such as decoupling fragments from their parent activities, using the FragmentManager for fragment transactions, considering different screen configurations, using arguments and the ViewModel architecture component for data sharing, and properly managing the lifecycle of fragments, developers can unlock the full I need to use an android navigation drawer with a different fragment for each navigation item, but my problem is: *How to keep the instances of the fragments and reuse them when the navigation ite Feb 17, 2016 · I want to make Android app less memory expensive And wonder is there a way to reuse one instance of a Fragment without recreating it? In my app I have a few fragments (which are memory expensive) and Extend by device; Build apps that give your users seamless experiences from phones to tablets, watches, headsets, and more. This section of the documentation provides an overview of the main idea, as well as a list of available qualifiers. Oct 31, 2014 · 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 Oct 17, 2014 · There are 2 fragments (a and b) added to a viewpager with a listview in each. May 15, 2014 · How to reuse fragment's view in Android? 0. But I get IllegalStateException exception as shown below. The following code shows an example implementation. memory consumption, as at least one of the fragments needs some time to get created. addToBackStack(null); but when I press the back button when I return to fragment with the listview it starts to create all the stuff in the onCreatView and that takes tame to load the images and text again. I don't think it can get more simple than that. If i select a cell in fragment(a) it pop a fragment(a1) on top of if. This approach will be clear and logical separation of tasks. This gets the fragment currently present in your_container I'm making an Android app for a School. Use the AndroidViewBinding composable to add a Fragment in Compose. This fragment contains a RecyclerView populated with custom-relative-layouts. What is th Jul 30, 2020 · In the fragment A, I load some data from a repository which came from a network or database. See this answer of mine where I linked some articles about the problems with BaseFragments. Apr 18, 2013 · I want to reuse the Fragment instance that retrieves and displays the common info. But what i want is to reuse the view of the fragment so that whenever a tab is selected system does not call . " Oct 31, 2024 · Although Android offers a variety of widgets to provide small and reusable interactive elements, you might also need to reuse larger components that require a special layout. I don't want to have to re-write this whole DialogFragment class as it is quite complex. //for currently displayed fragment key = 0 //for previous page key = -1. Fragments are standalone components that can contain views, events and logic. This view contains a list and a button. replace removes the existing fragment and adds a new fragment. My FragmentPagerAdapter subclass creates a new fragment in the getItem method which seems wasteful. I keep the previous index. If you have only one task in your application then I think you need only one activity and many fragments if needed. When I navigate to fragment B, the data in a fragment A is lost, so I have to load it back from a network or database which takes time. Add or remove a Fragment dynamically. Here is my custom FragmentPagerAdapter (I used google's sample) Jun 6, 2018 · I'm currently developing a Android studio App using fragment and a bottom navigation bar. The use of fragments brings several advantages, such as improved code organization, better code reuse, and the ability to create responsive A Fragment is a combination of an XML layout file and a java class much like an Activity. FragmentTransaction ft May 4, 2016 · So for a better understanding I create my Fragments with an createInstance() method and pass an id with which it gets content for a list from a database. They represent a portion of a user interface or behavior in an activity, Jul 11, 2024 · Reusability: You can reuse fragments in multiple activities, reducing redundancy and saving time. because every time you switch the fragments, lets say from a to b, a enters paused state and b enters resumed state. A Fragment typically defines a part of a user interface. This means you can reuse this fragment by calling the attach method, with a modified ViewHierarchy. Jan 30, 2012 · In the example on using fragments in the Android docs, when the application is in 'dualview' mode, the details fragment is recreated whenever the application needs to show details for a different title. onViewCreated(view, savedInstanceState) // Restore state vm. if x was outside, then no processing is Oct 24, 2024 · The option ID is used in the Java code to determine what to show in the fragment (this the same list of different items, the items depend of the selected option in the BottomNavigationView). Oct 25, 2012 · Both of you are right. This causes the FragA'a onCreateView to be called again. Whenever user chooses a menu item I replace the current fragment in the main container with the requested one but it recreates the fragment every-time, so i updated my code to reuse the existing fragments instead of creating them again and again as content Oct 4, 2019 · I'm trying to share a ViewModel between my activity and my fragment. Nov 29, 2022 · See this question for some answers about the reason why binding needs to be nullable in a fragment. If you fail to meet these conditions the Navigation Component won't generate the code at all and build fails. Using the name may be easier since it shouldn't require keeping track of a number that may change and reinforces the "unique back stack entry" logic. If I try to reuse the adapter (FragmentStateAdapter): Apr 18, 2016 · To define a new fragment you either extend the android. Read this to understand the Fragment Lifecycle. container, new PlaceholderFragment(), TAG_PLACEHOLDER) . You only can reuse a fragment of an existing fragment of the FragmentManager you want to do the transaction (of activity or fragment). How to re-use one Loader in two different fragments? It's just that I use a Fragment inside some Activity for the list and a MapActivity for the map, I thought that maybe it matters but I don't think so. Return to same Fragment on backPressed. – Mar 20, 2016 · I have created 3 instances of the fragment. If you have different instances of profile fragment,i don't know the way to help you without codes. Each child fragment can open another detail fragment (main fragment replaced with details fragment). As a side note. onCreate(savedInstanceState); setContentView(R. Check out the Adding a Fragment without UI section. Apr 8, 2024 · Fragment is a piece of an activity that enables a more modular activity design. The fragment class that needs to be reused should be declared as abstract: Jun 11, 2015 · Now whenever i select a tab, corresponding fragment gets recreated and its . My practice is, i try to identify items that repeat itself and i try to create general layouts, for example, layout with title and subtitle and the use this layout in RecyclerView or The fragment life cycle is closely related to the lifecycle of its host activity. You could double-check this in debugger. To efficiently reuse complete layouts, you can use the View, you can do it… Jun 22, 2021 · My issue is passing data between fragment works fine, however when I back to the previous fragment the data change to the latest object store in ShareViewModel. Loaded these fragments into a HashMap. call the appropriate callbacks, destroy view and then destroy the fragment; call the callbacks, destroy view, but keep the fragment itself alive Jul 4, 2012 · I have multiple fragment inside an activity. They extend dialogFragments. When I go back to from detail fragment, ViewPager2 recreate all child fragments. A fragment encapsulates functionality so that it is easier to reuse within activities and layouts. Init ViewModel by navGraphViewModels (Live on Navigation scope); Store any to-restore state in ViewModel // fragment. Aug 13, 2014 · If you want to reuse the fragment then simply expose a method to set the path in a variable. let { (recycler This fragment is used here and there (in layout files using <fragment/>) and now I want to display it as a dialog and allow the user to select a value from there. Lets say i do that in the two root fragements (a an b) with no internet connexion, it popup for each root fragment a fragment(a1 and b1) on top of them which contain the view "reload". Here is an example implementation: Fragment fragment; @Override protected void onCreate(Bundle savedInstanceState) { //. beginTransaction(). I've implemented this structure where you can have your BaseFragment layout appear in your ChildFragment layout. Aug 30, 2018 · (Especially considering modern android devices with high power CPU and RAM) But to answer your 'how to achieve' question You need a pool to manage the fragment instances. Apr 24, 2022 · I have main fragment with ViewPager2 that contains other fragments. I get the associated fragment and Not 100% sure, but I believe fragments get destroyed and re-created by view pager. addToBackStack("YOUR_SOURCE_FRAGMENT_TAG"). above Android API 29, flutter fragment will render above first fragment after the detail activity pop out of supporting both tablets and handsets, you can reuse your fragments in different layout configurations to optimize the user experience based on the available screen space. Also, in each graph, the same fragment should have the same fragment arguments and the same actions with same ids. replace(R. commit(); this will remove the fragment from the your_container holding it. In each fragment are located two receclerViews to show different LiveData lists of items from Database (I'm using Room) The code for BaseFragment Mar 28, 2014 · I'm working on an android application, that uses a navigation drawer to switch between two fragments. The fragments are displayed conditionally. AndroidViewBinding has fragment-specific handling such as removing the fragment when the composable leaves the composition. this is because it would be more efficient. How to generalize/abstract navigation flow out of fragments for further reuse using Navigation architecture component XML graph? May 6, 2014 · Fragments are useful because you can design one part of your layout, and reuse it somewhere else - think of GMail, on a tablet you have a list of your emails on the left and content on the right and on a smartphone you first pick an email and then go to a detail view with the contents. How can I Dec 8, 2015 · Fragments can be added or removed dynamically at runtime and their transactions can be added to a back stack. Basically, I've used ViewStub to implement the solution. This might be trivial, but I haven't found an answer after hours of searching. Source Comment Mar 16, 2012 · When you come back, Android will remember that you used to have Fragments A, B and C in the fragment manager and so it recreates them for you and then adds them. Using WebView in Fragment. I don't want to copy/paste the same method and the method is very specific, it should be exactly the same (because it registeres Firebase events). You can usually achieve the code reuse without the drawbacks of inheritance by using extension properties and functions. So, every time I click on a tab on bottom bar, the fragment is recreated and the old state is not persisted. The problem. The sense of the question would remain the same if I asked about two fragments. The Activity implements the needed interface for this and the Fragment gets a reference in its oncreate method. On a button click I am starting a new fragment, adding it to backstack. nav_graph) { vmFactory } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super. When i click on each button the respective fragment is loaded in the fragment display area. I add them to my FragmentPagerAdapter. Each menuitem in bottomnavigationview is considered primary - thus, when BACK is pressed, the app finishes (or goes to the top component). Mar 3, 2023 · Each of the :feature_modules has one Activity and many Fragments I have a navigation graph to navigate between fragments. replace() is used to swap out each old details fragment instance with a new one. Mar 22, 2023 · A Fragment represents a reusable portion of your app's UI. More details here: Mar 9, 2016 · Hi I am using a Stack variable for storing the sequence of fragments clicked by the user. You don't have to insist on using arguments, just create your own custom class that extends fragment. FragmentTransaction. 1st activity is of Student which contain a ViewPager consists of 3 Fragments. e replace fragment) so every time it call its onCreateView and all other method, I think this is a very big issue in this demo, as we click second time on tab1 it should only call its onResume method as happen in activity Mar 20, 2018 · When you call ViewModelProviders. Is this recommended practice? Jul 19, 2019 · As per the Fragments documentation, you should be using addToBackStack() along with your replace() operation to add your Fragment B to the back stack: // Create new fragment and transaction Fragment newFragment = new ExampleFragment(); FragmentTransaction transaction = getSupportFragmentManager(). When current fragment onCreateView called again, we return a cached view, without calling inflater. My schenario; I have 3 Tabs(without viewpager just fragment change) in one Activity and tabs having 2-4 Child fragments as like shown in below image. I either didnt get sufficient resource or couldnt understand the code. Jan 25, 2020 · But once used for the first time, such view must be detached from the Fragment container view to be reused (see onDismissed() overriden method on posted snippet), which seems like a nasty workaround. The base problem is that I need to pass custom objects to the fragment and the mechanisms I know are not enough. For example do something like. There are 2 possible ways to go when a Fragment stops being active. onCreate(savedInstanceState); } @Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater Apr 25, 2013 · Android Studio (API 23) - I want to reuse a fragment across multiple activities, but with a unique layout in each activity Hot Network Questions Can . Fragments must be embedded in activities; they cannot run independently of activities. When the Viewpager position changes, the player is updated accordingly and starts playing the current content. Fragments simplify the reuse of components in different layouts and their logic. beginTransaction() . May 25, 2016 · If you want to reuse a fragment, you should conver the activity as a fragment. They must be hosted by an activity or another fragment. If Android decides to recreate your Fragment later, it's going to call the no-argument constructor of your fragment. That's all what I want to Of course you can. 1st Fragment contain a ListView of Games . This activity is expensive to load as it contains 3 Fragments. onCreateView() of fragment instead it shows the previous view of the fragment if it exists. Oct 22, 2024 · If your activity uses a layout file (e. Oct 21, 2014 · Now the issue is that we just push fragment(i. Fragments encapsulate views and logic so that it is easier to reuse within activities. Once you define these reusable fragments, you can associate them with an activity and connect them with the application logic to realize the overall composite UI. @Override public void onTabReselected(Tab tab, android. 3. Jun 27, 2022 · if i was in this situation, i would modify my design such that x falls outside of a and b. You can think of a fragment as a modular section of an activity, which has its own lifecycle, receives its own input events, and which you can add or remove while the activity is running (sort of like a "sub activity" that you can reuse in different activities). Jun 22, 2012 · I have created a Fragment by extending Fragment in the support package(v4). It's cleaner and in the long run, much more maintainable. Is it safe to reuse the fragment after it's onDestroy() has been called, or should I recreate the fragment every time it is shown to the user. A fragment defines and manages its own layout, has its own lifecycle, and can handle its own input events. Mar 27, 2020 · Fragments vs. Here is the code from my m **** New bee in android development **** I have 3 fragments ( each as a tab bar on my main activity) I want to re-use the saved instance of the fragment I have created initially by a "new" call, Dec 9, 2016 · I am using NavigationDrawer in my application and each menu item in drawer is a fragment. xml), you can reuse it for the fragment you can effectively convert an activity into a fragment in your Android application using Kotlin. Add, replace, or remove a Fragment from an Activity as needed. Mar 27, 2023 · When I navigate to another fragment and return to fragment A I would like to re-use a list of B fragments for Viewpager2 to avoid re-creating multiple instances of the same fragment (type B). Android DialogFragment: can I re-use, or must I new up another? 1. A fragment is a reusable class implementing a portion of an activity. How to create a class or method for multiple instance of webview. So I post this question to check if anyone knows a better approach to reuse the layout for the same Fragment. layout. When current fragment needs to be destroy, the embed fragment onDestroyView will be called correctly. 2. Jul 18, 2019 · Reuse fragment to create a Dialog. Fragments can't live on their own. Feb 11, 2014 · I want to make fragment and use it in 2 different ways for tablets and smartphones: tablet - fragment shows up as fragment dialog smartphone - fragment shows up in separate activity. When designing your application to support both tablets and handsets, you can reuse your fragments in different layout configurations to optimize the user experience based on the available screen space. Fragments were added to the Android API in Android 3 (Honeycomb) with API version 11. getFragmentManager(). Feb 27, 2014 · This results in a call to onDestroy() of the removed fragment. Some of the fragments for example Fragment A and Fragment D display complex data by querying a database or getting data from the internet etc. You will have to add it again to the fragment transaction. zshrc be modified automatically by other programs, installers, etc. Feb 7, 2019 · I tried like this, and it works for me. protected val viewModel: ReportViewModel by lazy { val report = Dec 11, 2014 · By default, the Fragment will appear in your layout on all devices unless you specifically override your primary layout files in a qualified resource folder. Oct 23, 2013 · On my left i have buttons that trigger the various fragments that are displayed in the layout on my right. FragmentActivity; public class MainActivity extends FragmentActivity { @Override public void onCreate(Bundle savedInstanceState) { super. The condition is known only in the runtime. For screens representations, I'm using Android fragments, some of which I'm trying to reuse in different places of each navigation stack. It turns out that my onSaveInstanceState wasn't calling the superclass onSaveInstanceState, which somehow was causing the fragment manager to lose the fragment instance. 1. Nov 17, 2023 · B. startActivityForResult. Looking at a Fragment's lifecycle, I am not sure about the scenarios that can happen here. Jul 7, 2015 · I use SparseArrays generally when I want to access to the instance of my fragment at a particular position. A fragment can implement a behavior that has no user interface component. . So overloading the constructor is not a solution. Feb 6, 2012 · The detach method removes the fragment from the UI, but its state is maintained by the Fragment Manager. May 15, 2015 · 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 A Fragment in Android is a modular component that represents a portion of the user interface or behavior within an activity. I naturally expected the onPause() method of current Fragment and onResume() of Dec 1, 2013 · So each activity in your application should solve only one kind of task. Read Aug 23, 2022 · I have two reuse fragments, and the second on is a flutter fragment, which behave strange. Generally in android, the fragment must be included in an activity due to that the fragment lifecycle will always be affected by the host activity life cycle. Dec 16, 2018 · I need to open one activity from several different points in the app. You will find the embed fragment onCreateView and onDestroyView or other life-cycle methods won't be called. Adaptability : Fragments help you create flexible UIs that work on different screen sizes and orientations. Oct 16, 2017 · While this is clearly the better way to go, because it follows design principles, I think this answer is too complicated for the OP. g. Remove means the fragment instance cannot be re-attached. each tab displays a view that consists of a list (of type A or B) of items on the left and the I am facing this issue of fragments recreation with Android navigation component. Please reply soon.