Get activity from fragment. " The example tha...

  • Get activity from fragment. " The example that follows shows how to get a fragment reference, but not how to call specific methods in the fragment. In conclusion, knowing when to use a fragment versus an activity is key to developing an efficient and successful app. ilfsTextArea); // set the The android team introduced Navigation Component 2 years ago to encourage developers to use the single activity UI pattern. The menu drawer of apps like Gmail is the best example of this kind of android fragment. That is how an activity can communicate with a fragment. With the introduction of the navigation graph view in android studio, it As with an Activity, you can save the variable assignments in a Fragment. frameTitle I tried the following A Fragment represents a reusable portion of your app's UI. This guide explains what actions are and demonstrates how you can create and use them. Fragment/Activity will implement the interface from the dialog. This example demonstrates how do I call an activity method from a fragment in android. The Fragment will be attached to a null activity until onActivityCreated that is, if you call getActivity() in onCreate or onCreateView, it will return null because the Activity hasn't been created yet. Just an idea, but you can use activityViewModel to share data between activity and fragment, in that way you don’t need reference to fragment. First is activity, second is a fragment where I have some EditText. The supportFragmentManager has findFragmentById() and findFragmentByTag() methods that you can use to get a fragment instance. Here is the Android Studio proposed solution (= when you create a Blank-Fragment with File -> New -> Fragment -> Fragment (Blank) and you check "include fragment factory methods"). You can use it is like the yourActivity. I want to achieve similar to call on a static method, FragmentActivity is a base class for activities that want to use the support-based Fragment APIs. I think your answer needs my code to iteratively check each of my fragments, and find out the visible one To pass data back to fragment A from fragment B, first set a result listeneron fragment A, the fragment that receives the result. Fragments can't live on their own. For this reason, the Activity Result APIs decouple the result callback from the place in your code where you launch the other activity. Also in the parent fragment you will need to create a dialog when you click on the button and pass the data to display + the You create fragments by extending Fragment class and You can insert a fragment into your activity layout by declaring the fragment in the activity's layout file, as a <fragment> element. Use cases: In short, if you want to get the host activity inside fragment’s lifecycle methods, it’s ok to use requireActivity() without checking null. I had forgotten it when I ended up here. Overview Each action has a unique ID and can contain additional attributes Get the samples and docs for the features you need. Feb 15, 2012 · Ok, but I need a way to immediately get the currently displayed Fragment instance, not iteratively check through all fragments and then decide which fragment is now displayed on the screen. Note: Some Android Jetpack libraries, such as Here is the Android Studio proposed solution (= when you create a Blank-Fragment with File -> New -> Fragment -> Fragment (Blank) and you check "include fragment factory methods"). CallsetFragmentResultListener()on fragment A's FragmentManager, as shown in the following example: In fragment B, the fragment producing the result, set the resulton the same FragmentManager by using the same requestKey. Jul 23, 2025 · Introduction to Fragments in Android In Android, a fragment is a portion of the user interface that can be used again and again. Fragment manages its own layout and has its own life cycle. Fragment to Activity Communication For a fragment to communicate with its parent activity, it needs to get a reference to its activity. In your Fragment, define a variable that would reference the parent Activity. Activities are typically used for simple user interfaces and for launching other components of the app, while fragments are used for more complex user interfaces and for passing complex data between screens. Evoking a navigation action takes the user from one destination to another. はじめに Fragmentにおける Activity と Context の意味や使い分けがわからなかったので、調べてみました。 結論 Context で済む nullを許容する → this. I looked over the Fragment documentation but there aren't many examples describing what I need. This state transition is triggered not only by the parent activity or fragment being stopped, but also by the saving of state by the parent activity or fragment. Since fragment is a small portion of the bigger user interface, it can only be initialized inside an activity or another fragment. I want the fragment to give the method data and to get the data when the method return. They must be hosted by an activity or another fragment. any I do the same as you explain, override onActivityResult () in activity also in fragment with super in both and make startActivityForResult (intent ,i), but did not work, I need help please I want to add a Fragment to an Activity that implements its layout programmatically. This type of fragment in android is mostly used for mobile phones. Using this class to create a dialog is a good alternative to using the dialog helper methods in the Activity class, as fragments automatically handle the creation and cleanup of the Dialog. The Fragment library also provides more specialized fragment base classes: DialogFragment Displays a floating dialog. Spanning 11 boss encounters across a sprawling castle, there’s a lot to clear through. 139 I see in the Android Fragments Dev Guide that an "activity can call methods in a fragment by acquiring a reference to the Fragment from FragmentManager, using findFragmentById() or findFragmentByTag(). Documentation tutorial: I need to pass data between from 5 fragments to one Activity, those fragments send data one after another when i reach 5'th fragment then i need to store all 5 fragments data how can we do this. When you call getActivity() you get an Activity which is a Context as well. Here is the type Once the fragment is no longer visible, the Lifecycle s for the fragment and for its view are moved into the CREATED state and emit the ON_STOP event to their observers. It contains buttons that when clicked start new activities (startActivity from a fragment simply calls startActivity on the The activity hosting the dialog creates an instance of the dialog with the dialog fragment's constructor and receives the dialog's events through an implementation of the NoticeDialogListener interface: Inside your onOptionsItemSelected(MenuItem item) Activity's method, make sure you return false when the menu item action would be implemented in onOptionsItemSelected(MenuItem item) Fragment's method. I have also read documentation many times but I can't find the best way to pass data from activity to fragment. You can use this code, make sure you change " ThisFragment " as your fragment name, " yourlayout " as the layout name, " GoToThisActivity " change it to which activity do you want and then " theButtonid " change it with your button id you used. Apr 5, 2025 · Start an activity from a fragment and call an activity method from a fragment in an Android app. You learn more about communicating between an Activity and a Fragment later in this chapter. The fragment’s view hierarchy becomes part of, or attaches to, the host’s view hierarchy. Once created, these fragments can be integrated into an activity Apr 12, 2022 · To get the current fragment that’s active in your Android Activity class, you need to use the supportFragmentManager object. Simply Use the getRootView() method to get the data of your fragment in Activity. Thanks for taking a look at our Karazhan Attunement Guide for TBC Classic! Located east of Duskwood in Deadwind Pass, Karazhan is the expansion’s first raid and it’s a lengthy one. Now from my mainactivity I go to next activity where I perform some operations and get back to mainactivity using 21 getActivity() This method gives the context of the Activity. com. Learn the correct approach with this guide on rrtutors. I am trying to pass a bitmap from one fragment to another--and am using this post as a guide: send Bitmap using intent Android What i am having trouble with is in the receiving activity fragment 50 Creating event callbacks to the activity Having the Fragment register a callback in its onAttach method, casting your Activity to an instance of an interface you provide Use a shared ViewModel that your Activity and Fragment use to communicate. Now implement it to your first activity and call second activity from there. Android Fragments FAQ: How do I access an Activity widget from an Android Fragment? All you have to do in your Fragment code is use the getActivity method to get a reference to your Activity, and then the usual findViewById method to get a reference to your widget: // get a reference to the widget EditText ilfsTextArea = (EditText)getActivity(). . Is it possible without custom bookkeeping in my Activity? When using newer version of Support Library, when Fragment is not hosted by an Activity you can get different objects when calling getActivity() and getContext(). However, before you can step… Fragment currentFragment = //what is the way to get current fragment object in FrameLayout R. How to correctly transfer data from a fragment to an activity? I do as follows: 1- Create an interface interface IProfileToActivity { fun profileInfo(data: AllHeroes. I haven't found a simple way to get all currently active (visible, currently in Resumed state) Fragments in an Activity. Fragment Result API We continue the story about the Jetpack library’s latest updates that are designed to simplify data exchange between different parts of … To get the benefits of ViewModel in Compose, host each screen in a Fragment or Activity, or use Compose Navigation and use ViewModels in composable functions as close as possible to the Navigation destination. In activity I have a subclass with async-task and in method doInBackground I get some result, which I save to The right way to get a result. 0 Best way of calling Activity from Fragment class is that make interface in Fragment and add onItemClick() method in that interface. See Displaying dialogs with DialogFragment for more details. Fragment Result API We continue the story about the Jetpack library’s latest updates that are designed to simplify data exchange between different parts of … I set the content view in the FragmentActivity, and the activity will create the fragment instance for me according to the class name specified in the layout file. The right way to get a result. Get current activity from fragment Asked 9 years, 8 months ago Modified 9 years, 8 months ago Viewed 50k times Trying to call a method in my activity from a fragment. If you're using the code inside of one of those classes then you can just replace mContextReference with either getActivity() for Fragment or this for Activity on the first line and this for the second line. List Fragment: This Fragment is used to display a list-view from which the user can select the desired sub-activity. In this article, we’ll look at how to use it and discuss its benefits You can build connections between fragments using navigation actions. Global) } 2- Then I inheri These get called after the Fragment belongs to an activity and just before stop being so respectively. I know there are many topics about this here. Part 2. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. I want to be able to show the results You can build connections between fragments using navigation actions. In 2020, Google introduced a powerful tool — the Activity Result API. Jan 21, 2025 · To maximize reusability, fragments should be designed as fully self-contained components that manage their own layout and behavior. A fragment defines and manages its own layout, has its own lifecycle, and can handle its own input events. this. It may cause fragment memory leak. Overview Each action has a unique ID and can contain additional attributes Single Fragment: Display only one single view on the device screen. When starting an activity for a result, it is possible—and, in cases of memory-intensive operations such as camera usage, almost certain—that your process and your activity will be destroyed due to low memory. findViewById(R. How can I get the context in a fragment? I need to use my database whose constructor takes in the context, but getApplicationContext() and FragmentClass. this don't work so what can I do? Database I have a fragment in an activity that I am using as a navigation drawer. id. Then in the Fragment 's onCreateView, connect the variable to the Activity and then you have a reference that you can use to get any public variable in the MainActivity. PreferenceFragmentCompat I have two classes. If view in fragment, this method will get activity's LifecycleOwner. Similar to Activity. context nullを許容しない → requireContex When using newer version of Support Library, when Fragment is not hosted by an Activity you can get different objects when calling getActivity() and getContext(). But how can I get that fragment Because all fragments communicate between each other through the activity, in this tutorial you can see how you can send data from the actual fragment to his activity container to use this data on the activity or send it to another fragment that your activity contains. Because data in a Fragment is usually relevant to the Activity that hosts it, your Activity code can use a callback to retrieve data from the Fragment, and then restore that data when recreating the Fragment. That is because you can scope a ViewModel to Navigation destinations, Navigation graphs, Activities, and Fragments. That means that we can prevent that callback to happen by controlling it in the onDetach method. Samples User interfaces Background work Data and files Connectivity All core areas ⤵️ Tools and workflow Use the IDE to write and build your app, or create your own pipeline. this don't work so what can I do? Database Basically, each Activity has a FragmentManager class that maintains all the active Fragments, and there are two ways of finding them: Using a unique TAG that you pass while showing a fragment, or passing the container view-ID where the fragment was added. Warning: The navigation actions API is available only when using the views UI framework. Tip: For more I have a navigtion drawer by default on create my home fragment launches. When the activity has that reference to the fragment, it can access all its public fields and properties, and call all its public methods. onSaveInstanceState(Bundle), the data you place in the bundle is retained through configuration changes and process death and recreation and is available in your fragment's onCreate(Bundle), onCreateView(LayoutInflater, ViewGroup, Bundle), and onViewCreated(View, Bundle) methods. But when you call getContext you will get a Context which might not be an Activity. The method getActivity() is normally used in fragments to get the context of the activity in which they are inserted or inflated. Global) } 2- Then I inheri This document explains how to integrate traditional Android View hierarchies and Fragments into a Jetpack Compose UI, and how to interact with the Android framework from Compose. znjx8, 9u0nb, os3y8, dfqo, 5oqn4, jrnmhh, ippt1, lh4nx, mnyv, jacq,