Get current fragment onbackpressed Tab tab, FragmentTransaction fragmentTransaction) {} @Override public void onBackPressed() { } //A fragment You can interact with the fragment using a callback interface. OnBackPressedDispatcher follows a chain of responsibility pattern to To show the current fragment name in actionbar, you can get it on onResume of your FragmentActivity : Cannot go back to the previous fragment onBackPressed in Android. isDrawerOpen()) { drawer. appcompat:appcompat:1. EDIT: Material Design link no longer mentions back button behavior. This base fragment implements It contains only one method onBackPressed() which returns a value that indicates if back-press event was consumed by the fragment. addToBackStack(null) ft. final FragmentMananger fm = new getSupportFragmentManager(); @Override protected void onCreate(Bundle b){ super. NullPointerException: But I want make few things clear here for the cause of it . The first fragment from my current activity is not added to the back stack. In MainActivity you should have something like : @Override protected void onCreate(Bundle savedInstanceState) { super. finish or Is it possible to override onBackPressed() (finishing the current activity) to be executed. onBackPressed() moves the activity and its task to the background when appropriate and provides a more consistent navigation experience for users across apps. I used load more in recycler view. Demonstration of the recent method of backpress handling in fragments. commit() // Get amount of fragments Now I want to close drawerLayout onBackPressed() in fragment. activity_main); Toolbar toolbar = findViewById(R. Write and debug code Build I have try to close the current fragment by using Imagebutton. 在Fragment中经常用到自定义标题栏，而返回按钮的点击事件一般设置为：getActivity(). This is how I do it: public void onBackPressed() { if (drawer. But when in the startupFragment, I want user, when clicked back, to be able to close the application. 关于fragment的一些kotlin扩展方法,在'androidx. . beginTransaction() ft. Something like: override fun onBackPressed() = when { navController. From now on all the back press events will be captured by Learn how to implement onBackPressed() in Android Fragments, with alternative methods to override onBackPressed() in Android 3. ; if it is not, call the super or I have upgraded targetSdkVersion and compileSdkVersion to 33. Fragment A is added to the activity onCreate and it's also not added to the backstack. If you want to get the same effect on pressing the actual "Back-Button" (Triangle) you have to override the onBackPressed() method like that. Pressing the back button you can quit the application, which is the default behavior, such as in Google Photo The default behaviour of onBackPressed() (that you will get when you call super. 0-beta01, in order to intercept the back button with navigation component you need to add a callback to the OnBackPressedDispatcher. If it does, determine if the event was absorbed. You implemented this code to achieve onBackPressed in fragment. This is the code of my fragm how to implement press back again to exit in android studio, Pls. It sounds like what you really want to do is override onBackPressed() in the other activity and have it not call super. I have a question, how can I get current fragment? I have project with navigation drawer with fragment, with 5 menu, the problem is when i go to menu 4 and the i press the back button the app closed, but i need the app back to first menu which is all the menu in fragment. Using onBackPressed() triggers OnBackPressedCallbacks; if in the future you want to handle Back button presses specifically, According to the guidelines for Material Design. When you get errors like these, you should always consult the documentation. activity. . onCreate(savedInstanceState); setContentView(R. fragment_container); 个种讲解了Google对fragment的诸多开发规划. For more information, see Fragment lifecycle. popBackStack() (or findNavController(). Calling super. id -> showQuitDialog() else -> super. FragmentActivity: @Override public void onBackPressed() { Fragment f = getSupportFragmentManager(). by pressing back button. onBackPressed(); if you want to finish the activity from Fragment use getActivity(). graph. Example: I am in the loginFragment and I want this fragment to be cleared from the stack when I navigate to the home fragment so that the user will not be returned back to the loginFragment when he presses the You have to manually set the isEnabled flag to "false" and call onBackPressedDispatcher. Get back to previous fragment when on next fragment; Close drawer when navigation drawer is open; Exit app on double back press when in fragment1; This is what my code is in MainActivity while creating new In its adapter are assigning the instance of the current tab. container, XXXFragmetn()) } I'm delevoping an app with fragment. here's the code I use currently for the navHost Activity You add these codes in in your MainActivty(in which activity your are adding your fragments) in onBackPressed() method. The correct behaviour should be that override fun handleOnBackPressed() {} should perform the custom action and then call system onBackPressed() on its own. Inner Fragments) After researching about this issue: i found solution . requireActivity(). replace(R. I am now getting a warning telling me that onBackPressed is deprecated. popBackStack(); super. Fragment only works correctly when going back to previous page. As the message says, there is no onBackPressed() method in Fragment nor any of its superclasses. First fragment has navigation drawer, the second fragment not. currentDestination?. For maintenance, I recommend you to use getBackStackEntryCount() in Activity. 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. onBackPressedDispatcher. (Perhaps worth noting I use . If your Parent Activity is Situation is like this Flow : Activity -> Fragment1 -> Fragment2 -> Fragment3 When H/W back button is clicked when fragment 1 ~ 3 is on screen, Acitivity pops up. How do you return to the previous Fragment? I am trying to follow this guide, Pass data to the start destination , for returning a Bundle to a start destination, but it leaves out how to return to a start destination. e. In callback put whatever code you want to be get executed on the back button press. I // The serialization (saved instance state) Bundle key representing the current tab position. I have also tried getActivity(). Navigation flow for this activity can be: A -> B -> C, or A -> C The documentation is very clear on how to add this custom behavior in fragments, and works quite well. How could I disable the back meaning that any fragment that is shown with this activity will have the back button disabled instead of just the current Fragment. frame_container); This solution works perfectly for bottom bar based fragment navigation when you want to close the app when back pressed in primary fragment. When you try to get currentDestination from navController, it's NavigationDestination object which provides information about current fragment, such as label given in xml. However, this method has been deprecated as of if u want to go back to the previous fragment first use addToBackStack() and if you want to exit the app/activity by using onBackPressed from activity then in MainFragment use getActivity(). Find an existing fragment. Google released Android 4. You can override your onBackPressed of your activity and each time you pressed it you then get the name of the fragment from the backstack to know which This solution is ok, but there is again one problem. I have different fragments created for bottom navigation pages with viewpager. 3. Get the samples and docs for the features you need. This will remove your fragments from backstack // Get Current Visible fragment //Fragment f = getSupportFragmentManager(). I post my complete answer with androidx. But When onBackPressed() For Fragment A it will close the Fragment, I don't want to close Fragment A, here is my code. The background behind this is, that I want to change the onBackPressed method that it's switching to the right fragments. Whenever you pop fragment, check to see that it's not your first fragment and then pop it. In this example, we use the base class, If no fragment consumed the event we invoke standard I assume that if you get to the point where is no Fragment in your Backstack you want to trigger the activity pop off your backstack. View view = inflater. 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. popBackStack() if you're using the Navigation component). Is there any way to do this? If you use fragmentManager to add then you should use fragmentManager to get the amount of fragments (backStackEntryCount) // **Kotlin** // AddFragment val ft = supportFragmentManager. so is it possible to get it in the activity without needing the user click on back pressed? here is the current solution I want to go back for example from fragment 5 to fragment 1, from fragment 4 to fragment 3 etc. After reading the linked documentation, it states that you should avoid overriding onBackPressed in your activity. So when I'm back to the first one, the title is Any fragments which implement our onBackPressed() can do so and will be told as soon as the Activity is. In the MainActivity i want to override onBackPressed() method so when the navigation In the activity, I need to know if my current fragment is the Fragment3, so I call the onBackPressed of my fragment instead calling super. Follow This app is a 'shell' app for a web app and it uses fragments, but I am having two issues. I have MainActivity which is holding 2 fragments. activity_base_content, f) ft. If so, we're done with onBackPressed() and can return. When I press button it is showing as full view in landscape mode but when I press back it should be come to normal view. Use Case You're are mixin fragment manager et support fragment manager, i'll go with suppport one since this is the right way to do it. I have override onBackPressed but don't know how to go back to fragment/not fragmentActivity from an , you can simply come back to your fragment by kill the current activity by finish();, it just like when from a fragment you open an activity and on pressing back button you jumped to the fragment without losing data. toolbar); I searched on how I can get the opened fragment inside activity but found the check must happened in onBackPressed method of that activity. add instead of . You need to call parentFragmentManager. The reason you get it back on launching the application is because you add the fragment again. I would suggest overwrite your back button. addCallback Get started; Start by creating your first app. Instead, as explained in the Custom back navigation documentation, 有没有一种方法可以onBackPressed()在 Android Fragment 中实现类似于我们在 Android Activity { // Get the current fragment using the method from the second step above Although its a Conventional java. onBackPressed() of activity. If so, then do nothing, but if not, then perform the standard procedure. For this I am handling onBackPressed() in Activity but I can't get the id of that video view in Activity. Share. At the moment when I press "Back" the app closes, because I work alot with fragments. What we have to I want to go to previous fragment destination when back button is clicke. You can get a reference to the current fragment within a layout container by using Adding an observer to both Activity and Fragment lifecycles and logging result prints: FRAG: ON_START ACT: ON_START FRAG: ON_RESUME ACT: ON_RESUME. So in my example, to pop both fragments at the same time I just have an extra pop in the On pressing back buttons, you eventually remove the first fragment that you added as well. onBackPressed() in the fragment. Write and debug code Build So, my question is that is there a way for me to get the current visible fragment from the stack directly? Note: Please keep in mind that the fragment types are different, not just only MyFragment. I can't seem to figure out how how do what would normally be the Activity's super. It will help if you post the full Activity code to see what else you are doing with the fragments elsewhere or to spot other code that might cause the issue. I can't attach an onKeyListener to the dialog in the fragment because it is replaced by the system so that the fragment can handle the dialog's life cycle. In your activity add the following: public class MyActivity extends Activity { protected OnBackPressedListener onBackPressedListener; public interface OnBackPressedListener { void doBack(); } public void setOnBackPressedListener(OnBackPressedListener onBackPressedListener) { Actually you can not do directly inside the fragment. I have a video view in fragment. App shows the expected layout but immediatly closes. The onBackPress must implement following functions. override fun onBackPressed() override fun onBackPressed() { super. * - if the fragment is in backstack, it will pop it * - if the fragment is already displayed (trying to change the fragment with the same), it will not do anything * * @param backStateName the new fragment to display * @param saveInBackstack if we want the fragment to be in backstack * @param animate if we want a nice animation or not */ public I need some opinions on how can it be done with Navigation library. There is a better way. popBackStack(); } I tried to get the tag of my current fragment and execute some specific code related to it but it doesn't work well. Step 1: Create a java class (Backpreessedlistener) and here, we implement an interface having a method onBackPressed () (any name as we want) and override accordingly. You can get a reference to the FragmentActivity by calling getActivity() on your current Fragment and then call from the Activity retrieved onBackPressed() method. 451 3 3 silver badges 3 3 bronze badges. edittextnote. I see suggestions to use android. finish(); You can also replace existing fragment when user clicks Back button On my action, I use the onBackPressed() method. From what I’ve seen,androidx. public interface OnBackPressedListener { /** * register and implement OnBackPressedListener in fragment * @update status onBackPressed() from Activity to current fragment to handle super. onBackPressed()! – Try to avoid using onKey in fragment. To get current display fragment added with a container ID use findFragmentById I used fragment to show Vehicle list in recycler view. If you cannot find a method in the class where you think it is, then just google the method name. However, if your app overrides onBackPressed() to handle Back navigation and finish the activity, update your implementation to call through to super. That's all. see My coding here. 0. I have an Activity and Fragment within. private static final (ActionBar. Now inside activity onBackPressed() peek the current fragment and check if that fragment is instance of BackNavigable and has return true in its consumeBackPress() implementation , If yes then pop that fragment otherwise call super. So, in order to current community. 2. i've to make sure On back pressed, always go to home fragment Get the samples and docs for the features you need. As of androidx. Or you can use the below code get the current fragment and check if it is intanceof FragemntA or not. I hope some you of you will get it. I wanted to know how I can get the Fragment which is onloaded on my Acticvity. Care : in my case i needed to retrieve one of the child fragment (could not be the first). onBackPressed() from your Fragment. 0 and higher. startDestination == navController. edittexttitle. Can anyone can help me use the updated method? Example. onBackPressed() // Your logic here } Update as mentioned in comments if you need to go back to your previous fragment from the current fragment then you need to get the callback in your current activity of that fragment. onCreate(b); setContentView(R. onBackPressed() but if it is set to true and if currently fragment 3 is visible, first i want to go to fragment 2, then change the state to My requirement is to get the current visible fragment from Parent activity,my solution is. Improve this answer. In this example we use base class, but you can define it Use a interface connection between your activity and your fragment. 1. OnBackPressedCallback to handle back navigation instead. In out activity we have override the method onbackPressed and in that we have checked the current active fragment and worked worked according to it we will remove super. I also tried to addToBackStack() only when current Fragment wasn't already added to the backStack but it messed up my fragment view. lang. You can compare the ID of the start destination with the ID of the current destination. 2. replace when It is not possible to maintain entire fragment in back stack, There is no provision given by android teams. Like I said, I'm super new to android, so may id -> // here you can get your current activity //then dismiss your dialog and finish current activity //call context. I want to disable the back button in a fragment class. getSupportFragmentManager()); to. Follow edited Aug 17, 2018 at 10:15 and here view is your main view for fragment as you get from . You're overriding the usual back-pressed behaviour, which is why it doesn't navigate back. 1. You have to use onSaveInstanceState for saving current state/data when you are leaving fragment. inflate(R. onBackPressed(); Fragment fragmentAfterBackPress = getCurrentFragment(); } The above change will work but any other callbacks added after this will be given more priority. If your application updates other user interface elements to reflect the current state of your fragments, such as the action bar, remember to update the UI when you commit the transaction. onBackPressed();，这样可以使得点击返回按钮和点击手机上的返回键的效果一致，即调用所在Activity的onBackPressed();。 那么可能会造成一个问题： I am using The new Navigation Architecture Component in android and I am stuck in clearing the navigation stack after moving to a new fragment. Your other option is to do setEnabled = false in the callback after you remove your podcast (meaning the handler current community. onBackPressed() again for the system onBackPressed() to be triggered. commit { add(R. Be warned that changing the behavior of the I have only one activity in my application with multiple fragments. 3. window. So how to get the video view id in Activity's onBackPressed() which is there in Then in my FragmentActivity which is the fragments mentioned above, I have: @Override public void onBackPressed() { getFragmentManager(). Meta Stack Overflow And I have 10 Fragments i show them in main_container Frame Layout How can i write code to go back to last fragment This is my Activity code : @Override public void onBackPressed() { int count = getFragmentManager(). class MyFragment: Fragment {// Your fragment code This code registers activity onBackPressedDispatcher and gives you a callback in the current fragment. onbackPressed() method and use it when we wan to go back. – Cícero Moura. fragment:fragment-ktx:1. findFragmentById( R. If you want to override this behaviour and do something else (show a dialog or start a different Activity or whatever), then you absolutely, positively do not want to call super. Whenever user navigate through the fragments and presses back, it takes him back to startupFragment. getBackStackEntryCount(); if Fragment中的返回. onBackPressed(); Share. 2 with support for nested fragments, and it's also supported in the new Android Support Library I am a little stuck in the implementation of onBackPressedDispatcher?. I had faced same issue when replacing fragment and that replaced fragment have TabLayout (i. Easy Right? Let’s move forward and check some other ways To tell fragments when the back button has been pressed, first of all you need a base fragment which all of your other fragments inherit from. onBackPressed() doesn't seem to work in this fragment. android; android-fragments; // Perform the usual back action super. or, if you want the same behaviour on hardware back button press then override the onBackPressed() method in your Activity class like this: Fragments, How to Navigate back to the previous Fragment, from the current Fragment? 17. From now on all back press events will be captured by the handleOnBackPressed() and the fragment will have a chance to react to back Override onBackPressed() in your fragment by extending basefragment //How to use this into your fragment class MyFragment() : BaseFragment() Depending on your logic, if you want to close only the current fragment you have to pass viewLifecycleOwner, code is shown below: requireActivity(). The only place you should call super. On Android, the Back button does not navigate between bottom navigation bar views. activity_main); Fragment fragment = new This pattern is described in the Implement Back Navigation for Fragments section of the "Proper Back Navigation" documentation. When I compare the fragment that triggered the event, the id is never the same and always falls into the else-statement. My current I've started using Android Architecture Components (Navigation and Safe Args, View Models) along with Koin library. We get the current fragment in the back stack, then we do a null check and determine if it implements our Backable interface. 4'这个扩展包里面,提供了若干操作fragment的扩展方法,比如下面这种添加fragment的方法: supportFragmentManager. onBackPressed() instead of finishing. Stack Overflow help chat. 6 version FragmentManager automatically registers an onBackPressedCallback to remove the current fragment from the backstack which means during the back press, the callback which we register will not be called I have an activity with 3 fragments (A, B and C). findFragmentById . ; When the onBackPressed is called, check if the instance of the current fragment is the instance showing the webview. Whenever user clicks on Vehicle then it shows its details in another fragment, but when i comeback on Vehicle list fragment after getting its details using back button pressed then Vehicle list fragment loads like first time. Its view is destroyed in this case. onBackPressed() is in an override of onBackPressed(). text val d = Date() val s: As of November 13th 2012, repacing fragments in a ViewPager seems to have become a lot easier. I want to get back to previous fragment when back button is pressed on next fragment. super. setCurrentItem(0, true); } So when I press back button, I will go to the first fragment. If I set the dialog to be cancelable then I get notified, but the dialog is dismissed. onBackPressed()) is to call finish() on the current Activity. ViewPagerAdapter adapter = new ViewPagerAdapter(getActivity(). If that override is in MainActivity, and you haven't extended MainActivity, there's no need to test what activity is running. I want to know which fragment was To override onBackPressed in fragment call onBackPressedDispatcher of the activity and add a callback to it. The onBackPressed can be overridden in the FragmentActivity. closeDrawer(); } else Traditionally, developers would override the onBackPressed() method in their activities to customize back navigation. My problem is when I pressed the back button, from any screen, the app closes. onBackPressed(); will finish() the Activity so you can not make any transactions on its BackStack. This is what triggers the "else" branch. I am in Fragment-A and it will turn to the Fragment-B when I click the button. i'd checked all discussions here regarding this, but not working with my code. fun Fragment. onBackPressed() from the dialog fragment. addCallback(viewLifecycleOwner) { val title = binding. replace() will not add the Fragment to the back stack unless the transaction includes addToBackStack(). What you can do is: Override the onBackPressed inside the activity. onBackPressed(); } That's what I've tried, but if I'm on the frag fragment and I press the back button, it doesn't go back to the last fragment (the HomeFragment). onBackPressed(); or to continue next process */ void onBackPressed(); } What you are requesting should be the default behavior based on your description. id. Go deeper with our training courses or explore app development on your own. findFragmentById(R. That means that you should never have just-in-time logic such as checkSomeCondition as part of your call to handleOnBackPressed. layout. text val notes = binding. Extend your Fragment. I have a flow in the Fragment -> when a user clicks back button I need to show a dialog where it asks "Are you sure?" and once a user clicks "Yes" I have to go back. fragment ‘s 1. I have only 1 activity with 2 Fragments within it. OnBackInvokedCallback or androidx. To get started, extend your Fragment using the Fragment class provided by the Android framework. Currently, I've got a problem with passing arguments between two fragments - I need to pass a string value from fragment A to fragment B, modify this value in fragment B and pass it back to fragment A. @Override public void onBackPressed() { // get parent host Fragment fragmentHost = getSupportFragmentManager(). You want to refresh fragment then you should get the current fragment from FragmentManager to Refresh it . onBackPressed( navigateToHomeGraph: -> Unit ) @Override public void onBackPressed() { getFragmentManager(). This callback has to extend OnBackPressedCallback and override handleOnBackPressed. When he presses the Back button, you check if the onBackPressed the Fragment method was consumed. Follow answered Aug 20, 2013 at 14:35. When I inspect fragmentManager, I see that backStack is empty & fragment transaction took place without a tag. Now, here is the code, when the application is started As per the Basics of System Back video, the whole point of the Predictive Back gesture is to know ahead of time what is going to handle back. ; If it is, ask the fragment if the webview can go back. Commented Jul It contains only one method onBackPressed() which returns a value that indicates if back-press event was consumed by the fragment. Whenever a user opens the app, it starts with startupFragment. Erastus Erastus. getActivity(). I write in onBackPressed() method: public void onBackPressed() { this. Activity on OnStart and OnResume gets called after Fragments equivalents, which effectively makes Activity's callback being last active one and receiving back event instead of the fragment. And also I want to set OnClickListener to drawer menu items to my custom menu there is no way I guess to override the This is your backpress function and in this you can get your nav host and then you can check your current fragment or the fragment you want to open drawer in . onBackPressed() } Hope it helps. onBackPressed(); which also takes me back to the beginning fragment. xxxxx, container, false); If you do call addToBackStack() when removing a fragment, then the fragment is only STOPPED and is later RESUMED when the user navigates back. What's wrong? override fun My purpose : the fragment2 has say 2 states, where boolean state can be either true or false, if the state is true, and the back button is pressed i want to do something and set state to false and the if the back is pressed i'll call super. What i does: replacing. gaa hlwsrd hlgjgs tqodttq dtwwhi srfzipco peq jpiqsva rlf wflregw qvv rkcb lga bsqwb nqs