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Questions tagged [fragmentmanager]

FragmentManager is an interface for interacting with Fragment objects inside an Activity in Android. While the FragmentManager API was introduced in HONEYCOMB, a version of the API at is also available for use on older platforms through FragmentActivity. For more information about using fragments, read the Fragments developer guide.

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FragmentTransaction hide/show doesn't work sometimes

I have an activity with bottom navigation tabs that are changing the fragments in it. When I click back and forth on those tabs, at some point it stops working. Code executes just fine as I put some logs in it. But the fragments aren't being…
Jacek Kwiecień
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Manage Fragment Backstack Flow without flicks

I have created an AppCompatActivity Opened fragment A->B->C->D->E->F with replace() I am on F which contain button when I press the button I want to clear Fragments up to C and Want to open G on top of C so new Sequence will be A->B->C->G.I can…
Kirtan
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What should I use in place of getWidth() and getHeight() to know when width is greater and when height is greater

import android.app.Fragment; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Display; import…
Ankit
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onBackStackChanged() called twice when new fragment is added in backstack

So, i have notice interesting problem. When i add new fragment programmatically, method onBackStackChanged from OnBackStackChangedListener is called twice, but it must be call only one time. Here is my code of activity: import…
Alex D.
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onViewCreated - wrong place to replace fragment?

I'm showing an empty fragment if the user has no data. In that emptyFragment (in onViewCreated) I check for a condition and sometimes would like to replace that empty Fragment with another one, so I call a method on the according activity which…
swalkner
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FragmentManager.getFragmens().size() dont decrease after FragmentTransaction.remove(Fragment)

After a while searching the reason of my NPE, i noticed that despite FragmentTransaction.remove(Fragment) reallys removes the Fragment, the size of the List returned by FragmentManager.getFragments() still the same. This screenshot shows what is…
Informatheus
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Cannot setMaxLifecycle for Fragment not attached to FragmentManager: ViewPager

I have tried with so many given examples but nothing worked for me. When I am trying to remove a page dynamically from viewPager then I am getting exception: Cannot setMaxLifecycle for Fragment not attached to FragmentManager My PagerAdapter is…
Anupriya
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what to replace deprecated getFragmentManager() method with (API 28)?

I have an Android application I've been working on, min sdk = 21. In it, I use a custom PreferenceActivity that in turn calls a PreferenceFragment. However, after recently updating to API 28, I noticed that the getFragmentManager() method has been…
Peter Mghendi
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How to get NavHostFragment

I'm integrating Android's Navigation Architecture Components into my app. I ran into some problems with passing data to the start of a fragment from an activity, so I was following this answer: Navigation Architecture Component- Passing argument…
Saba Imran
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Android: Fragment manager becomes null

I am getting crashes for my app. Basically, I have a fragment in which a dialog has to be displayed in one scenario. I had created dialog by extending dialog fragment. The problem is for some users it crashes throwing null pointer exception. This…
Nitish
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Check if a fragment exists and reuse it

I'm using the following code to create a fragment everytime the user click on an item in a list view. But in this way the fragment is created at every user click. What I want is to reuse the old fragment (if it exists) and only reload its content…
Usi Usi
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Fragment with ViewPager inside Fragment and FragmentStatePagerAdapter results in Exception (with complete example)

I have a simple Fragment with a ViewPager. I'm using the up to date support library, v4 rev18! If I show the sub fragment the first time, everything works fine, if I go back and show it again, the app crashes with the following exception: I have a…
prom85
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Android crash onCreate() - Fragment cannot be cast to androidx.navigation.fragment.NavHostFragment

I decided to execute a Firebase Robo Test for my app and noticed that it always crashes after opening an external activity and then returning back to the app. I was able to duplicate the problem by enabling the "Don't keep activities" in the…
Miha M
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Jumping scrolling when switching fragments

Inside a ScrollView I am dynamically switching between two fragments with different heights. Unfortunately that leads to jumping. One can see it in the following animation: I am scrolling down until I reach the button "show yellow". Pressing "show…
stefan.at.kotlin
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React Native : add fragment to mainactivity using Android Native Modules

I have a specific Android native library to integrate the camera features. The library provides the Fragment with the all it features. I just want to integrate that with Mainactivity in React Native app. I have followed the link "Add fragment into…
Praveen
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