AndroidX , Can't access ViewModels from detached fragment

Description

java.lang.IllegalStateException: Can't access ViewModels from detached fragment
        at androidx.fragment.app.Fragment.getViewModelStore(Fragment.java:328)
        at androidx.lifecycle.ViewModelProvider.<init>(ViewModelProvider.java:67)
        at leakcanary.internal.ViewModelClearedWatcher$Companion.install(ViewModelClearedWatcher.kt:56)
        at leakcanary.internal.AndroidXFragmentDestroyWatcher$fragmentLifecycleCallbacks$1.onFragmentCreated(AndroidXFragmentDestroyWatcher.kt:38)
        at androidx.fragment.app.FragmentManagerImpl.dispatchOnFragmentCreated(FragmentManager.java:3496)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1419)
        at androidx.fragment.app.FragmentTransition.addToFirstInLastOut(FragmentTransition.java:1195)
        at androidx.fragment.app.FragmentTransition.calculateFragments(FragmentTransition.java:1078)
        at androidx.fragment.app.FragmentTransition.startTransitions(FragmentTransition.java:117)
        at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2408)

Version Information

LeakCanary version: 2.4
Android OS version: all

Issue Analytics

State:
Created 3 years ago
Comments:5 (2 by maintainers)

Top GitHub Comments

1reaction

LiamUcommented, Jan 30, 2021

@pyricau

Found the reason, it is our developer’s problem. It is because he overwrites getContext() in the business fragment, and the context value has not been initialized when LeakCanary calls getContext().

thank you very much.

0reactions

LiamUcommented, Jan 30, 2021

The version of AndroidX I use is

force group:'androidx.fragment', name:'fragment', version: '1.0.0'
force group:'androidx.activity', name:'activity', version: '1.0.0'

Wait a moment for me to reproduce the scene…

Top Results From Across the Web

Android, Can't access ViewModels from detached fragment

The #1 problem I see (also mentioned by some other user(s) is that you appear to be calling a public method in a...

Android, Can't access ViewModels from detached fragment ...

The #1 problem I see (also mentioned by some other user(s) is that you appear to be calling a public method in a...

Can't access ViewModels from detached fragment at androidx ...

经过排查定位放线xml中默认将ViewPager给Gone了，也就是在ViewPager中初始化了fragment但是fragment还不可见，viewmodel对象当前还没有实例化。

fragment/fragment/src/main/java/androidx ... - Google Git

throw new IllegalStateException("Can't access ViewModels from detached fragment");. } return mFragmentManager.getViewModelStore(this);.

Source Code for Fragment.java - AndroidX Tech

... safe to access the view lifecycle is * {@link #onCreateView(LayoutInflater, ... IllegalStateException("Can't access ViewModels from detached fragment"); ...