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[Android] App crash on start (NullPointerException)

See original GitHub issue

Hi All,

I’m using this library with react-navigation

when enable this library using:

// enable in App.js
import { enableScreens } from 'react-native-screens'
enableScreens() // OK on iOS but crash on Android

Then when I start my app in Android it crashes right at the beginning

Here the error:

 --------- beginning of crash
2020-01-11 17:56:41.155 25469-25469/com.myapp E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.meadow9, PID: 25469
    java.lang.NullPointerException: Attempt to invoke virtual method 'boolean com.swmansion.rnscreens.ScreenContainer.isTransitioning()' on a null object reference
        at com.swmansion.rnscreens.ScreenFragment.onCreate(ScreenFragment.java:51)
        at androidx.fragment.app.Fragment.performCreate(Fragment.java:2586)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:838)
        at androidx.fragment.app.FragmentManagerImpl.addAddedFragments(FragmentManagerImpl.java:2100)
        at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManagerImpl.java:1874)
        at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManagerImpl.java:1830)
        at androidx.fragment.app.FragmentManagerImpl.execPendingActions(FragmentManagerImpl.java:1727)
        at androidx.fragment.app.FragmentManagerImpl$2.run(FragmentManagerImpl.java:150)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7356)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

My environment:

react-native: 0.61.5
react-navigation: 4.0.10
react-native-screens: 2.0.0-alpha.22 (Other setups I already follow documents)

Can any help this,

Many thanks

Issue Analytics

State:
Created 4 years ago
Reactions:19
Comments:17 (4 by maintainers)

Top GitHub Comments

1reaction

kmagieracommented, Feb 5, 2020

I can take a look but before I do I’d need to get a minimal repro app where I can see the crash happening. Apparently in this case the stacktrace that’s provided in the issue description does not say much about what could be causing the issue (I see that there one object is null but I wouldn’t expect it to be null at this moment and adding nullability check won’t resolve this problem)

0reactions

WoLewickicommented, Apr 1, 2020

Ok, so I am closing it. Feel free to comment if something still does not work as it should.