Crash on first launch (only)

[abhinavc]

Hi Danvick,
Noticing a strange behaviour. My app crashes only when

• I do a fresh install (not on subsequent re-runs)
• and click on a FormBuilderTextField (not on any other type of field)

The stack trace suggests a problem on the Android end - perhaps with the plugin from adee42.
If this is a dependency of FormBuilder, then what could be causing the crash?

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.getWindowVisibleDisplayFrame(android.graphics.Rect)' on a null object reference
E/AndroidRuntime(32149): 	at com.github.adee42.keyboardvisibility.KeyboardVisibilityPlugin.onGlobalLayout(KeyboardVisibilityPlugin.java:40)
E/AndroidRuntime(32149): 	at android.view.ViewTreeObserver.dispatchOnGlobalLayout(ViewTreeObserver.java:912)
E/AndroidRuntime(32149): 	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2150)
E/AndroidRuntime(32149): 	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1298)
E/AndroidRuntime(32149): 	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6437)
E/AndroidRuntime(32149): 	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:876)
E/AndroidRuntime(32149): 	at android.view.Choreographer.doCallbacks(Choreographer.java:688)
E/AndroidRuntime(32149): 	at android.view.Choreographer.doFrame(Choreographer.java:623)
E/AndroidRuntime(32149): 	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:862)
E/AndroidRuntime(32149): 	at android.os.Handler.handleCallback(Handler.java:754)
E/AndroidRuntime(32149): 	at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime(32149): 	at android.os.Looper.loop(Looper.java:163)
E/AndroidRuntime(32149): 	at android.app.ActivityThread.main(ActivityThread.java:6238)
E/AndroidRuntime(32149): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(32149): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:933)
E/AndroidRuntime(32149): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
I/Process (32149): Sending signal. PID: 32149 SIG: 9

[abhinavc]

Hi Danvick,
It seems that this issue was corrected by the publisher of `flutter_keyboard_visiblilty' about 2 days back.

https://github.com/adee42/flutter_keyboard_visibility/commit/981f6794718654cb30b36e403505fe1ff502205b

If you have a dependency on this plugin, then perhaps a update to pubspec.yaml is all that is needed. And if this be the issue, then can a hot-fix release be made available?

[abhinavc]

Right, flutter_form_builder depends on flutter_typeahead which depends on flutter_keyboard_visibility. Can I bypass the version included via your plugin and directly use the latest version of flutter_keyboard_visibility? I guess this is now more a question on how pubspec.yaml works

[danvick]

Thanks very much for the insight. The issue to do with flutter_keyboard_visibility had been reported but I didn't know exactly where the issue came from - and couldn't reproduce.

I obviously thought the one who reported the issue had the dependency on the plugin.

[danvick]

Hi @abhinavc,
Someone has reported that running flutter packages upgrade will sort that out.

Kindly confirm.

[abhinavc]

flutter packages upgrade should work as it would / should upgrade keyboard_visibility to version 0.5.6. But it didn't occur to me to do that. So, I simply made the following change in my pubspec.yaml and then ran flutter packages get (not upgrade)

dependency_overrides:
    keyboard_visibility: ^0.5.6

flutter packages upgrade would, I'm guessing, also upgrade every other package. Not sure if everyone would want that, lest it causes breaking behaviour

[danvick]

I see, thanks for the insight - very helpful.

We will then have that as the solution for the issue and close this issue.