NoSuchMethodError: The method '[]' was called on null.

[blazvantur]

Hey.

I'm having trouble parsing my Flare file in the flutter: I get a weird error The method '[]' was called on null.

Flutter code:

child: FlareActor(
                    "resources/animations/animated_house.flr",
                    animation: "Enter transition",
                  ),

Stacktrace:

[ERROR:flutter/shell/common/shell.cc(184)] Dart Error: Unhandled exception:
    NoSuchMethodError: The method '[]' was called on null.
    Receiver: null
    Tried calling: [](0)
    #0      Object.noSuchMethod (dart:core/runtime/libobject_patch.dart:50:5)
    #1      JSONReader._readArrayOffset (package:flarecode/flare/json_reader.dart:59:22)
    #2      JSONReader.readFloat32ArrayOffset (package:flarecode/flare/json_reader.dart:45:10)
    #3      KeyFramePathVertices.read (package:flarecode/flare/animation/keyframe.dart:699:14)
    #4      PropertyAnimation.read (package:flarecode/flare/animation/actor_animation.dart:148:38)
    #5      ComponentAnimation.read (package:flarecode/flare/animation/actor_animation.dart:230:61)
    #6      ActorAnimation.read (package:flarecode/flare/animation/actor_animation.dart:422:30)
    #7      ActorArtboard.readAnimationsBlock (package:flarecode/flare/actor_artboard.dart:561:30)
    #8      ActorArtboard.read (package:flarecode/flare/actor_artboard.dart:310:11)
    #9      Actor.readArtboardsBlock (package:flarecode/flare/actor.dart:160:22)
    #10     Actor.load (package:flarecode/flare/actor.dart:139:11)
    #11     FlutterActor.loadFromBundle.<anonymous closure> (package:flarecode/flare.dart:507:13)
    #12     _RootZone.runUnary (dart:async/zone.dart:1379:54)
    #13     _FutureListener.handleValue (dart:async/future_impl.dart:129:18)
    #14     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45)
    #15     Future._propagateToListeners (dart:async/future_impl.dart:671:32)
    #16     Future._complete (dart:async/future_impl.dart:476:7)
    #17     _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
    #18     _AsyncAwaitCompleter.complete (dart:async/runtime/libasync_patch.dart:28:18)
    #19     _completeOnAsyncReturn (dart:async/runtime/libasync_patch.dart:295:13)
    #20     PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart)
    <asynchronous suspension>
    #21     FlutterActor.loadFromBundle (package:flarecode/flare.dart:506:16)
    <asynchronous suspension>
    #22     FlareActorRenderObject.filename= (package:flarecode/flare_actor.dart:208:13)
    #23     FlareActor.createRenderObject (package:flarecode/flare_actor.dart:44:9)
    #24     RenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4482:28)
    #25     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
    #26     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
    #27     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
    #28     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
    #29     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
    #30     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
    #31     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
    #32     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
    #33     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
    #34     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
    #35     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
    #36     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
    #37     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
    #38     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
    #39     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
    #40     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
    #41     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
    #42     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
    #43     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
    #44     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
    #45     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)

Flutter file:
https://www.2dimensions.com/a/bvantur/files/flare/animated-house-2/preview

Also, I have noticed that in preview door doesn't get opened as they get opened inside of a Flare editor. I have tried exporting .flr file as Binary and JSON format.

[luigi-rosso]

Thanks for reporting. I think this was due to an out of sync package on pub. We just published an update.

Make sure you're using the latest flare_flutter (^1.0.3) in your pubspec. You could also pub upgrade flare_flutter.

Let me know if that helps.

[blazvantur]

Thanks for the quick reply. I have tried your suggestion but with no luck. I'm now using ^1.0.3 version and I've also tried to update with pub upgrade but I'm stuck with the same error as before.

You can check the content of animated_house.flr file here: https://jsoneditoronline.org/?id=a3ec501c58264ad1b0149aa6444df17b
Is there maybe some operation that is not supported by flare_flutter package?

[luigi-rosso]

I see it works with the binary version now, it just looks like the json format is broken with the latest build. Please use that while we investigate this further!