[1.5.0] Animation not rendering correctly on certain devices in release mode

[bbedward]

Hi,

I recently started testing our app on a Galaxy J3 Luna Pro, Android 6.0.1, model is SM-S327VL - it's a 32-bit arm device.

Flutter doctor output:

[✓] Flutter (Channel stable, v1.5.4-hotfix.2, on Mac OS X 10.14.1 18B75, locale en-US)
    • Flutter version 1.5.4-hotfix.2 at /Users/bb/flutter/flutter
    • Framework revision 7a4c33425d (10 days ago), 2019-04-29 11:05:24 -0700
    • Engine revision 52c7a1e849
    • Dart version 2.3.0 (build 2.3.0-dev.0.5 a1668566e5)

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at /Users/bb/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
    • All Android licenses accepted.

[✓] Android Studio (version 3.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 31.3.1
    • Dart plugin version 181.5656
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[✓] Connected device (2 available)
    • SM S327VL     • ce07d026 • android-arm   • Android 6.0.1 (API 23)
    • ONEPLUS A6013 • bd101760 • android-arm64 • Android 9 (API 28)

Some of the animations we've been using in our app are not rendering correctly, here's one example:

It stays as a static image like that, and animates in and out of 0-opacity

The animation is here: https://www.2dimensions.com/a/yekta/files/flare/natrium-welcome-animation

And we're simply using a FlareActor to render it:

FlareActor(
  "assets/welcome_animation.flr",
  animation: "main",
  fit: BoxFit.contain,
  color: StateContainer.of(context)
      .curTheme
      .primary,
),

Full source code is available at: https://github.com/appditto/natrium_wallet_flutter/blob/master/lib/ui/intro/intro_welcome.dart

The animation is rendering correctly on all the other devices that we have personally tested (OnePlus 6T, Pixel 2/3, iPhone 5S, iPhone 7, etc.) This is the only lower-end, 32-bit device we have to test with and it exhibits this issue.

This only occurs in release mode, and there's no errors reported anywhere in the logs.

Thanks

[umberto-sonnino]

Thanks for reporting, we'll try to look into it.
There was a Flutter bug reported a while back, that's been fixed since, this might a regression of it.

[bach942]

We are actually having the same issue. This only occurs on Android devices and only when in release mode (I've actually seen this on the emulator also). This started happening when we updated to the latest stable version of flutter (Never try releases during Google I/O).

What I've been able to figure out is that the animation seems to fade out, the large white diamonds (which we don't do in flare) and then you never see it again. We have one .flr file that has two animations on it. The first is normal then at the end of it, it fades out and the second animation never shows the large white diamonds. We are not doing anything special except using the completed callback to move to the next animation (that loops) calling set state.
Our environment:

[✓] Flutter (Channel stable, v1.5.4-hotfix.2, on Mac OS X 10.14.4 18E226, locale en-US)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] iOS toolchain - develop for iOS devices (Xcode 10.2.1)
[✓] Android Studio (version 3.4)
[✓] Connected device (2 available)

The build command:

flutter build apk -t lib/main_test.dart --release

The widget build:

@override
  Widget build(BuildContext context) {
    return Container(
      height: widget.height,
      width: widget.width,
      child: FlareActor(
        'assets/animations/Constellation_Reflect.flr',
        alignment: Alignment.center,
        fit: BoxFit.contain,
        animation: 'ConstellationBuildIn',
        callback: (currentAnimationName) {
          if (currentAnimationName == 'ConstellationBuildIn') {
            setState(() {
              _animationName = 'ConstellationLoop';
            });
          }
        },
      ),
    );
  }

The images of what it should look like and what it looks like when it's faded out (missing the large diamonds):

[luigi-rosso]

@bach942 could you post the link to your file on 2dimensions.com? If it's a private file, could you email me a downloaded copy at luigi@2dimensions.com?

[bach942]

@luigi-rosso I've emailed you the .flr file that we are using.

[luigi-rosso]

Thanks @bach942. Both of the files referenced in the issue are working on the Samsung S8 we're currently testing with (in both debug and release). I'll get my hands on a Nokia 6 a little later today and test there too.

[bach942]

@luigi-rosso hopefully this helps.. I was able to check our CI pipeline and narrow down when the issue started.. When everything worked we were on version v1.2.1 of flutter. Then 3 days ago v1.5.4-hotfix.2 was pushed to the stable branch and caused the issue to appear.

In our CI we had been downloading and installing 1.2.1 then running flutter upgrade (Which never had a change until then). This was the first time a new version was pushed to stable.

The list of flutter SDKs:
https://flutter.dev/docs/development/tools/sdk/releases

[bach942]

@luigi-rosso so I was able to use our current code with current versions of packages. flare_flutter v1.5.0 with flutter stable 1.2.1 and the issue disappeared (Which confirms somehow the latest stable version of flutter 1.5.4-hotfix-2 is causing the issue). I think I'll have to find out now from 1.2.1...1.5.4-hotfix-2 flutter version which caused the issue.

[artur-ios-dev]

I am having the same issue with my Wallet animation - https://www.2dimensions.com/a/artrmz/files/flare/wallet/preview

The body and bills are not visible in release mode on Android. So seems like some rectangles are not rendering properly.

Flutter: 1.5.4-hotfix-2
flare_flutter: 1.5.0
Devices: Huawei P8 Lite (tested on some other Huawei and had some issue as well, can't remember the model though)

[luigi-rosso]

Sounds like the Flutter team cannot reproduce this on v1.6.1-pre.80:
flutter/flutter#32708 (comment)

Could someone with one of the devices exhibiting this problem give it a try? @artrmz @bach942 @bbedward @grandpa-guru

[luigi-rosso]

Nevermind! They confirmed it's only reproduces on 32bit ARM.

[localpcguy]

I was seeing this on 64bit ARM devices (both on a Pixel XL and a Pixel 3). I work with @bach942 so it is the same file and code sample that was submitted earlier. cc: @luigi-rosso

[rodydavis]

I have this same issue but just for Android and just for release mode. Happens on 64-bit devices too

[artur-ios-dev]

@AppleEducate It will be fixed once Flutter hits another stable version.

[rodydavis]

Ok cool 😎