v2 Android embedder plugins

[blackraven96]

Hi,

Is it possible to update your plugin for being compatible with v2 Android embedder plugins ?

Thx.

[ryanheise]

I believe it is possible, although it would be difficult at this stage.

The migration guide is limited, the Flutter team has so far updated only 2 of its 24 1st class plugins to demonstrate how to support v2, and unfortunately neither of those 2 happen to serve as demonstrative examples for plugins with background tasks.

As such, I would prefer to wait for at least one of their 1st class plugins to be updated that supports background tasks. e.g. android_alarm_manager.

Although, I would welcome a pull request from anyone who is motivated to figure it out from the API documentation.

There also may be a way to support legacy plugins as is (see #138) although again the documentation is a bit lacking at this stage.

[shubham-cueclad]

well than it seems i will have to wait for udates..Thanks a lot you were pretty supportive towards issues thanks again and all the best

[xster]

https://github.com/flutter/flutter/projects/59 is the first party migration state. Most of them are updated but you're right in that android_alarm_manager is the slight exception. We're still currently working on the set of best practices to recommend for users running in headless/background modes (flutter/flutter#32164).

[MickaelHrndz]

Does this mean that I can't use audio_service and android_alarm_manager together for now ?
In the same app, they work when used by themselves, but when I use audio_service in a background alarm and it goes off, this exception is thrown :

[ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method ready on channel ryanheise.com/audioServiceBackground)
E/flutter ( 7314): #0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:154:7)
E/flutter ( 7314): <asynchronous suspension>
E/flutter ( 7314): #1      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:329:12)
E/flutter ( 7314): #2      AudioServiceBackground.run (package:audio_service/audio_service.dart:813:30)
E/flutter ( 7314): #3      _AsyncAwaitCompleter.start (dart:async-patch/async_patch.dart:47:6)
E/flutter ( 7314): #4      AudioServiceBackground.run (package:audio_service/audio_service.dart:698:26)
...

The android_alarm_manager README says it supports v2 embedding with Flutter >= 1.12. I am on v1.13.6.
Is there a way to make it work while waiting for the package updates ?
Is this even related or should I open a new issue ?

[ryanheise]

I believe it is related to this issue, yes. Currently, it seems that those who created their projects pre-1.12 are having no issues (like myself), while those who created their projects post-1.12 are facing the problem. So the workaround for now is to use an old project template for your project.

I would ideally like documentation from the Flutter team since time is too short to spend figuring undocumented things out, but if that documentation doesn't come out within the next two weeks (or sooner) I will begin those efforts.

In terms of attracting more attention to this issue, these are the GitHub issues and Medium articles where I have left a comment already:

flutter/flutter#32164
flutter/flutter#47153
https://medium.com/flutter/executing-dart-in-the-background-with-flutter-plugins-and-geofencing-2b3e40a1a124

Simply upvoting/clapping those comments may help increase visibility.

[MickaelHrndz]

Thank you for your quick answer, I will try with an old project.
I upvoted and clapped.

[MickaelHrndz]

I tried with a Flutter 1.5.4 project, but unfortunately it didn't work.
PS : I am opening an unrelated issue on just_audio

[ryanheise]

Just to update this issue, I will have a crack at a v2 implementation this weekend.

[ryanheise]

I've just committed a v2 implementation to Git. Hopefully this doesn't break projects still using the old project template, but I would appreciate some feedback if anything is broken for both new and old-style projects.