Error in R8 Program type already present, when compiling the app

user_7082850 0
Viewed 2523

I'm trying to compile the APK for Flutter, but I'm getting an error in r8. I already have other apps in Flutter, but I never had a problem compiling and making the tests with them. I realize that the problem is the WebView library because when I remove it from the pubspec the app compiles. But I can't discard the use of the WebView at the moment, it is important for the app. The strange thing is that I can debug the app on the device.

I've tried several solutions like the ones below:

gradlew clean in project-flutter / android
flutter clean

And the following steps:

  • Updated to the latest version of webview dependency in the pub spec.
  • I have already switched to the flutter master channel.
  • Also performed the flutter upgrade but nothing solves the problem.

I get the following error:

R8: Program type already present: io.flutter.plugins.webviewflutter.BuildConfig

FAILURE: Build failed with an exception.

What went wrong:

Execution failed for task ':app:transformClassesAndResourcesWithR8ForRelease'. com.android.tools.r8.CompilationFailedException: Compilation failed to complete

ref r8: https://developer.android.com/studio/build/shrink-code?hl=pt-br

android-r8 flutter webview android
6 Answers

Found out the answer, you can remove the webview_flutter from your pubspec.yaml, so you just use youtube_player_flutter on your pubspec.yaml. You still can use the webview with all the functionality from webview_flutter with import 'package:webview_media/webview_flutter.dart'; on the dart file that using the webview.

user_91672340

As the message indicate the class io.flutter.plugins.webviewflutter.BuildConfig is present twice in the input. You will need to track down the two dependencies which have this class.

You can use

./gradlew app:dependencies

and

./gradlew app:androidDependencies

to get information on all dependencies. Then you need to figure out how to avoid one of these dependencies.

user_24186420

I got this problem cause youtube_player_flutter and flutter_html were using the same dependency flutter_webview.

I used this and work like a charm

  • flutter_html: ^1.0.0
  • webview_flutter: ^0.3.19+5
  • youtube_player_flutter: 6.0.3+2
user_81089910
user_120381750

Working for me. Just update the packages of both youtube_player_flutter and webview_flutter. After that use both flutter clean and flutter packages get commands to solve this issue.

user_100668160

I had the same issue using webview_flutter and youtube_player_flutter. I used the solution by @srinivasanrsp on Github. It works.

The problem: youtube_player_flutter uses the webview to play the videos from Youtube. so you are (unknowingly) trying to import and use the same package.

Solution:

  • Remove the webview_flutter package from the pubspec.yaml file
  • Use import 'package:webview_media/webview_flutter.dart' as your webview.; This works just fine.
user_135625400
Related