How to fix flutter AndroidX incompatibility?

Question

I just import webview_flutter plugin and found that the plugin has incompatible with my flutter environment. Then using Android Studio I migrate my AndroidX environment with "Migrate to AndroidX" option.

I want to use webview_flutter plugin for viewing the page. Help appreciated.

Here is the error message

Launching lib/main.dart on Andromax B26D2H in debug mode...
D8: Program type already present: android.support.v4.media.MediaBrowserCompat$ItemCallback

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task
  ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.
  com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/22.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/105.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/148.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/133.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/72.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/128.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/79.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/88.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/110.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/67.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/120.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/91.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/102.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/6.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/118.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/5.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/52.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/58.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/43.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/127.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/142.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/151.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/19.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/34.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/46.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/63.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/107.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/9.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/31.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/15.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/115.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/70.jar, /Users/tio/Documents/Development/firecek_2019/build/app/intermediates/transforms/dexBuilder/debug/62.jar,
  Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes.
  Program type already present: android.support.v4.media.MediaBrowserCompat$ItemCallback

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 4m 59s ******************************************************************************************* The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.
See https://flutter.dev/docs/development/packages-and-plugins/androidx-compatibility for more information on the problem and how to fix it.

---

Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

Answer 1

Thanks for your suggestion,

I've fixed it by doing these steps : 1. Try adding this line In your Project folder > android > app > build.gradle, add the following Line in

multiDexEnabled true

inside defaultConfig

2. Then upgrade gradle dependency in the android/build.gradle file: classpath 'com.android.tools.build:gradle:3.3.1' (previously on version 3.2.1)

3. Run flutter clean and rebuild your project

Answer 2

First make sure that all your packages in the pubspec.yaml are of the latest version. Then open the android project of your flutter app with android studio, select Refactor->Migrate to Androidx(make sure that you are doing that that from the android project and not from the flutter one). Wait until android studio finishes migrating your project, rebuild your project. Hope it helps!