Program type already present: android.support.v4.o

问题:

i'm building app with ionic i have add firebase cloud message, everything work fine But today, when i build that show error.

1. ionic cordova platform rm android
2. remove plugins
3. clear & clean cache
4. remove package-lock.js
5. npm i 6 ionic cordova platform add android 7 ionic cordova prepare 8 ionic cordova build android

Task :app:transformDexArchiveWithExternalLibsDexMergerForDebug FAILED 37 actionable tasks: 7 executed, 30 up-to-date D8: Program type already present: android.support.v4.os.ResultReceiver$MyResultReceiver

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: Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes. Program type already present: android.support.v4.os.ResultReceiver$MyResultReceiver

• 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 18s /////*/platforms/android/gradlew: Command failed with exit code 1 Error output: D8: Program type already present: android.support.v4.os.ResultReceiver$MyResultReceiver

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: Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes. Program type already present: android.support.v4.os.ResultReceiver$MyResultReceiver

回答1:

I had the same issue, and found out it was because of the firebase and googleplus plugins. Finally found a solution that worked for me :

ionic cordova plugin add cordova-plugin-androidx
ionic cordova plugin add cordova-plugin-androidx-adapter

Simply adding these plugins removed any build error.