minSdkVersion 16 cannot be smaller than version 21 declared in library [:square_in_app_payments]

[tonydiaz]

Describe your question

Using square_in_app_payments: ^1.2.3 in my app I see this error. I notice that when creating a new flutter app the minSdkVersion is set to 16.

Error

<app_name>/android/app/src/debug/AndroidManifest.xml Error:
	uses-sdk:minSdkVersion 16 cannot be smaller than version 21 declared in library [:square_in_app_payments] <app_name>/build/square_in_app_payments/intermediates/merged_manifests/debug/processDebugManifest/merged/AndroidManifest.xml as the library might be using APIs not available in 16
	Suggestion: use a compatible library with a minSdk of at most 16,
		or increase this project's minSdk version to at least 21,
		or use tools:overrideLibrary="sqip.flutter" to force usage (may lead to runtime failures)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : uses-sdk:minSdkVersion 16 cannot be smaller than version 21 declared in library [:square_in_app_payments] <app_name>/build/square_in_app_payments/intermediates/merged_manifests/debug/processDebugManifest/merged/AndroidManifest.xml as the library might be using APIs not available in 16
  	Suggestion: use a compatible library with a minSdk of at most 16,
  		or increase this project's minSdk version to at least 21,
  		or use tools:overrideLibrary="sqip.flutter" to force usage (may lead to runtime failures)

* 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 3s
Finished with error: Gradle task assembleDebug failed with exit code 1

After updating build.gradle to use minSdkVersion 21

I did update the build.gradle file use version 21 then I saw new errors 😞

D8: Program type already present: android.support.v4.os.ResultReceiver$1

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: 
<app_name>/build/app/intermediates/transforms/dexBuilder/debug/0.jar
<app_name>/build/app/intermediates/transforms/dexBuilder/debug/1.jar
<app_name>/build/app/intermediates/transforms/dexBuilder/debug/2.jar
<app_name>/build/app/intermediates/transforms/dexBuilder/debug/3.jar
<app_name>/build/app/intermediates/transforms/dexBuilder/debug/4.jar
<app_name>/build/app/intermediates/transforms/dexBuilder/debug/5.jar
<app_name>/build/app/intermediates/transforms/dexBuilder/debug/6.jar
<app_name>/build/app/intermediates/transforms/dexBuilder/debug/7.jar
...

  Program type already present: android.support.v4.os.ResultReceiver$1
  Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes.

* 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 10s
*******************************************************************************************
The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.
See https://goo.gl/CP92wY for more information on the problem and how to fix it.
*******************************************************************************************
Finished with error: Gradle task assembleDebug failed with exit code 1

[tonydiaz]

@StephenJosey 👋

[okenshields]

Hi Tony, the new error might be AndroidX related. Can you try this? https://flutter.dev/docs/development/androidx-migration

[tonydiaz]

@okenshields Thanks! It corrected my problem. Closing this issue.