Build Android:
minsdkVersion Problem.
https://stackoverflow.com/questions/52060516/flutter-how-to-change-android-minsdkversion-in-flutter-project/70452027#70452027
 flutter-directory/packages/flutter_tools/gradle/src/main/groovy/flutter.groovy. And the default minSdkVersion = 19.

/snap/flutter/common/flutter/packages/flutter_tools/gradle$
class FlutterExtension {
    /** Sets the compileSdkVersion used by default in Flutter app projects. */
    static int compileSdkVersion = 31

    /** Sets the minSdkVersion used by default in Flutter app projects. */
    static int minSdkVersion = 23

    /** Sets the targetSdkVersion used by default in Flutter app projects. */
    static int targetSdkVersion = 31



https://github.com/flutter/flutter/issues/156304
von Version 21 auf Verson 17 Java


bei isar 21 Problemen
in der android/app/src/main/AndroidManifest.xml

    <uses-sdk tools:overrideLibrary="dev.isar.isar_flutter_libs"/>


 Google Playstore hochladen Nammensprobleme:
 appname durch .app ersetzen

 com.example
 glencoe.lordvon
 android/app/src/mainkotlin/domain/mainActivity.kt
 package glencoe.lordvon.app

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