PS D:\Development\ULTIMAT POS\App POS Backup\UltimatePOS_Flutter_1.7.1\pos> flutter run Launching lib\main.dart on M2102J20SG in debug mode...

FAILURE: Build failed with an exception.

• Where: Build file 'D:\Development\ULTIMAT POS\App POS Backup\UltimatePOS_Flutter_1.7.1\pos\android\app\build.gradle' line: 50

• What went wrong: A problem occurred evaluating project ':app'.

Could not get unknown property 'minSdkVersion20' for extension 'flutter' of type FlutterExtension.

• 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 Running Gradle task 'assembleDebug'... 4.6s Exception: Gradle task assembleDebug failed with exit code 1

CodePudding user response：

Go to your App level build.gradle file in android folder and then change

minSdkVersion 20

to

minSdkVersion flutter.minSdkVersion

Hope it will solve your error

CodePudding user response：

try change minSdkVersion20 -> minSdkVersion 21 (add space before version)