Setting Android Version

in pubspec.yaml you can see this.

version: A.B.C+X
or for example
version: 1.0.0+1

What’s mean?

For Android:

A.B.C represents the versionName such as 1.0.0.

X (the number after the +) represents the versionCode such as 1, 2, 3, etc.

Do not forget to execute flutter build or flutter run after this step, because: When you run flutter build or flutter run after updating this version in the pubspec file, the versionName and versionCode in local.properties are updated which are later picked up in the build.gradle (app) when you build your flutter project using flutter build or flutter run which is ultimately responsible for setting the versionName and versionCode for the apk.

For iOS:

A.B.C represents the CFBundleShortVersionString such as 1.0.0.

X (the number after the +) represents the CFBundleVersion such as 1, 2, 3, etc.

Do not forget to execute flutter build or flutter run after this step.

Thanks for this share :

Flutter: upgrade the version code for play store