How to obfuscate Flutter apps?

Question

Flutter\'s wiki mentions obfuscation is an opt-in in release mode.
And yet, the flutter build command has no relevant option - see:
flutter he

Answer 1

For AppBundle:

Without splitting:

flutter build appbundle --obfuscate --split-debug-info=/

Splitting:

flutter build appbundle --target-platform android-arm,android-arm64,android-x64 --obfuscate --split-debug-info=/

---

For APK:

Without splitting:

flutter build apk --obfuscate --split-debug-info=/

Splitting:

flutter build apk --target-platform android-arm,android-arm64,android-x64 --split-per-abi --obfuscate --split-debug-info=/

Works only for Flutter version v1.16.2 or higher.

PS: About Splitting:
By default, fat apk contains arm v7, arm v8 and x64 which increases apk size, which you don't want to. So, when you split it, you have separate binaries which you can upload on the store and thus reducing the size of the apk that a user would need to download.