Flutter - Set target file base on Android product flavors

Question

Currently I am using Flutter to build my application.

Background

I have followed some guide on building different environments entry files:
https://iirokrankka.com/2018/03/02/separating-build-environments/
which create main_dev.dart and main_prod.dart.

Also I have learnt to build flavor for both iOS and Android: https://medium.com/@salvatoregiordanoo/flavoring-flutter-392aaa875f36
which now I can use --flavor <FLAVOR> in the command to build different flavor application.

Now I have encountered a problem when I try to combine two skills.

---

Target Result

Below is what I would like to achieve:

development flavor -> main_dev.dart entry file
production flavor -> main_prod.dart entry file

---

Problem Encounter

in iOS side, I can target the entry file in .xcconfig file like following:

// ios/Flutter/development.xcconfig

#include "Generated.xcconfig"

FLUTTER_TARGET=lib/main_dev.dart

I know I can add -t lib/main_dev.dart after flutter run command.
However I would like to ask if there is any solution to set
the flutter target file in Android side inside flavor config?

Appreciate for any help.

Answer 1

I would like to ask if there is any solution to set the flutter target file in Android side inside flavor config?

I don't know the equal of FLUTTER_TARGET for Android flavor. I would to like to learn that too.

But, flutter run -t is not the only option here. When you open a Flutter project (the root project) with Android Studio you will have a default run/debug configuration like below:

When you click Edit Configurations below screen will appear:

There you can set Build flavor and Dart entrypoint. Obviously, you can create multiple configurations for each flavor.

Reference: https://cogitas.net/creating-flavors-of-a-flutter-app/

So, that's a solution for Flutter in Android Studio. For VSCode, I have a workaround. I'm using -t parameter. But I have it automated by VSCode. Under .vscode/launch.json I have configurations like below:

"configurations": [
        {
            "name": "GoodOne",
            "request": "launch",
            "type": "dart",
            "args": ["--flavor",
                "good",
                "-t",
                "./lib/main-good.dart"
            ]
        },
        {
            "name": "BadOne",
            "request": "launch",
            "type": "dart",
            "args": ["--flavor",
                "bad",
                "-t",
                "./lib/main-bad.dart"
            ]
        }
]

With this, you can run your flavors by just pressing F5 and choose your config at the upper-left corner.

Again, this is not an exact answer to OP's question, but some workarounds.