要执行 dart 版本，您可以使用 Platform 类直接返回 dart 版本，如本例所示：

import 'dart:io' show Platform;
var version = Platform.version;
print("version:"+version);

据我所知，没有直接的方法可以获取 flutter 版本，但您可以根据以下 CLI 命令创建自定义构建脚本以获取它：

flutter --version --machine

并使用其输出在构建时创建一个 dart 文件，我们可以将其导入到项目中。一旦到达那里，我们就可以在运行时直接读取它。

因此，我们将制作以下构建脚本来创建 dart 文件（名为 flutterVersion.dart）：

rm lib/src/flutterVersion.dart # <-- prevents appending to an old file.
echo "Building flutterVersion.dart"

### the following creates a dart file, and appends the output of 
### <flutter --version --machine> to a Map variable named "version", 
### and finally appends a semicolon at the end.

echo "const Map<String,String> version = " >> lib/src/flutterVersion.dart
flutter --version --machine >> lib/src/flutterVersion.dart
echo ";" >> lib/src/flutterVersion.dart

echo "Continuing flutter build"
// put other build commands here.

这将创建以下文件：

const Map<String,String> version = 
{
  "frameworkVersion": "1.15.19-pre.9",
  "channel": "master",
  "repositoryUrl": "https://github.com/flutter/flutter.git",
  "frameworkRevision": "e13e17009dcb009f12335eb281f7295ba42de771",
  "frameworkCommitDate": "2020-03-06 21:38:35 -0800",
  "engineRevision": "5aff3119480996ca014ec0f8d26d74db617b5852",
  "dartSdkVersion": "2.8.0 (build 2.8.0-dev.12.0 9983424a3c)"
};

然后，您只需导入该文件并在运行时读取它：

import 'package:my_package/src/flutterVersion.dart';

main() {
  print(version['channel']);
  print(version['frameworkVersion']);
}

//output: 
//master
//1.15.19-pre.9

我将 William Terril 的解决方案改编为 dart 脚本。

import 'dart:io' show Process, ProcessResult;
import 'dart:convert' show json;

void main() {
  Process.run('flutter', ['--version', '--machine']).then(
    (ProcessResult results) {
      final result = Map<String, Object>.from(
        json.decode(results.stdout.toString()) as Map,
      );
      print(constantDeclarationsFromMap(result, 'kFlutter'));
    },
  );
}

String constantDeclarationsFromMap(Map<String, Object> map,
    [String prefix = 'k']) {
  String _capitalize(String text) =>
      text.isEmpty ? text : "${text[0].toUpperCase()}${text.substring(1)}";

  String _constantName(String name, String prefix) =>
      prefix.isEmpty ? name : prefix + _capitalize(name);

  return map.entries
      .map((e) =>
          'const ${_constantName(e.key, prefix)} = ${json.encode(e.value)};')
      .join('\n');
}

然后运行类似 dart get_flutter_info.dart > flutter_info.dart 的程序，我将获得如下所示的文件：

const kFlutterChannel = "beta";
const kFlutterDartSdkVersion = "2.9.0 (build 2.9.0-21.10.beta)";
const kFlutterEngineRevision = "d6ee1499c27a156a797d9f1539ffb7892855c1d0";
const kFlutterFrameworkCommitDate = "2020-08-01 09:01:12 -0700";
const kFlutterFrameworkRevision = "916c3ac648aa0498a70f32b5fc4f6c51447628e3";
const kFlutterFrameworkVersion = "1.20.0";
const kFlutterRepositoryUrl = "https://github.com/flutter/flutter.git";

因此，您可以利用类型和自动完成功能。我希望有一种很好的方法将此代码注入构建过程。