Flutter环境基础配置插件flutter_environment_base的使用

简介

flutter_environment_base 是一个用于管理 Flutter 应用程序环境配置的插件。它可以帮助开发者轻松地在不同的环境中（如开发、测试、生产）切换配置，而无需修改代码。

使用步骤

1. 添加依赖

在 pubspec.yaml 文件中添加 flutter_environment_base 依赖：

dependencies:
  flutter:
    sdk: flutter
  flutter_environment_base: ^1.0.0  # 请根据实际版本替换

然后运行以下命令以安装依赖：

flutter pub get

2. 配置环境变量

在项目根目录下创建一个 .env 文件，并定义不同环境的配置。例如：

.env.development：

API_URL=http://dev-api.example.com
DEBUG=true

.env.production：

API_URL=http://prod-api.example.com
DEBUG=false

3. 初始化插件

在 main.dart 文件中初始化 flutter_environment_base 插件：

import 'package:flutter/material.dart';
import 'package:flutter_environment_base/flutter_environment_base.dart';

void main() async {
  // 初始化环境配置
  await FlutterEnvironmentBase.init(
    envFilePaths: ['.env.development', '.env.production'], // 定义环境文件路径
    activeEnvName: 'development', // 设置当前活动环境
  );

  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomeScreen(),
    );
  }
}

4. 访问环境变量

在代码中通过 FlutterEnvironmentBase 获取环境变量：

class HomeScreen extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    final apiUrl = FlutterEnvironmentBase.getString('API_URL');
    final debugMode = FlutterEnvironmentBase.getBool('DEBUG');

    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Environment Example'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text('API URL: $apiUrl'),
            Text('Debug Mode: ${debugMode ? 'Enabled' : 'Disabled'}'),
          ],
        ),
      ),
    );
  }
}

完整示例代码

以下是完整的示例代码：

import 'package:flutter/material.dart';
import 'package:flutter_environment_base/flutter_environment_base.dart';

void main() async {
  // 初始化环境配置
  await FlutterEnvironmentBase.init(
    envFilePaths: ['.env.development', '.env.production'],
    activeEnvName: 'development',
  );

  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomeScreen(),
    );
  }
}

class HomeScreen extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    final apiUrl = FlutterEnvironmentBase.getString('API_URL');
    final debugMode = FlutterEnvironmentBase.getBool('DEBUG');

    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Environment Example'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text('API URL: $apiUrl'),
            Text('Debug Mode: ${debugMode ? 'Enabled' : 'Disabled'}'),
          ],
        ),
      ),
    );
  }
}