android - 如何将 FlutterFire 与模拟器演示项目一起使用？

Question

我正在使用带有 demo project 的 firebase 模拟器，没有创建任何实际的 firebase 项目资源。我正在使用以下命令...

firebase emulators:start --project demo-test --only firestore

这在 localhost:8080 成功启动了一个 Firebase 模拟器实例。

然后我在我的 flutter 应用程序中连接到 firebase，如下所示...

await Firebase.initializeApp();
FirebaseFirestore.instance.settings = const Settings(
  host: 'localhost:8080',
  sslEnabled: false,
  persistenceEnabled: false,
);

运行 initializeApp 时，出现以下错误...

E/flutter ( 7724): [ERROR:flutter/lib/ui/ui_dart_state.cc(198)] Unhandled Exception: [core/not-initialized] Firebase has not been correctly initialized.
E/flutter ( 7724):
E/flutter ( 7724): Usually this means you've attempted to use a Firebase service before calling `Firebase.initializeApp`.
E/flutter ( 7724):
E/flutter ( 7724): View the documentation for more information: https://firebase.flutter.dev/docs/overview#initialization
E/flutter ( 7724):
E/flutter ( 7724): #0      MethodChannelFirebase.initializeApp
package:firebase_core_platform_interface/…/method_channel/method_channel_firebase.dart:113
E/flutter ( 7724): <asynchronous suspension>
E/flutter ( 7724): #1      Firebase.initializeApp
package:firebase_core/src/firebase.dart:40
E/flutter ( 7724): <asynchronous suspension>
E/flutter ( 7724): #2      _MyHomePageState._asyncInit
package:mobile_app/main.dart:53
E/flutter ( 7724): <asynchronous suspension>
E/flutter ( 7724):

Answer 1

我当前的应用程序具有扩展 InheritedWidget 的 AppConfig 类在使用时保持实例可用。

你可以试试

class AppConfig extends InheritedWidget {

    static AppConfig? of(BuildContext context) {
        initializeFirebase();
        return context.dependOnInheritedWidgetOfExactType<AppConfig>();
      }
    
    static Future<void> initializeFirebase() async {
        try {
          await Firebase.initializeApp();
        } catch (e) {}
      }
}

您需要在 main() 中初始化 AppConfig()