Firebase 设置后在 Android 上创建 Flutter APK 时出现问题

问题描述 投票：0回答：2

我正在 Flutter 中编写 Android 应用程序。最初，当我构建 APK 时，它在设备上正常运行。但是，在配置应用程序以使用 firebase 云消息（主要在 pubspec.yaml 和各种源 .dart 文件中）后，它构建的 APK 不起作用。

当我运行 flutter doctor 时，这是输出：


[!] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.10.0 Preview 1.0)
    • Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Preview
    • Visual Studio Community 2022 version 17.10.34607.79
    • The current Visual Studio installation is a pre-release version. It may not be supported by Flutter yet.
    X Visual Studio is missing necessary components. Please re-run the Visual Studio installer for the "Desktop development with C++" workload, and include these components:
        MSVC v142 - VS 2019 C++ x64/x86 build tools
         - If there are multiple build tool versions available, install the latest
        C++ CMake tools for Windows
        Windows 10 SDK

...

! Doctor found issues in 1 category.
Process finished with exit code 0

当我尝试 flutter pub 时得到：

Resolving dependencies...
  firebase_messaging 14.7.4 (14.7.19 available)
  http 1.2.0 (1.2.1 available)
  js 0.6.7 (0.7.1 available)
  leak_tracker 10.0.0 (10.0.4 available)
  leak_tracker_flutter_testing 2.0.1 (3.0.3 available)
  leak_tracker_testing 2.0.1 (3.0.1 available)
  material_color_utilities 0.8.0 (0.11.0 available)
  meta 1.11.0 (1.12.0 available)
  test_api 0.6.1 (0.7.0 available)
  vm_service 13.0.0 (14.1.0 available)
  web 0.4.2 (0.5.1 available)
Got dependencies!
11 packages have newer versions incompatible with dependency constraints.
Try `flutter pub outdated` for more information.
Process finished with exit code 0`

but when i try `flutter pub outdated` all seems good.

i checked all the files in the android folder and i saw that "GeneratedPluginRegistrant.java", 
"android\app\src\main\AndroidManifest.xml", "MainActivity.kt", "FlutterFirebaseMessagingPlugin.java" cannot resolve a lot of simbols.

尝试清理/修复 dart 缓存 --> 什么也没有

这些是我的项目中的文件：

  • android pp\src\main\AndroidManifest.xml:
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <application
        android:label="studioc5"
        android:name="${applicationName}"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
            <!-- Specifies an Android theme to apply to this Activity as soon as
                 the Android process has started. This theme is visible to the user
                 while the Flutter UI initializes. After that, this theme continues
                 to determine the Window background behind the Flutter UI. -->
            <meta-data
              android:name="io.flutter.embedding.android.NormalTheme"
              android:resource="@style/NormalTheme"
              />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>
    <!-- Required to query activities that can process text, see:
         https://developer.android.com/training/package-visibility?hl=en and
         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.

         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
    <queries>
        <intent>
            <action android:name="android.intent.action.PROCESS_TEXT"/>
            <data android:mimeType="text/plain"/>
        </intent>
    </queries>
</manifest>
  • 这是“GeneratePluginRegistrant.java”：

package io.flutter.plugins;

import androidx.annotation.Keep;
import androidx.annotation.NonNull;
import io.flutter.Log;

import io.flutter.embedding.engine.FlutterEngine;

/**
 * Generated file. Do not edit.
 * This file is generated by the Flutter tool based on the
 * plugins that support the Android platform.
 */
@Keep
public final class GeneratedPluginRegistrant {
  private static final String TAG = "GeneratedPluginRegistrant";
  public static void registerWith(@NonNull FlutterEngine flutterEngine) {
    try {
      flutterEngine.getPlugins().add(new io.flutter.plugins.firebase.core.FlutterFirebaseCorePlugin());
    } catch (Exception e) {
      Log.e(TAG, "Error registering plugin firebase_core, io.flutter.plugins.firebase.core.FlutterFirebaseCorePlugin", e);
    }
    try {
      flutterEngine.getPlugins().add(new io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPlugin());
    } catch (Exception e) {
      Log.e(TAG, "Error registering plugin firebase_messaging, io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPlugin", e);
    }
  }
}
  • 这是“app/build.graddle”：
plugins {
    id "com.android.application"
    id "kotlin-android"
    id "dev.flutter.flutter-gradle-plugin"
}

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

android {
    namespace "com.example.studioc5"
    compileSdk flutter.compileSdkVersion
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.studioc5"
        // You can update the following values to match your application needs.
        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
        minSdkVersion flutter.minSdkVersion
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {}
  • 这是 pubspec.yaml 中的依赖项：
  cupertino_icons: 1.0.6
  firebase_messaging: 14.7.4
  firebase_core: 2.27.0
  http: 1.2.0
  rounded_expansion_tile: 0.0.13
  • 这是main.dart（***替换真实数据）：
void main() async {
  await Firebase.initializeApp(
    options: const FirebaseOptions(
      apiKey: '***',
      appId: '***',
      messagingSenderId: '***',
      projectId: '***',
      storageBucket: '***',
    ));
  //   await Firebase.initializeApp(
  //     options: DefaultFirebaseOptions.currentPlatform,
  //
  // );
  runApp(const MyHomePage());
}
  • 这是 firebase_options.dart：
// File generated by FlutterFire CLI.
// ignore_for_file: lines_longer_than_80_chars, avoid_classes_with_only_static_members
import 'package:firebase_core/firebase_core.dart' show FirebaseOptions;
import 'package:flutter/foundation.dart'
    show defaultTargetPlatform, kIsWeb, TargetPlatform;

/// Default [FirebaseOptions] for use with your Firebase apps.
///
/// Example:
/// dart
/// import 'firebase_options.dart';
/// // ...
/// await Firebase.initializeApp(
///   options: DefaultFirebaseOptions.currentPlatform,
/// );
/// 
class DefaultFirebaseOptions {
  static FirebaseOptions get currentPlatform {
    if (kIsWeb) {
      throw UnsupportedError(
        'DefaultFirebaseOptions have not been configured for web - '
        'you can reconfigure this by running the FlutterFire CLI again.',
      );
    }
    switch (defaultTargetPlatform) {
      case TargetPlatform.android:
        return android;
      case TargetPlatform.iOS:
        return ios;
      case TargetPlatform.macOS:
        throw UnsupportedError(
          'DefaultFirebaseOptions have not been configured for macos - '
          'you can reconfigure this by running the FlutterFire CLI again.',
        );
      case TargetPlatform.windows:
        throw UnsupportedError(
          'DefaultFirebaseOptions have not been configured for windows - '
          'you can reconfigure this by running the FlutterFire CLI again.',
        );
      case TargetPlatform.linux:
        throw UnsupportedError(
          'DefaultFirebaseOptions have not been configured for linux - '
          'you can reconfigure this by running the FlutterFire CLI again.',
        );
      default:
        throw UnsupportedError(
          'DefaultFirebaseOptions are not supported for this platform.',
        );
    }
  }

  static const FirebaseOptions android = FirebaseOptions(***);

  static const FirebaseOptions ios = FirebaseOptions(***);
}

正如我所说，尝试修复/重置缓存，重新安装 android studio，创建一个新的 flutter 项目，尝试手动更改 pubspec.yaml 依赖项，重新安装 flutter sdk...没有任何效果。

android flutter firebase firebase-cloud-messaging flutter-dependencies
2个回答
0
投票

尝试：

flutter clean

然后：
flutter pub get
。 添加每个包后最好关闭应用程序并再次运行它，特别是与本机部分和设备资源密封的包。

0
投票

已解决：

void main() async {

  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );
  runApp(MyHomePage());

}
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