在 flutter 中构建 Android 时出现“错误：找不到符号”

Question

当我尝试在我的 flutter 应用程序中构建 android 时，我不断收到此错误。这一切都是在我添加时发生的firebase messaging version 7.0.3。即使删除它后，这个问题仍然存在。

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/Users/bright/Desktop/flutter_apps/rush_user_app/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java:20: error: cannot find symbol\n    flutterEngine.getPlugins().add(new io.flutter.plugins.flutter_plugin_android_lifecycle.FlutterAndroidLifecyclePlugin());\n                                                                                          ^\n  symbol:   class FlutterAndroidLifecyclePlugin                         \n  location: package io.flutter.plugins.flutter_plugin_android_lifecycle \n/Users/bright/Desktop/flutter_apps/rush_user_app/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java:24: error: cannot find symbol\n    flutterEngine.getPlugins().add(new io.flutter.plugins.googlemaps.GoogleMapsPlugin());\n                                                                    ^   \n  symbol:   class GoogleMapsPlugin                                      \n  location: package io.flutter.plugins.googlemaps                       \n/Users/bright/Desktop/flutter_apps/rush_user_app/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java:25: error: cannot find symbol\n    flutterEngine.getPlugins().add(new io.flutter.plugins.googlesignin.GoogleSignInPlugin());\n                                                                      ^ \n  symbol:   class GoogleSignInPlugin                                    \n  location: package io.flutter.plugins.googlesignin                     \n/Users/bright/Desktop/flutter_apps/rush_user_app/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java:26: error: cannot find symbol\n    flutterEngine.getPlugins().add(new io.flutter.plugins.imagepicker.ImagePickerPlugin());\n                                                                     ^  \n  symbol:   class ImagePickerPlugin                                     \n  location: package io.flutter.plugins.imagepicker                      \n/Users/bright/Desktop/flutter_apps/rush_user_app/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java:30: error: cannot find symbol\n    flutterEngine.getPlugins().add(new io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin());\n                                                                           ^\n  symbol:   class SharedPreferencesPlugin                               \n  location: package io.flutter.plugins.sharedpreferences                \n5 errors  \nRunning Gradle task \'assembleDebug\'... Done                       102.9s\nException: Gradle task assembleDebug failed with exit code 1\n

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这是我的GeneratedPluginRegistrant.java

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package io.flutter.plugins;\n\nimport androidx.annotation.Keep;\nimport androidx.annotation.NonNull;\n\nimport io.flutter.embedding.engine.FlutterEngine;\nimport io.flutter.embedding.engine.plugins.shim.ShimPluginRegistry;\n\n/**\n * Generated file. Do not edit.\n * This file is generated by the Flutter tool based on the\n * plugins that support the Android platform.\n */\n@Keep\npublic final class GeneratedPluginRegistrant {\n  public static void registerWith(@NonNull FlutterEngine flutterEngine) {\n    ShimPluginRegistry shimPluginRegistry = new ShimPluginRegistry(flutterEngine);\n    flutterEngine.getPlugins().add(new io.flutter.plugins.flutter_plugin_android_lifecycle.FlutterAndroidLifecyclePlugin());\n    flutterEngine.getPlugins().add(new io.github.ponnamkarthik.toast.fluttertoast.FlutterToastPlugin());\n    flutterEngine.getPlugins().add(new com.baseflow.geolocator.GeolocatorPlugin());\n    flutterEngine.getPlugins().add(new com.baseflow.googleapiavailability.GoogleApiAvailabilityPlugin());\n    flutterEngine.getPlugins().add(new io.flutter.plugins.googlemaps.GoogleMapsPlugin());\n    flutterEngine.getPlugins().add(new io.flutter.plugins.googlesignin.GoogleSignInPlugin());\n    flutterEngine.getPlugins().add(new io.flutter.plugins.imagepicker.ImagePickerPlugin());\n      com.codeheadlabs.libphonenumber.LibphonenumberPlugin.registerWith(shimPluginRegistry.registrarFor("com.codeheadlabs.libphonenumber.LibphonenumberPlugin"));\n    flutterEngine.getPlugins().add(new com.lyokone.location.LocationPlugin());\n    flutterEngine.getPlugins().add(new com.baseflow.location_permissions.LocationPermissionsPlugin());\n    flutterEngine.getPlugins().add(new io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin());\n    flutterEngine.getPlugins().add(new com.aboutyou.dart_packages.sign_in_with_apple.SignInWithApplePlugin());\n  }\n}\n\n

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这是我的 android 文件夹结构

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我尝试用谷歌搜索解决方案，但没有找到与我的问题类似的任何建议。这是我的颤振医生输出

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[\xe2\x9c\x93] Flutter (Channel stable, 1.22.5, on Mac OS X 10.15.4 19E287 darwin-x64, locale en-KE)\n[!] Android toolchain - develop for Android devices (Android SDK version 29.0.3)\n    \xe2\x9c\x97 Android license status unknown.\n      Run `flutter doctor --android-licenses` to accept the SDK licenses.\n      See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.\n \n[\xe2\x9c\x93] Xcode - develop for iOS and macOS (Xcode 11.5)\n[\xe2\x9c\x93] Android Studio (version 3.6)\n[\xe2\x9c\x93] VS Code (version 1.53.2)\n[\xe2\x9c\x93] Connected device (1 available)\n\n! Doctor found issues in 1 category.\n

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这是我的依赖项

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dependencies:\n  flutter:\n    sdk: flutter\n  carousel_slider: ^2.3.1\n  intl_phone_number_input: ^0.5.2+2\n  pinput: ^0.2.6\n  cupertino_icons: ^1.0.0\n  dotted_border: ^1.0.6\n  dotted_line: ^2.0.2\n  date_field: ^1.0.5\n  intl: ^0.16.1\n  image_picker: ^0.6.7+22\n  flutter_rating_bar: ^3.2.0+1\n  signature: ^3.2.0\n  scrollable_positioned_list: ^0.1.9\n  http: ^0.12.1\n  shared_preferences: ^0.5.12+4\n  provider: null\n  google_maps_flutter: ^1.2.0\n  location: ^3.2.4\n  geolocator: ^5.3.2+2\n  shimmer: ^1.1.2\n  flutter_google_places: ^0.2.6\n  google_maps_webservice: ^0.0.19\n  fluttertoast: ^7.1.6\n  flutter_polyline_points: ^0.2.4\n  uuid: null\n  google_sign_in: ^4.5.9\n  sign_in_with_apple: ^2.5.4\n  firebase_messaging: ^7.0.3\n

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我尝试迁移到新项目并仅传输 lib、ios 和 pubspec.yaml，但错误仍然存​​在。\n请帮忙！

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Answer 1

对我来说，我总是尝试清理颤振构建：

flutter clean

Answer 2

经过一场大汗淋漓的斗争后，我决定从我得到的无数搜索结果中尝试随机解决方案，瞧

flutter pub cache repair

Answer 3

就我而言，我尝试过

flutter clean
flutter pub cache repair
flutter pub get

但没有任何积极的结果，所以我转到位于的应用程序级别 build.gradleandroid/app/build.gradle文件并更改了...SdkVersion值：

    android {
        compileSdkVersion 33  // was `flutter.compileSdkVersion`
    }

    defaultConfig {
        minSdkVersion 29 // was `flutter.minSdkVersion`
        targetSdkVersion 33 // was `flutter.targetSdkVersion`
    }

Answer 4

赶紧跑

flutter clean
flutter build

我遇到了同样的问题，这个有帮助。

Answer 5

通过运行以下两个命令修复了我的问题

flutter clean
flutter pub get

Answer 6

您必须已从文件pubspec.yml中分离插件。

缓存需要清理。

flutter clean
flutter pub cache repair
flutter pub get