flutter - 未解析的引用 : firebasemessaging

Question

收到此错误我已尝试修复此引用:Application.kt: Unresolved reference: firebasemessaging但没有工作，所以我需要再次发布我也尝试删除 application.kt 文件但没有工作。如果有人知道解决方案，请让我知道我做错了什么，这样我就可以学会不再重复这些

 ext.kotlin_version = '1.4.32'
    dependencies {
            classpath 'com.android.tools.build:gradle:3.6.4'
            classpath 'com.google.gms:google-services:4.3.3'
            classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        }




package com.godatu.dance

import io.flutter.app.FlutterApplication
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService

class Application : FlutterApplication(), PluginRegistry.PluginRegistrantCallback {

    override fun onCreate() {
        super.onCreate()
        FlutterFirebaseMessagingService.setPluginRegistrant(this)
    }

    override fun registerWith(registry: PluginRegistry?) {
        if (registry != null) {
            FirebaseCloudMessagingPluginRegistrant.registerWith(registry)
            FlutterLocalNotificationPluginRegistrant.registerWith(registry)
            FlutterPathProviderPluginRegistrant.registerWith(registry)
        }
    }

}


enter code here
   [   +2 ms] e: C:\Users\Admin\Desktop\Android\godatu-App\android\app\src\main\kotlin\com\godatu\dance\Application.kt: (6, 27): Unresolved reference: firebasemessaging
    [   +3 ms] e: C:\Users\Admin\Desktop\Android\godatu-App\android\app\src\main\kotlin\com\godatu\dance\Application.kt: (7, 27): Unresolved reference: firebasemessaging
    [        ] e: C:\Users\Admin\Desktop\Android\godatu-App\android\app\src\main\kotlin\com\godatu\dance\Application.kt: (12, 9): Unresolved reference: FlutterFirebaseMessagingService
    [        ] e: C:\Users\Admin\Desktop\Android\godatu-App\android\app\src\main\kotlin\com\godatu\dance\Application.kt: (20, 7): Redeclaration: FirebaseCloudMessagingPluginRegistrant
    [        ] e: C:\Users\Admin\Desktop\Android\godatu-App\android\app\src\main\kotlin\com\godatu\dance\Application.kt: (26, 13): Unresolved reference: FirebaseMessagingPlugin
    [        ] e: C:\Users\Admin\Desktop\Android\godatu-App\android\app\src\main\kotlin\com\godatu\dance\FirebaseCloudMessagingPluginRegistrant.kt: (5, 27): Unresolved reference: firebasemessaging
    [        ] e: C:\Users\Admin\Desktop\Android\godatu-App\android\app\src\main\kotlin\com\godatu\dance\FirebaseCloudMessagingPluginRegistrant.kt: (8, 7): Redeclaration: FirebaseCloudMessagingPluginRegistrant
    [        ] e: C:\Users\Admin\Desktop\Android\godatu-App\android\app\src\main\kotlin\com\godatu\dance\FirebaseCloudMessagingPluginRegistrant.kt: (17, 17): Unresolved reference: FirebaseMessagingPlugin
    [  +84 ms] FAILURE: Build failed with an exception.
    [        ] * What went wrong:
    [        ] Execution failed for task ':app:compileDebugKotlin'.
    [        ] > Compilation error. See log for more details
    [        ] * Try:
    [        ] Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
    [        ] * Get more help at https://help.gradle.org
    [        ] BUILD FAILED in 27s
    [        ] 399 actionable tasks: 5 executed, 394 up-to-date
    [{"event":"app.progress","params":{"appId":"82f5465d-087d-4b13-8c4a-7ae1698e399b","id":"0","progressId":null,"finished":true}}]
    [+5408 ms] Exception: Gradle task assembleDebug failed with exit code 1
    [   +4 ms] 
               #0      throwToolExit (package:flutter_tools/src/base/common.dart:10:3)
               #1      RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:550:9)
               <asynchronous suspension>
               #2      FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:1157:12)
               <asynchronous suspension>
               #3      FlutterCommand.run.<anonymous closure> (package:flutter_tools/src/runner/flutter_command.dart:1009:27)
               <asynchronous suspension>
               #4      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
               <asynchronous suspension>
               #5      AppContext.run (package:flutter_tools/src/base/context.dart:149:12)
               <asynchronous suspension>
               #6      CommandRunner.runCommand (package:args/command_runner.dart:197:13)
               <asynchronous suspension>
               #7      FlutterCommandRunner.runCommand.<anonymous closure> (package:flutter_tools/src/runner/flutter_command_runner.dart:278:9)
               <asynchronous suspension>
               #8      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
               <asynchronous suspension>
               #9      AppContext.run (package:flutter_tools/src/base/context.dart:149:12)
               <asynchronous suspension>
               #10     FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:234:5)
               <asynchronous suspension>
               #11     run.<anonymous closure>.<anonymous closure> (package:flutter_tools/runner.dart:64:9)
               <asynchronous suspension>
               #12     run.<anonymous closure> (package:flutter_tools/runner.dart:62:12)
               <asynchronous suspension>
               #13     AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
               <asynchronous suspension>
               #14     AppContext.run (package:flutter_tools/src/base/context.dart:149:12)
               <asynchronous suspension>
               #15     runInContext (package:flutter_tools/src/context_runner.dart:73:10)
               <asynchronous suspension>
               #16     main (package:flutter_tools/executable.dart:90:3)
               <asynchronous suspension>
    
    
    [{"event":"app.stop","params":{"appId":"82f5465d-087d-4b13-8c4a-7ae1698e399b"}}]
    [  +18 ms] "flutter run" took 36,338ms.
    [{"id":0,"error":"app '82f5465d-087d-4b13-8c4a-7ae1698e399b' not found","trace":"#0      AppDomain.stop (package:flutter_tools/src/commands/daemon.dart:698:7)\n#1      Domain.handleCommand.<anonymous closure> (package:flutter_tools/src/commands/daemon.dart:217:34)\n#2      new Future.sync (dart:async/future.dart:218:31)\n#3      Domain.handleCommand (package:flutter_tools/src/commands/daemon.dart:215:5)\n#4      Daemon._handleRequest (package:flutter_tools/src/commands/daemon.dart:141:28)\n#5      _rootRunUnary (dart:async/zone.dart:1362:47)\n#6      _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#7      _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#8      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#9      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#10     _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:123:11)\n#11     _MapStream._handleData (dart:async/stream_pipe.dart:218:10)\n#12     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:153:13)\n#13     _rootRunUnary (dart:async/zone.dart:1362:47)\n#14     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#15     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#16     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#17     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#18     _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:123:11)\n#19     _WhereStream._handleData (dart:async/stream_pipe.dart:195:12)\n#20     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:153:13)\n#21     _rootRunUnary (dart:async/zone.dart:1362:47)\n#22     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#23     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#24     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#25     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#26     _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)\n#27     _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)\n#28     _StringAdapterSink.add (dart:convert/string_conversion.dart:238:11)\n#29     _LineSplitterSink._addLines (dart:convert/line_splitter.dart:155:13)\n#30     _LineSplitterSink.addSlice (dart:convert/line_splitter.dart:130:5)\n#31     StringConversionSinkMixin.add (dart:convert/string_conversion.dart:163:5)\n#32     _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)\n#33     _rootRunUnary (dart:async/zone.dart:1362:47)\n#34     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#35     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#36     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#37     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#38     _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)\n#39     _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)\n#40     _StringAdapterSink.add (dart:convert/string_conversion.dart:238:11)\n#41     _StringAdapterSink.addSlice (dart:convert/string_conversion.dart:243:7)\n#42     _Utf8ConversionSink.addSlice (dart:convert/string_conversion.dart:317:20)\n#43     _Utf8ConversionSink.add (dart:convert/string_conversion.dart:310:5)\n#44     _ConverterStreamEventSink.add (dart:convert/chunked_conversion.dart:72:18)\n#45     _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)\n#46     _rootRunUnary (dart:async/zone.dart:1362:47)\n#47     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#48     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#49     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#50     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#51     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#52     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#53     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#54     _Socket._onData (dart:io-patch/socket_patch.dart:2144:41)\n#55     _rootRunUnary (dart:async/zone.dart:1370:13)\n#56     _CustomZone.runUnary (dart:async/zone.dart:1265:19)\n#57     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)\n#58     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)\n#59     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)\n#60     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)\n#61     _StreamController._add (dart:async/stream_controller.dart:607:7)\n#62     _StreamController.add (dart:async/stream_controller.dart:554:5)\n#63     new _RawSocket.<anonymous closure> (dart:io-patch/socket_patch.dart:1680:33)\n#64     _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1192:14)\n#65     _microtaskLoop (dart:async/schedule_microtask.dart:40:21)\n#66     _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)\n#67     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:120:13)\n#68     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:185:5)\n"}]

Answer 1

您不需要在 flutter v2 中照顾注册人。它会自己自动处理。因此您不需要包含 Application 类。