编辑：-有趣的是，我的练习应用具有完全相同的代码，但显示了相同的控制台日志，但工作正常，但主应用（此应用）无法正常工作。
直到几个小时前，我的应用程序都可以正常工作，但是由于早上登录失败，出现此错误
E/flutter (24958): [ERROR:flutter/lib/ui/ui_dart_state.cc(166)] Unhandled Exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null)
Stackoverflow说要更改com.android.tools.build:gradle。我什至不碰代码，这是怎么突然发生的。
控制台：
W/ActivityThread( 1327): handleWindowVisibility: no activity for token android.os.BinderProxy@1796f22
V/ViewRootImpl( 1327): The specified message queue synchronization barrier token has not been posted or has already been removed
D/DecorView( 1327): onWindowFocusChangedFromViewRoot hasFocus: true, DecorView@d773c2a[SignInHubActivity]
D/DecorView( 1327): onWindowFocusChangedFromViewRoot hasFocus: true, DecorView@e79156a[MainActivity]
E/flutter ( 1327): [ERROR:flutter/lib/ui/ui_dart_state.cc(166)] Unhandled Exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null)
E/flutter ( 1327): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:572:7)
E/flutter ( 1327): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:161:18)
E/flutter ( 1327): <asynchronous suspension>
E/flutter ( 1327): #2 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:334:12)
E/flutter ( 1327): #3 MethodChannel.invokeMapMethod (package:flutter/src/services/platform_channel.dart:361:48)
E/flutter ( 1327): #4 MethodChannelGoogleSignIn.signIn (package:google_sign_in_platform_interface/src/method_channel_google_sign_in.dart:45:10)
E/flutter ( 1327): #5 GoogleSignIn._callMethod (package:google_sign_in/google_sign_in.dart:233:42)
E/flutter ( 1327): <asynchronous suspension>
E/flutter ( 1327): #6 GoogleSignIn._addMethodCall (package:google_sign_in/google_sign_in.dart:288:18)
E/flutter ( 1327): #7 GoogleSignIn.signIn (package:google_sign_in/google_sign_in.dart:359:9)
E/flutter ( 1327): #8 signInWithGoogle (package:opinion/services/google_sign_in.dart:8:71)
E/flutter ( 1327): #9 LoginButton.build.<anonymous closure> (package:opinion/components/login_button.dart:45:21)
E/flutter ( 1327): #10 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:992:19)
E/flutter ( 1327): #11 _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:1098:38)
E/flutter ( 1327): #12 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:184:24)
E/flutter ( 1327): #13 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:524:11)
E/flutter ( 1327): #14 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:284:5)
E/flutter ( 1327): #15 BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:219:7)
E/flutter ( 1327): #16 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:477:9)
E/flutter ( 1327): #17 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:78:12)
E/flutter ( 1327): #18 PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:124:9)
E/flutter ( 1327): #19 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:377:8)
E/flutter ( 1327): #20 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:122:18)
E/flutter ( 1327): #21 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:108:7)
E/flutter ( 1327): #22 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:220:19)
E/flutter ( 1327): #23 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:200:22)
E/flutter ( 1327): #24 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:158:7)
E/flutter ( 1327): #25 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:104:7)
E/flutter ( 1327): #26 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:88:7)
E/flutter ( 1327): #27 _rootRunUnary (dart:async/zone.dart:1206:13)
E/flutter ( 1327): #28 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter ( 1327): #29 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
E/flutter ( 1327): #30 _invoke1 (dart:ui/hooks.dart:267:10)
E/flutter ( 1327): #31 _dispatchPointerDataPacket (dart:ui/hooks.dart:176:5)
E/flutter ( 1327):
I/flutter ( 1327): null
答案 0 :(得分：1)
平台异常是因为firebase无法进行身份验证。尝试捕获错误并查看错误代码。
try {
[Firebase Login]
}
on PlatformException catch(error) {
print(error.code)
}
答案 1 :(得分：1)
这3行
V/ViewRootImpl( 1327): The specified message queue synchronization barrier token has not been posted or has already been removed
D/DecorView( 1327): onWindowFocusChangedFromViewRoot hasFocus: true, DecorView@d773c2a[SignInHubActivity]
D/DecorView( 1327): onWindowFocusChangedFromViewRoot hasFocus: true, DecorView@e79156a[MainActivity]
E/flutter ( 1327): [ERROR:flutter/lib/ui/ui_dart_state.cc(166)] Unhandled Exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null)
表明您的SHA1密钥有误。我认为由于新的Windows更新，您的计算机中的密钥已更改。只需生成一个新的并将其替换