我最近升级了Flutter，今天我注意到，在连接物理Android设备时，系统可以识别，但设备列表卡在Loading...上，并且只有打开iOS Simulator或我安装的两个模拟器的选项，但是如果我启动仿真器，则无法选择运行该应用程序。
我尝试清理缓存以重新启动Android Studio，但没有帮助。
会发生什么，或者我能检查什么地方找到问题所在？
Flutter医生确实看到了电话面团。
[ +35 ms] [✓] Flutter (Channel master, 1.19.0-4.0.pre.73, on Mac OS X 10.13.6 17G65, locale it-IT)
[ +1 ms] • Flutter version 1.19.0-4.0.pre.73 at /Users/vinnytwice/Developer/flutter
[ ] • Framework revision 94b7ff241e (6 days ago), 2020-06-04 18:53:00 -0700
[ ] • Engine revision 859d892f1f
[ ] • Dart version 2.9.0 (build 2.9.0-13.0.dev 54adfeb93f)
⣽[ +73 ms] executing: pod --version
[ +4 ms] List of devices attached
3300f55e4cf61347 device usb:4250927104X product:a5xeltexx model:SM_A510F device:a5xelte transport_id:3
[ +25 ms] /Users/vinnytwice/Library/Android/sdk/platform-tools/adb -s 3300f55e4cf61347 shell getprop ⣻[ +52 ms] executing: /Users/vinnytwice/Library/Android/sdk/tools/bin/sdkmanager --licenses ⢿[ +123 ms] ro.hardware = samsungexynos7580 ⣟[ +990 ms] 1.8.1 [ +521 ms] [✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[ ] • Android SDK at /Users/vinnytwice/Library/Android/sdk
[ ] • Platform android-29, build-tools 29.0.2
[ ] • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
[ ] • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
[ ] • All Android licenses accepted.
[ +2 ms] [!] Xcode - develop for iOS and macOS (Xcode 10.2.1)
[ ] • Xcode at /Applications/Xcode.app/Contents/Developer
[ ] • Xcode 10.2.1, Build version 10E1001
[ ] ✗ Flutter requires a minimum Xcode version of 11.0.0.
[ ] Download the latest version or update via the Mac App Store.
[ ] • CocoaPods version 1.8.1
[ +2 ms] [✓] Chrome - develop for the web
[ ] • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[ +1 ms] [✓] Android Studio (version 3.5)
[ ] • Android Studio at /Applications/Android Studio.app/Contents
[ ] • Flutter plugin version 44.0.1
[ ] • Dart plugin version 191.8593
[ ] • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
[ +1 ms] [✓] Connected device (3 available)
[ ] • SM A510F • 3300f55e4cf61347 • android-arm • Android 7.0 (API 24)
[ ] • Web Server • web-server • web-javascript • Flutter Tools
[ ] • Chrome • chrome • web-javascript • Google Chrome 83.0.4103.97
[ ] ! Doctor found issues in 1 category.
[ +246 ms] executing: [/Users/vinnytwice/Developer/flutter/] git -c log.showSignature=false log -n 1 --pretty=format:%H
[ +69 ms] Exit code 0 from: git -c log.showSignature=false log -n 1 --pretty=format:%H
[ +1 ms] daddc914c7629ee00117cdffb724c5bee8cbe97d
[ +1 ms] executing: [/Users/vinnytwice/Developer/flutter/] git tag --contains HEAD
[ +300 ms] Exit code 0 from: git tag --contains HEAD
[ +5 ms] executing: [/Users/vinnytwice/Developer/flutter/] git describe --match *.*.*-*.*.pre --first-parent --long --tags
[ +32 ms] Exit code 0 from: git describe --match *.*.*-*.*.pre --first-parent --long --tags
[ ] 1.19.0-5.0.pre-57-gdaddc914c
[ +17 ms] executing: [/Users/vinnytwice/Developer/flutter/] git rev-parse --abbrev-ref --symbolic @{u}
[ +15 ms] Exit code 0 from: git rev-parse --abbrev-ref --symbolic @{u}
[ ] origin/master
[ ] executing: [/Users/vinnytwice/Developer/flutter/] git ls-remote --get-url origin
[ +14 ms] Exit code 0 from: git ls-remote --get-url origin
[ ] https://github.com/flutter/flutter.git
[ +94 ms] executing: [/Users/vinnytwice/Developer/flutter/] git rev-parse --abbrev-ref HEAD
[ +16 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD
[ ] master
[ +9 ms] executing: sw_vers -productName
[ +19 ms] Exit code 0 from: sw_vers -productName
[ ] Mac OS X
[ ] executing: sw_vers -productVersion
[ +18 ms] Exit code 0 from: sw_vers -productVersion
[ ] 10.13.6
[ ] executing: sw_vers -buildVersion
[ +19 ms] Exit code 0 from: sw_vers -buildVersion
[ +1 ms] 17G65
[ +68 ms] Artifact Instance of 'AndroidMavenArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[ +4 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ +29 ms] executing: /Users/vinnytwice/Library/Android/sdk/platform-tools/adb devices -l
[ +16 ms] executing: /usr/bin/xcode-select --print-path
[ +14 ms] Exit code 0 from: /usr/bin/xcode-select --print-path
[ ] /Applications/Xcode.app/Contents/Developer
[ +1 ms] executing: /usr/bin/xcodebuild -version
[ +160 ms] Exit code 0 from: /usr/bin/xcodebuild -version
[ ] Xcode 10.2.1
Build version 10E1001
[ +4 ms] Xcode not found. Run 'flutter doctor' for more information.
[ +66 ms] List of devices attached
[ +10 ms] Artifact Instance of 'AndroidMavenArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[ +2 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ +115 ms] No supported devices connected.
[ +72 ms] The following devices were found, but are not supported by this project:
Web Server • web-server • web-javascript • Flutter Tools
Chrome • chrome • web-javascript • Google Chrome 83.0.4103.97
If you would like your app to run on web, consider running `flutter create .` to generate projects for these platforms.
[ +25 ms] "flutter run" took 542ms.
[ +41 ms]
#0 throwToolExit (package:flutter_tools/src/base/common.dart:14:3)
#1 RunCommand.validateCommand (package:flutter_tools/src/commands/run.dart:337:7)
<asynchronous suspension>
#2 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:805:11)
<asynchronous suspension>
#3 FlutterCommand.run.<anonymous closure> (package:flutter_tools/src/runner/flutter_command.dart:722:33)
<asynchronous suspension>
#4 FlutterCommand.run.<anonymous closure> (package:flutter_tools/src/runner/flutter_command.dart)
#5 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:29)
#6 _rootRun (dart:async/zone.dart:1190:13)
#7 _CustomZone.run (dart:async/zone.dart:1093:19)
#8 _runZoned (dart:async/zone.dart:1630:10)
#9 runZoned (dart:async/zone.dart:1550:10)
#10 AppContext.run (package:flutter_tools/src/base/context.dart:149:18)
#11 FlutterCommand.run (package:flutter_tools/src/runner/flutter_command.dart:712:20)
#12 CommandRunner.runCommand (package:args/command_runner.dart:197:27)
#13 FlutterCommandRunner.runCommand.<anonymous closure> (package:flutter_tools/src/runner/flutter_command_runner.dart:332:21)
#14 _rootRunUnary (dart:async/zone.dart:1198:47)
#15 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#16 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#17 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#18 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#19 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#20 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:40:15)
#21 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:311:13)
#22 FlutterVersion.checkFlutterVersionFreshness (package:flutter_tools/src/version.dart)
#23 _rootRunUnary (dart:async/zone.dart:1198:47)
#24 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#25 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#26 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#27 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#28 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#29 Future._asyncCompleteWithValue.<anonymous closure> (dart:async/future_impl.dart:567:7)
#30 _rootRun (dart:async/zone.dart:1190:13)
#31 _CustomZone.run (dart:async/zone.dart:1093:19)
#32 _CustomZone.runGuarded (dart:async/zone.dart:997:7)
#33 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1037:23)
#34 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#35 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#36 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
#37 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:169:5)
[ +268 ms] ensureAnalyticsSent: 256ms
[ +2 ms] Running shutdown hooks
[ ] Shutdown hooks complete
[ +1 ms] exiting with code 1
答案 0 :(得分：0)
一个小时后，我遇到了完全相同的问题，我意识到新版本不支持并且存在一些错误。以下为我工作，
我去航站楼跑了：
$ flutter channel stable，它切换到branch stable，然后我运行flutter --version，它像以前一样下载，运行flutter Doctor，重新启动android studio。接下来要做的是转到“工具”>“ AVD管理器”并打开其中一个AVD。一旦启动，它将自动开始显示！希望这可以帮助！ :)继续编码！ ：D