如何修复“ Gradle构建无法产生Android捆绑包”。在Flutter

Question

运行 flutter build appbundle时，出现以下错误：Gradle构建无法生成Android捆绑包。

在详细模式下运行时，这是我另外得到的：

#0      throwToolExit (package:flutter_tools/src/base/common.dart:24:3)
#1      _buildGradleProjectV2 (package:flutter_tools/src/android/gradle.dart:585:7)
<asynchronous suspension>
#2      buildGradleProject (package:flutter_tools/src/android/gradle.dart:331:14)
<asynchronous suspension>
#3      buildAppBundle (package:flutter_tools/src/android/app_bundle.dart:43:10)
<asynchronous suspension>
#4      BuildAppBundleCommand.runCommand (package:flutter_tools/src/commands/build_appbundle.dart:43:11)
<asynchronous suspension>
#5      FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:545:18)
#6      _asyncThenWrapperHelper.<anonymous closure> (dart:async/runtime/libasync_patch.dart:77:64)
#7      _rootRunUnary (dart:async/zone.dart:1132:38)
#8      _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#9      _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
#10     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
#11     Future._propagateToListeners (dart:async/future_impl.dart:668:32)
#12     Future._complete (dart:async/future_impl.dart:473:7)
#13     _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
#14     _AsyncAwaitCompleter.complete.<anonymous closure> (dart:async/runtime/libasync_patch.dart:33:20)
#15     _rootRun (dart:async/zone.dart:1124:13)
#16     _CustomZone.run (dart:async/zone.dart:1021:19)
#17     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:947:23)
#18     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#19     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#20     _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:115:13)
#21     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:172:5)

我在Flutter稳定频道v1.2.1上。

我可以毫无问题地构建apk。我还可以从另一个Flutter项目构建一个appbundle。

根据以上错误消息，您将如何开始查找问题？这可能是什么问题？

Answer 1

我有相同的错误消息类似的问题。（成功创建APK版本，但无法构建应用捆绑包）对我有效的解决方案是升级Android Gradle版本。以下是适用于我的配置（您也可以升级到最新版本）：

1. /android/gradle/wrapper/gradle-wrapper.properties：

distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip

2. /android/build.gradle：

   buildscript {
       repositories {
          google()
          jcenter()
         }
   
       dependencies {
          classpath 'com.android.tools.build:gradle:3.2.1'
       }
   }