在Android Studio 3.0 Canary上进行项目同步和构建正常9.在升级到Android Studio 3.0 Beta 1后，刚刚开始失败Gradle同步！
在Debian GNU / Linux 9（Stretch，稳定，最新）上使用Android Studio捆绑的Java 8，无需攻击。
https://androidstudio.googleblog.com/2017/08/android-studio-30-beta-2.html
注意：重写代码需要额外的工作，以避免Android的有问题的 Java库。
https://androidstudio.googleblog.com/2017/08/android-studio-30-beta-1.html
出现了几个问题（例如，没有--min-sdk-version＆gt; = 26的签名多态方法错误）
Canary 9上没有这些问题！
Error:Execution failed for task ':app:transformClassesWithDexBuilderForDebug'.
> com.android.build.api.transform.TransformException: org.gradle.tooling.BuildException: com.android.dx.cf.code.SimException: signature-polymorphic method called without --min-sdk-version >= 26
Windows上的相同问题
Gradle error upgrading to Android Studio 3.0 Beta 1
来自Studio
Build: 3.0 Beta 1, AI-171.4243858, 201708032321,
AI-171.4243858, JRE 1.8.0_152-release-915-b01x64 JetBrains s.r.o, OS Linux(amd64) v4.9.0-3-amd64 unknown, screens 1920x1080, 1920x1080
Gradle'...'项目刷新失败
Cause: java.lang.NullPointerException
at sun.nio.fs.UnixPath.normalizeAndCheck(UnixPath.java:77)
at sun.nio.fs.UnixPath.<init>(UnixPath.java:71)
at sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:281)
at java.nio.file.Paths.get(Paths.java:84)
at com.android.build.gradle.internal.scope.BuildOutput.getOutputPath(BuildOutput.java:222)
at com.android.build.gradle.internal.scope.BuildOutputs.lambda$load$2(BuildOutputs.java:243)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1376)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at com.android.build.gradle.internal.scope.BuildOutputs.load(BuildOutputs.java:245)
at com.android.build.gradle.internal.scope.BuildOutputs.load(BuildOutputs.java:184)
at com.android.build.gradle.internal.scope.BuildOutputs.load(BuildOutputs.java:140)
at com.android.build.gradle.internal.ide.BuildOutputsSupplier.lambda$get$1(BuildOutputsSupplier.java:55)
at com.google.common.collect.ImmutableList.forEach(ImmutableList.java:397)
at com.android.build.gradle.internal.ide.BuildOutputsSupplier.get(BuildOutputsSupplier.java:50)
at com.android.build.gradle.internal.ide.BuildOutputsSupplier.get(BuildOutputsSupplier.java:35)
at com.android.build.gradle.internal.ide.AndroidArtifactImpl.getOutputs(AndroidArtifactImpl.java:134)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$ReflectionMethodInvoker.invoke(ProtocolToModelAdapter.java:592)
at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$AdaptingMethodInvoker.invoke(ProtocolToModelAdapter.java:397)
at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$PropertyCachingMethodInvoker.invoke(ProtocolToModelAdapter.java:625)
at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$SafeMethodInvoker.invoke(ProtocolToModelAdapter.java:647)
at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$SupportedPropertyInvoker.invoke(ProtocolToModelAdapter.java:670)
at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$InvocationHandlerImpl.invoke(ProtocolToModelAdapter.java:356)
at com.sun.proxy.$Proxy220.getOutputs(Unknown Source)
at com.android.tools.idea.gradle.project.model.ide.android.IdeAndroidArtifactImpl.<init>(IdeAndroidArtifactImpl.java:57)
at com.android.tools.idea.gradle.project.model.ide.android.IdeVariantImpl.lambda$new$0(IdeVariantImpl.java:60)
at com.android.tools.idea.gradle.project.model.ide.android.ModelCache.lambda$computeIfAbsent$0(ModelCache.java:31)
at java.util.HashMap.computeIfAbsent(HashMap.java:1126)
at com.android.tools.idea.gradle.project.model.ide.android.ModelCache.computeIfAbsent(ModelCache.java:31)
at com.android.tools.idea.gradle.project.model.ide.android.IdeVariantImpl.<init>(IdeVariantImpl.java:59)
at com.android.tools.idea.gradle.project.model.ide.android.IdeAndroidProjectImpl.lambda$new$4(IdeAndroidProjectImpl.java:88)
at com.android.tools.idea.gradle.project.model.ide.android.ModelCache.lambda$computeIfAbsent$0(ModelCache.java:31)
at java.util.HashMap.computeIfAbsent(HashMap.java:1126)
at com.android.tools.idea.gradle.project.model.ide.android.ModelCache.computeIfAbsent(ModelCache.java:31)
at com.android.tools.idea.gradle.project.model.ide.android.IdeModel.copy(IdeModel.java:74)
at com.android.tools.idea.gradle.project.model.ide.android.IdeAndroidProjectImpl.<init>(IdeAndroidProjectImpl.java:87)
at com.android.tools.idea.gradle.project.model.ide.android.IdeAndroidProjectImpl.<init>(IdeAndroidProjectImpl.java:68)
at com.android.tools.idea.gradle.project.model.AndroidModuleModel.<init>(AndroidModuleModel.java:131)
at com.android.tools.idea.gradle.project.sync.idea.AndroidGradleProjectResolver.populateModuleContentRoots(AndroidGradleProjectResolver.java:214)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.populateModuleContentRoots(AbstractProjectResolverExtension.java:103)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.doResolveProjectInfo(GradleProjectResolver.java:366)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.access$200(GradleProjectResolver.java:79)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver$ProjectConnectionDataNodeFunction.fun(GradleProjectResolver.java:902)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver$ProjectConnectionDataNodeFunction.fun(GradleProjectResolver.java:886)
at org.jetbrains.plugins.gradle.service.execution.GradleExecutionHelper.execute(GradleExecutionHelper.java:218)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:139)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:79)
at com.intellij.openapi.externalSystem.service.remote.RemoteExternalSystemProjectResolverImpl.lambda$resolveProjectInfo$0(RemoteExternalSystemProjectResolverImpl.java:37)
at com.intellij.openapi.externalSystem.service.remote.AbstractRemoteExternalSystemService.execute(AbstractRemoteExternalSystemService.java:59)
at com.intellij.openapi.externalSystem.service.remote.RemoteExternalSystemProjectResolverImpl.resolveProjectInfo(RemoteExternalSystemProjectResolverImpl.java:37)
at com.intellij.openapi.externalSystem.service.remote.wrapper.ExternalSystemProjectResolverWrapper.resolveProjectInfo(ExternalSystemProjectResolverWrapper.java:45)
at com.intellij.openapi.externalSystem.service.internal.ExternalSystemResolveProjectTask.doExecute(ExternalSystemResolveProjectTask.java:66)
at com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:139)
at com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:125)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.execute(ExternalSystemUtil.java:388)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$5.run(ExternalSystemUtil.java:445)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:726)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:176)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:556)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:501)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:66)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:163)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$1.run(ProgressManagerImpl.java:137)
at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:334)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
答案 0 :(得分：14)
您可以通过执行以下操作来解决此问题：
Build > Clean Project
参考：https://androidstudio.googleblog.com/2017/08/android-studio-30-beta-1.html
答案 1 :(得分：8)
在这里阅读： https://androidstudio.googleblog.com/2017/08/android-studio-30-beta-1.html
或者像我一样，打开标签＆＃34; Gradle＆＃34;并且运行＆＃34;清洁＆＃34;然后＆＃34;组装＆＃34; 像这样：
在Android Studio右侧，打开标签＆＃34; gradle＆＃34;，然后在＆＃34;：app＆＃34; /＆＃34; Tasks＆＃34; /＆＃34; build＆＃ 34;你会看到＆＃34;清洁＆＃34;，＆＃34;汇编＆＃34;和其他任务。
首先运行清理然后组装，您可能会收到错误但它仍然有效并最终重建您的项目。
答案 2 :(得分：2)
有一个solution offered by Google：
选择 Build ＆gt;解决此问题从菜单栏中清理项目。您只需为每个项目执行一次此操作。然后，您可以通过单击工具栏中的同步项目将项目文件与Gradle同步。
答案 3 :(得分：2)
以下解决方案对我不起作用：
解决方案：
在我刚刚访问〜/ .gradle文件夹之后，它包含一个名为wrapper的文件夹，只需将其重命名为其他任何东西，即wrapper123。这就解决了问题!!!!按构建，它将开始同步和构建项目
答案 4 :(得分：0)
我在Android Studio 3.0 Beta 2上，我发现在此处提出的clean和sync之上，对于我的Java-Kotlin混合代码库项目，我有将我的Kotlin版本删除到1.1.3-2，这是IDE捆绑版本，clean＆amp; sync然后工作，然后我可以将Kotlin版本带回1.1.4，这是撰写本文时的最新版本。
答案 5 :(得分：0)
需要在线获取，直到修复错误为止（修复gradle错误。成功修复错误后，您可以脱机工作。）
1。从-> https://gradle.org/releases
下载最新的gradle。
2. 下载zip文件后，将所有文件解压缩到一个文件夹中（为好工作：-将文件夹命名为“ gradle4”，将安装了android studio的本地光盘放在同一位置，例如，您安装了android工作室在本地光盘中：c（如果将“ gradle4”放在本地光盘中c）
3. android studio->文件菜单->设置->构建，执行，部署-> Gradle
4. 检查使用本地Gradle分发
5. 将gradle文件夹路径放入gradle主页选项 Screen shot of gradle setting step 5
6. 启用嵌入式Maven存储库 Screen shot of Enable Maven Repository
点击->应用
构建菜单->清理项目
-问题已解决-
