This morning, all Android Studio projects started failing Gradle sync/build/clean with:
> Could not create plugin of type 'AppPlugin'.
The stacktrace looks like:
* Exception is:
org.gradle.api.GradleScriptException: A problem occurred evaluating project ':Project'.
at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:54)
at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:177)
at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:38)
at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:25)
at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:55)
at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:507)
at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:82)
at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:31)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:142)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:113)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:81)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:64)
at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:33)
at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:24)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:35)
at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:45)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:42)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:24)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.StartStopIfBuildAndStop.execute(StartStopIfBuildAndStop.java:33)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.ReturnResult.execute(ReturnResult.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:71)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:69)
at org.gradle.util.Swapper.swap(Swapper.java:38)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:69)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:60)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:45)
at org.gradle.launcher.daemon.server.DaemonStateCoordinator.runCommand(DaemonStateCoordinator.java:186)
at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy.doBuild(StartBuildOrRespondWithBusy.java:49)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.HandleStop.execute(HandleStop.java:36)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.DaemonHygieneAction.execute(DaemonHygieneAction.java:39)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.CatchAndForwardDaemonFailure.execute(CatchAndForwardDaemonFailure.java:32)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
at org.gradle.launcher.daemon.server.exec.DefaultDaemonCommandExecuter.executeCommand(DefaultDaemonCommandExecuter.java:51)
at org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler$ConnectionWorker.handleCommand(DefaultIncomingConnectionHandler.java:155)
at org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler$ConnectionWorker.receiveAndHandleCommand(DefaultIncomingConnectionHandler.java:128)
at org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler$ConnectionWorker.run(DefaultIncomingConnectionHandler.java:116)
at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:64)
Caused by: org.gradle.api.plugins.PluginInstantiationException: Could not create plugin of type 'AppPlugin'.
at org.gradle.api.internal.plugins.DefaultPluginRegistry.loadPlugin(DefaultPluginRegistry.java:69)
at org.gradle.api.internal.plugins.DefaultPluginContainer.providePlugin(DefaultPluginContainer.java:103)
at org.gradle.api.internal.plugins.DefaultPluginContainer.addPluginInternal(DefaultPluginContainer.java:68)
at org.gradle.api.internal.plugins.DefaultPluginContainer.apply(DefaultPluginContainer.java:34)
at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.applyPlugin(DefaultObjectConfigurationAction.java:101)
at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.access$200(DefaultObjectConfigurationAction.java:32)
at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction$3.run(DefaultObjectConfigurationAction.java:72)
at org.gradle.api.internal.plugins.DefaultObjectConfigurationAction.execute(DefaultObjectConfigurationAction.java:114)
at org.gradle.api.internal.project.AbstractPluginAware.apply(AbstractPluginAware.java:39)
at org.gradle.api.Project$apply.call(Unknown Source)
at org.gradle.api.internal.project.ProjectScript.apply(ProjectScript.groovy:34)
at org.gradle.api.Script$apply.callCurrent(Unknown Source)
at build_5mm5fv0emagtc49feqskf025g1.run(/projectdir/build.gradle:9)
at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:52)
... 53 more
Caused by: java.lang.NoClassDefFoundError: com/android/builder/testing/api/DeviceProvider
at com.android.build.gradle.AppPlugin.$getStaticMetaClass(AppPlugin.groovy)
at com.android.build.gradle.BasePlugin.<init>(BasePlugin.groovy:1908)
at com.android.build.gradle.AppPlugin.<init>(AppPlugin.groovy:37)
at org.gradle.api.internal.DependencyInjectingInstantiator.newInstance(DependencyInjectingInstantiator.java:62)
at org.gradle.api.internal.plugins.DefaultPluginRegistry.loadPlugin(DefaultPluginRegistry.java:67)
... 66 more
Caused by: java.lang.ClassNotFoundException: com.android.builder.testing.api.DeviceProvider
... 71 more
There's a bug report with a fair bit of activity, but no resolution yet.
This is Android Studio 0.5.2, gradle version 1.11/0.9.2.
Ideas?
Per the latest in the bug report, the issue was that version 0.9.2 was being served from Maven central even though all the necessary components weren't yet available (and gradle doesn't register that as a problem). This breaks things because pieces are missing. Version 0.9.2 is now completely available and works, but if you're seeing this bug your gradle cache is corrupted.
To fix:
gradle --refresh-dependencies
or delete
~/.gradle/caches
and then re-sync.
Prior fix, see above for update.
Based on comments in the bug report, it appears that version 0.9.2 is the source of this problem.
To fix, peg the gradle version to known-good version 0.9.1 instead of 0.9.+, 0.+, +, etc.
In your build.gradle file, change
classpath 'com.android.tools.build:gradle:0.9.+'
to
classpath 'com.android.tools.build:gradle:0.9.1'
Spiros
In order to use the latest Gradle version 0.9.+, you have to update gradlewrapper.properties file too.
Open gradlewrapper.properties file which locate under youProjectPath/gradle/wrapper/gradlewrapper.properties path:
change distributionUrl url From
distributionUrl=http\://services.gradle.org/distributions/gradle-1.10-all.zip
To
distributionUrl=http\://services.gradle.org/distributions/gradle-1.11-all.zip
After that, I changed build.gradle dependencies to
classpath 'com.android.tools.build:gradle:0.9.+'
and synced gradle files and everything when good.
Cheers
来源：https://stackoverflow.com/questions/22670395/gradle-0-9-0-9-2-error-unable-to-load-class-com-android-builder-testing-api