title: Gradle 0.9.+/0.9.2 error: Unable to load class 'com.android.builder.testing.api.DeviceProvider'
body: <p>This morning, all <strong>Android Studio</strong> projects started failing Gradle sync/build/clean with:</p>
  
  <blockquote>
  <pre><code>&gt; Could not create plugin of type 'AppPlugin'.
  </code></pre>
  </blockquote>
  
  <p>The stacktrace looks like:</p>
  
  <pre><code>* 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.&lt;init&gt;(BasePlugin.groovy:1908)
      at com.android.build.gradle.AppPlugin.&lt;init&gt;(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
  </code></pre>
  
  <p>There's a <a href="https://code.google.com/p/android/issues/detail?id=67693" rel="nofollow">bug report</a> with a fair bit of activity, but no resolution yet.</p>
  
  <p>This is <strong>Android Studio 0.5.2</strong>, gradle version <strong>1.11/0.9.2</strong>.</p>
  
  <p>Ideas?</p>