Develop Reference

Android Studio takes too long to build the project and error occurred

I just opened a project and it pops out the stacktrace. After that I was waiting for build to finish but it took to long (more than 4 hours). I had opened the same project 1 month ago with no problemes and I'm not sure where the problem came from.
Stacktrace:
java.lang.IllegalStateException: #NotNull method com/android/tools/idea/gradle/project/model/AndroidModuleModel.getRootDir must not return null
at com.android.tools.idea.gradle.project.model.AndroidModuleModel.$$$reportNull$$$0(AndroidModuleModel.java)
at com.android.tools.idea.gradle.project.model.AndroidModuleModel.getRootDir(AndroidModuleModel.java:571)
at com.android.tools.idea.gradle.project.sync.setup.module.android.ContentRootsModuleSetupStep.findContentEntries(ContentRootsModuleSetupStep.java:71)
at com.android.tools.idea.gradle.project.sync.setup.module.android.ContentRootsModuleSetupStep.doSetUpModule(ContentRootsModuleSetupStep.java:58)
at com.android.tools.idea.gradle.project.sync.setup.module.android.ContentRootsModuleSetupStep.doSetUpModule(ContentRootsModuleSetupStep.java:41)
at com.android.tools.idea.gradle.project.sync.setup.module.ModuleSetupStep.setUpModule(ModuleSetupStep.java:35)
at com.android.tools.idea.gradle.project.sync.setup.module.common.BaseSetup.setUpModule(BaseSetup.java:41)
at com.android.tools.idea.gradle.project.sync.ng.ModuleSetup.setupModuleModels(ModuleSetup.java:141)
at com.android.tools.idea.gradle.project.sync.ng.CachedProjectModelsSetup.setUpModules(CachedProjectModelsSetup.java:116)
at com.android.tools.idea.gradle.project.sync.ng.ProjectSetup$ProjectSetupImpl.setUpProject(ProjectSetup.java:82)
at com.android.tools.idea.gradle.project.sync.ng.SyncResultHandler.onSyncSkipped(SyncResultHandler.java:164)
at com.android.tools.idea.gradle.project.sync.ng.NewGradleSync.trySyncWithCachedGradleModels(NewGradleSync.java:219)
at com.android.tools.idea.gradle.project.sync.ng.NewGradleSync.sync(NewGradleSync.java:165)
at com.android.tools.idea.gradle.project.sync.ng.NewGradleSync.access$000(NewGradleSync.java:59)
at com.android.tools.idea.gradle.project.sync.ng.NewGradleSync$2.run(NewGradleSync.java:151)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:736)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:580)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:525)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:85)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:144)
at com.intellij.openapi.progress.impl.CoreProgressManager$4.run(CoreProgressManager.java:395)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:314)
at java.util.concurrent.Executors$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)

Try File-> Invalidate Caches/Restart, it works for me.

Gradle Sync Failure after updating to version '4.10.1'/'4.10.2'

Gradle sync is failing after I updated its version in Android Studio. On checking the IDE logs I can see the following entry
2019-02-08 14:58:26,724 [ thread 66] WARN - nal.AbstractExternalSystemTask - org/jetbrains/kotlin/kapt/idea/KaptGradleModelorg/jetbrains/kotlin/kapt/idea/KaptGradleModel
com.intellij.openapi.externalSystem.model.ExternalSystemException: org/jetbrains/kotlin/kapt/idea/KaptGradleModelorg/jetbrains/kotlin/kapt/idea/KaptGradleModel
at org.jetbrains.plugins.gradle.service.execution.GradleExecutionHelper.execute(GradleExecutionHelper.java:217)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:141)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:76)
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:58)
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:100)
at com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:163)
at com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:149)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.execute(ExternalSystemUtil.java:573)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$5.run(ExternalSystemUtil.java:678)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:736)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:580)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:525)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:85)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:144)
at com.intellij.openapi.progress.impl.CoreProgressManager$4.run(CoreProgressManager.java:395)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:314)
at java.util.concurrent.Executors$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)
java.lang.NoClassDefFoundError: org/jetbrains/kotlin/kapt/idea/KaptGradleModel
at com.android.tools.idea.gradle.project.sync.idea.AndroidGradleProjectResolver.populateKaptKotlinGeneratedSourceDir(AndroidGradleProjectResolver.java:327)
at com.android.tools.idea.gradle.project.sync.idea.AndroidGradleProjectResolver.populateModuleContentRoots(AndroidGradleProjectResolver.java:218)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.populateModuleContentRoots(AbstractProjectResolverExtension.java:95)
at org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension.populateModuleContentRoots(AbstractProjectResolverExtension.java:95)
at org.jetbrains.plugins.gradle.service.project.TracedProjectResolverExtension.populateModuleContentRoots(TracedProjectResolverExtension.java:62)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.doResolveProjectInfo(GradleProjectResolver.java:383)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.access$100(GradleProjectResolver.java:76)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver$ProjectConnectionDataNodeFunction.fun(GradleProjectResolver.java:879)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver$ProjectConnectionDataNodeFunction.fun(GradleProjectResolver.java:863)
at org.jetbrains.plugins.gradle.service.execution.GradleExecutionHelper.execute(GradleExecutionHelper.java:209)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:141)
at org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:76)
at com.intellij.openapi.externalSystem.service.remote.RemoteExternalSystemProjectResolverImpl.lambda$resolveProjectInfo$0(RemoteExternalSystemProjectResolverImpl.java:37)
at com.intellij.openapi.externalSystem.service.remote.AbstractRemoteExternalSystemService.execute(AbstractRemoteExternalSystemService.java:58)
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:100)
at com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:163)
at com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:149)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.execute(ExternalSystemUtil.java:573)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$5.run(ExternalSystemUtil.java:678)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:736)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:580)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:525)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:85)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:144)
at com.intellij.openapi.progress.impl.CoreProgressManager$4.run(CoreProgressManager.java:395)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:314)
at java.util.concurrent.Executors$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)
While looking at the relevant entity name
org/jetbrains/kotlin/kapt/idea/KaptGradleModelorg/jetbrains/kotlin/kapt/idea/KaptGradleModel
There seems to have possibly been some sort of an error while copy-pasting. To the best of my understanding this isn't something I've done.
The project in question doesn't use Kotlin at all and has no plugins or dependencies for it either. It does seem that the project was configured for Kotlin at some point in the past and subsequently altered to remove the configuration.
Edit: Originally suspecting that the issue was with Gradle version 4.10.1 that Android Studio Prompted the update to, I tried to manually update to version 4.10.2 which also didn't solve the problem.
Update: Reverting the project to version 4.6 also doesn't do anything.

Following steps helps me -
Change the gradle version to 5.2.1
Upgrading the Kotlin plugin and restart Android Studio.

I found that the kotlin plugin was not checked under Settings / Plugins / Installed. Checking it and restarting the IDE solved the problem, without having to change Gradle version.

Gradle project sync failed without Messages, worked on command-line

In Android Studio, the sync failed:
Gradle project sync failed. Basic functionality (e.g. editing, debugging) will not work properly.
The command-line gradle installDebug worked. There were no messages in the "Messages" view. In the idea.log, the following NullPointerException appeared:
2018-02-04 14:53:15,233 [ thread 15] WARN - ea.IdeaSyncPopulateProjectTask - Sync failed: null
java.lang.RuntimeException: java.lang.NullPointerException
at com.intellij.openapi.application.impl.LaterInvocator.invokeAndWait(LaterInvocator.java:188)
at com.intellij.openapi.application.impl.ApplicationImpl.invokeAndWait(ApplicationImpl.java:680)
at com.intellij.openapi.application.impl.ApplicationImpl.invokeAndWait(ApplicationImpl.java:685)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.executeOnEdt(ExternalSystemApiUtil.java:469)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.executeProjectChangeAction(ExternalSystemApiUtil.java:458)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManager.dispose(ProjectDataManager.java:401)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManager.importData(ProjectDataManager.java:156)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManager.importData(ProjectDataManager.java:198)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManager.importData(ProjectDataManager.java:204)
at com.android.tools.idea.gradle.project.sync.idea.IdeaSyncPopulateProjectTask.doSelectiveImport(IdeaSyncPopulateProjectTask.java:206)
at com.android.tools.idea.gradle.project.sync.idea.IdeaSyncPopulateProjectTask.populate(IdeaSyncPopulateProjectTask.java:156)
at com.android.tools.idea.gradle.project.sync.idea.IdeaSyncPopulateProjectTask.access$000(IdeaSyncPopulateProjectTask.java:51)
at com.android.tools.idea.gradle.project.sync.idea.IdeaSyncPopulateProjectTask$1.run(IdeaSyncPopulateProjectTask.java:144)
at com.intellij.openapi.progress.impl.CoreProgressManager$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)
Caused by: java.lang.NullPointerException
at com.intellij.openapi.extensions.Extensions.disposeArea(Extensions.java:168)
at com.intellij.openapi.module.impl.ModuleImpl.dispose(ModuleImpl.java:153)
at com.intellij.openapi.util.Disposer$1.execute(Disposer.java:48)
at com.intellij.openapi.util.Disposer$1.execute(Disposer.java:44)
at com.intellij.openapi.util.objectTree.ObjectTree.executeActionWithRecursiveGuard(ObjectTree.java:151)
at com.intellij.openapi.util.objectTree.ObjectTree.executeUnregistered(ObjectTree.java:163)
at com.intellij.openapi.util.objectTree.ObjectTree.executeAll(ObjectTree.java:132)
at com.intellij.openapi.util.Disposer.dispose(Disposer.java:123)
at com.intellij.openapi.util.Disposer.dispose(Disposer.java:119)
at com.intellij.openapi.module.impl.ModuleManagerImpl$ModuleModelImpl.dispose(ModuleManagerImpl.java:836)
at com.intellij.openapi.externalSystem.service.project.AbstractIdeModifiableModelsProvider.dispose(AbstractIdeModifiableModelsProvider.java:421)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManager$3.execute(ProjectDataManager.java:404)
at com.intellij.openapi.externalSystem.util.DisposeAwareProjectChange.run(DisposeAwareProjectChange.java:36)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.lambda$null$6(ExternalSystemApiUtil.java:458)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1023)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.lambda$executeProjectChangeAction$7(ExternalSystemApiUtil.java:458)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:303)
at com.intellij.openapi.application.impl.LaterInvocator$1.run(LaterInvocator.java:165)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:410)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:399)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:762)
at java.awt.EventQueue.access$500(EventQueue.java:98)
at java.awt.EventQueue$3.run(EventQueue.java:715)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:732)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:827)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:655)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:365)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
2018-02-04 14:53:15,234 [ thread 15] INFO - e.project.sync.GradleSyncState - Gradle sync failed (4s 121ms)
Using Invalidate Caches/Restart and removing the .gradle folder did not help. Why is this? How is it fixed?

After unsetting a local gradle distribution in Settings > Build, Execution, Deployment > Gradle (which was set for debugging this problem), Android Studio offered to update to gradle:3.0.1 from gradle:3.0.0. This fixed it.
Previous steps taken:
add the google() repository to buildscript and allprojects
upgrade the compileSdkVersion, and targetSdkVersion to 27
upgrade all com.android.support libraries to 26.1.0

I was getting similar errors after I upgraded my Android Studio to 3.1.3. I don't remember the exact version I was on before that -- version 2 series.
The reason I was getting these errors was because the Gradle plugin version I was using was too low.
buildscript {
dependencies {
classpath 'com.android.tools.build:gradle:2.2.3'
...
}
Once I updated the version from 2.2.3 to 2.3.3, then Android Studio was able to move on and give me more meaningful error messages such as
Gradle sync failed: Minimum supported Gradle version is 3.3. Current version is 2.14.1. If using the gradle wrapper, try editing the distributionUrl in gradle/wrapper/gradle-wrapper.properties to gradle-3.3-all.zip
From there, it's just a matter of resolving version compatibility issues.

For me, it was a simple solution: I had deleted a module from my project and forgot to delete it from settings.gradle
Maybe this can help somebody

Gradle project sync failed on newly created Android project

I created an Android project in Intellij Idea (which I'm using instead of Android Studio because I also need to manage some React code in the project as well). I created a basic Activity which was the default for building the project:
package com.example.mypackage.reacttoastex;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
However, I am getting this error message in Intellij:
Gradle project sync failed. Basic functionality (e.g. editing, debugging) will not work properly
If I run Build Project, I am getting this:
Error:A problem occurred configuring project ':app'.
> Could not resolve all dependencies for configuration ':app:_debugApkCopy'.
> Could not find any version that matches com.android.support:appcompat-v7:27.+.
Versions that do not match:
26.0.0-alpha1
25.3.1
25.3.0
25.2.0
25.1.1
+ 31 more
Required by:
project :app
In the logs, I am getting this:
2017-11-14 14:31:38,156 [4841535] ERROR - .intellij.util.io.HttpRequests - IntelliJ IDEA 2017.2.5 Build #IU-172.4343.14
2017-11-14 14:31:38,156 [4841535] ERROR - .intellij.util.io.HttpRequests - JDK: 1.8.0_152-release
2017-11-14 14:31:38,156 [4841535] ERROR - .intellij.util.io.HttpRequests - VM: OpenJDK 64-Bit Server VM
2017-11-14 14:31:38,156 [4841535] ERROR - .intellij.util.io.HttpRequests - Vendor: JetBrains s.r.o
2017-11-14 14:31:38,156 [4841535] ERROR - .intellij.util.io.HttpRequests - OS: Mac OS X
2017-11-14 14:31:38,156 [4841535] ERROR - .intellij.util.io.HttpRequests - Last Action: GotoAction
2017-11-14 14:31:38,434 [4841813] INFO - ea.sdk.wizard.SdkQuickfixUtils - Downloading https://dl.google.com/android/repository/repository2-1.xml
2017-11-14 14:31:38,434 [4841813] ERROR - .intellij.util.io.HttpRequests - Assertion failed: Network shouldn't be accessed in EDT or inside read action
java.lang.Throwable
at com.intellij.openapi.diagnostic.Logger.assertTrue(Logger.java:168)
at com.intellij.util.io.HttpRequests.process(HttpRequests.java:384)
at com.intellij.util.io.HttpRequests.access$100(HttpRequests.java:60)
at com.intellij.util.io.HttpRequests$RequestBuilderImpl.connect(HttpRequests.java:262)
at com.intellij.util.io.RequestBuilder.saveToFile(RequestBuilder.java:67)
at com.android.tools.idea.sdk.StudioDownloader.downloadFully(StudioDownloader.java:86)
at com.android.tools.idea.sdk.StudioDownloader.downloadFully(StudioDownloader.java:98)
at com.android.tools.idea.sdk.StudioDownloader.downloadAndStream(StudioDownloader.java:54)
at com.android.repository.impl.manager.RemoteRepoLoaderImpl.fetchPackages(RemoteRepoLoaderImpl.java:100)
at com.android.repository.impl.manager.RepoManagerImpl$LoadTask.run(RepoManagerImpl.java:550)
at com.android.repository.api.RepoManager$DummyProgressRunner.runSyncWithProgress(RepoManager.java:397)
at com.android.repository.impl.manager.RepoManagerImpl.load(RepoManagerImpl.java:364)
at com.android.repository.api.RepoManager.loadSynchronously(RepoManager.java:290)
at com.android.tools.idea.sdk.wizard.SdkQuickfixUtils.createDialog(SdkQuickfixUtils.java:129)
at com.android.tools.idea.sdk.wizard.SdkQuickfixUtils.createDialogForPaths(SdkQuickfixUtils.java:85)
at com.android.tools.idea.gradle.project.sync.hyperlink.InstallRepositoryHyperlink.execute(InstallRepositoryHyperlink.java:41)
at com.android.tools.idea.gradle.project.sync.hyperlink.NotificationHyperlink.executeIfClicked(NotificationHyperlink.java:38)
at com.android.tools.idea.gradle.notification.QuickFixNotificationListener.hyperlinkActivated(QuickFixNotificationListener.java:37)
at com.intellij.notification.NotificationListener$Adapter.hyperlinkUpdate(NotificationListener.java:31)
at com.intellij.openapi.externalSystem.service.notification.NotificationData$1.hyperlinkActivated(NotificationData.java:77)
at com.intellij.notification.NotificationListener$Adapter.hyperlinkUpdate(NotificationListener.java:31)
at com.intellij.openapi.externalSystem.service.notification.EditableNotificationMessageElement$MyCellEditor$ActivatedHyperlinkListener.hyperlinkUpdate(EditableNotificationMessageElement.java:186)
at javax.swing.JEditorPane.fireHyperlinkUpdate(JEditorPane.java:342)
at javax.swing.text.html.HTMLEditorKit$LinkController.activateLink(HTMLEditorKit.java:875)
at javax.swing.text.html.HTMLEditorKit$LinkController.mouseClicked(HTMLEditorKit.java:674)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:269)
at java.awt.Component.processMouseEvent(Component.java:6544)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6306)
at java.awt.Container.processEvent(Container.java:2237)
at java.awt.Component.dispatchEventImpl(Component.java:4897)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Component.dispatchEvent(Component.java:4719)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4889)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4467)
at java.awt.Container.dispatchEventImpl(Container.java:2281)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4719)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
at java.awt.EventQueue.access$500(EventQueue.java:98)
at java.awt.EventQueue$3.run(EventQueue.java:715)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:737)
at java.awt.EventQueue$4.run(EventQueue.java:735)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
at com.intellij.ide.IdeEventQueue.d(IdeEventQueue.java:821)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:645)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:365)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
What could be the cause of this?
Maybe the Android SDK is not seen?

Had this a similar issue today
Resolved it by adding the google maven repo:
repositories {
mavenLocal()
mavenCentral()
maven {
url 'https://maven.google.com/'
name 'Google'
}
}
Not my idea though (I'm brand new to Android development and only a bit familiar with Java), I found the answer here:
https://stackoverflow.com/a/47165271/8036618
Not sure what the cause is, but I'm behind a proxy, so maybe IDEA can't download from its default repo but it can download from the google maven repo?

Unsupported method: AndroidProject.getPluginGeneration()

i try to use 1.0.2 ide,because i took over the old program of the app ,and i update to 2.3.3,cause the error ,i dont want to use 1.0.2 IDE.
android {
compileSdkVersion 20
buildToolsVersion '20.0.0'
defaultConfig {
applicationId 'xxxxx'
minSdkVersion 10
targetSdkVersion 20
versionCode 8
versionName '1.7'
}
I try to change buildToolsVersion to 21.0.0 , the problem solved!
finally ,you should check you buildtool version downdoad to 21.0.0 ,and you must to check gradle app buildtoolsversion !
i delay the problem cause i used to use eclispe and the jars are different, so perhaps double check your complesdkversion and build toolversion, you have to check and carefully .
Unsupported method: AndroidProject.getPluginGeneration(). The version
of Gradle you connect to does not support that method. To resolve the
problem you can change/upgrade the target version of Gradle you
connect to. Alternatively, you can ignore this exception and read
other information from the model.
org.gradle.tooling.model.UnsupportedMethodException: Unsupported
method: AndroidProject.getPluginGeneration(). The version of Gradle
you connect to does not support that method. To resolve the problem
you can change/upgrade the target version of Gradle you connect to.
Alternatively, you can ignore this exception and read other
information from the model. at
org.gradle.tooling.model.internal.Exceptions.unsupportedMethod(Exceptions.java:34)
at
org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$InvocationHandlerImpl.invoke(ProtocolToModelAdapter.java:342)
at com.sun.proxy.$Proxy145.getPluginGeneration(Unknown Source) at
com.android.tools.idea.fd.gradle.InstantRunGradleUtils.getIrSupportStatus(InstantRunGradleUtils.java:49)
at
com.android.tools.idea.run.AndroidRunConfigurationBase.canInstantRun(AndroidRunConfigurationBase.java:686)
at
com.android.tools.idea.run.AndroidRunConfigurationBase.getState(AndroidRunConfigurationBase.java:420)
at
com.intellij.execution.runners.ExecutionEnvironment.getState(ExecutionEnvironment.java:158)
at
com.intellij.execution.runners.BaseProgramRunner.execute(BaseProgramRunner.java:55)
at
com.intellij.execution.runners.GenericProgramRunner.execute(GenericProgramRunner.java:31)
at
com.intellij.execution.runners.BaseProgramRunner.execute(BaseProgramRunner.java:50)
at
com.intellij.execution.runners.GenericProgramRunner.execute(GenericProgramRunner.java:31)
at
com.intellij.execution.ProgramRunnerUtil.executeConfiguration(ProgramRunnerUtil.java:121)
at
com.intellij.execution.impl.ExecutionManagerImpl.start(ExecutionManagerImpl.java:116)
at
com.intellij.execution.impl.ExecutionManagerImpl.access$400(ExecutionManagerImpl.java:67)
at
com.intellij.execution.impl.ExecutionManagerImpl$7.run(ExecutionManagerImpl.java:516)
at
com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:378) at
com.intellij.util.Alarm$Request.run(Alarm.java:398) at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266) at
com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:227)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756) at
java.awt.EventQueue.access$500(EventQueue.java:97) at
java.awt.EventQueue$3.run(EventQueue.java:709) at
java.awt.EventQueue$3.run(EventQueue.java:703) at
java.security.AccessController.doPrivileged(Native Method) at
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726) at
com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:857)
at
com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:658)
at
com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:386)
at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

It can occur because AS was checking availability of the Instant Run feature. The fixed is to disable Instant Run:
Windows & Linux:
File -> Settings -> Build, Execution, Deployment -> Instant Run.
Mac:
Android Studio -> Preferences -> Build, Execution, Deployment -> Instant Run.