Develop Reference

Error during building apk java.lang.AssertionError

At firt time in my life I try to create apk file, and I get this error:
java.lang.AssertionError
at org.jetbrains.android.exportSignedPackage.ExportSignedPackageWizard.doOKAction(ExportSignedPackageWizard.java:154)
at com.intellij.ide.wizard.AbstractWizard.proceedToNextStep(AbstractWizard.java:237)
at com.intellij.ide.wizard.AbstractWizard$5.actionPerformed(AbstractWizard.java:199)
at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:270)
at java.desktop/java.awt.Component.processMouseEvent(Component.java:6654)
at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3345)
at java.desktop/java.awt.Component.processEvent(Component.java:6419)
at java.desktop/java.awt.Container.processEvent(Container.java:2263)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5029)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4861)
at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2793)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4861)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:778)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:751)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:749)
at java.base/java.security.AccessController.doPrivileged(Native Method)
...
I have the latest android studio (Android Studio Electric Eel | 2022.1.1) and all sdk tools are updated.

It was stupid mistake. I didn't open folder android.
I open my root folder, something like my-app.
But in any capacitor projects need to open my-app/android in android studio.

Android studio always give me 'Error creating AVD'

I'm on Mac, and i just downloaded Android Studio. Whenever i create an emulator, it gives me this error:
java.lang.NullPointerException
at com.android.tools.idea.devicemanager.virtualtab.BuildVirtualDeviceConfigurationWizardActionListener.actionPerformed(BuildVirtualDeviceConfigurationWizardActionListener.java:45)
at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:270)
at java.desktop/java.awt.Component.processMouseEvent(Component.java:6654)
at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3345)
at java.desktop/java.awt.Component.processEvent(Component.java:6419)
at java.desktop/java.awt.Container.processEvent(Container.java:2263)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5029)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4861)
at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2793)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4861)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:778)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:751)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:749)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:748)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:898)
at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:820)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:743)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:439)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:803)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:438)
at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:119)
at com.intellij.ide.IdeEventQueue.performActivity(IdeEventQueue.java:604)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:436)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:873)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:484)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)
I can't think about any solution. Any help? If you need additional infos on what i did (even if i did absolutely nothing, i literally just downloaded the program and that's it), i'll provide them.

Android Studio fails to create new project

I'm getting started using Android Studio, and even after reinstalling the entire IDE a couple of times it's still not working right. When I create a new project, it loads with an error saying that the gradle wrapper properties could not load.
Could not load wrapper properties from '...MyApplication2\gradle\wrapper\gradle-wrapper.properties'.
The contents of that file, on the newly created project mind you, are this:
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="AndroidLayouts">
<shared>
<config />
</shared>
</component>
<component name="AndroidLogFilters">
<
Exactly that, with the unmatched final bracket and all. And when creating a new project, the IDE throws this error message.
java.lang.RuntimeException: java.lang.NullPointerException
at com.intellij.openapi.application.TransactionGuardImpl.submitTransactionAndWait(TransactionGuardImpl.java:174)
at com.intellij.openapi.command.WriteCommandAction.execute(WriteCommandAction.java:234)
at com.intellij.openapi.command.WriteCommandAction$BuilderImpl.compute(WriteCommandAction.java:122)
at com.android.tools.idea.npw.module.ModuleModel$ModuleTemplateRenderer.render(ModuleModel.kt:125)
at com.android.tools.idea.npw.model.MultiTemplateRenderer$countDown$2.invoke(MultiTemplateRenderer.kt:139)
at com.android.tools.idea.npw.model.MultiTemplateRenderer$countDown$2.invoke(MultiTemplateRenderer.kt:42)
at com.android.tools.idea.npw.model.NewProjectModel$multiTemplateRenderer$1$$special$$inlined$run$lambda$1$1.run(NewProjectModel.kt:124)
at com.intellij.openapi.fileEditor.impl.NonProjectFileWritingAccessProvider.disableChecksDuring(NonProjectFileWritingAccessProvider.java:174)
at com.android.tools.idea.npw.model.NewProjectModel$multiTemplateRenderer$1$$special$$inlined$run$lambda$1.invoke(NewProjectModel.kt:123)
at com.android.tools.idea.npw.model.NewProjectModel$multiTemplateRenderer$1$$special$$inlined$run$lambda$1.invoke(NewProjectModel.kt:103)
at com.android.tools.idea.gradle.project.AndroidNewProjectInitializationStartupActivity.runActivity(AndroidNewProjectInitializationStartupActivity.kt:41)
at com.intellij.ide.startup.impl.StartupManagerImpl.runActivity(StartupManagerImpl.java:216)
at com.intellij.ide.startup.impl.StartupManagerImpl.lambda$runPostStartupActivitiesFromExtensions$2(StartupManagerImpl.java:168)
at com.intellij.openapi.extensions.impl.ExtensionPointImpl.processWithPluginDescriptor(ExtensionPointImpl.java:292)
at com.intellij.openapi.extensions.ExtensionPointName.processWithPluginDescriptor(ExtensionPointName.java:157)
at com.intellij.ide.startup.impl.StartupManagerImpl.runPostStartupActivitiesFromExtensions(StartupManagerImpl.java:166)
at com.intellij.openapi.project.impl.ProjectManagerImpl.doLoadProject(ProjectManagerImpl.java:461)
at com.intellij.openapi.project.impl.ProjectManagerImpl.lambda$loadProjectUnderProgress$8(ProjectManagerImpl.java:440)
at com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:247)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:888)
at com.intellij.openapi.progress.impl.CoreProgressManager$5.run(CoreProgressManager.java:441)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:163)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:585)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:531)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:59)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:150)
at com.intellij.openapi.application.impl.ApplicationImpl.lambda$null$4(ApplicationImpl.java:441)
at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:221)
at com.intellij.util.ConcurrencyUtil.lambda$underThreadNameRunnable$3(ConcurrencyUtil.java:209)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:238)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at com.intellij.xml.arrangement.XmlArrangementVisitor.createNewEntry(XmlArrangementVisitor.java:100)
at com.intellij.xml.arrangement.XmlArrangementVisitor.visitXmlTag(XmlArrangementVisitor.java:52)
at com.intellij.psi.impl.source.xml.XmlTagImpl.accept(XmlTagImpl.java:310)
at com.intellij.xml.arrangement.XmlArrangementVisitor.visitXmlFile(XmlArrangementVisitor.java:45)
at com.intellij.psi.impl.source.xml.XmlFileImpl.accept(XmlFileImpl.java:71)
at com.intellij.xml.arrangement.XmlRearranger.parse(XmlRearranger.java:128)
at com.intellij.psi.codeStyle.arrangement.engine.ArrangementEngine$Context.from(ArrangementEngine.java:550)
at com.intellij.psi.codeStyle.arrangement.engine.ArrangementEngine.arrange(ArrangementEngine.java:119)
at com.intellij.psi.codeStyle.arrangement.engine.ArrangementEngine.arrange(ArrangementEngine.java:83)
at com.android.tools.idea.templates.TemplateUtils.reformatAndRearrange(TemplateUtils.kt:208)
at com.android.tools.idea.templates.TemplateUtils.reformatAndRearrange$default(TemplateUtils.kt:184)
at com.android.tools.idea.templates.TemplateUtils$reformatAndRearrange$1.run(TemplateUtils.kt:154)
at com.intellij.openapi.command.WriteCommandAction.lambda$runWriteCommandAction$5(WriteCommandAction.java:356)
at com.intellij.openapi.command.WriteCommandAction$BuilderImpl$1.run(WriteCommandAction.java:110)
at com.intellij.openapi.application.RunResult.run(RunResult.java:35)
at com.intellij.openapi.command.WriteCommandAction.lambda$null$1(WriteCommandAction.java:251)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:885)
at com.intellij.openapi.command.WriteCommandAction.lambda$performWriteCommandAction$2(WriteCommandAction.java:250)
at com.intellij.openapi.command.WriteCommandAction.lambda$doExecuteCommand$4(WriteCommandAction.java:308)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:212)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:188)
at com.intellij.openapi.command.WriteCommandAction.doExecuteCommand(WriteCommandAction.java:310)
at com.intellij.openapi.command.WriteCommandAction.performWriteCommandAction(WriteCommandAction.java:249)
at com.intellij.openapi.command.WriteCommandAction.execute(WriteCommandAction.java:230)
at com.intellij.openapi.command.WriteCommandAction$BuilderImpl.run(WriteCommandAction.java:112)
at com.intellij.openapi.command.WriteCommandAction.runWriteCommandAction(WriteCommandAction.java:356)
at com.intellij.openapi.command.WriteCommandAction.runWriteCommandAction(WriteCommandAction.java:348)
at com.android.tools.idea.templates.TemplateUtils.reformatAndRearrange(TemplateUtils.kt:146)
at com.android.tools.idea.npw.model.NewTemplateRendererKt$render$2.run(NewTemplateRenderer.kt:65)
at com.intellij.ide.startup.impl.StartupManagerImpl.lambda$runWhenProjectIsInitialized$6(StartupManagerImpl.java:486)
at com.intellij.ui.GuiUtils.invokeLaterIfNeeded(GuiUtils.java:324)
at com.intellij.ide.startup.impl.StartupManagerImpl.runWhenProjectIsInitialized(StartupManagerImpl.java:472)
at com.android.tools.idea.npw.model.NewTemplateRendererKt.render(NewTemplateRenderer.kt:65)
at com.android.tools.idea.npw.module.ModuleModel$ModuleTemplateRenderer.renderTemplate(ModuleModel.kt:152)
at com.android.tools.idea.npw.module.ModuleModel$ModuleTemplateRenderer$render$success$1.compute(ModuleModel.kt:126)
at com.android.tools.idea.npw.module.ModuleModel$ModuleTemplateRenderer$render$success$1.compute(ModuleModel.kt:77)
at com.intellij.openapi.command.WriteCommandAction$BuilderImpl$2.run(WriteCommandAction.java:120)
at com.intellij.openapi.application.RunResult.run(RunResult.java:35)
at com.intellij.openapi.command.WriteCommandAction.lambda$null$1(WriteCommandAction.java:251)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:885)
at com.intellij.openapi.command.WriteCommandAction.lambda$performWriteCommandAction$2(WriteCommandAction.java:250)
at com.intellij.openapi.command.WriteCommandAction.lambda$doExecuteCommand$4(WriteCommandAction.java:308)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:220)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:188)
at com.intellij.openapi.command.WriteCommandAction.doExecuteCommand(WriteCommandAction.java:310)
at com.intellij.openapi.command.WriteCommandAction.performWriteCommandAction(WriteCommandAction.java:249)
at com.intellij.openapi.command.WriteCommandAction.lambda$execute$0(WriteCommandAction.java:234)
at com.intellij.openapi.application.TransactionGuardImpl.lambda$submitTransactionAndWait$2(TransactionGuardImpl.java:162)
at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:83)
at com.intellij.openapi.application.TransactionGuardImpl.lambda$submitTransaction$1(TransactionGuardImpl.java:107)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:441)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:424)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:407)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
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:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:908)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:781)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:424)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:687)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:190)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:235)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:233)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:233)
at java.awt.Dialog.show(Dialog.java:1077)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:708)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:433)
at com.intellij.openapi.ui.DialogWrapper.doShow(DialogWrapper.java:1698)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1657)
at com.intellij.openapi.progress.util.ProgressDialog.show(ProgressDialog.java:270)
at com.intellij.openapi.progress.util.ProgressWindow.showDialog(ProgressWindow.java:211)
at com.intellij.openapi.progress.util.ProgressWindow.lambda$null$1(ProgressWindow.java:144)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:309)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:441)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:424)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:407)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
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:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:908)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:781)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:424)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:698)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
at com.intellij.ide.IdeEventQueue.pumpEventsForHierarchy(IdeEventQueue.java:965)
at com.intellij.openapi.progress.util.ProgressWindow.startBlocking(ProgressWindow.java:186)
at com.intellij.openapi.progress.util.ProgressWindow.startBlocking(ProgressWindow.java:172)
at com.intellij.openapi.application.impl.ApplicationImpl.runProcessWithProgressSynchronously(ApplicationImpl.java:455)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcessWithProgressSynchronously(CoreProgressManager.java:453)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcessWithProgressSynchronously(ProgressManagerImpl.java:82)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcessWithProgressSynchronously(CoreProgressManager.java:250)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcessWithProgressSynchronously(CoreProgressManager.java:204)
at com.intellij.openapi.project.impl.ProjectManagerImpl.loadProjectUnderProgress(ProjectManagerImpl.java:439)
at com.intellij.openapi.project.impl.ProjectManagerImpl.lambda$openProject$5(ProjectManagerImpl.java:415)
at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:83)
at com.intellij.openapi.application.TransactionGuardImpl.submitTransactionAndWait(TransactionGuardImpl.java:149)
at com.intellij.openapi.project.impl.ProjectManagerImpl.openProject(ProjectManagerImpl.java:414)
at com.android.tools.idea.npw.model.NewProjectModel$multiTemplateRenderer$1.invoke(NewProjectModel.kt:127)
at com.android.tools.idea.npw.model.NewProjectModel$multiTemplateRenderer$1.invoke(NewProjectModel.kt:103)
at com.android.tools.idea.npw.model.MultiTemplateRenderer.countDown(MultiTemplateRenderer.kt:128)
at com.android.tools.idea.npw.model.MultiTemplateRenderer.skipRender(MultiTemplateRenderer.kt:116)
at com.android.tools.idea.npw.model.RenderTemplateModel.handleSkipped(RenderTemplateModel.kt:128)
at com.android.tools.idea.wizard.model.ModelWizard.handleFinished(ModelWizard.java:408)
at com.android.tools.idea.wizard.model.ModelWizard.goForward(ModelWizard.java:330)
at com.android.tools.idea.wizard.model.ModelWizardDialog$FinishAction.doAction(ModelWizardDialog.java:313)
at com.intellij.openapi.ui.DialogWrapper$DialogWrapperAction.actionPerformed(DialogWrapper.java:1834)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6550)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3325)
at java.awt.Component.processEvent(Component.java:6315)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4899)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4721)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4721)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:766)
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:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:739)
at java.awt.EventQueue$4.run(EventQueue.java:737)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:736)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:908)
at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:846)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:778)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:424)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:687)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:190)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:235)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:233)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:233)
at java.awt.Dialog.show(Dialog.java:1077)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:708)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:433)
at com.intellij.openapi.ui.DialogWrapper.doShow(DialogWrapper.java:1698)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1657)
at com.android.tools.idea.actions.AndroidNewProjectAction.actionPerformed(AndroidNewProjectAction.kt:45)
at com.intellij.openapi.actionSystem.ex.ActionUtil$1.run(ActionUtil.java:298)
at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:315)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.lambda$actionPerformed$0(ActionMenuItem.java:293)
at com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:263)
at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.runOnOwnContext(IdeFocusManagerImpl.java:77)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:282)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem.lambda$fireActionPerformed$0(ActionMenuItem.java:110)
at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:83)
at com.intellij.openapi.application.TransactionGuardImpl.lambda$submitTransaction$1(TransactionGuardImpl.java:107)
at com.intellij.openapi.application.TransactionGuardImpl.submitTransaction(TransactionGuardImpl.java:116)
at com.intellij.openapi.application.TransactionGuard.submitTransaction(TransactionGuard.java:121)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:110)
at com.intellij.ui.plaf.beg.BegMenuItemUI.doClick(BegMenuItemUI.java:517)
at com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:36)
at com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:539)
at java.awt.Component.processMouseEvent(Component.java:6550)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3325)
at java.awt.Component.processEvent(Component.java:6315)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4899)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4721)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4721)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:766)
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:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:739)
at java.awt.EventQueue$4.run(EventQueue.java:737)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:736)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:908)
at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:846)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:778)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:424)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:698)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
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)
No activity is created in the new project, and when I go to create a new activity, it doesn't give any error message, but no new activity shows up in the IDE or in the file explorer.
I'm running the latest version of Android Studio. I tried uninstalling everything and reinstalling it. Same problem. I tried installing a different SDK version and it still did this. Any help would be appreciated. Thanks!

I met the same problem as you. I also opened the gradle-wrapper.properties and it seemed broken. So I opened another gradle-wrapper.properties created in my previous project, its content is:
#Fri Jul 31 11:47:56 CST 2020
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip
make sure the gradle version is what you need.
Upd: I found although the build process was successful after editing the file, there was no default activity in directory Java, so I tried uninstalling the whole thing and reinstalling Android Studio in another place. It worked!

Exception in plugin Android support "Icon cannot be found in"

When I try to create new virtual device I get this exception:
Icon cannot be found in '/icons/versions/null_32.png', aClass='class icons.AndroidIcons'
Icon cannot be found in '/icons/versions/null_32.png', aClass='class icons.AndroidIcons'
java.lang.Throwable
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:113)
at com.intellij.openapi.util.IconLoader.getIcon(IconLoader.java:166)
at com.android.tools.idea.avdmanager.ConfigureAvdOptionsStep$18.setValue(ConfigureAvdOptionsStep.java:769)
at com.android.tools.idea.avdmanager.ConfigureAvdOptionsStep$18.setValue(ConfigureAvdOptionsStep.java:762)
at com.android.tools.idea.wizard.ScopedDataBinder.register(ScopedDataBinder.java:424)
at com.android.tools.idea.avdmanager.ConfigureAvdOptionsStep.registerComponents(ConfigureAvdOptionsStep.java:519)
at com.android.tools.idea.avdmanager.ConfigureAvdOptionsStep.init(ConfigureAvdOptionsStep.java:248)
at com.android.tools.idea.wizard.DynamicWizardStep.onEnterStep(DynamicWizardStep.java:163)
at com.android.tools.idea.avdmanager.ConfigureAvdOptionsStep.onEnterStep(ConfigureAvdOptionsStep.java:332)
at com.android.tools.idea.wizard.DynamicWizardPath.next(DynamicWizardPath.java:293)
at com.android.tools.idea.wizard.DynamicWizardPath.onPathStarted(DynamicWizardPath.java:160)
at com.android.tools.idea.wizard.DynamicWizard.showNextStep(DynamicWizard.java:356)
at com.android.tools.idea.wizard.DynamicWizard.doNextAction(DynamicWizard.java:339)
at com.android.tools.idea.wizard.DialogWrapperHost$NextAction.doAction(DialogWrapperHost.java:301)
at com.intellij.openapi.ui.DialogWrapper$DialogWrapperAction.actionPerformed(DialogWrapper.java:1719)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6525)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6290)
at java.awt.Container.processEvent(Container.java:2234)
at java.awt.Component.dispatchEventImpl(Component.java:4881)
at java.awt.Container.dispatchEventImpl(Container.java:2292)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2278)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:751)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:702)
at java.awt.EventQueue$3.run(EventQueue.java:696)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:724)
at java.awt.EventQueue$4.run(EventQueue.java:722)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:721)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:697)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:520)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:335)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:184)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:229)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:227)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227)
at java.awt.Dialog.show(Dialog.java:1084)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:787)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:463)
at com.intellij.openapi.ui.DialogWrapper.showAndGetOk(DialogWrapper.java:1557)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1524)
at com.intellij.openapi.ui.DialogWrapper.showAndGet(DialogWrapper.java:1528)
at com.android.tools.idea.wizard.DynamicWizard.showAndGet(DynamicWizard.java:472)
at com.android.tools.idea.avdmanager.CreateAvdAction.actionPerformed(CreateAvdAction.java:43)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6525)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6290)
at java.awt.Container.processEvent(Container.java:2234)
at java.awt.Component.dispatchEventImpl(Component.java:4881)
at java.awt.Container.dispatchEventImpl(Container.java:2292)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2278)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:751)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:702)
at java.awt.EventQueue$3.run(EventQueue.java:696)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:724)
at java.awt.EventQueue$4.run(EventQueue.java:722)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:721)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:697)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:520)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:335)
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)
java.lang.Throwable
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:113)
at com.intellij.openapi.util.IconLoader.getIcon(IconLoader.java:166)
at com.android.tools.idea.avdmanager.ConfigureAvdOptionsStep$18.setValue(ConfigureAvdOptionsStep.java:769)
at com.android.tools.idea.avdmanager.ConfigureAvdOptionsStep$18.setValue(ConfigureAvdOptionsStep.java:762)
at com.android.tools.idea.wizard.ScopedDataBinder.internalUpdateKey(ScopedDataBinder.java:167)
at com.android.tools.idea.wizard.ScopedDataBinder.invokeUpdate(ScopedDataBinder.java:147)
at com.android.tools.idea.wizard.DynamicWizardStep.performUpdate(DynamicWizardStep.java:215)
at com.android.tools.idea.wizard.DynamicWizardStep.access$000(DynamicWizardStep.java:51)
at com.android.tools.idea.wizard.DynamicWizardStep$StepUpdate.run(DynamicWizardStep.java:396)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310)
at com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254)
at com.intellij.util.ui.UIUtil.invokeLaterIfNeeded(UIUtil.java:2057)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:266)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
at com.intellij.util.Alarm$Request$1$1.run(Alarm.java:321)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:749)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:702)
at java.awt.EventQueue$3.run(EventQueue.java:696)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:719)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:697)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:524)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:335)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:184)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:229)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:227)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227)
at java.awt.Dialog.show(Dialog.java:1084)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:787)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:463)
at com.intellij.openapi.ui.DialogWrapper.showAndGetOk(DialogWrapper.java:1557)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1524)
at com.intellij.openapi.ui.DialogWrapper.showAndGet(DialogWrapper.java:1528)
at com.android.tools.idea.wizard.DynamicWizard.showAndGet(DynamicWizard.java:472)
at com.android.tools.idea.avdmanager.CreateAvdAction.actionPerformed(CreateAvdAction.java:43)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6525)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6290)
at java.awt.Container.processEvent(Container.java:2234)
at java.awt.Component.dispatchEventImpl(Component.java:4881)
at java.awt.Container.dispatchEventImpl(Container.java:2292)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2278)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:751)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:702)
at java.awt.EventQueue$3.run(EventQueue.java:696)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:724)
at java.awt.EventQueue$4.run(EventQueue.java:722)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:721)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:697)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:520)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:335)
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)
I'm trying to migrate to Android Studio but I've spent 2 or 3 days to fix the strange errors and bugs and still here I am! I'm really getting upset with AS

I have encountered the same problem after I have updated buildToolsVersion to 22. I solve it by changing buildToolsVersion from "21.11.2" to "22" in build.gradle

I created a fresh project using the Navigation Drawer activity. This gave me a PlaceholderFragment as an inner class, in my main activity source. I pulled the PlaceholderFragment into its own class. This caused the error described here.
I fixed it by doing:
Build -> Rebuild Project (probably not necessary)
Tools -> Android -> Sync Project with Gradle Files
File -> Invalidate Caches / Restart...

Well, I did below to get away from this exception:
1- Unistalled current version 1.1.0
2- installed older version of Android Studio
3- Updated the IDE to latest version!

Same here...go to build.gradle, i changed the following to 22
android {
compileSdkVersion 22
buildToolsVersion "22"
defaultConfig {
applicationId "course.examples.helloandroid"
minSdkVersion 22
targetSdkVersion 22
....
}
and then sync. It worked for me.
But I'm new to this so please take second opinion.
Cheers!

preview layouts android studio error on ubuntu

when i try to rendering and preview layouts on android studio on ubuntu 14.04 i've this error:
java.lang.AssertionError
at com.android.tools.idea.rendering.multi.RenderPreview.<init>(RenderPreview.java:186)
at com.android.tools.idea.rendering.multi.RenderPreview.create(RenderPreview.java:459)
at com.android.tools.idea.rendering.multi.RenderPreviewManager.addScreenSizePreviews(RenderPreviewManager.java:1187)
at com.android.tools.idea.rendering.multi.RenderPreviewManager.recomputePreviews(RenderPreviewManager.java:781)
at com.android.tools.idea.rendering.multi.RenderPreviewManager.selectMode(RenderPreviewManager.java:822)
at com.android.tools.idea.configurations.ConfigurationMenuAction$PreviewAction.actionPerformed(ConfigurationMenuAction.java:262)
at com.intellij.ui.popup.PopupFactoryImpl$ActionPopupStep$1.run(PopupFactoryImpl.java:733)
at com.intellij.ui.popup.AbstractPopup$18.run(AbstractPopup.java:1248)
at com.intellij.openapi.wm.impl.FocusManagerImpl.flushRequest(FocusManagerImpl.java:651)
at com.intellij.openapi.wm.impl.FocusManagerImpl.flushNow(FocusManagerImpl.java:632)
at com.intellij.openapi.wm.impl.FocusManagerImpl.flushIdleRequests(FocusManagerImpl.java:602)
at com.intellij.openapi.wm.impl.FocusManagerImpl.access$200(FocusManagerImpl.java:60)
at com.intellij.openapi.wm.impl.FocusManagerImpl$IdleRunnable.runEdt(FocusManagerImpl.java:108)
at com.intellij.openapi.util.EdtRunnable$1.run(EdtRunnable.java:28)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:697)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:524)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:335)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
i've install it by ppa and i've 0.8.13 versione of android studio. how can i fix that?