Develop Reference

Android Studio 3.3.1, Anko support 0.10.7: Getting grey screen with no preview

Using this configuration I can't see any preview of Anko Preview, only a grey screen. Help, I'm Blocked!!
I used so many Anko Library 0.10.* and it doesn't work, my preview is only in grey, deadlines are not far and I'm stuck with this problem for one week, help!! If anyone has a solution that will be great.
Screenshot:
My stacktrace:
java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.jetbrains.kotlin.android.dslpreview.DslPreviewClassResolver$Companion.createTypeMapper(DslPreviewClassResolver.kt:131)
at org.jetbrains.kotlin.android.dslpreview.DslPreviewClassResolver$Companion.access$createTypeMapper(DslPreviewClassResolver.kt:122)
at org.jetbrains.kotlin.android.dslpreview.DslPreviewClassResolver.resolveClassDescription(DslPreviewClassResolver.kt:116)
at org.jetbrains.kotlin.android.dslpreview.DslPreviewClassResolver.getAncestors(DslPreviewClassResolver.kt:74)
at org.jetbrains.kotlin.android.dslpreview.AnkoNlPreviewManager.resolveAvailableClasses(AnkoNlPreviewManager.kt:167)
at org.jetbrains.kotlin.android.dslpreview.AnkoNlPreviewManager.initToolWindow(AnkoNlPreviewManager.kt:156)
at com.android.tools.idea.uibuilder.editor.NlPreviewManager$2.run(NlPreviewManager.java:272)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:337)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:327)
at com.intellij.util.ui.update.MergingUpdateQueue.lambda$flush$1(MergingUpdateQueue.java:277)
at com.intellij.util.ui.UIUtil.invokeAndWaitIfNeeded(UIUtil.java:3115)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:288)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:246)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:232)
at com.intellij.util.Alarm$Request.runSafely(Alarm.java:405)
at com.intellij.util.Alarm$Request.access$700(Alarm.java:330)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:371)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:315)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:447)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:431)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:415)
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:817)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:758)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:394)
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 deleted Android Studio 3.3.1 and installed AS 3.2 (with kotlin 1.2.71 included) + " ext.anko_version＝'0.10.7' " in gradle file.
After that, everything worked fine.

Android studio3.1 : Exception in plugin Android Support

I have encountered problems in android studio, I created a project with android studio, and then open the activity_main_dawer.xml file in the menu directory, it will report an error, the error message is as follows, I tried the Clean Project and Rebuild project, the error still exists, How to solve? Thank you.
null
java.lang.NullPointerException
at com.android.tools.idea.uibuilder.scene.LayoutlibSceneManager.getRenderResult(LayoutlibSceneManager.java:602)
at com.android.tools.idea.uibuilder.surface.ScreenViewBase.getResult(ScreenViewBase.java:109)
at com.android.tools.idea.uibuilder.surface.ScreenView.getResult(ScreenView.java:30)
at com.android.tools.idea.uibuilder.menu.NavigationViewSceneView.getPreferredSize(NavigationViewSceneView.java:64)
at com.android.tools.idea.common.surface.SceneView.getPreferredSize(SceneView.java:95)
at com.android.tools.idea.uibuilder.scene.LayoutlibSceneManager.createSceneViewsForMenu(LayoutlibSceneManager.java:265)
at com.android.tools.idea.uibuilder.scene.LayoutlibSceneManager.doCreateSceneView(LayoutlibSceneManager.java:234)
at com.android.tools.idea.common.scene.SceneManager.createSceneView(SceneManager.java:73)
at com.android.tools.idea.common.scene.SceneManager.<init>(SceneManager.java:66)
at com.android.tools.idea.uibuilder.scene.LayoutlibSceneManager.<init>(LayoutlibSceneManager.java:157)
at com.android.tools.idea.uibuilder.surface.NlDesignSurface.createSceneManager(NlDesignSurface.java:145)
at com.android.tools.idea.common.surface.DesignSurface.setModel(DesignSurface.java:281)
at com.android.tools.idea.common.editor.NlEditorPanel.initNeleModelOnEventDispatchThread(NlEditorPanel.java:143)
at com.android.tools.idea.common.editor.NlEditorPanel.lambda$null$4(NlEditorPanel.java:139)
at com.intellij.openapi.project.DumbServiceImpl.lambda$smartInvokeLater$7(DumbServiceImpl.java:366)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:315)
at com.intellij.openapi.application.impl.LaterInvocator$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: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:822)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:650)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:366)
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)

Drag and Drop text in Android Studio editor causes an Exception

I can no longer do a drag and drop on any text in Android Studio 2.3, when I do it, the selected text just disappear, and I get an Exception in the Event Log
Here is a video showing the problem http://recordit.co/lsZuvQluol
And here is the complete stacktrace :
Assertion failed
java.lang.Throwable
at com.intellij.openapi.diagnostic.Logger.assertTrue(Logger.java:158)
at com.intellij.openapi.diagnostic.Logger.assertTrue(Logger.java:167)
at com.intellij.openapi.editor.impl.EditorImpl.lambda$null$11(EditorImpl.java:6497)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:898)
at com.intellij.openapi.editor.impl.EditorImpl.lambda$handleDrop$12(EditorImpl.java:6478)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:129)
at com.intellij.openapi.editor.impl.EditorImpl.handleDrop(EditorImpl.java:6478)
at com.intellij.openapi.editor.impl.EditorImpl$MyTransferHandler.importData(EditorImpl.java:6522)
at javax.swing.TransferHandler.importData(TransferHandler.java:827)
at javax.swing.TransferHandler$DropHandler.drop(TransferHandler.java:1544)
at java.awt.dnd.DropTarget.drop(DropTarget.java:455)
at javax.swing.TransferHandler$SwingDropTarget.drop(TransferHandler.java:1282)
at sun.awt.dnd.SunDropTargetContextPeer.processDropMessage(SunDropTargetContextPeer.java:538)
at sun.lwawt.macosx.CDropTargetContextPeer.processDropMessage(CDropTargetContextPeer.java:143)
at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchDropEvent(SunDropTargetContextPeer.java:852)
at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchEvent(SunDropTargetContextPeer.java:776)
at sun.awt.dnd.SunDropTargetEvent.dispatch(SunDropTargetEvent.java:48)
at java.awt.Component.dispatchEventImpl(Component.java:4744)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processDropTargetEvent(Container.java:4599)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4461)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
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.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:795)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:627)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:387)
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)

Disabling Markdown Navigator plug-in should help.
Bug report:
2.3.4 Breaks drag and drop of text
Another fix is to update to the EAP plug-in version.

Try Clean & Rebuild project. Restarting Android Studio may help.

Android Studio IDE Internal error occurence when trying to run app on device: "NoClassDefFoundError com/jcraft/jsch/JSchException"

This is a strange one that's occuring in Android Studio 2.3.
I have an Oppo A37S connected to the computer. I've made sure USB Debugging is enabled on it, and adb devices confirms that it exists as a connected device.
However, when I clicked Run 'App' (F10) in Android Studio, it doesn't list any devices connected to the computer. When I exited out of the window that was supposed to list the devices, I get an NoClassDefFoundError: com/jcraft/jsch/JSchException error.
Going to Run -> Edit Configurations and changing the target to USB devices doesn't build the project and instead just returns that error.
And I don't even use JSch!
What am I missing?
EDIT: Restarting the ADB server doesn't work either.
EDIT 2: The stacktrace of said error - it also refers to Firebase Testing:
com/jcraft/jsch/JSchException
java.lang.NoClassDefFoundError: com/jcraft/jsch/JSchException
at com.google.gct.testing.android.CloudDeviceNameRenderer.isApplicable(CloudDeviceNameRenderer.java:31)
at com.android.tools.idea.run.ConnectedAndroidDevice.getRendererExtension(ConnectedAndroidDevice.java:201)
at com.android.tools.idea.run.ConnectedAndroidDevice.<init>(ConnectedAndroidDevice.java:56)
at com.android.tools.idea.run.DevicePickerListModel.wrapConnectedDevices(DevicePickerListModel.java:46)
at com.android.tools.idea.run.DevicePickerListModel.reset(DevicePickerListModel.java:36)
at com.android.tools.idea.run.editor.DevicePicker.updateModel(DevicePicker.java:290)
at com.android.tools.idea.run.editor.DevicePicker.lambda$null$1(DevicePicker.java:193)
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:795)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:631)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:387)
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:778)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:455)
at com.intellij.openapi.ui.DialogWrapper.invokeShow(DialogWrapper.java:1665)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1607)
at com.intellij.openapi.ui.DialogWrapper.showAndGet(DialogWrapper.java:1622)
at com.android.tools.idea.run.editor.ShowChooserTargetProvider.showPrompt(ShowChooserTargetProvider.java:100)
at com.android.tools.idea.run.AndroidRunConfigurationBase.getDeployTarget(AndroidRunConfigurationBase.java:475)
at com.android.tools.idea.run.AndroidRunConfigurationBase.getState(AndroidRunConfigurationBase.java:294)
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.BaseProgramRunner.execute(BaseProgramRunner.java:50)
at com.intellij.execution.ProgramRunnerUtil.executeConfiguration(ProgramRunnerUtil.java:118)
at com.intellij.execution.impl.ExecutionManagerImpl.start(ExecutionManagerImpl.java:117)
at com.intellij.execution.impl.ExecutionManagerImpl.access$300(ExecutionManagerImpl.java:67)
at com.intellij.execution.impl.ExecutionManagerImpl$3.run(ExecutionManagerImpl.java:509)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:222)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:378)
at com.intellij.openapi.application.TransactionGuardImpl$6.run(TransactionGuardImpl.java:291)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:326)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:310)
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:795)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:631)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:387)
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)
Caused by: java.lang.ClassNotFoundException: com.jcraft.jsch.JSchException PluginClassLoader[com.google.gct.testing, 1.0]
at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:64)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 64 more
java.lang.NoClassDefFoundError: com/jcraft/jsch/JSchException
at com.google.gct.testing.android.CloudDeviceNameRenderer.isApplicable(CloudDeviceNameRenderer.java:31)
at com.android.tools.idea.run.ConnectedAndroidDevice.getRendererExtension(ConnectedAndroidDevice.java:201)
at com.android.tools.idea.run.ConnectedAndroidDevice.<init>(ConnectedAndroidDevice.java:56)
at com.android.tools.idea.run.DevicePickerListModel.wrapConnectedDevices(DevicePickerListModel.java:46)
at com.android.tools.idea.run.DevicePickerListModel.reset(DevicePickerListModel.java:36)
at com.android.tools.idea.run.editor.DevicePicker.updateModel(DevicePicker.java:290)
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:795)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:631)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:387)
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:778)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:455)
at com.intellij.openapi.ui.DialogWrapper.invokeShow(DialogWrapper.java:1665)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1607)
at com.intellij.openapi.ui.DialogWrapper.showAndGet(DialogWrapper.java:1622)
at com.android.tools.idea.run.editor.ShowChooserTargetProvider.showPrompt(ShowChooserTargetProvider.java:100)
at com.android.tools.idea.run.AndroidRunConfigurationBase.getDeployTarget(AndroidRunConfigurationBase.java:475)
at com.android.tools.idea.run.AndroidRunConfigurationBase.getState(AndroidRunConfigurationBase.java:294)
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.BaseProgramRunner.execute(BaseProgramRunner.java:50)
at com.intellij.execution.ProgramRunnerUtil.executeConfiguration(ProgramRunnerUtil.java:118)
at com.intellij.execution.impl.ExecutionManagerImpl.start(ExecutionManagerImpl.java:117)
at com.intellij.execution.impl.ExecutionManagerImpl.access$300(ExecutionManagerImpl.java:67)
at com.intellij.execution.impl.ExecutionManagerImpl$3.run(ExecutionManagerImpl.java:509)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:222)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:378)
at com.intellij.openapi.application.TransactionGuardImpl$6.run(TransactionGuardImpl.java:291)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:326)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:310)
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:795)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:631)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:387)
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)
Caused by: java.lang.ClassNotFoundException: com.jcraft.jsch.JSchException PluginClassLoader[com.google.gct.testing, 1.0]
at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:64)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 63 more

I had the same issue when testing app on the emulator.
I disabled all Firebase plugins from IDE and it worked.
Here are extra details about my development environment:
Android Studio 2.3
Build #AI-162.3764568, built on February 24, 2017
JRE: 1.8.0_112-release-b06 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Firebase plugin versions:
Firebase App Indexing: 0.1
Firebase Services: 0.1
Firebase Testing: 0.1

In the end, as I said in my second edit, since that Stacktrace turned out to have something to do with Firebase Testing, I disabled it. Now Android Studio properly detects my device.

AS theme editor not showing preview

My AS version is 1.4 in stable chanel. When I'm entering theme editor, I have an empty preview screen.
Still the same problem on 1.5.1, got the stack from event log:
java.lang.NullPointerException
at com.android.tools.idea.configurations.ConfigurationMenuAction$PreviewAction.actionPerformed(ConfigurationMenuAction.java:269)
at com.intellij.ui.popup.PopupFactoryImpl$ActionPopupStep$1.run(PopupFactoryImpl.java:746)
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:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:734)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:569)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:382)
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)