Rendering Problemsといわれ、Previewが出なくなりました。

出てたメッセージは下記の通り。

Exception raised during rendering: com.android.ide.common.rendering.api.LayoutlibCallback.getXmlFileParser(Ljava/lang/String;)Lorg/xmlpull/v1/XmlPullParser;

詳細は下記の通り。

java.lang.NoSuchMethodError: com.android.ide.common.rendering.api.LayoutlibCallback.getXmlFileParser(Ljava/lang/String;)Lorg/xmlpull/v1/XmlPullParser;
	at com.android.layoutlib.bridge.impl.ResourceHelper.getInternalComplexColor(ResourceHelper.java:146)
	at com.android.layoutlib.bridge.impl.ResourceHelper.getColorStateList(ResourceHelper.java:231)
	at android.content.res.BridgeTypedArray.getColorStateList(BridgeTypedArray.java:308)
	at android.widget.TextView.<init>(TextView.java:776)
	at android.widget.TextView.<init>(TextView.java:705)
	at android.widget.TextView.<init>(TextView.java:701)
	at com.android.layoutlib.bridge.MockView.<init>(MockView.java:50)
	at com.android.layoutlib.bridge.MockView.<init>(MockView.java:45)
	at com.android.layoutlib.bridge.MockView.<init>(MockView.java:41)
	at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:163)
	at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
	at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:858)
	at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70)
	at android.view.LayoutInflater.rInflate(LayoutInflater.java:834)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
	at com.android.layoutlib.bridge.bars.CustomBar.<init>(CustomBar.java:95)
	at com.android.layoutlib.bridge.bars.StatusBar.<init>(StatusBar.java:67)
	at com.android.layoutlib.bridge.impl.Layout.createStatusBar(Layout.java:222)
	at com.android.layoutlib.bridge.impl.Layout.<init>(Layout.java:144)
	at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:213)
	at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:426)
	at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
	at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:510)
	at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:498)
	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:888)
	at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:498)
	at com.android.tools.idea.rendering.RenderTask.access$600(RenderTask.java:72)
	at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:610)
	at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:607)
	at com.android.tools.idea.rendering.RenderService.runRenderAction(RenderService.java:362)
	at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:607)
	at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:629)
	at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.doRender(AndroidLayoutPreviewToolWindowManager.java:652)
	at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.access$1700(AndroidLayoutPreviewToolWindowManager.java:80)
	at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager$7$1.run(AndroidLayoutPreviewToolWindowManager.java:594)
	at com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:152)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:452)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:402)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:137)
	at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager$7.run(AndroidLayoutPreviewToolWindowManager.java:589)
	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$2.run(MergingUpdateQueue.java:254)
	at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)
	at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
	at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
	at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
	at com.intellij.util.Alarm$Request$1.run(Alarm.java:351)
	at java.util.concurrent.Executors$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)

に書いてあったとおり、右上で"N"になっているところを、"23"になるように、プルダウンから"Android23: Android 6.0"にしたら直りました。

（検索しても、あんまり出てこないのは、遭遇している人少ないからでしょうか？）