問題與androidstudio

Question

我是新的android開發，比我安裝的Android工作室和使用視圖或活動我收到以下錯誤時：

enter image description here

the following classes could not be instantiated 
- android.support.design.widget.CoordinatorLayout 
- android.support.design.widget.AppBarLayout 
- android.support.design.widget.FloatingActionButton

Expections Details: 
java.lang.IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library. 
    at android.support.design.widget.ThemeUtils.checkAppCompatTheme(ThemeUtils.java:34) 
    at android.support.design.widget.CoordinatorLayout.(CoordinatorLayout.java:178) 
    at android.support.design.widget.CoordinatorLayout.(CoordinatorLayout.java:172) 
    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:422) 
    at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:458) 
    at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:170) 
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:103) 
    at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:190) 
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:247) 
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:171) 
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:394) 
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:223) 
    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:366) 
    at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:607) 
    at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:629) 
    at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$6.run(AndroidDesignerEditorPanel.java:480) 
    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)

任何人可以請幫忙？
P.S.很抱歉，我的英語

Answer 1

我有同樣的問題，嘗試更改API（你正在使用你的layout API 23），儘量把它放到API 21如果它不工作，嘗試重新啓動Android的工作室。

這就是你如何改變API

欲瞭解更多信息，看看這個question這one

Answer 2

剛剛更新Android工作室的最新版本，也是你的SDK是：Choose File > Settings > Appearance & Behavior > System Settings > Updates.