Android Studio，渲染问题

Question

我刚刚安装了Android Studio，但启动时出现以下提示：

渲染问题：无法实例化以下类：

android.support.design.widget.FloatingActionButton (Open Class, Show Exception, Clear Cache)

 Tip: Use View.isInEditMode() in your custom views to skip code or show sample data when shown in the IDE      
Exception Details    android.content.res.Resources$NotFoundException: Unable to find resource ID #0x1080029 
at android.content.res.Resources.getResourceName(Resources.java:2235)  
at android.content.res.Resources.loadDrawableForCookie(Resources.java:2602)     at android.content.res.Resources.loadDrawable(Resources.java:2540)   
at android.content.res.Resources.getDrawable(Resources.java:806)   
at android.content.Context.getDrawable(Context.java:458)   
at android.support.v4.content.ContextCompatApi21.getDrawable(ContextCompatApi21.java:26)   
at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:321)      
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:180)   
at android.support.v7.widget.TintTypedArray.getDrawableIfKnown(TintTypedArray.java:70)   
at android.support.v7.widget.AppCompatImageHelper.loadFromAttributes(AppCompatImageHelper.java:39)   
at android.support.v7.widget.AppCompatImageButton.<init>(AppCompatImageButton.java:65)   
at android.support.design.widget.VisibilityAwareImageButton.<init>(VisibilityAwareImageButton.java:37)  
at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:109)   
at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:105)   
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)   
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)     
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:835)   
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70)     at android.view.LayoutInflater.rInflate(LayoutInflater.java:811)   
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)    
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)   
at android.view.LayoutInflater.inflate(LayoutInflater.java:394) Copy stack to clipboard 

我该怎么办？

- adrianoBP

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尝试清理和重新构建解决方案，确保您拥有完全的互联网访问权限。Android Studio在第一次渲染时下载内容。 - Sumit Pathak

Answer 1

只需更新SDK即可解决问题。您可以通过Android Studio->帮助->检查更新->点击立即更新或打开SDK文件夹并手动运行'SDK Manager.exe'并更新所有可用的SDK更新来更新SDK。有时候Android Studio会更新，但SDK不会更新。请手动更新SDK。（在桌面上保留“SDK Manager.exe”的快捷方式将是一个有用的提示）。

- sifr_dot_in