Rendering Problems The following classes could not be found:

– android.support.v7.internal.app.WindowDecorActionBar (Fix Build Path, Create Class) Tip: Try to build the project.

问题如图：

解决方案：

The Actionbar has been deprecated and replaced by Toolbar. That being said, you can do the following if you want to continue using Actionbar for now:

1、Open styles.xml in the values folder inside the res folder.

2、Add the word Base to the beginning of the theme name so that it reads “Base.Theme.AppCompat.Light.DarkActionBar”

I had the same issue today and this solution worked for me. FYI I am in Android Studio though, but hopefully the solution is similar for Eclipse.

即：

styles.xml 文件中 Theme.AppCompat.Light.DarkActionBar 前添加Base.

<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

改后如图：