layout下activity_main.xml无法显示界面出现This version of the rendering library is more recent than your versi

出现：

This version of the rendering library is more recent than your version of ADT plug-in. Please update ADT plug-in问题

解决方案：

1. 点击 Help > Install New Software。

2. 在 Work with 的输入区域里, 输入: https://dl-ssl.google.com/android/eclipse/或者将https改成http.

3. 选择 Developer Tools / Android Development Tools.此时把同一页面下的Contact all update sites....前面的复选框去掉，为了加快安装速度。

4. 点击 Next 并完成安装

调节完之后可能出现问题：Exception raised during rendering: Unable to find the layout for Action Bar.

解决办法：切换到design视图，选择低一点的api版本即可。