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

预览layout.xml文件时提示：

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

导致无法正常预览布局文件；

问题根源：SDK版本过高，ADT版本低；

解决办法有好几种，如下：

1.

1. Click Help > Install New Software.
2. In the Work with field, enter: https://dl-ssl.google.com/android/eclipse/
3. Select Developer Tools / Android Development Tools.
4. Click Next and complete the wizard. 

2.

Change android version while rendering layout.

3，

Change the Target version to new updates you have. Otherwise, change what SDK version you have in the Android manifest file.

<code style="line-height: 24.5px;">android:minSdkVersion="8"android:targetSdkVersion="18"</code>

另外ADT升级方法

用 SDK Manager 更新下载一些东西之后,Graphical Layout里面就变成空白的啦,而不是显示布局的绘图.同时Eclipse显示下列信息，让你去更新ADT的插件。更就更呗，下面我们来解决这个问题。

点击 Help > Install New Software.
在 Work with 的输入区域里, 输入: https://dl-ssl.google.com/android/eclipse/
选择 Developer Tools / Android Development Tools.
点击 Next 并完成安装.