Android 更新Adt至r.22，给出错误

我已经更新到ADTR.22，现在sdk内容加载器要花很多时间来解决这个问题

现在很好，但是每次我打开一个xml/layout文件，它都会显示4.4.2正在加载，并且在显示布局之前要花费很多时间

我面临的第二个问题是，显示Api 19布局的Api级渲染显示特殊字符而不是文本

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还可以尝试更新sdk构建工具。

最后，谷歌在最新的ADT 22.6.2更新中解决了这些问题

ADT 22.6.2 2014年3月26日

一般说明：

    Fixed a problem where Eclipse was non-responsive for a few seconds after opening an XML file. (Issue 67084)
    Fixed a problem where the SDK Manager threw a NullPointerException after removing a virtual device that was created using the Android Wear system image. (Issue 67588)
    Fixed a problem where the layout preview for large screens in Eclipse showed the resources from the drawable-* directories instead of those from the drawable-large-* directories.
    Fixed a problem with Nexus 5 Android virtual devices created from the command line where the SD card file system was read-only.
    Changed the URL for the Android Developer Tools Update Site from HTTP to HTTPS.