[2014-12-03 11:49:13 - android-support-v7-appcompat] E:\my project\android\android-support-v7-appcompat\res\values-v21\styles_base.xml:75: error: Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ActionButton'.
[2014-12-03 11:49:13 - android-support-v7-appcompat] E:\my project\android\android-support-v7-appcompat\res\values-v21\themes_base.xml:191: error: Error: No resource found that matches the given name: attr 'android:colorPrimaryDark'.
[2014-12-03 11:49:13 - android-support-v7-appcompat]
解决办法：
将文件project.properties中的
target=android-19
改为
target=android-21
后clean
即可解决
来自：http://blog.sina.com.cn/s/blog_b7688a6e0102v6z2.html
gradle参考：
http://www.th7.cn/Program/Android/201410/301583.shtml