Original: http://blog.sina.com.cn/s/blog_6e334dc70102ve7d.html
Along with the release of Android 5.0, support-v7-appcompat is also updated to V21, which adds controls such as ToolBar, recyclerview, and cardview.
Android5.0 has put a lot of effort into changing the style of the APP, and the writing method is also different from before. Let's briefly introduce the functions of colorAccent, colorPrimary, colorPrimaryDark...: