Android settings

http://www.bdqn.cn/news/201305/9146.shtml
用来学习settings

https://github.com/voyagewu/AndroidSettingDemoAP/tree/master/src/com/example/android_settings

https://github.com/ParanoidAndroid/android_packages_apps_Settings 

Patterm Lock

学习网址
http://mosthink.net/?p=128

慕课网有很详细的讲解
http://www.imooc.com/learn/308

github
https://github.com/Viyu/LockPattern/tree/master/src/com/viyu/lockpattern
https://github.com/VernonLee/Android-LockPatternDemo