Tutorial - 8

http://www.youtube.com/watch?v=eKXnQ83RU3I

http://hatsukiakio.blogspot.tw/2009/05/findviewbyidnullandroid.html

http://blog.csdn.net/harry_helei/article/details/5911658

http://www.2cto.com/kf/201204/127405.html

http://developer.android.com/reference/android/view/View.html