http://www.eoeandroid.com/thread-262615-1-1.html

http://blog.csdn.net/guitk/article/details/7057155

http://blog.csdn.net/android_tutor/article/details/7193090

http://blog.csdn.net/loongggdroid/article/details/9665477

dispatchTouchEvent,onTouchEvent与onInterceptTouchEvent的理解