转自
http://www.cnblogs.com/codingblock/articles/4594208.html
service参考
http://www.cnblogs.com/newcj/archive/2011/05/30/2061370.html
sqlite参考
http://blog.csdn.net/jin868/article/details/5959710
http://mobile.51cto.com/android-321850.htm
http://blog.csdn.net/android_tutor/article/details/5654124
android进程间通信
http://blog.csdn.net/stonecao/article/details/6425019
http://blog.csdn.net/singwhatiwanna/article/details/17041691