Android :: OS Push Information About Network Connecting Status To Application?

I need some advices about the Android OS and application.i wonder if the Android OS is able to push network connecting status to applications.(I found applications can get a network connecting status from android OS. But I can't find reverse cases.)However, I am thinking android OS may push network connecting status to applications.when application is installed on android os, is it possible to register something for monitoring phone's network status on android os.Because I want my application can receive phone's network status from android os.(not by asking directly to android os.) It means: when phone's network status changes, does android os automatically informs phone's network status to application?I'm sorry my English writing is bad TT;