Four kings of the Android platform: Activity, Service, ContentProvider, Broadcastreceiver

Today began to self-study Android, just see Baidu know above this paragraph, feel good (but already is the August 2011 answer):

Android phone every screen you can see is an activity, it is like a canvas, as you paint on the top, draw a button, draw a picture, draw a list, all with you! Professional point in fact, activity is the container of a derived class of view class (such as button, Listview,imageview).

Android platform Four kings: Activity, Service, ContentProvider, broadcastreceiver, these four kinds of components through intent communication, intent is a bridge!

Android is running on Linux kernel, each app has its own process, Google's engineers in order to simplify the development of the app developers, the process related things are done at the bottom, the storm leak to the app developers is the four kings and a bridge!

Four kings of the Android platform: Activity, Service, ContentProvider, Broadcastreceiver