What is the context in Android and how does it use

This is stackoverflow on the answer of a netizen:

Original address: Http://stackoverflow.com/questions/3572463/what-is-context-in-android

As the name suggests, its the context of the application/object. It lets newly created objects understand what have been going on. Typically you-call it-get information regarding another part of the Your program (activity, Package/application)

You can get the context by invoking getApplicationContext() , getContext() , getBaseContext() or (if in the this activity Class).

Typical uses of context:

• Creating new objects : Creating new views, adapters, listeners:

   1  TextView TV =  TextView (GetContext ( )); 2  listadapter adapter = new 
   Simplecursoradapter (Getapplicationcontext (), ...); 

• accessing Common Resources : Services like Layout_inflater_service, sharedpreferences :

   1  context.getsystemservice (Layout_ Inflater_service)  2  Getapplicationcontext (). Getsharedpreferences (* name*, *mode*); 

   

• Accessing components implicitly : Regarding content providers, broadcasts, intent

　　　　getApplicationContext().getContentResolver().query(uri, ...);

What is the context in Android and how does it use