android - Difference between getContext() , getApplicationContext() , getBaseContext() and "this"

What is the difference between getContext() , getApplicationContext() , getBaseContext() , and "this"?

Though this is simple question I am unable to understand the basic difference between them. Please give some easy examples if possible.

Answer

• View.getContext(): Returns the context the view is currently running in. Usually the currently active Activity.




• Activity.getApplicationContext(): Returns the context for the entire application (the process all the Activities are running inside
  
  of). Use this instead of the current Activity context if you need a
  context tied to the lifecycle of the entire application, not just the
  current Activity.




• ContextWrapper.getBaseContext(): If you need access to a Context from within another context, you use a ContextWrapper. The
  Context referred to from inside that ContextWrapper is accessed via
  getBaseContext().