Android-context Understanding

After studying Android, I still don't understand the usage of the Context: API Document Link http://wear.techbrood.com/reference/android/content/Context.html

A very good video: Http://www.tudou.com/programs/view/DtRZxB868TE

(I really don't understand.) can go to see the video)

Context what is he? What's the effect?

1. Environment variables, 2. Handle, 4 up and down text.

There are many classes that inherit the context class:

The implementation class of the context class is CONTEXTIML, which implements the function of the context class. Note that most of the functions of this function are called directly

Android-context Understanding