What is the "context" meaning in Android? [duplicate]

This question already 开发者_Go百科has answers here: Closed 11 years ago.

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What is Context in Android?

I think its a very interesting question: What is the "context" meaning/concept in Android ?

Almost any things/object need context to working properly. What is the "context" represented? An integer ? a block of memory ?? or .....

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Interface to global information about an application environment. This is an abstract class whose implementation is provided by the Android system. It allows access to application-specific resources and classes, as well as up-calls for application-level operations such as launching activities, broadcasting and receiving intents, etc.

Source: http://developer.android.com/reference/android/content/Context.html