getContext(), getApplicationContext(), getBaseContext()区别

最新推荐文章于 2023-04-24 17:27:53 发布

转载最新推荐文章于 2023-04-24 17:27:53 发布 · 751 阅读

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本文详细介绍了Android应用中Context的使用方式，包括View.getContext()、Activity.getApplicationContext()、ContextWrapper.getBaseContext()的区别和应用场景。

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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().

getApplicationContext() - Returns the context for all activities running in application.

getBaseContext() - If you want to access Context from another context within application you can access.

getContext() - Returns the context view only current running activity.

转自: stackoverflow