Android ActivityApplicationService的上下文是否属于同一个应用程序？

概述假设Application中的getApplicationContext和AbstractThreadedSyncAdapter中的getContext返回相同的对象是否安全？我们从活动,服务获取上下文的其他情况怎么样….都属于同一个应用程序.谢谢. 不,他们不是.这是jist： Application – is a singleton instance running in your appli 假设Application中的getApplicationContext和AbstractThreadedSyncAdapter中的getContext返回相同的对象是否安全？我们从活动,服务获取上下文的其他情况怎么样….都属于同一个应用程序.谢谢.解决方法 不,他们不是.这是jist：

Application – is a singleton instance running in your application
process. It can be accessed via methods like getApplication() from an
Activity or Service,and getApplicationContext() from any other object
that inherits from Context. Regardless of where or how it is
accessed,you will always receive the same instance from within your
process.

Activity/Service – inherit from Contextwrapper which implements the
same API,but proxIEs all of its method calls to a hIDden internal
Context instance,also kNown as its base context. Whenever the
framework creates a new Activity or Service instance,it also creates
a new ContextImpl instance to do all of the heavy lifting that either
component will wrap. Each Activity or Service,and their
corresponding base context,are unique per-instance.

这篇文章真的有助于清除它：https://possiblemobile.com/2013/06/context/

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