android - 请解释一下 Android 中的 Context 类

Question

我是 Android 新手。有人可以向我解释上下文类/对象的概念吗？这是什么？它会用来做什么？为什么要使用 Context 类？

Answer 1

你见过android developer's guide吗？ ？它将回答您的问题:

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.

Context 有很多功能，但作为开发人员，您主要使用它来加载和访问应用程序资源。