android - 在android中查询Intent.ACTION_VIEW

Question

在 Intent.ACTION_VIEW 中 Intent 是什么？它是一个类还是方法，这里什么是 ACTION_VIEW ？它是一个变量吗？它的类型是什么？请详细解释。谢谢。

Answer 1

Intent在android中是一个abstract public Class。 ACTION_VIEW 是对 Intent 的操作。

public static final String ACTION_VIEW

Since: API Level 1 Activity Action: Display the data to the user. This is the most common action performed on data -- it is the generic action you can use on a piece of data to get the most reasonable thing to occur. For example, when used on a contacts entry it will view the entry; when used on a mailto: URI it will bring up a compose window filled with the information supplied by the URI; when used with a tel: URI it will invoke the dialer.

Input: getData() is URI from which to retrieve data.

Output: nothing.

Constant Value: "android.intent.action.VIEW"

您需要阅读 Android 开发人员指南。你会得到更好的理解here .