android action pick,[Android] ACTION_GET_CONTENT与ACTION_PICK的区别

Activity Action: Allow the user to select a particular kind of data and return it. This is different than

There are two main ways to use this action: if you want a specific kind of data, such as a person contact, you set the MIME type to the kind of data you want and launch it with

You may also be interested in any of a set of types of content the user can pick. For example, an e-mail application that wants to allow the user to add an attachment to an e-mail message can use this action to bring up a list of all of the types of content the user can attach.

In this case, you should wrap the GET_CONTENT intent with a chooser (through

When using such a broad GET_CONTENT action, it is often desirable to only pick from data that can be represented as a stream. This is accomplished by requiring the

Callers can optionally specify

Input:

Output: The URI of the item that was picked. This must be a content: URI so that any receiver can access it.