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❑ ACTION_ANSWER

Open an Activity to handle incoming calls. At present, it is handled by the local telephone dialing tool.

❑ ACTION_CALL

Start the phone dialing tool and immediately initiate a call with the number in the data URI. Generally speaking, if possible, it thinks it is a better way than using Dial_Action.

❑ ACTION_DELETE

Launch an Activity to allow you to delete the data entry stored in the URI location.

❑ ACTION_DIAL

Start a phone dialer and dial using the number preset in the data URI. By default, it is handled by the Android local phone dialing tool. This dialing tool regulates most numbers; for example, tel:555-1234 and tel: (212) 555-1212 are valid numbers.

❑ ACTION_EDIT

Request an Activity to edit the data at URI.

❑ ACTION_INSERT

Open an Activity that inserts a new item at a specific cursor in the data field. When called as a child Activity, it must return the URI of the newly inserted project.

❑ ACTION_PICK

Launch a sub-Activity to let you pick a project from the URI data. When closed, it must return the URI that points to the selected project. The Activity you start depends on the data you want to pick; for example, passing in content://contacts/people will trigger a local contact list.

❑ ACTION_SEARCH

Start a UI to perform the search. Use the SearchManager.QUERY key value in the Intent packet to provide a string of search content.

❑ ACTION_SENDTO

Start an Activity to send a message to the specified contact in URI.

❑ ACTION_SEND

Start an Activity to send specific data (the receiver chooses by parsing the Activity). Use setType to set the type of Intent to the type of mime that transmits data.

The data itself depends on the type and is stored using EXTRA_TEXT or EXTRA_STREAM. In the case of e-mail, Android native applications can also accept extras using EXTRA_EMAIL, EXTRA_CC, EXTRA_BCC, and EXTRA_SUBJECT keys.

❑ ACTION_VIEW

The most common action. The View action requires the data in the Intent URI to be displayed in the most reasonable manner. Different applications will process View requests, depending on the data in URI. In general, the http: address opens in the browser, the tel: address opens in the dialing tool and the number is called, the geo: address is displayed in the Google map application, and the contact content is displayed in the contact Manager.

❑ ACTION_WEB_SEARCH

Open an Activity and perform a web search based on the text in the data URI.

Like these Activity actions, the Android native application also includes a large number of Broadcast actions that are used to create Intent to notify the application of system messages.

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