Intent usage intent (2)

Intent serves as a bond between activities, and its function is not only limited to simple data transmission. Its built-in attributes allow you to conveniently complete many complex operations. For example, you can directly call the dial-up function and automatically call appropriate programs to open different types of files.

Category:

The category attribute is used to specify the stage in which the current action is executed. Use the addcategory () method or set it in the androidmanifest. xml file of the configuration file. Default Value: category_default.

Constant name	Meaning
Category_default	In the Android system, the default execution method is normal activity execution.
Category_alternative	Specify the action to be performed as an option for the default action to be executed on a specific data type (for example, the default action of a contact is to view its information, the optional action is to edit the information)
Category_car_dock	Run the activity when the mobile phone is inserted into the car base (hardware ).
Category_car_mode	You can set this activity to be used in a vehicle-mounted environment.
Category_assist_dock	Run the activity when the mobile phone is inserted into the desktop base (hardware ).
Category_preference	Set this component to preference.
Category_development_preference	Activity is a set panel
Category_embed	It can run in the activity container.
Category_framework_instrumentation_test	Code used as a test instrument test framework
Category_home	Set this component to home activity.
Category_launcher	Set this component to the activity with the highest priority in the current application initiator. It is usually used with the entry action_main (action.
Category_browsable	You can set this component to start in a browser.
Category_gadget	This component can be embedded in another activity.
Reprinted please indicate the source => csdn fat Tiger: http://blog.csdn.net/ljphhj
Category_info	Used to provide package information
Category_monkey	It can be executed by monkey or other test tools.
Category_openable	Indicates the intent of an action_get_content object. It is expected that contentresolver. openinputstream can open the URI.
Category_sample_code	Used as a simple code example (this is generally not used by users)
Category_selected_alternative	Set whether this activity can be considered a selectable action for the user's currently selected data (for plug-in extension: http://www.cnblogs.com/xirihanlin/archive/2009/07/31/1536055.html)
Category_tab	Used in a tabactivity
Category_test	For general test sample programs (not required by General Users)
Category_unit_test	For Unit Testing

Intent usage intent (2)