Today the Crazy Android Intent (intentions) this chapter looked. Summed up some of the points of knowledge

Intent---to express his intentions

can be activated via Intent (activity, service, Broadcastreceiver)
Intent is an important medium for communication between program components

A intent object can contain only one action

Intent properties: Component, Action, Category, Data, Type, Extra, Flag
|---Component
Used to specify the target component that needs to be started
Component property needs to accept a ComponentName object
ComponentName: You need to specify the package name and class name
The component property is specified explicitly which component to start (explicit intent)
|---Flag
For carrying data that needs to be exchanged

|---Action represents the abstract "action" that intent is going to complete.

|---Category to add additional category information to the action

|---data that is used to provide an action to the Action property to accept a (Uri) object
|
|----URI object is represented by a string
Content://com.android.contacts/contacts/1
Uri string Format specification: Scheme://host:port/path scheme ==> content host===>com.android.contacts port (omitted) PATH===>CONTAC Ts/1

|---Type the object MIME type used to specify the URI can be customized in MIME type format: (ABC/XYZ)

|---Extra Extra property is used for data exchange between multiple actions

| The---Flag flag property is used to add some additional control flags to the intent
|
|-----commonly used flag flags
|
|----Flag_activity_brought_to_front (activity will be activated directly from the activity stack the next time it is started by Flag_activity_brought_to_front. Into the top of the stack)

<intent-filter> contained sub-elements
1.<action>
2.<category>
3.<data>

Today the Crazy Android Intent (intentions) this chapter looked. Summed up some of the points of knowledge