1. It is used to Start an Activity Start a Service Deliver a Broadcast
Intents
It is used to
Start an Activity
Start a Service
Deliver a Broadcast

2. Explicit Intent Implicit Intent
Intent Types
Explicit Intent
Implicit Intent

3. Explicit Intents
Specify the component to start by name (fully quailed name)
Typically used to start activities within the same application or to start a service in response to user interaction
When you create an explicit intent to start an activity or service, the system immediately starts the app component specied in the Intent object

4. Implicit Intents
Do not specify a specic component but instead declare a general action to perform
The system figures out the appropiate app/activity to handle it
For example, opening Google Maps to show the location from your app or Share or Phone.

5. Resolution of Implicit Intents
Activity A creates an Intent with an action description and passes it to startActivity().
The Android System searches all apps for an intent filter that matches the intent. When a match is found
The system starts the matching activity (Activity B) by invoking its onCreate() method and passing it the Intent

6. Building an Intent
Component Name The name of the component to start. Critical for Explicit Intents
Action A string that species the generic action to perform (such as view or pick)
Data The URI object that references the data to be acted on and/or the MIME type of that data
Category A string containing additional information about the kind of component that should handle the intent
Extras Key-value pairs that carry additional information required to accomplish the requested action
Flags Flags defined in the Intent class that function as metadata for the intent

7. Questions ?