Answer :
Explanation :

- Notification messages to the user from an Android enabled device can be displayed using Intents. - There are two types of Intents - Explicit Intent, Implicit Intent.   Implicit Intent: - In case of Implicit Intent, an intent is just declared.  - It is for the platform to find an activity that can respond to it. - Since the target component is not declared, it is used for activating components of other applications.   Explicit Intent - Explicit intent specifies the particular activity that should respond to the intent.  - They are used for application internal messages.