Android For Beginners

Lecture Details

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This android tutorial will talk about the main building blocks of Android.
These are the various components that are behind Android Applications.

Like

Activity,
Intents,
Services,
Content Providers
Broadcast Receivers.

Application Components
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Application components are the essential building blocks of an Android application. Each one is a unique building block that helps define your applications overall behavior.

There are four different types of application components explained below

Activities
An activity represents a single screen with a user interface.
For example, Your status updates page on Facebook is one Activity, your messages page is another Activity on Facebook. Each Activity is independent of the others.

Services
A service runs in the background to perform long-running operations and it dont require a user Interface. For example, Music Player plays music in the background.

Content providers
You can store the data in SQLite, on web etc. using Content Providers. For example, All your phone contacts are managed by Content Provider whether you save them on Google account or locally on the device.

They are very useful when you dont want to share your data with other components,

Broadcast receivers
A broadcast receiver responds to system announcements. For example, low battery, screen has turned off, or capturing a picture.


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