Android is an open-source software stack for mobile devices that includes an operating system, middleware and key applications. It was developed by Android Inc. which was acquired by Google in 2005. Android has become one of the most widely used mobile operating systems. It allows developers to write Java-based applications that can be published to the Android Market. Android powers many smartphones and tablets. It uses an open architecture that vendors can modify and enhance for their own devices.

1. Android™ Application Development
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2. What is Android™ ?
• Google purchased Android Inc., a 22-month-old
Palo Alto, California, startup in July 2005.
• Android is a software stack for mobile devices
that includes an operating system, middleware
and key applications.

3. Android
• One of the most widely used mobile OS these
days is ANDROID. Android is a software bunch
comprising not only operating system but also
middleware and key applications.
• Android applications are written in java
programming language and It is available as
open source for developers to develop
applications which can be further used for
selling in android market.

4. Android OS Market
In Q2 2009 Android had 2.8% market share which
had grown to 33% market share by Q4 2010 and in
May it’s grow to 50%, which made Android leader
of smart phone OSs worldwide.

5. How Android™ Is Different
• Open for modification.
• This gives vendors the opportunity to change
and enhance their products based on their own
preferences. This has created many versions of
Android™ phones, which can vary by vendor, as
well as a range of other devices that use this
platform.

6. Android System Architecture

7. Different version of Android

8. Basics applications of Android
• Android applications are composed of one or
more application components
(activities, services, content providers, and
broadcast receivers).
• Each component performs a different role in
the overall application behavior, and each one
can be activated individually (even by other
applications)

9. Basics applications of Android
• The manifest file must declare all components
in the application and should also declare all
application requirements, such as the minimum
version of Android required and any hardware
configurations required
• Non-code application resources
(images, strings, layout files, etc.) should
include alternatives for different device
configurations (such as different strings for
different languages)

10. Android Features
• Application Framework that enables reuse and
replacement of components.
• Optimized Graphics that is powered by
customized 2D graphics library and 3D graphics
based on the OpenGL ES 1.0 specification
• Provision of Bluetooth, EDGE, 3G and Wi-Fi .
• SQLite for structured data storage Open source
• Web Kit engine based integrated web browser .

11. Android Features
• Camera, GPS, Compass, and Accelerometer
(dependent on hardware support) GSM
Telephony Dalvik virtual machine optimized for
mobile devices.
• GSM Telephony
• Dalvik virtual machine optimized for mobile
devices .

12. Android's Latest
• Browser: It also supports popular web
standards like CSS 3D, Animations . It also
supports playback of HTML5 video content.
• Gallery: Now the gallery supports PTP (Picture
Transfer Protocol) so that users can directly
connect their cameras with Android device and
transfer pictures with a single touch.

13. Android's Latest
• Email: When replying or forwarding an HTML
message, The Email app now sends both plain
text and HTML bodies as a multi-part mime
message. This ensures that the message will be
formatted properly for all recipients.
• Enterprise support: Users can now configure
an HTTP proxy for each connected Wi-Fi access
point. This lets administrators work with users
to set a proxy hostname, port, and any bypass
sub domains.

14. What is Android Tablet ?
• Tablets are taking the computing world by
storm. They are the latest trend that gives you
internet capabilities, access to email, video
chat and allows you to capture images and
video while on the go.
• These multimedia devices are designed to be
portable, with small dimensions and a
lightweight design. They also give you control
by navigating around the device using the
touchscreen display or stylus pen.

15. Android Tablet
• Ice Cream Sandwich is the new update from
Google to Android mobile operating system and
tablets. It has many new features, which make
it more of a complete revamp than upgrade.
• Android Tablet is very famous in modern world
and people of all profession are using Tablets
for different usages.

16. Android Tablet
• Android Tablet is very famous in modern world
and people of all profession are using Tablets
for different usages.
• There is no mess of maintaining a keyboard
etc, but it is fully integrated with touch screen
functionality and it has LCD screen.
• It is helpful for everyone and its usage totally
depend on person-to-person and their
requirements.

17. Android Cloud to Device Messaging
Framework (C2DM)
• Android Cloud to Device Messaging (C2DM) is
a service that helps developers send data from
servers to their applications on Android devices.
• The service provides a simple, lightweight
mechanism that servers can use to tell mobile
applications to contact the server directly, to
fetch updated application or user data.

18. Cloud to Device Messaging (C2DM)

19. Characteristics of Android Cloud to Device
Messaging (C2DM)
• It allows third-party application servers to send
lightweight messages to their Android
applications.
• An application on an Android device doesn’t
need to be running to receive messages.

20. Characteristics of Android Cloud to Device
Messaging (C2DM)
• It does not provide any built-in user interface
or other handling for message data. C2DM
simply passes raw message data received
straight to the application.
• It uses an existing connection for Google
services. This requires users to set up their
Google account on their mobile devices.

21. Architecture of Android Cloud to Device
Messaging (C2DM)

22. Enabling C2DM
• The first time the application needs to use the
messaging service, it fires off a registration
Intent to a C2DM server.
• If the registration is successful, the C2DM
server broadcasts a REGISTRATION Intent which
gives the application a registration ID. The
application should store this ID for later use.

23. Enabling C2DM
• To complete the registration, the
application sends the registration ID to
the application server. The application
server typically stores the registration ID
in a database.

24. Enabling C2DM
The application must include the id
package name is the unique identifier of
our application on Android.

25. Enabling C2DM
Google's servers will generate a token, the
registration id and return it to the
application.

26. Enabling C2DM
.This token will allow us to send a message from
the content. Once received, it must be sent to
our application server to be stored.

27. Sending a Message
• The application has a registration ID that allows
it to receive messages for a particular device.
• The third-party application server has stored
the registration ID.
• The application server sends a message to C2DM
servers.

28. Sending a Message
• Google enqueue and stores the message in case
the device is inactive.
• When the device is online, Google sends the
message to the device.

29. Receiving a Message

30. Receiving a Message
• The system receives the incoming message and
extracts the raw key/value pairs from the
message payload.
• The system passes the key/value pairs to the
targeted Android application in a
com.google.android.c2dm.intent.RECEIVE
Intent as a set of extras.
• The Android application extracts the raw data
from the RECEIVE Intent by key.

31. Thank You

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