The document describes the development of an Android music player application called Rhythmbox by students under the guidance of Prof. Subhasis Mitra. It discusses the application's features such as playing, pausing and stopping music. It also covers the application's design process including writing classes for audio playback, designing buttons in XML code, and referencing Android media player classes and the Android SDK. The application was tested on an Android emulator version 4.3 and is intended to run on devices with Android 2.3.5 or higher.

2. Developed By..
Shiladitya Basu
Chirag Das
Sumit Balmiki
Subhrojit Das
Sambho Ghosh
Under guidance of Prof. Subhasis Mitra

3. Android Introduction..

4. • Android is an operating system based on the Linux kernel, and designed
primarily for touch screen mobile devices such as Smartphone’s and tablet
computers. Initially developed by Android, Inc., which Google backed
financially and later bought in 2005, Android was unveiled in 2007 along
with the founding of the Open Handset Alliance: a consortium of
hardware, software, and telecommunication companies devoted to
advancing open standards for mobile devices . The first Android-powered
phone was sold in October 2008.
• The user interface of Android is based on direct manipulation, using touch
inputs that loosely correspond to real-world actions, like swiping, tapping,
pinching and reverse pinching to manipulate on-screen objects.
• Android allows users to customize their home screens with shortcuts to
applications and widgets, which allow users to display live content, such as
emails and weather information, directly on the home screen.
Applications can further send notifications to the user to inform them of
relevant information, such as new emails and text messages.

5. • Android is open source and Google releases the code under the Apache
License. This open-source code and permissive licensing allows the
software to be freely modified and distributed by device
manufacturers, wireless carriers and enthusiast developers.
• Android has a large community of developers writing applications ("apps")
that extend the functionality of devices, written primarily in the Java
programming language
• Android is the world's most widely used smart phone platform,[overtaking
Symbian in the fourth quarter of 2010. Android is popular with technology
companies who require a ready-made, low-cost, customizable and
lightweight operating system for high tech devices.
• Despite being primarily designed for phones and tablets, it also has been
used in televisions, games consoles, digital cameras and other electronics.
Android's open nature has encouraged a large community of developers
and enthusiasts to use the open-source code as a foundation for
community-driven projects, which add new features for advanced users or
bring Android to devices which were officially released running other
operating systems.

6. Interface of
Android

7. • Android's user interface is based on direct manipulation , using touch
inputs that loosely correspond to real-world actions, like
swiping, tapping, pinching and reverse pinching to manipulate on-screen
objects. The response to user input is designed to be immediate and
provides a fluid touch interface, often using the vibration capabilities of
the device to provide Haptic Feedback to the user.
• Internal hardware such as accelerometers, gyroscopes and proximity
sensors are used by some applications to respond to additional user
actions, for example adjusting the screen from portrait to landscape
depending on how the device is oriented, or allowing the user to steer a
vehicle in a racing game by rotating the device, simulating control of a
steering wheel.

8. • Android home screens are typically made up of app icons and widgets;
app icons launch the associated app, whereas widgets display live, autoupdating content such as the weather forecast, the user's email inbox, or a
news ticker directly on the home screen.
• A home screen may be made up of several pages that the user can swipe
back and forth between, though Android's home screen interface is
heavily customizable, allowing the user to adjust the look and feel of the
device to their tastes.
• Third-party apps available on Google Play and other app stores can
extensively re-theme the home screen.
• Present along the top of the screen is a status bar, showing information
about the device and its connectivity. This status bar can be "pulled" down
to reveal a notification screen where apps display important information
or updates, such as a newly received email or SMS text, in a way that does
not immediately interrupt or inconvenience the user.

9. Memory Management of
Android OS

10. • Since Android devices are usually battery-powered, Android is designed to
manage memory (RAM) to keep power consumption at a minimum.
• When an Android app is no longer in use, the system will automatically
suspend it in memory – while the app is still technically "open,"
suspended apps consume no resources (e.g. battery power or processing
power)
• Android manages the apps stored in memory automatically: when
memory is low, the system will begin killing apps and processes that have
been inactive for a while, in reverse order since they were last used (i.e.
oldest first).
• This process is designed to be invisible to the user, such that users do not
need to manage memory or the killing of apps themselves

11. Android Versions

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Android 1.0 (API level 1)
• Android 4.3 Jelly Bean (API level
Android 1.1 (API level 2)
18)
Android 1.5 Cupcake (API level 3)
• Android 4.4 KitKat (API level 19)
Android 1.6 Donut (API level 4)
Android 2.0 Eclair (API level 5)
Android 2.1 Eclair (API level 7)
Android 2.2–2.2.3 Froyo (API level 8)
Android 2.3–2.3.2 Gingerbread (API level 9)
Android 2.3.3–2.3.7 Gingerbread (API level 10)
Android 3.0 Honeycomb (API level 11)
Android 3.1 Honeycomb (API level 12)
Android 3.2 Honeycomb (API level 13)
Android 4.0–4.0.2 Ice Cream Sandwich (API level 14)
Android 4.0.3–4.0.4 Ice Cream Sandwich (API level 15)
Android 4.1 Jelly Bean (API level 16)
Android 4.2 Jelly Bean (API level 17)

13. Symbol OF Android OS

14. Our Objective
Our project was “Study the Programming
Environment of Android Based Smart Phone and
Build A Test Application.”
And We thought of Real life application Like music
player(Rhythmbox)….
Purpose :Explains the functional features, design…
Scope : This application can run anonymously in any
Android based Smart-phones , not less than version
2.3.5

15. Rhythmbox
 Android music player Application

16. System Features

17. Start Up
Functional Requirements
 Android operating system on the
Smartphone.
 The target device should be sound
enabled
 The android version should not be
less than 2.3.5

18. Playlist Menu
 Play
 Stop
 Pause

19. External Interface Requirements
User Interface Tested on:
 Android emulator version 4.3
Hardware Requirement:
 Core i3 processor
 4 GB RAM
 500 GB Hard Disk
Software Requirement:
 Android SDK Manager
 Eclipse
 ADT(Android Development Tool)

20. Design
How We Planned The Application

21. User Modules…
Eclipse
ADT(Android
Development Tool)
Android SDK(Standard Development Kit)
Windows 7 (64 bit)

22. Level-0 DFD
User input
Android mp3 player
User
Show result

23. Level-1 DFD
User input for entering into
required OS
Android
OS
User
Taking
instruction
from user
to go to
the next
step
Menu
Show Result
Music
Player
Carrying
instructi
on
receiving
from OS

25. Building Blocks of Android Code
Android media
player class
XML Code
Writing class for reading
mp3,Play,Stop,Pause
Android MP3Player

26. Writing Classes needed for Audio
Player

27. • For Play service:
public void playAudio(View view) {
Intent objIntent = new Intent(this, PlayAudio.class);
startService(objIntent);
}
• For pause Service:
public void pauseAudio(View view) {
Intent objIntent = new Intent(this, PlayAudio.class);
pauseService(objIntent);
}

28. • For Stop Service:
public void stopAudio(View view) {
Intent objIntent = new Intent(this, PlayAudio.class);
stopService(objIntent);
}

29. XML Code Required for button
design

30. • For Button Play:
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="30dp"
android:onClick="playAudio"
android:text="Play"
android:textColor="#00FF00"
android:textStyle="italic"
android:typeface="monospace"
android:bottomRightRadius="150dp"
android:bottomLeftRadius="150dp"
android:topLeftRadius="150dp"
android:topRightRadius="150dp"
/>

31. • For Button pause:
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/button2"
android:layout_marginLeft="16dp"
android:layout_toRightOf="@+id/button2"
android:onClick="pauseAudio"
android:text="Pause"
android:textColor="#006400"
android:textStyle="italic"
android:typeface="monospace"
android:bottomRightRadius="30dp"
android:bottomLeftRadius="30dp"
android:topLeftRadius="30dp"
android:topRightRadius="30dp"
/>

32. • For Button Stop:
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button1"
android:layout_alignBottom="@+id/button1"
android:layout_marginLeft="24dp"
android:layout_toRightOf="@+id/button1"
android:onClick="stopAudio"
android:text="Stop"
android:textColor="#FF0000"
android:textStyle="italic"
android:typeface="monospace"
android:bottomRightRadius="30dp"
android:bottomLeftRadius="30dp"
android:topLeftRadius="30dp"
android:topRightRadius="30dp"/>

33. The android music player

34. List of references we have used:
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http://developer.android.com/index.html
http://www.androiddevelopers.in/
http://www.androidpolice.com/
http://android.wordpress.org/
https://code.google.com/p/connectbot/
http://www.google.co.in/mobile/android/
http://www.lynda.com/(Android development video tutorial)