This document provides an overview of setting up an Android development environment and creating a basic "Hello World" application. It discusses downloading the Android SDK and Eclipse IDE, installing required plugins, configuring the development environment, using the Android Virtual Device Manager to create emulators, and walking through the steps to generate a new Android project and basic activity. The project anatomy is also outlined, including key files and folders for resources, code, and manifest configuration.

1. Android Training
By: Adham Enaya
twitter : @adhamenaya
fb.: adham.enaya
a.it@hotmail.com

2. Session 2: Prepare Android
Development Environment
Sunday, March 27, 2012

3. Downloading development
environment
• Eclipse IDE(Google-supported)
– Download: http://www.eclipse.org/downloads
• Android SDK
– SDK Manager
– Android Platform
– SDK samples …etc.
– Emulator and debugger
– Download: http://developer.android.com/sdk/index.html
• Android Development Tools(ADT)
– Install plug-in: http://dl-ssl.google.com/android/eclipse
Open source Training (Android Course)
March 29, 2012
Adham Enaya

4. Configuring the development
environment
1. Installing the ADT plug-in:
– Go to Help menu in eclipse -> Choose Install new
software -> Add -> Set the name and location of
the plug-in .
2. Go to Window -> Preferences.
3. Select Android -> Set the location of android
SDK folder.
Open source Training (Android Course)
March 29, 2012
Adham Enaya

5. Android SDK & AVD Manager
• Helps to:
– Browse the installed packages.
– The available packages to install.
– To create Android virtual devices
– It is connected directly with Google servers to
install packages from them.
– You can download :
• Android platforms, documentation, samples tools..
• Third party Add-ons, i.e. Google APIs to use Google
Maps in the application.
Open source Training (Android Course)
March 29, 2012
Adham Enaya

6. Creating Android Virtual Device (AVD)
• AVD: is and emulator instance modeling the
actual device.
1. Go to window -> Android SDK and AVD
Manger.
2. Select Virtual Devices-> enter the AVD
properties:
1. Device name.
2. Target platform ( i.e. Android 2.3- level 9).
3. You can choose a specific hardware(i.e.
Open source Training (Android Course)
March 29, 2012
Adham Enaya

7. Create Hello World Application (1)
• In Eclipse -> New -> Project -> Android
Project.
• Enter Project Name.
– Choose Create New Project in workspace.
• Choose the build target ( The android
platform you app runs on !)
• Click Next.

8. Create Hello World Application (2)
• Enter Application info:
– Application Name ( User-friendly name).
– Package Name (At least 2 identifiers i.e
adham.android).
– Check create Activity to create a UI for the
application.
– Set the Minimum SDK that you app will run on.
– Finish !

9. Project Anatomy (1)
• src : a folder contains on the java source code
for the project.
• R.java in gen folder:
– R.java is eclipse generated java file.
– We will not modify it anytime!
– Contains memory references for all project
resources i.e. :
• GUI objects, layout, strings values.
– Helps in accessing the res objects easily.

10. Project Anatomy (2)
• Android 2.3: jar files contains the core android
libraries.
• assets: contains the resources for the
application i.e. database or external file.
• bin: contains any external libraries.

11. Project Anatomy (3)
• res:
– drawable : contains the images for the application
i.e. application icon.
– drawable-hdpi : contains images for high
definition screens.
– drawable-ldpi : contains images for low definition
screens.
– drawable-mdpi : contains images for medium
definition screens.

12. Project Anatomy (4)
• layout: contains the xml- definition for the
GUI layout and it’s components.
• values : contains the xml files the represents
the constants values for the application i.e.
strings.xml to store all constant strings.

13. Project Anatomy (4)
• AndroidManifest.xml: contains all information
about the application.
– The package name of the application.
– Application version (<major>.<minor>.<point> )
– Application icon.
– Application name from strimgs.xml.
– android:minSdkVersion: specifies the minimum
version of the OS on which the application will
run.

14. Project Anatomy (5)
– Definition of all activities in the application.
• The action for the intent filter is named
android.intent.action.MAIN to indicate that this
activity serves as the entry point for the
application.
• The category for the intent-filter is named
android.intent.category.LAUNCHER to indicate
that the application can be launched from the
device’s Launcher icon.

15. Any Question ?
Best, 
Open source Training (Android Course)
March 29, 2012
Adham Enaya