The document provides an overview of what is required to develop Android applications, including the latest Java Development Kit (JDK), Android Software Development Kit (SDK), an integrated development environment (IDE) like Eclipse, and the Android Development Tools (ADT) plugin for Eclipse. It describes downloading and installing each component, and explains their basic functions. The JDK is needed to compile Java code, the SDK contains libraries and tools, the IDE provides an interface for writing code, and the ADT plugin integrates Android development capabilities into Eclipse. It also outlines the typical project folder structure and key files like the AndroidManifest.xml.
2. What is required for Android application development?
• Latest version of JDK
• Android SDK (Windows/Linux)
• IDE (Eclipse/Anything of your choice)
• Android Eclipse Add-on (ADT)
Dept. of Computer Science and
Engineering
3. JDK or Java JDK
• Java SE development kit
• Its an essential component, because every app are written using
java language
• so, you need to have JDK to compile and generate the java files at
the run time
• download latest version of JDK
• why java only..???
Dept. of computer
Science and Engineering
4. Eclipse
• It is the preferred IDE (integrated development environment)
by the Android team.
• Its multi language software development environment
featuring an extensible plug-in system.
• Download Eclipse of any version on your machine.
• You can download it here www.eclipse.org
• Six editions are available, for all types of OS.
Dept. of Computer Science and
Engineering
5. Android SDK
• Android SDK (software development kit) contains a debugger,
libraries, an emulator, documentation, sample code, and tutorials.
• Android SDK initially contains only the basic tools, It does not
contain all android platforms and platforms tools.
• Therefore, you must install the platform tools and atleast one
version of the Android platform.
•Download Android SDK zip file from:
http://developer.android.com/sdk
Dept. of Computer Science and
Engineering
6. Android emulator
• Android SDK Includes a mobile device emulator.
• Its virtual mobile device that runs on your computer, The
emulator lets you develop & test android apps without using a
physical device.
• So, you have to create AVDs (Android Virtual device), these are
emulator instances.
• you can create as many AVDs you want in order to test your
app with different configurations.
Dept. of Information Science and
Engineering
7. ADT (android development tools)
• Its an extension for eclipse IDE.
• Its a custom plug-in offered by android.
• Designed to give powerful, integrated environment in which
you can build android apps.
• It extends the capabilities for eclipse to let you quickly set up
Android projects.
Dept. of Information Science and
Engineering
19. DDMS
• Android ships with a debugging tool called the Dalvik Debug
Monitor Server (DDMS).
• When DDMS starts, it connects to android debug bridge (this
lets us communicate with an emulator instance or connected
android device).
• When a device is connected, a VM monitoring service is
created between adb and DDMS, which notifies DDMS when
a VM on the device is started or terminated.
• Once a VM is running, DDMS retrieves the the VM's process
ID (pid), via adb, and opens a connection to the VM's
debugger, through the adb daemon (adbd) on the device.
• DDMS can now talk to the VM using a custom wire protocol.
Dept. of Computer Science and
Engineering
21. Running DDMS
• DDMS is integrated into Eclipse and is also shipped in the
tools/ directory of the SDK. DDMS works with both the
emulator and a connected device. If both are connected and
running simultaneously, DDMS defaults to the emulator.
• From eclipse: Click Window -> Open Perspective -> Other…
-> DDMS
Dept. of Information Science and
Engineering
22. Logcat:
• The Android logging system provides a mechanism
for collecting and viewing system debug output.
• Logs from various applications and portions of the
system are collected in a series of circular buffers,
which then can be viewed and filtered by the logcat
command.
• You can use logcat from an ADB shell to view the
log messages.
Dept. of Computer Science and
Engineering
23. Contents of Project Folder
Project name- Folder name
1.1 src
1.2 Android 2.1
1.3 gen
1.4 assets
1.5 res
1.6 AndroidManifest.xml
1. 1 src-> package folder-> java file (activity name)
contains the java file, which contains the application code.
This is something that the user can do, translated into program. It
corresponds to a screen.
1.2 Android 2.1 -> this folder has all the default packages of the particular
version of android,. i.e which contains all the class libraries needed for
android application
Dept. of Computer Science and
Engineering
24. 1.3 gen -> contains r.java file, a compiler generated file that references all
the resources found in your project.
1.4 assets -> this folder contains all the assets used by your application, such
as HTML, text files, databases, etc.
Dept. of Information Science and
Engineering
25. 1.5 Res- This folder contains the images which are being used and
UI layout.
1. drawable: intended for drawing (HDPI, MDPI, LDPI)
2. Layout: main.xml
This contains the GUI design for the android
application.
GUI can be done by either writing the xml code , or by
drag and drop option.
3. Values: Strings.xml
Contains String and theme elements
Dept. of Computer Science and
Engineering
26. 1.6 AndroidManifest.xml
• This contains the following tabs Manifest, Application, Permission,
Instrumentation and AndroidManifest.xml
• This contains the package name, android version name, SDK version.
• Any new activity is added, then it has to be declared over here.
• This defines the components of the application and their
relationships. It gives the permissions to components of the
application as to what it can do with users.
• 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
Dept. of Computer Science and
Engineering
27. Lunch Break
Dept. of Computer Science and
Engineering
