6 Months Industrial Training In Android in Chandigarh

ANDROID

What is Android Project Structure

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Android Training In Chandigarh Arcadian learning is an Initiative of Arcadian Technocrats Consultancy Services Pvt Ltd based in

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Android Apps Built using Java and new SDK libraries

No support for some Java libraries like Swing & AWTOracle currently using Google over use

Java code compiled into Dalvik byte code (.dex)Optimized for mobile devices (better memory management,

battery utilization, etc.)

Dalvik VM runs .dex files


Building and running

ADB is a client server program that connects clients on developer machine to devices/emulators to facilitate development.

An IDE like Eclipse handles this entire process for you.


What is SDK ?

A software development kit (SDK or "devkit“) is typically a set of software development tools that allows for the creation of applications for a certain software package, software framework, hardware platform, computer system, video game console, operating system or similar development platform.


Android Development Kit Android Development Tools (ADT) is a plug-

in for the Eclipse IDE or Android Studio that is designed to give you a powerful, integrated environment in which to build Android applications.

ADT extends the capabilities of Eclipse to let you quickly set up new Android projects, create an application UI, add packages based on the Android Framework API, debug your applications using the Android SDK tools, and even export signed (or unsigned) .apk files in order to distribute your application.


What is Emulator ? The Android SDK includes a virtual mobile device emulator

that runs on your computer. The emulator lets you prototype, develop and test Android applications without using a physical device.

The Android emulator mimics all of the hardware and software features of a typical mobile device, except that it cannot place actual phone calls. It provides a variety of navigation and control keys, which you can "press" using your mouse or keyboard to generate events for your application. It also provides a screen in which your application is displayed, together with any other active Android applications.


What is AVD ?

An Android Virtual Device (AVD) is an emulator configuration that lets you model an actual device by defining hardware and software options to be emulated by the Android Emulator.

The easiest way to create an AVD is to use the graphical AVD Manager, which you launch from Eclipse or Android Studio by clicking Window > AVD Manager. You can also start the AVD Manager from the command line by calling the android tool with the avd options, from the <sdk>/tools/ directory.


What is DDMS

Android ships with a debugging tool called the Dalvik Debug Monitor Server (DDMS), which provides port-forwarding services, screen capture on the device, thread and heap information on the device, logcat, process, and radio state information, incoming call and SMS spoofing, location data spoofing, and more. This page provides a modest discussion of DDMS features; it is not an exhaustive exploration of all the features and capabilities.


How to Build An Android Apps Android applications are primarily written in the Java

programming language. The Java source files are converted to Java class files by the Java compiler.

The Android SDK contains a tool called dx which converts Java class files into a .dex (Dalvik Executable) file. All class files of one application are placed in one compressed .dex file. During this conversion process redundant information in the class files are optimized in the .dex file. For example if the same String is found in different class files, the .dex file contains only once reference of this String.


Cont . . . These dex files are therefore much smaller in size than the

corresponding class files. The .dex file and the resources of an Android project, e.g. the images

and XML files, are packed into an.apk (Android Package) file. The program aapt (Android Asset Packaging Tool) performs this packaging.

The resulting .apk file contains all necessary data to run the Android application and can be deployed to an Android device via the adb tool.

The Android Development Tools (ADT) performs these steps transparently to the user.

If you use the ADT tooling you press a button the whole Android application (.apk file) will be created and deployed.


Android File Structurewww.arcadianlearning.com

Cont . .

src / Contains your stub Activity file, which is stored at src / your package / namespace /ActivityName.java. All other source code files (such as .java or .aidl files) go here as well.

bin/ Output directory of the build. This is where you can find the final .apk file and other

compiled resources

gen/Contains the Java files generated by ADT, such as your R.java file and interfaces created from AIDL files.


Cont . . .

assets/This is empty. You can use it to store raw asset files. Files that you save here are compiled into an .apk file as-is, and the original filename is preserved. You can navigate this directory in the same way as a typical file system using URIs and read files as a stream of bytes using the Asset Manager. For example, this is a good location for textures and game data.

res/Contains application resources, such as drawable files, layout files, and string values.


Cont . . .

anim/For XML files that are compiled into animation objects. See the Animation resource type.

color/For XML files that describe colors. See the Color Values resource type.

layout/XML files that are compiled into screen layouts (or part of a screen).


Cont . . .

drawable/This part having Android structure containing the images of different type device type.

color/For XML files that describe colors for the text and also .

layout/For XML files that are compiled into front face design of application or structure


Cont . . .

menu/This part having Android structure containing definition menu on the android devices.

values/This part having Android structure containing object (string name) or text definition of the text that used in android application.

lib/This part having Android structure containing library defintion used in the project according to API level.


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Date post:	04-Nov-2014
Category:	Education
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6 Months Industrial Training In Android in Chandigarh

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