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HELLO I'M NITENDRA THAKUR|WELCOME TO MY PERSONAL BLOG|I LOVE TO DO CREATIVE THINGS|I'M PROFESSIONAL ANDROID APPLICATION DEVELOPER

Android Development Environment

Android Development Environment

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Perquisites of Android Development .

To get started building Android apps, download the Eclipse for java support  , JDK 1.6 or later and ADT Plugin From this page, click the link to download the Android SDK. The button on the right should indicate the ADT bundle for your operating system, Windows, Mac, or Linux. When you click the button, you'll be shown the terms and conditions, the license agreement for this free software.

After reading through the terms and conditions, if you agree with them, check the appropriate check box. Then, if you're working on Windows, you'll need to choose either 32 or 64 bit software. If you're working on Mac OS 10, you'll only have 64 bit software available. I'm working on a 64 bit version of Windows, so I'll choose 64 bit and click to download link. You can download the bundle anywhere on your desktop. It'll be downloaded as a fairly large ZIP file.

To start up Eclipse for the first time, double click Eclipse with the Eclipse icon. When you launch Eclipse, you'll be asked to choose a work space. In Eclipse vocabulary, a workspace is a folder that keeps track of your projects. Typically, you'll place the projects as subfolders within the workspace. But you don't have to. They can actually go anywhere on your hard disk.The default location for the workspace folder is named workspace. And on Windows, it's placed under the home directory, and on Mac under the documents directory.
You can accept this default name, or you can use your own custom name. I'll create a work space named AndroidSDKws for work space. I'll click OK, and that starts up Eclipse. The first time you open Eclipse with the ADT, you'll see this screen, asking if you want to contribute usage statistics. This is an anonymous process, and is completely optional. After choosing your favorite option, click Finish, and that'll take you to the welcome screen.

This screen has a few links to various documentation resources. And also a button that you could click at this point to start your first Adroid app. I won't do that right now. I'll be showing you how to create your first app in a few movies. So I'll close the welcome screen and that takes me to the eclipse layout. So if you've gotten this far, and you're successfully runningEclipse with the ADT you're ready for the next step. Getting to know the Eclipse environment and setting up the SDK.

Downloading all the tools you'll need to build your android apps. iI explained below how to Download and install the each and every tool for running and developing your applications.

 JDK Installation



Make sure that JDK is installed on the system and path fro JDK is set .

You can download the JDK 6 or above from  the Following link :
http://www.oracle.com/technetwork/java/javase/downloads/index.html

ADT installation


Download and Install the ADT(Android Developer Tool) from the following link given below :
http://developer.android.com/tools/sdk/eclipse-adt.html

4.Eclipse IDE 


Download the eclipse IDE for Java from the given link as per your system support i.e. 32 bit or 64 bit os
https://eclipse.org/downloads/

Setting up of Development Environment


 Now your system is ready for the android application development. you need to follow the given steps for creating the development environment.

Set the path of JDK for windows

1. In Windows

Windows XP

  1. Select Start, select Control Panel. double click System, and select the Advanced tab.
  2. Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
  3. In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable. Click OK. Close all remaining windows by clicking OK.
Windows Vista:
  1. From the desktop, right click the My Computer icon.
  2. Choose Properties from the context menu.
  3. Click the Advanced tab (Advanced system settings link in Vista).
  4. Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
  5. In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable. Click OK. Close all remaining windows by clicking OK.
Windows 7:
  1. From the desktop, right click the Computer icon.
  2. Choose Properties from the context menu.
  3. Click the Advanced system settings link.
  4. Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
  5. In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable. Click OK. Close all remaining windows by clicking OK.

Once you set the path of JDK you need to follow the following steps :


1. Start Eclipse 
2.Go to Help----->select Install new software----------> got to right hand side click on Add button
In Add button Dialog enter following
Name = ADT Plugin
Location = rar file or web Location of ADT plugin i.e. https://dl-ssl.google.com/android/eclipse/ 
3. Restart your Eclipse
4. Now your eclipse is ready for developing the android application.

Creating your first app

Once you've created a virtual device, or attached a device for debugging, you're ready to create your first project. From within eclipse, select File > New > Android Application Project.The application name can be any string. Keep it short, because it's going to appear as a label on the device itself, to identify your app. If you make this string too long, it'll be truncated automatically. The project name can be the same as the application name, but it can't include any spaces or special characters.

The project name is only used by Eclipse, and it won't affect the app itself. The package name is very important. It's a globally unique identifier for your app. And to make it globally unique, most developers use their website address, their domain name, in reverse domain notation. So for example, for my personal applications, I might use a package name that starts com.example. If you are Owing a domain then its easy for you to the name of your package by your domain name because nobody else in the world is going to use that package name, because you own that domain.

For this course, we'll use a generic package name of com.example.  That's only used globally for training examples. These apps won't be submitted to the Google Play store or other application distribution channels. They're only for training, so this is a good package name to use. But for your apps, use your domain. Next we'll set the SDKs.

The minimum required SDK represents the earliest version of Android that you're going to support with your app. It defaults to Android 2.2. But that version of the operating system has a very small market share these days. So, the earliest version that I recommend supporting is Android 2.3, or Gingerbread.
As of the time of this recording, Gingerbread still had about 26%of the global device market. If you want to make your life a little easier though Change the minimum required SDK to API 14, Android 4.0 or Ice Cream Sandwich.

By only supporting 4.0 and up, you eliminate a lot of extra coding and testing that you'd otherwise need to do. And you'll see have a majority of the market available to you. The target SDK, represents your primary operating system target. As of the time of this recording in late 2013, Android 4.4 or Kit Kat had just been released. Android 4.3 or the last version of Jelly Bean was really the most common new version of the operating system on real devices.

It's up to you which target SDK to support. But typically, I set this to the latest version of Android, so I'll set it to KitKat. I'll accept the default theme, but you can also experiment with the other built in themes of Holo Dark and Holo Light, and I'll click Next. On this screen, I'll leave all the options at their defaults including Create custom launcher icon. And then when I click Next, I'll be taken to a screen where I Configure the Launcher Icon.

The launcher icon is a graphic that visually identifies the app to the user on the device. The default is a picture of Andy the android, but you'll want to customize to some extent and this screen makes it easy to do that. You can either choose Clipart by selecting Clipart and then clicking Choose, or you can create a text based icon, I'll use Clipart. I'll select that and click Choose. And then, I'll select one of these graphics.

You can choose anything you like. This is going to be a simple hello application. So, I'll select just a picture of a head. And I get this graphic, as my Launcher icon. Now you can customize it. You can indicate how much Additional Padding you want, that resizes the graphic. I'll leave it at the default of 0%. And you can indicate whether you want to wrap the graphic in a Square or a Circle. I'll select a Circle. And you can change the colors.

I'll click on the Foreground Color button. And then, I'll chose a color. If you have trouble getting to the color selection dialogue try double-clicking on these buttons. And you can also affect the Background Color, if you prefer. I'll once again set the padding, now that I have a shape around the icon and I'll click Next. On this screen, you indicate what your initial application looks like.The applications appearance is controlled by something called an Activity. And for first app, we'll use the default of a Blank Activity.

You could also select Fullscreen Activity, or Master Detail Flow. But those will create a lot more code than we want to look at right now. So I'll select Blank Activity and click Next. And I'll accept the defaults on this screen and click Finish. And that creates my application. Now to start the application and see how it will look on a device. Make sure that you've opened a Java file. One will open automatically for you, called MainActivity.java.

Then go to the Menu, and select Run, and select Run again. The first time you run any project, you'll be asked what kind of launch configuration you want to use. Choose this one. Run as Android application, and click OK. Depending on your system configuration, your app might automatically launch, and that could happen if you only have one virtual device, or one actual device attached to your computer. But if you have more than one option, you might be prompted to choose a device.

I'm going to choose my AVD_for_Nexus_4, my virtual device. If you don't see it listed here, you might need to launch it from here. So, I'll click that and click OK. Then I'll use Alt+Tab and switch over to my device. If I come to the lock screen, I'll unlock it. And, after just a moment, I should see the application running. I'll go back a step, and I'll go to my application list, andhere's my Hello Android application listed, I'll click it and run it again.

Now, I'll come back to the class MainActivity. And I'll run again. This time, I'll go to the toolbar.This is the Run button. If I wanted to just run, I would click the button. But instead, I'm going edit my run configuration. I'll click the down arrow, and choose Run Configurations. Then, I'll click Target. And I can indicate here, how I want to launch? I can either select a preferred virtual device or I can say always prompt me to pick a device.

I'll do that and click the Run button. And this time, I'll choose my Nexus 5, which is attached to my computer, and click OK. And there's the same application running on the actual device. So now, I've created my first app, and I've run it both on a virtual device and on a real device. And if you've gotten this far, you're in great shape. You're ready to start learning the details of howto build Android apps that run on Android devices from phones to tablets and more.

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