cherrypick Change-Id: Icf0c7772901f742c36ba417e07cc5e299f72849a

folder in the SDK.</p>

<p>Finally, a great way to started with Android development in Eclipse is to

follow both the <a href="{@docRoot}guide/tutorials/hello-world.html">Hello,

follow both the <a href="{@docRoot}resources/tutorials/hello-world.html">Hello,

World</a> and <a

href="{@docRoot}guide/tutorials/notepad/index.html">Notepad</a> code

href="{@docRoot}resources/tutorials/notepad/index.html">Notepad</a> code

tutorials. In particular, the start of the Hello Android tutorial is an

excellent introduction to creating a new Android application in Eclipse.</p>

@jd:body

<p>

Welcome to the <i>Android Dev Guide</i>! The Dev Guide is 

a practical introduction to developing applications for Android.  

It explores the concepts behind Android, the framework for 

Welcome to the <i>Android Dev Guide</i>! The Dev Guide provides 

a practical introduction to developing applications for Android and documentation about major

platform features. It explores the concepts behind Android, the framework for 

constructing an application, and the tools for developing, 

testing, and publishing software for the platform.

</p>

The Dev Guide holds most of the documentation for the Android

platform, except for reference material on the framework API.  

For API specifications, go to the 

<a href="{@docRoot}reference/packages.html">Reference</a> tab above.

<a href="{@docRoot}reference/packages.html">Reference</a>.

</p>  

<p>

As you can see in the panel on the left, the Dev Guide is 

divided into a handful of sections.  They are:

divided into several sections:

<p>

<dl>

designing a user interface and setting up resources to storing 

data and using permissions &mdash; as needed.</dd>

<dt><b>Android Market Topics</b></dt>

<dd>Documentation for topics that concern publishing and monetizing applications on Android

Market, such as how to enforce licensing policies and implement in-app billing.</dd>

<dt><b>Developing</b></dt>

<dd>Directions for using Android's development and debugging tools, 

and for testing the results.</dd>

applications that perform efficiently and work well for the

user.</dd>

<dt><b>Tutorials and Samples</b></dt> 

<dd>Step-by-step tutorials and sample code demonstrating how 

an Android application is constructed.</dd>

<dt><b>Web Applications</b></dt> 

<dd>Documentation about how to create web applications that work seamlessly on Android-powered

devices and create Android applications that embed web-based content.</dd>

<dt><b>Appendix</b></dt>

<dd>Reference information and specifications, as well as FAQs, 

<p>

The first step in programming for Android is downloading the SDK

(software development kit).  For instructions and information about

the kit, go to the <a href="{@docRoot}sdk/index.html">SDK</a> tab above.

(software development kit).  For instructions and information, visit the <a

href="{@docRoot}sdk/index.html">SDK</a> tab.

</p>

<p>

After you have the SDK, begin by looking over the Dev Guide.

If you want to start by getting a quick look at the code, the short 

<a href="{@docRoot}guide/tutorials/hello-world.html">Hello World</a>

tutorial walks you through a standard "Hello, World" application as 

it would be written for the Android platform.  The 

After you have the SDK, begin by looking through the Dev Guide.

If you want to start by getting a quick look at some code, the 

<a href="{@docRoot}resources/tutorials/hello-world.html">Hello World</a>

tutorial walks you through a standard "Hello, World" application to introduce some basics of an

Android application. The 

<a href="{@docRoot}guide/topics/fundamentals.html">Application

Fundamentals</a> documentation is a good place to start for an 

understanding of the application framework.

Fundamentals</a> document is a good place to start learning the basics about the application

framework.

</p>

<p>

For additional help, consider joining one or more of the Android 

discussion groups.  Go to the 

<a href="{@docRoot}resources/community-groups.html">Community</a> pages 

<a href="{@docRoot}resources/community-groups.html">Developer Forums</a> page

for more information.

</p>

<ul>

  <li><a href="#billing-codes">Android Market Server Response Codes for In-app Billing</a></li>

  <li><a href="#billing-interface">In-app Billing Interface Parameters</a></li>

  <li><a href="billing-intents">In-app Billing Broadcast Intents</a></li>

  <li><a href="#billing-intents">In-app Billing Broadcast Intents</a></li>

</ul>

<h2 id="billing-codes">Android Market Server Response Codes for In-app Billing</h2>

Of course, we'll discuss some of the given code so that it all makes sense.</p>

<p>Note that a certain amount of knowledge is assumed for these tutorials. If you haven't

completed the <a href="{@docRoot}guide/tutorials/hello-world.html">Hello, World</a> tutorial, 

completed the <a href="{@docRoot}resources/tutorials/hello-world.html">Hello, World</a> tutorial, 

please do so—it will teach you many things you should know about basic 

Android development and Eclipse features. More specifically, you should know:</p>

<ul>