android_frameworks_base/docs/html/sdk/2.0_r1/installing.jd

page.title=Installing the Android 2.0 SDK
sdk.preview=0

@jd:body

<div id="qv-wrapper">
<div id="qv">

  <h2>In this document</h2>
  <ol>
    <li><a href="#Preparing">Prepare for Installation</a></li>
    <li><a href="#Installing">Install the SDK</a></li>
    <li><a href="#InstallingADT">Install the ADT Plugin for Eclipse</a></li>
    <li><a href="#sdkContents">SDK Contents</a></li>
    <li><a href="#NextSteps">Next Steps</a></li>
    <li><a href="#InstallationNotes">Installation Notes</a></li>
    <li><a href="#Troubleshooting">Troubleshooting ADT Installation</a></li>
  </ol>

</div>
</div>

<p>This page describes how to install the Android SDK and set up your
development environment for the first time.</p>

<p>If you encounter any problems during installation, see the 
<a href="#InstallationNotes">Installation Notes</a> at the bottom of
this page.</p>

<h4>Updating?</h4>
<p>If you have already installed an earlier version
of the Android SDK, please instead read <a href="{@docRoot}sdk/updating-sdk.html">Updating Your SDK</a>.
</p>


<h2 id="Preparing">Prepare for Installation</h2>

<p>Before you begin, take a moment to confirm that your development machine
meets the <a href="requirements.html">System Requirements</a>.</p>

<p>If you will be developing in Eclipse with the Android Development
Tools (ADT) Plugin &mdash; the recommended path if you are new to
Android &mdash; make sure that you have a suitable version of Eclipse
installed on your computer (3.4 or newer is recommended). If you need 
to install Eclipse, you can download it from this location: </p>

<p style="margin-left:2em;"><a href=
"http://www.eclipse.org/downloads/">http://www.eclipse.org/downloads/</a></p>

<p>A Java or RCP version of Eclipse is recommended. </p>

<h2 id="Installing">Install the SDK</h2>

<p>After downloading the Android SDK, unpack the Android SDK .zip archive 
to a suitable location on your machine. By default, the SDK files are unpacked 
into a directory named <code>android_sdk_<em>&lt;platform</em>&gt;_<em>&lt;release&gt;</em></code>. </p>

<p>Make a note of the name and location of the unpacked SDK directory on your system &mdash; you 
will need to refer to the SDK directory later, when setting up the Android plugin or when 
using the SDK tools.</p>

<p>Optionally, you may want to add the location of the SDK's primary <code>tools</code> directory 
to your system <code>PATH</code>. The primary <code>tools/</code> directory is located at the root of the 
SDK folder. Adding <code>tools</code> to your path lets you run Android Debug Bridge (adb) and 
the other command line <a href="{@docRoot}guide/developing/tools/index.html">tools</a> without 
needing to supply the full path to the tools directory. </p>
<ul>
    <li>On Linux, edit your <code>~/.bash_profile</code> or <code>~/.bashrc</code> file. Look
    for a line that sets the PATH environment variable and add the
    full path to the <code>tools/</code> directory to it. If you don't 
    see a line setting the path, you can add one:</li>

    <ul><code>export PATH=${PATH}:<em>&lt;your_sdk_dir&gt;</em>/tools</code></ul>

    <li>On a Mac OS X, look in your home directory for <code>.bash_profile</code> and
    proceed as for Linux. You can create the <code>.bash_profile</code> if 
    you haven't already set one up on your machine. </li>

    <li>On Windows, right-click on My Computer, and select Properties.  
  Under the Advanced tab, hit the Environment Variables button, and in the
  dialog that comes up, double-click on Path (under System Variables). Add the full path to the 
  <code>tools/</code> directory to the path. </li>
  </ul>

<p>Note that, if you update your SDK in the future, you 
should remember to update your <code>PATH</code> settings to point to the new location, if different.</p>

<p>If you will be using the Eclipse IDE as your development environment,
the next section describes how to install the Android Development Tools (ADT) plugin and set up Eclipse. 
If you choose not to use Eclipse, you can 
develop Android applications in an IDE of your choice and then compile, debug and deploy using
the tools included in the SDK (skip to <a href="#NextSteps">Next Steps</a>).</p>


<h2 id="InstallingADT">Install the ADT Plugin for Eclipse</h2>

<p>Android offers a custom plugin for the Eclipse IDE, called Android
Development Tools (ADT), that is designed to give you a powerful,
integrated environment in which to build Android applications. It
extends the capabilites of Eclipse to let you quickly set up new Android
projects, create an application UI, add components based on the Android
Framework API, debug your applications using the Android SDK tools, and even export
signed (or unsigned) APKs in order to distribute your application.</p>

<p>In general, using Eclipse with ADT is a highly recommended approach to
Android development and is the fastest way to get started. (If you prefer to
work in an IDE other than Eclipse, you do not need to install Eclipse or ADT,
instead, you can directly use the SDK tools to build and debug your
application&mdash;skip to <a href="#NextSteps">Next Steps</a>.)</p>

<p>Once you have the Eclipse IDE installed, as described in <a
href="#Preparing">Preparing for Installation</a>, follow the steps below to
download the ADT plugin and install it in your respective Eclipse environment.
</p>

<table style="font-size:100%">
<tr><th>Eclipse 3.4 (Ganymede)</th><th>Eclipse 3.5 (Galileo)</th></tr>
<tr>
<td width="45%">
<!-- 3.4 steps -->
<ol>
    <li>Start Eclipse, then select <strong>Help</strong> &gt; <strong>Software Updates...</strong>. 
        In the dialog that appears, click the <strong>Available Software</strong> tab. </li>
    <li>Click <strong>Add Site...</strong> </li>
    <li>In the Add Site dialog that appears, enter this URL in the "Location" field:
      <pre style="margin-left:0">https://dl-ssl.google.com/android/eclipse/</pre>
        <p>Note: If you have trouble aqcuiring the plugin, try using "http" in the Location URL,
        instead of "https" (https is preferred for security reasons).</p>   
      <p>Click <strong>OK</strong>.</p></li>
    <li>Back in the Available Software view, you should see the plugin listed by the URL,
    with "Developer Tools" nested within it. Select the checkbox next to 
      Developer Tools and click <strong>Install...</strong></li>
    <li>On the subsequent Install window, "Android DDMS" and "Android Development Tools"
    should both be checked. Click <strong>Next</strong>. </li>
    <li>Read and accept the license agreement, then click <strong>Finish</strong>.</li>
    <li>Restart Eclipse. </li>
</ol>

</td>
<td>
<!-- 3.5 steps -->
<ol>
    <li>Start Eclipse, then select <strong>Help</strong> &gt; <strong>Install
        New Softare</strong>. </li>
    <li>In the Available Software dialog, click <strong>Add...</strong>.</li>
    <li>In the Add Site dialog that appears, enter a name for the remote site
        (e.g., "Android Plugin") in the "Name" field. 
        <p>In the "Location" field, enter this URL:</p>
        <pre>https://dl-ssl.google.com/android/eclipse/</pre>
        <p>Note: If you have trouble aqcuiring the plugin, you can try
           using "http" in the URL, instead of "https" (https is preferred for 
           security reasons).</p>
        <p>Click <strong>OK</strong>.</p>
    </li>
    <li>Back in the Available Software view, you should now see "Developer
        Tools" added to the list. Select the checkbox next to Developer Tools, 
        which will automatically select the nested tools Android DDMS and Android 
        Development Tools. 
        Click <strong>Next</strong>. </li>
    <li>In the resulting Install Details dialog, the Android DDMS and Android 
        Development Tools features are listed. Click <strong>Next</strong> to 
        read and accept the license agreement and install any dependencies, 
        then click <strong>Finish</strong>. </li>
    <li>Restart Eclipse. </li>
	
</ol>
</td>
</tr>
</table>

<p>Now modify your Eclipse preferences to point to the Android SDK directory:</p>
<ol>
    <li>Select <strong>Window</strong> &gt; <strong>Preferences...</strong> to open the Preferences
        panel (Mac OS X: <strong>Eclipse</strong> &gt; <strong>Preferences</strong>).</li>
    <li>Select <strong>Android</strong> from the left panel. </li>
    <li>For the <em>SDK Location</em> in the main panel, click <strong>Browse...</strong> and 
        locate your downloaded SDK directory. </li>
    <li>Click <strong>Apply</strong>, then <strong>OK</strong>.</li>
</ol>

<p>Done! If you haven't encountered any problems, then you're ready to
begin developing Android applications. See the 
<a href="#NextSteps">Next Steps</a> section for suggestions on how to start. </p>


<h2 id="sdkContents">Contents of the SDK</h2>

<p>Once you've downloaded and unpacked the SDK, open the SDK directory 
and take a look at what's inside.</p>

<p>The table below describes the SDK directory contents. </p>

<table>
<tr>
<th colspan="3">Name</th><th>Description</th>
</tr>
<tr>
<td colspan="3"><code>add-ons/</code></td>
<td>Contains add-ons to the Android SDK development
environment, which let you develop against external libraries that are available on some
devices. </td>
</tr>
<tr>
<td colspan="3"><code>docs/</code></td>
<td>A full set of documentation in HTML format, including the Developer's Guide,
API Reference, and other information.</td>
</tr>
<tr>
<td colspan="3"><code>platforms/</code></td>
<td>Contains a set of Android platform versions that you can develop
applications against, each in a separate directory.  </td>
</tr>
<tr>
<td style="width:2em;border-bottom-color:white;"></td>
<td colspan="2"><code>&lt;platform&gt;/</code></td>
<td>Platform version directory, for example "Android 1.6". All platform version 
directories contain a similar set of files and subdirectory structure.</td>
</tr>

<tr>
<td style="width:2em;border-bottom-color:white;">&nbsp;</td>
<td style="width:2em;border-bottom-color:white;"></td>
<td><code>data/</code></td>
<td>Storage area for default fonts and resource definitions.</td>
</tr>
<tr>
<td style="width:2em;border-bottom-color:white;"></td>
<td style="width:2em;border-bottom-color:white;"></td>
<td><code>images/</code></td>
<td>Storage area for default disk images, including the Android system image, 
the default userdata image, the default ramdisk image, and more. The images 
are used in emulator sessions.</td>
</tr>
<tr>
<td style="width:2em;border-bottom-color:white;"></td>
<td style="width:2em;border-bottom-color:white;"></td>
<td><code>samples/</code></td>
<td>Contains a wide variety of sample applications that you can load as projects
into your development environment, compile, and run on the emulator.</td>
</tr>
<tr>
<td style="width:2em;border-bottom-color:white;"></td>
<td style="width:2em;border-bottom-color:white;"></td>
<td><code>skins/</code></td>
<td>A set of emulator skins available for the platform version. Each skin is
designed for a specific screen resolution.</td>
</tr>
<tr>
<td style="width:2em;border-bottom-color:white;"></td>
<td style="width:2em;border-bottom-color:white;"></td>
<td><code>templates/</code></td>
<td>Storage area for file templates used by the SDK development tools.</td>
</tr>
<tr>
<td style="width:2em;border-bottom-color:white;"></td>
<td style="width:2em;border-bottom-color:white;"></td>
<td><code>tools/</code></td>
<td>Any development tools that are specific to the platform version.</td>
</tr>
<tr>
<td style="width:2em;"></td>
<td style="width:2em;"></td>
<td><code>android.jar</code></td>
<td>The Android library used when compiling applications against this platform
version.</td>
</tr>
<tr>
<td colspan="3"><code>tools/</code></td>
<td>Contains the set of development and profiling tools available to you, such
as the emulator, the <code>android</code> tool, adb, ddms, and more.</td>
</tr>
<tr>
<td colspan="3"><code>RELEASE_NOTES.html</code></td>
<td>A file that loads the local version of the SDK release notes, if
available.</td>
</tr>
<tr>
<td colspan="3"><code>documentation.html</code></td>
<td>A file that loads the entry page for the local Android SDK
documentation.</td>
</tr>

</table>

<h2 id="InstallationNotes">Installation Notes</h2>

<h3>Ubuntu Linux Notes</h3>

<ul>
  <li>If you need help installing and configuring Java on your
    development machine, you might find these resources helpful: 
    <ul>
      <li><a href="https://help.ubuntu.com/community/Java">https://help.ubuntu.com/community/Java </a></li>
      <li><a href="https://help.ubuntu.com/community/Java">https://help.ubuntu.com/community/JavaInstallation</a></li>
    </ul>
  </li>
  <li>Here are the steps to install Java and Eclipse, prior to installing
  the Android SDK and ADT Plugin.
    <ol>
      <li>If you are running a 64-bit distribution on your development
      machine, you need to install the <code>ia32-libs</code> package using
      <code>apt-get:</code>:
      <pre>apt-get install ia32-libs</pre>
      </li>
      <li>Next, install Java: <pre>apt-get install sun-java6-bin</pre></li>
      <li>The Ubuntu package manager does not currently offer an Eclipse 3.3
      version for download, so we recommend that you download Eclipse from
      eclipse.org (<a
      href="http://www.eclipse.org/downloads/">http://www.eclipse.org/
      downloads/</a>). A Java or RCP version of Eclipse is recommended.</li>
      <li>Follow the steps given in previous sections to install the SDK 
      and the ADT plugin. </li>
    </ol>
  </li>
</ul>

<h3>Other Linux Notes</h3>

<ul>
  <li>If JDK is already installed on your development computer, please
  take a moment to make sure that it meets the version requirements listed
  in the <a href="requirements.html">System Requirements</a>.
  In particular, note that some Linux distributions may include JDK 1.4 or Gnu
  Compiler for Java, both of which are not supported for Android development.</li>
</ul>


<h2 id="Troubleshooting">Troubleshooting ADT Installation</h2>

<p> If you are having trouble downloading the ADT plugin after following the
steps above, here are some suggestions: </p>

<ul>
  <li>If Eclipse can not find the remote update site containing the ADT plugin,
try changing the remote site URL to use http, rather than https. That is, set
the Location for the remote site to:
<pre>http://dl-ssl.google.com/android/eclipse/</pre></li> 
<li>If you are behind a firewall (such as a corporate firewall), make sure that
you have properly configured your proxy settings in Eclipse. In Eclipse 3.3/3.4,
you can configure proxy information from the main Eclipse menu in
<strong>Window</strong> (on Mac OS X, <strong>Eclipse</strong>) &gt;
<strong>Preferences</strong> &gt; <strong>General</strong> &gt; <strong>Network
Connections</strong>.</li>
</ul>

<p> If you are still unable to use Eclipse to download the ADT plugin as a
remote update site, you can download the ADT zip file to your local machine and
manually install it:</p>

<ol>
  <li><a href="http://developer.android.com/sdk/preview/index.html">Download the
      ADT Plugin zip file</a> (do not unpack it).</li>
  <li>Follow steps 1 and 2 in the <a href="#InstallingADT">default install 
      instructions</a> (above).</li>
  <li>In the Add Site dialog, click <strong>Archive</strong>.</li>
  <li>Browse and select the downloaded zip file.</li>
  <li>In Eclipse 3.5 only, enter a name for the local update site (e.g.,
      "Android Plugin") in the "Name" field.</li>
  <li>Click <strong>OK</strong>.
  <li>Follow the remaining procedures as listed for 
      <a href="#InstallingADT">default installation</a> above,
      starting from step 4.</li>
</ol>

<p>To update your plugin once you've installed using the zip file, you will have
to follow these steps again instead of the default update instructions.</p>

<h4>Other install errors</h4>

<p>Note that there are features of ADT that require some optional 
Eclipse components (for example, WST). If you encounter an error when 
installing ADT, your Eclipse installion might not include these components. 
For information about how to quickly add the necessary components to your 
Eclipse installation, see the troubleshooting topic 
<a href="{@docRoot}guide/appendix/faq/troubleshooting.html#installeclipsecomponents">ADT 
Installation Error: "requires plug-in org.eclipse.wst.sse.ui"</a>.</p>

<h4>For Linux users</h4>
<p>If you encounter this error when installing the ADT Plugin for Eclipse: 
<pre>
An error occurred during provisioning.
Cannot connect to keystore.
JKS</pre>
<p>
...then your development machine lacks a suitable Java VM. Installing Sun
Java 6 will resolve this issue and you can then reinstall the ADT
Plugin.</p>