docs/html/guide/developing/tools/index.jd

page.title=Tools
@jd:body

<img src="{@docRoot}assets/images/android_wrench.png" alt="" align="right">

<p>The Android SDK includes a variety of tools that help you develop mobile
applications for the Android platform. The tools are classified into two groups: SDK tools
and platform tools. SDK tools are platform independent and are required no matter which
Android platform you are developing on. Platform tools are customized to support the features of the
latest Android platform.</p>

<h2 id="tools-sdk">SDK Tools</h2>
<p>The SDK tools are installed with the SDK starter package and are periodically updated.
The SDK tools are required if you are developing Android applications. The most important SDK tools
include the Android SDK and AVD Manager (<code>android</code>), the emulator
(<code>emulator</code>), and the Dalvik Debug Monitor Server
(<code>ddms</code>). A short summary of some frequently-used SDK tools is provided below.</p>

<dl>
  <dt><a href="android.html">android</a></dt>
    <dd>Lets you manage AVDs, projects, and the installed components of the SDK.</dd>
  <dt><a href="{@docRoot}guide/developing/debugging/ddms.html">Dalvik Debug Monitor
Server (ddms)</a></dt>
    <dd>Lets you debug Android applications.</dd>
  <dt><a href="dmtracedump.html">dmtracedump</a></dt>
    <dd>Generates graphical call-stack diagrams from trace log files. The tool uses the
Graphviz Dot utility to create the graphical output, so you need to install Graphviz before
running <code>dmtracedump</code>. For more information on using <code>dmtracedump</code>, see <a
href="{@docRoot}guide/developing/debugging/debugging-tracing.html#dmtracedump">Profiling
with Traceview and dmtracedump</a></dd>
  <dt><a href="draw9patch.html">Draw 9-patch</a></dt>
    <dd>Allows you to easily create a {@link android.graphics.NinePatch} graphic using a
WYSIWYG editor. It also previews stretched versions of the image, and highlights the area in which
content is allowed.</dd>
  <dt><a href="emulator.html">Android Emulator (emulator)</a></dt>
    <dd>A QEMU-based device-emulation tool that you can use to design, debug, and test
your applications in an actual Android run-time environment.</dd>
  <dt><a href="hierarchy-viewer.html">Hierarchy Viewer (hierarchyviewer)</a></dt>
    <dd>Lets you debug and optimize an Android application's user interface.</dd>
  <dt><a href="hprof-conv.html">hprof-conv</a></dt>
    <dd>Converts the HPROF file that is generated by the Android SDK tools to a standard format so
you can view the file in a profiling tool of your choice.</dd>
  <dt><a href="layoutopt.html">layoutopt</a></dt>
    <dd>Lets you quickly analyze your application's layouts in order to optimize them for
efficiency.</dd>
  <dt><a href="mksdcard.html">mksdcard</a></dt>
    <dd>Helps you create a disk image that you can use with the emulator, to simulate the presence
of an external storage card (such as an SD card).</dd>
  <dt><a href="monkey.html">Monkey</a></dt>
    <dd>Runs on your emulator or device and generates pseudo-random streams of user events such
as clicks, touches, or gestures, as well as a number of  system-level events. You can use the Monkey
to stress-test applications that you are developing, in a random yet repeatable manner.</dd>
  <dt><a href="monkeyrunner_concepts.html">monkeyrunner</a></dt>
    <dd>Provides an API for writing programs that control an Android device or emulator from
outside of Android code.</dd>
  <dt><a href="proguard.html">ProGuard</a></dt>
    <dd>Shrinks, optimizes, and obfuscates your code by removing unused code and renaming
classes, fields, and methods with semantically obscure names.</dd>
  <dt><a href="sqlite3.html">sqlite3</a></dt>
    <dd>Lets you access the SQLite data files created and used by Android applications.</dd>
  <dt><a href="traceview.html">traceview</a></dt>
    <dd>Provides a graphical viewer for execution logs saved by your application.</dd>
  <dt><a href="zipalign.html">zipalign</a></dt>
    <dd>Optimizes <code>.apk</code> files by ensuring that all uncompressed data starts with a
particular alignment relative to the start of the file. This should always be used to align .apk
files after they have been signed.</dd>
 </dl>

<h2 id="tools-platform">Platform Tools</h2>

<p>The platform tools are typically updated every time you install a new SDK platform. Each update
of the platform tools is backward compatible with older platforms. Usually, you directly use only
one of the platform tools&mdash;the <a href="adb.html">Android Debug Bridge (<code>adb</code>)</a>.
Android Debug Bridge is a versatile tool that lets you manage the state of an emulator instance or
Android-powered device. You can also use it to install an Android application (.apk) file on a
device.</p>

<p>The other platform tools, such as <a href="{@docRoot}guide/developing/tools/aidl.html">aidl</a>,
<code>aapt</code>, <code>dexdump</code>, and <code>dx</code>, are typically called by the Android
build tools or Android Development Tools (ADT), so you rarely need to invoke these tools directly.
As a general rule, you should rely on the build tools or the ADT plugin to call them as needed.</p>

<p class="note"><strong>Note:</strong> The Android SDK provides additional shell tools that can
be accessed through <code>adb</code>, such as <a href="bmgr.html">bmgr</a> and
<a href="logcat.html">logcat</a>.</p>