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+page.title=UI/Application Exerciser Monkey
+@jd:body
+
+<p>The Monkey is a program that runs on your
+<a href="{@docRoot}reference/emulator.html">emulator</a> 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.</p>
+
+<a name="overview"></a>
+<h2>Overview</h2>
+
+<p>The Monkey is a command-line tool that that you can run on any emulator
+instance or on a device. It sends a pseudo-random stream of
+user events into the system, which acts as a stress test on the application software you are
+developing.</p>
+
+<p>The Monkey includes a number of options, but they break down into four primary
+categories:</p>
+
+<ul>
+ <li>Basic configuration options, such as setting the number of events to attempt.</li>
+ <li>Operational constraints, such as restricting the test to a single package.</li>
+ <li>Event types and frequencies.</li>
+ <li>Debugging options.</li>
+</ul>
+
+<p>When the Monkey runs, it generates events and sends them to the system. It also <i>watches</i>
+the system under test and looks for three conditions, which it treats specially:</p>
+
+<ul>
+ <li>If you have constrained the Monkey to run in one or more specific packages, it
+ watches for attempts to navigate to any other packages, and blocks them.</li>
+ <li>If your application crashes or receives any sort of unhandled exception, the Monkey
+ will stop and report the error.</li>
+ <li>If your application generates an <i>application not responding</i> error, the Monkey
+ will stop and report the error.</li>
+</ul>
+
+<p>Depending on the verbosity level you have selected, you will also see reports on the progress
+of the Monkey and the events being generated.</p>
+
+<a name="basics"></a>
+<h2>Basic Use of the Monkey</h2>
+
+<p>You can launch the Monkey using a command line on your development machine or from a script.
+Because the Monkey runs in the emulator/device environment, you must launch it from a shell in
+that environment. You can do this by prefacing <code>adb shell</code> to each command,
+or by entering the shell and entering Monkey commands directly.</p>
+<p>The basic syntax is: </p>
+
+<pre>$ adb shell monkey [options] &lt;event-count&gt;</pre>
+
+<p>With no options specified, the Monkey will launch in a quiet (non-verbose) mode, and will send
+events to any (and all) packages installed on your target. Here is a more typical command line,
+which will launch your application and send 500 pseudo-random events to it:</p>
+
+<pre>$ adb shell monkey -p your.package.name -v 500</pre>
+
+<a name="reference"></a>
+<h2>Command Options Reference</h2>
+
+<p>The table below lists all options you can include on the Monkey command line.</p>
+
+<table>
+<tr>
+ <th>Category</th>
+ <th>Option</th>
+ <th>Description</th>
+</tr>
+
+<tr>
+<td rowspan="2">General</td>
+<td><code>--help</code></td>
+<td>Prints a simple usage guide.</td>
+</tr>
+
+<tr>
+<td><code>-v</code></td>
+<td>Each -v on the command line will increment the verbosity level.
+Level 0 (the default) provides little information beyond startup notification, test completion, and
+final results.
+Level 1 provides more details about the test as it runs, such as individual events being sent to
+your activities.
+Level 2 provides more detailed setup information such as activities selected or not selected for
+testing.</td>
+</tr>
+
+<tr>
+<td rowspan="10">Events</td>
+<td><code>-s &lt;seed&gt;</code></td>
+<td>Seed value for pseudo-random number generator. If you re-run the Monkey with the same seed
+value, it will generate the same sequence of events.</td>
+</tr>
+
+<tr>
+<td><code>--throttle &lt;milliseconds&gt;</code></td>
+<td>Inserts a fixed delay between events. You can use this option to slow down the Monkey.
+If not specified, there is no delay and the events are generated as rapidly as possible.</td>
+</tr>
+
+<tr>
+<td><code>--pct-touch &lt;percent&gt;</code></td>
+<td>Adjust percentage of touch events.
+(Touch events are a down-up event in a single place on the screen.)</td>
+</tr>
+
+<tr>
+<td><code>--pct-motion &lt;percent&gt;</code></td>
+<td>Adjust percentage of motion events.
+(Motion events consist of a down event somewhere on the screen, a series of pseudo-random
+movements, and an up event.)</td>
+</tr>
+
+<tr>
+<td><code>--pct-trackball &lt;percent&gt;</code></td>
+<td>Adjust percentage of trackball events.
+(Trackball events consist of one or more random movements, sometimes followed by a click.)</td>
+</tr>
+
+<tr>
+<td><code>--pct-nav &lt;percent&gt;</code></td>
+<td>Adjust percentage of "basic" navigation events.
+(Navigation events consist of up/down/left/right, as input from a directional input device.)</td>
+</tr>
+
+<tr>
+<td><code>--pct-majornav &lt;percent&gt;</code></td>
+<td>Adjust percentage of "major" navigation events.
+(These are navigation events that will typically cause actions within your UI, such as
+the center button in a 5-way pad, the back key, or the menu key.)</td>
+</tr>
+
+<tr>
+<td><code>--pct-syskeys &lt;percent&gt;</code></td>
+<td>Adjust percentage of "system" key events.
+(These are keys that are generally reserved for use by the system, such as Home, Back, Start Call,
+End Call, or Volume controls.)</td>
+</tr>
+
+<tr>
+<td><code>--pct-appswitch &lt;percent&gt;</code></td>
+<td>Adjust percentage of activity launches. At random intervals, the Monkey will issue a startActivity() call, as a way of maximizing
+coverage of all activities within your package.</td>
+</tr>
+
+<tr>
+<td><code>--pct-anyevent &lt;percent&gt;</code></td>
+<td>Adjust percentage of other types of events. This is a catch-all for all other types of events such as keypresses, other less-used
+buttons on the device, and so forth.</td>
+</tr>
+
+<tr>
+<td rowspan="2">Constraints</td>
+<td><code>-p &lt;allowed-package-name&gt;</code></td>
+<td>If you specify one or more packages this way, the Monkey will <i>only</i> allow the system
+to visit activities within those packages. If your application requires access to activities in
+other packages (e.g. to select a contact) you'll need to specify those packages as well.
+If you don't specify any packages, the Monkey will allow the system to launch activities
+in all packages. To specify multiple packages, use the -p option multiple times &mdash; one -p
+option per package.</td>
+</tr>
+
+<tr>
+<td><code>-c &lt;main-category&gt;</code></td>
+<td>If you specify one or more categories this way, the Monkey will <i>only</i> allow the
+system to visit activities that are listed with one of the specified categories.
+If you don't specify any categories, the Monkey will select activities listed with the category
+Intent.CATEGORY_LAUNCHER or Intent.CATEGORY_MONKEY. To specify multiple categories, use the -c
+option multiple times &mdash; one -c option per category.</td>
+</tr>
+
+<tr>
+<td rowspan="8">Debugging</td>
+<td><code>--dbg-no-events</code></td>
+<td>When specified, the Monkey will perform the initial launch into a test activity, but
+will not generate any further events.
+For best results, combine with -v, one or more package constraints, and a non-zero throttle to keep the Monkey
+running for 30 seconds or more. This provides an environment in which you can monitor package
+transitions invoked by your application.</td>
+</tr>
+
+<tr>
+<td><code>--hprof</code></td>
+<td>If set, this option will generate profiling reports immediately before and after
+the Monkey event sequence.
+This will generate large (~5Mb) files in data/misc, so use with care. See
+<a href="{@docRoot}reference/traceview.html" title="traceview">Traceview</a> for more information
+on trace files.</td>
+</tr>
+
+<tr>
+<td><code>--ignore-crashes</code></td>
+<td>Normally, the Monkey will stop when the application crashes or experiences any type of
+unhandled exception. If you specify this option, the Monkey will continue to send events to
+the system, until the count is completed.</td>
+</tr>
+
+<tr>
+<td><code>--ignore-timeouts</code></td>
+<td>Normally, the Monkey will stop when the application experiences any type of timeout error such
+as a "Application Not Responding" dialog. If you specify this option, the Monkey will continue to
+send events to the system, until the count is completed.</td>
+</tr>
+
+<tr>
+<td><code>--ignore-security-exceptions</code></td>
+<td>Normally, the Monkey will stop when the application experiences any type of permissions error,
+for example if it attempts to launch an activity that requires certain permissions. If you specify
+this option, the Monkey will continue to send events to the system, until the count is
+completed.</td>
+</tr>
+
+<tr>
+<td><code>--kill-process-after-error</code></td>
+<td>Normally, when the Monkey stops due to an error, the application that failed will be left
+running. When this option is set, it will signal the system to stop the process in which the error
+occurred.
+Note, under a normal (successful) completion, the launched process(es) are not stopped, and
+the device is simply left in the last state after the final event.</td>
+</tr>
+
+<tr>
+<td><code>--monitor-native-crashes</code></td>
+<td>Watches for and reports crashes occurring in the Android system native code. If --kill-process-after-error is set, the system will stop.</td>
+</tr>
+
+<tr>
+<td><code>--wait-dbg</code></td>
+<td>Stops the Monkey from executing until a debugger is attached to it.</td>
+</tr>
+
+</table>
+
+<!-- TODO: add a section called "debugging" that covers ways to use it,
+need to clear data, use of the seed, etc. -->
+
+<!-- TODO: add a section that lays down a contract for Monkey output so it can be
+scripted safely. -->
+