<ol>
<li><a href="#dev-project">Set Up an Auto Project</a></li>
<li><a href="#build-it">Build Auto Apps</a></li>
- <li><a href="#test-it-dhu">Run and Test Auto Apps </a></li>
</ol>
<h2>You should also read</h2>
-<h2 id="test-it-dhu">Run and Test Auto Apps </h2>
-
-<p>
- As you develop, you can run and test your app on your development machine
- using the <em>Desktop Head Unit</em> (DHU). The DHU replaces the existing
- simulators and enables your development machine to simulate a vehicle
- dashboard system running Android Auto.
-</p>
-
-<h3 id="installing-dhu">Installing the DHU</h3>
-
-<ol>
- <li>Enable developer mode on your mobile device, as described in
- <a href="{@docRoot}tools/device.html#developer-device-options">Enabling On-device
- Developer Options</a>. </li>
- <li>Compile your app in your development environment and install your app on
- a physical mobile device running Android 5.0 (API level 21) or higher. To check the
- version of Android on a Nexus device, go to
- <strong>Settings > About phone</strong> (or <strong>About tablet</strong>) <strong>>
- Android version</strong>.</li>
-
- <li>Install the
- <a class="external-link"
- href="https://play.google.com/store/apps/details?id=com.google.android.projection.gearhead&hl=en"
- >Android Auto app</a> on the mobile device.</li>
- <li>Open the <a href="{@docRoot}tools/help/sdk-manager.html">SDK Manager</a> and
- download the DHU package <strong>Android Auto Desktop Head Unit emulator</strong> from the
- <em>SDK Tools</em> tab. The DHU installs in the <code><sdk>/extras/google/auto/</code>
- directory.</li>
- <li>If you are running the DHU on Linux, you must also install
- the portaudio, libpng, sdl2, and sdl2_ttf libraries.
- The procedure to do this varies depending on your Linux distribution. For example, on
- Debian-derived Linux distributions, you can install the libraries with this command:
-
-<pre class="no-pretty-print">
-$ sudo apt-get install libsdl2-2.0-0 libsdl2-ttf-2.0-0 libportaudio2 libpng12-0
-</pre>
-
- </li>
-</ol>
-
-<div class="cols">
- <div class="col-6">
- <img src="{@docRoot}images/training/auto-desktop-head-unit-context-menu-enabled.png"
- alt="" >
- <p class="img-caption">
- <strong>Figure 1.</strong> Context menu with developer options.
- </p>
- </div>
-
- <div class="col-6">
- <img src="{@docRoot}images/training/auto-desktop-head-unit-server-running.png"
- alt="" >
- <p class="img-caption">
- <strong>Figure 2.</strong> Notification that the head unit server is running.
- </p>
- </div>
-</div> <!-- end cols-->
-
-
-<h3 id="connecting-dhu">Connecting the DHU to your mobile device</h3>
-
-<p>Run the DHU by connecting your mobile device to a development machine and setting up a connection to
- the head unit server over <a href="{@docRoot}tools/help/adb.html">Android Debug Bridge
- (ADB)</a>. Follow these steps to set up tunneling and start the DHU:</p>
-
-<ol>
- <li>On the mobile device, enable Android Auto developer mode by starting the Android Auto
- companion app, and then tapping the <i>Android Auto</i> toolbar title 10 times.
- This step is only required the first time you run the companion app.
- </li>
- <li>If the server is not already running, select <strong>Start head unit server</strong>
- from the Android Auto menu.
- <p>On the device, a foreground service appears in the notification area. </p>
- </li>
-
- <li>In the Android Auto app, make sure the <strong>Only connect to known cars</strong> option
- is disabled.</li>
-
- <li>Connect the mobile device to the development machine via USB.</li>
-
- <li>Make sure the mobile device has its screen unlocked, otherwise it cannot launch the DHU.</li>
-
- <li>On the development machine, run the following {@code adb} command to
- forward socket connections from the
- development machine's port 5277 to the same port number on the Android device.
- This configuration allows the DHU to connect to the head unit server running on your phone over
- a TCP socket.
- <pre class="no-pretty-print">$ adb forward tcp:5277 tcp:5277</pre>
- </li>
-
- <li>Start the DHU by running the command <code>desktop-head-unit.exe</code> (on Windows)
- or <code>./desktop-head-unit</code> (on Mac or Linux) from the
- <code><sdk>/extras/google/auto/</code> directory.
-
-<pre class="no-pretty-print">$ cd <sdk>/extras/google/auto
-$ ./desktop-head-unit</pre>
-
- <p>
- By default, the head unit server connects over port 5277. To override the host or port
- (for example, to forward over SSH), use the
- <code>desktop-head-unit --adb <[localhost:]port></code> flag, as in
- the following example:
- </p>
-
- <pre class="no-pretty-print">$ ./desktop-head-unit --adb 5999</pre>
-
- </li>
-</ol>
-
-<div class="figure" style="width:432px">
-
- <img src="{@docRoot}images/training/auto-desktop-head-unit-wkst-launch.png"
- alt="" >
- <p class="img-caption">
- <strong>Figure 4.</strong> DHU launches on the development machine.
- </p>
-</div>
-
- <img src="{@docRoot}images/training/auto-desktop-head-unit-launch.png"
- alt="" >
- <p class="img-caption">
- <strong>Figure 3.</strong> Android Auto launches on the mobile device.
- </p>
-
-<p>
- After you set up and start the DHU, you can run DHU commands from the command line to run and
- test your app from the terminal. You can also run these commands by using keyboard shortcuts. For
- more information about DHU configuration and commands, see <a href=
- "{@docRoot}tools/help/desktop-head-unit.html">Desktop Head Unit</a>.
-</p>
-
--- /dev/null
+page.title= Testing Apps for Auto
+page.tags="auto", "car", "automotive"
+page.article=true
+
+@jd:body
+
+<div id="tb-wrapper">
+<div id="tb">
+ <h2>Dependencies and Prerequisites</h2>
+ <ul>
+ <li>Android 5.0 (API level 21) or higher</li>
+ <li>Android Auto companion app installed</li>
+ </ul>
+ <h2>In this document</h2>
+ <ol>
+ <li><a href="#install">Installing the DHU</a></li>
+ <li><a href="#running-dhu">Running the DHU</a></li>
+ <li><a href="#dhu-commands">Issuing DHU Commands</a></li>
+ </ol>
+</div>
+</div>
+
+
+<p>
+ Testing your Auto app ensures that users do not encounter unexpected results or
+ have a poor experience when interacting with your apps. Android now provides
+ Desktop Head Unit (DHU), a testing tool for Auto apps that lets you test
+ pre-released versions of your Android Auto apps without having to work from
+ your car.</P>
+
+<p>The Desktop Head Unit (DHU) enables your development machine to emulate an
+Android Auto head unit, so you can easily run and test Android Auto apps.
+The DHU runs on Windows, Mac, and Linux hosts and replaces previous Android Auto
+ simulators, such as the Android Media Browser and Messaging simulators.</p>
+
+
+ <p class ="note"><strong>Note:</strong> It's important that you test your auto
+ app for the criteria listed on <a href={@docRoot}distribute/essentials/quality/auto.html>
+ Auto app quality </a> page prior to submitting to Google Play for review.
+ </p>
+ <p>
+ This lesson teaches you how to install and run the DHU on your development
+ machine for testing your apps. Once you’ve
+ installed the DHU, you can test your Android Auto apps by connecting your phone
+ and workstation via USB.
+
+ <h2 id ="install"> Installing the DHU</h2>
+ <p>Follow these steps to install the DHU on your development machine:</p>
+ <li>Enable developer mode on your mobile device, as described in
+ <a href="{@docRoot}tools/device.html#developer-device-options">Enabling On-device
+ Developer Options</a>. </li>
+ <li>Compile your app in your development environment and install your app on
+ a physical mobile device running Android 5.0 (API level 21) or higher. To check the
+ version of Android on a Nexus device, go to
+ <strong>Settings > About phone</strong> (or <strong>About tablet</strong>) <strong>>
+ Android version</strong>.</li>
+
+ <li>Install the
+ <a class="external-link"
+ href="https://play.google.com/store/apps/details?id=com.google.android.projection.gearhead&hl=en"
+ >Android Auto app</a> on the mobile device.</li>
+ <li>Open the <a href="{@docRoot}tools/help/sdk-manager.html">SDK Manager</a> and
+ download the DHU package <strong>Android Auto Desktop Head Unit emulator</strong> from the
+ <em>SDK Tools</em> tab. The DHU installs in the <code><sdk>/extras/google/auto/</code>
+ directory.</li>
+ <li>If you are running the DHU on Linux, you must also install
+ the portaudio, libpng, sdl2, and sdl2_ttf libraries.
+ The procedure to do this varies depending on your Linux distribution. For example, on
+ Debian-derived Linux distributions, you can install the libraries with this command:
+
+<pre class="no-pretty-print">
+$ sudo apt-get install libsdl2-2.0-0 libsdl2-ttf-2.0-0 libportaudio2 libpng12-0
+</pre>
+
+ </li>
+</ol>
+
+<div class="cols">
+ <div class="col-6">
+ <img src="{@docRoot}images/training/auto-desktop-head-unit-context-menu-enabled.png"
+ alt="" >
+ <p class="img-caption">
+ <strong>Figure 1.</strong> Context menu with developer options.
+ </p>
+ </div>
+
+ <div class="col-6">
+ <img src="{@docRoot}images/training/auto-desktop-head-unit-server-running.png"
+ alt="" >
+ <p class="img-caption">
+ <strong>Figure 2.</strong> Notification that the head unit server is running.
+ </p>
+ </div>
+</div> <!-- end cols-->
+
+
+<h2 id="running-dhu">Running the DHU</h2>
+
+<p>Run the DHU by connecting your mobile device to a development machine and
+setting up a connection to the head unit server over <a href="{@docRoot}tools/help/adb.html">Android Debug Bridge
+ (ADB)</a>. Follow these steps to set up tunneling and start the DHU:</p>
+
+<ol>
+ <li>On the mobile device, enable Android Auto developer mode by starting the Android Auto
+ companion app, and then tapping the <i>Android Auto</i> toolbar title 10 times.
+ This step is only required the first time you run the companion app.
+ </li>
+ <li>If the server is not already running, select <strong>Start head unit server</strong>
+ from the Android Auto menu.
+ <p>On the device, a foreground service appears in the notification area. </p>
+ </li>
+
+ <li>In the Android Auto app, make sure the <strong>Only connect to known cars</strong> option
+ is disabled.</li>
+
+ <li>Connect the mobile device to the development machine via USB.</li>
+
+ <li>Make sure the mobile device has its screen unlocked, otherwise it cannot launch the DHU.</li>
+
+ <li>On the development machine, run the following {@code adb} command to
+ forward socket connections from the
+ development machine's port 5277 to the same port number on the Android device.
+ This configuration allows the DHU to connect to the head unit server running on your phone over
+ a TCP socket.
+ <pre class="no-pretty-print">$ adb forward tcp:5277 tcp:5277</pre>
+ </li>
+
+ <li>Start the DHU by running the command <code>desktop-head-unit.exe</code> (on Windows)
+ or <code>./desktop-head-unit</code> (on Mac or Linux) from the
+ <code><sdk>/extras/google/auto/</code> directory.
+
+<pre class="no-pretty-print">$ cd <sdk>/extras/google/auto
+$ ./desktop-head-unit</pre>
+
+ <p>
+ By default, the head unit server connects over port 5277. To override the host or port
+ (for example, to forward over SSH), use the
+ <code>desktop-head-unit --adb <[localhost:]port></code> flag, as in
+ the following example:
+ </p>
+
+ <pre class="no-pretty-print">$ ./desktop-head-unit --adb 5999</pre>
+ <p>
+ By default, the DHU emulates the most common form of Android Auto-compatible
+ head unit, which uses a touch screen user interface. You can simulate user
+ touches by clicking the DHU with a mouse. To emulate head units which use
+ a rotary controller for input, you can use the <code>-i controller</code> flag,
+ as in this example:
+ </p>
+ <pre class="no-pretty-print">$ ./desktop-head-unit -i controller</pre>
+ <p>
+ When the DHU is in rotary-controller mode you can simulate controller
+ operations by using keyboard shortcuts, as described in <a href=
+ "#cmd-bindings">DHU commands and key bindings</a>. If the DHU is in rotary
+ controller mode, it ignores mouse clicks; you must operate Android Auto with
+ the simulated rotary controller operations.
+ </p>
+ </li>
+</ol>
+
+
+
+
+<div class="figure" style="width:432px">
+
+ <img src="{@docRoot}images/training/auto-desktop-head-unit-wkst-launch.png"
+ alt="" >
+ <p class="img-caption">
+ <strong>Figure 4.</strong> DHU launches on the development machine.
+ </p>
+</div>
+
+ <img src="{@docRoot}images/training/auto-desktop-head-unit-launch.png"
+ alt="" >
+ <p class="img-caption">
+ <strong>Figure 3.</strong> Android Auto launches on the mobile device.
+ </p>
+
+<p>
+ After you set up and start the DHU, you can run DHU commands from the command
+ line to run and test your app from the terminal. You can also run these commands
+ by using keyboard shortcuts.
+</p>
+
+<h2 id="dhu-commands">Issuing DHU Commands</h2>
+
+<p>
+ DHU commands allow you to test your app with Android Auto features, such as
+ playing voice input or switching between night and day display mode. You can issue commands to
+ the DHU by running commands from the terminal window where you launched DHU.
+ You can also issue commands by selecting the DHU window and
+ using keyboard shortcuts. The DHU commands
+ and key bindings for all controls are listed in <a href="#cmd-bindings">DHU
+ commands and key bindings</a>.
+</p>
+
+
+<h3 id="day-night">Switching between day and night mode</h3>
+
+<p>
+ Android Auto supports different color schemes for day and night. You should test your app in both
+ day and night mode. You can switch between night and day mode in either of the
+ following ways:
+</p>
+
+<ul>
+ <li>Run the command <code>daynight</code> in the terminal where you launched the DHU.
+ </li>
+
+ <li>Select the DHU window and press the <strong>N</strong> key.
+ </li>
+</ul>
+
+<h3>Microphone testing</h3>
+
+<p>The DHU supports using a microphone for voice input. You can also instruct the DHU to treat
+a pre-recorded voice track as input, as if the DHU had heard the track through the microphone.</p>
+
+<p>To use a pre-recorded sound file as input, enter this command: </p>
+<pre class="no-pretty-print">
+$ mic play <sound_file_path>/<sound_file>.wav
+</pre>
+
+<p>For your convenience, we have provided the following sound files for common
+voice commands. These sound files are installed in the
+<code><sdk>/extras/google/auto/voice/</code> directory.</p>
+
+<dl>
+ <dt>
+ <code>exitnav.wav</code>
+ </dt>
+
+ <dd>
+ "Exit navigation."
+ </dd>
+
+ <dt>
+ <code>navgoogle.wav</code>
+ </dt>
+
+ <dd>
+ "Navigate to 1600 Amphitheatre Parkway, Mountain View."
+ </dd>
+
+ <dt>
+ <code>navsoh.wav</code>
+ </dt>
+
+ <dd>
+ "Navigate to Sydney Opera House."
+ </dd>
+
+ <dt>
+ <code>nextturn.wav</code>
+ </dt>
+
+ <dd>
+ "When is my next turn?"
+ </dd>
+
+ <dt>
+ <code>showalternateroute.wav</code>
+ </dt>
+
+ <dd>
+ "Show alternate routes.""
+ </dd>
+
+ <dt>
+ <code>howlong.wav</code>
+ </dt>
+
+ <dd>
+ "How long until I get there?"
+ </dd>
+
+ <dt>
+ <code>navhome.wav</code>
+ </dt>
+
+ <dd>
+ "Navigate to home."
+ </dd>
+
+ <dt>
+ <code>navwork.wav</code>
+ </dt>
+
+ <dd>
+ "Navigate to work.""
+ </dd>
+
+ <dt>
+ <code>pause.wav</code>
+ </dt>
+
+ <dd>
+ "Pause music."
+ </dd>
+
+ <dt>
+ <code>showtraffic.wav</code>
+ </dt>
+
+ <dd>
+ "Show traffic."
+ </dd>
+</dl>
+<h3 id="cmd-bindings">DHU commands and key bindings</h3>
+
+<p>The DHU supports the following commands.</p>
+
+<p class="table-caption" id="table-commands"><strong>Table 1.</strong> Commands and key bindings</p>
+<table>
+<tr>
+ <th>Category</th>
+ <th>Command</th>
+ <th>Subcommand</th>
+ <th>Argument(s)</th>
+ <th>Keyboard Shortcut(s)</th>
+ <th>Description</th>
+</tr>
+
+<!--system-->
+
+<tr>
+<td rowspan="4">System</td>
+<td>help</td>
+<td></td>
+<td>[command]</td>
+<td></td>
+<td>Shows the full command set. Specifying a command name (for example, <code>help day</code>)
+ causes the system to show help for that command.</td>
+</tr>
+
+<tr>
+
+<td>quit</td>
+<td></td>
+<td></td>
+<td>Alt+q</td>
+<td>Quits the head unit.</td>
+</tr>
+
+<tr>
+
+<td>sleep</td>
+<td></td>
+<td>[seconds]</td>
+<td></td>
+<td>Sleeps for one second. Specifying an argument (for example, <code>sleep 30</code>) causes the
+system to sleep the specified number of seconds. This command
+is useful if you are writing scripts for the DHU. (You can run a script by using I/O redirection
+from the command line: <code>./desktop-head-unit < script.txt</code> loads commands from the
+file <code>script.txt</code>.)</td>
+</tr>
+
+<tr>
+
+<td>screenshot</td>
+<td></td>
+<td>filename.png</td>
+<td></td>
+<td>Saves a screenshot to <code>filename.png</code>.</td>
+</tr>
+
+
+<!--microphone-->
+
+<tr>
+<td rowspan="3">Microphone</td>
+<td rowspan="3">mic</td>
+<td>begin</td>
+<td></td>
+<td>m </td>
+<td>Activates the microphone (equivalent to clicking the steering wheel's microphone button) and
+waits for input from the computer microphone.</td>
+</tr>
+
+<tr>
+
+
+<td>play</td>
+<td>filename.wav</td>
+<td></td>
+<td>Causes the DHU to treat <code>filename.wav</code> as voice input, as if it had heard that sound
+ through the microphone. You do not hear the sound file being played, but you do hear
+ the response from Android Auto.</td>
+</tr>
+
+<tr>
+
+
+<td>repeat</td>
+<td></td>
+<td></td>
+<td>Repeats the last <code>mic play</code> command, as if you had called <code>mic play</code>
+ again with the same sound file parameter.</td>
+</tr>
+
+<!--Input-->
+
+<tr>
+<td rowspan="7">Input</td>
+<td rowspan="6">dpad</td>
+<td>up <br> down <br> left <br> right</td>
+<td></td>
+<td>Arrow keys</td>
+<td>Simulates moving the rotary controller.</td>
+</tr>
+
+<tr>
+
+
+<td>soft left <br> soft right</td>
+<td></td>
+<td>Shift+Arrow keys</td>
+<td>Simulates pressing the side buttons available on some rotary controllers.</td>
+</tr>
+
+<tr>
+
+
+<td>click</td>
+<td></td>
+<td>Return</td>
+<td>Simulates pressing the rotary controller.</td>
+</tr>
+
+<tr>
+
+
+<td>back</td>
+<td></td>
+<td>Backspace</td>
+<td>Simulates pressing the <strong>back</strong> button available below some rotary
+ controllers.</td>
+</tr>
+
+<tr>
+
+
+<td>rotate left <br> rotate right</td>
+<td></td>
+<td>1 <br> 2</td>
+<td>Simulates rotating the rotary controller left (counter-clockwise) or right (clockwise).</td>
+</tr>
+
+<tr>
+
+
+<td>flick left <br> flick right</td>
+<td></td>
+<td>Shift+1 <br> Shift+2</td>
+<td>Simulates a fast spin of the rotary controller to the left (counter-clockwise) or right
+ (clockwise).</td>
+</tr>
+
+<tr>
+
+<td>tap</td>
+<td></td>
+<td>x y</td>
+<td></td>
+<td>Simulates a touch event at the specified coordinates. For example, <code>tap 50 100</code></td>
+</tr>
+
+
+<!--Day/Night-->
+
+<tr>
+<td rowspan="3">Day/Night</td>
+<td>day</td>
+<td></td>
+<td></td>
+<td>Shift+n</td>
+<td>Activates day mode (high brightness, full color).</td>
+</tr>
+
+<tr>
+
+<td>night</td>
+<td></td>
+<td> </td>
+<td>Ctrl+n </td>
+<td>Activates night mode (low brightness, high contrast).</td>
+</tr>
+
+<tr>
+
+<td>daynight</td>
+<td></td>
+<td></td>
+<td>n </td>
+<td>Toggles current day/night mode.</td>
+</tr>
+
+</table>
+
+
+
+
+<h2 id="auto-simulators">Media Browser and Messaging Simulators</h2>
+
+<p class="caution"><strong>Important:</strong> Use of the Android Media Browser and Messaging
+Simulators for testing Android Auto apps is deprecated. Instead, we recommend using the
+Desktop Head Unit, which enables your development machine to act as if it were an Android Auto head
+unit.</p>
+
+<p>To get the simulators, open the
+<a href="{@docRoot}tools/help/sdk-manager.html">SDK Manager</a> and download
+them from <strong>Extras > Android Auto API Simulators</strong>.</p>
+
+<p>Before you begin testing, compile your app in your development environment.
+Install your app and the Android simulator for the features you want to test
+(that is, audio or messaging) on a physical or virtual device running Android
+5.0 (API level 21) or higher. To check the version of Android on the device, go
+to <strong>Settings > About phone</strong> (or <strong>About tablet</strong>)
+<strong>> Android Version</strong>.</p>
+
+<h3 id="testing-audio-apps">Testing audio apps</h3>
+<p>To run and test audio apps:</p>
+
+<ol>
+<li>Install the Android Media Browser simulator
+({@code <sdk>/extras/google/simulators/media-browser-simulator.apk}) on
+the test device. You can do this using
+the <a href="{@docRoot}tools/help/adb.html#move">adb</a> command line tool.</li>
+<li>Enable <a href="{@docRoot}tools/device.html#developer-device-options">
+developer options</a> on the test device.</li>
+<li>Install your app on the test device.</li>
+<li>Launch the Android Media Browser simulator to see how your audio app
+appears in Auto. If your app does not appear, stop the simulator from
+<strong>Settings > Apps</strong> and restart it.</li>
+</ol>
+
+
+<h3 id="testing-messaging-apps">Testing messaging apps</h3>
+<p>To run and test messaging apps:</p>
+
+<ol>
+<li>Install the Android Messaging simulator
+ ({@code <sdk>/extras/google/simulators/messaging-simulator.apk})
+on the test device. You can do this using the
+<a href="{@docRoot}tools/help/adb.html#move">adb</a> command line tool.</li>
+<li>Enable the simulator to read notifications posted on the system:
+<ol type="a">
+ <li>Enable <a href="{@docRoot}tools/device.html#developer-device-options">
+developer options</a> on the test device.</li>
+ <li>Click <strong>Settings > Sounds & Notifications > Notification
+ Access</strong> and check the box labeled
+ <strong>Messaging Simulator</strong>.</li>
+</ol>
+<li>Install your app on the test device.</li>
+<li>Launch the Android Messaging Simulator to see how your messaging app appears
+in Auto. If your app does not appear, stop the simulator from
+<strong>Settings > Apps</strong> and restart it.</li>
+</ol>
+
+
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