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Testing your machine app ensures that users don't encounter unexpected results or a poor experience. How you lot test your app depends on whether your app will be running on Android Auto or Android Automotive Os.

Meet one of the post-obit sections to get started:

• Test your app for Android Auto.
• Test your app for Android Automotive OS.

Exam your app for Android Auto

The Desktop Head Unit (DHU) enables your development machine to emulate an Android Auto head unit, so that y'all tin run and test Android Automobile apps. The DHU runs on Windows, macOS, and Linux systems.

This section teaches you how to install and run the DHU on your development machine to examination your apps. After you've installed the DHU, you can test your Android Auto apps past connecting your phone to information technology via adb forwarding.

To report bugs or request features related to the DHU, use this effect tracker.

Install the DHU

The latest bachelor version of the DHU is 2.0 rc2. This version includes features that are not available in the previous version (1.1) and is the recommended version to install and use. If you are experiencing bug with version 2.0 rc2, you lot tin can install version 1.one instead.

Install DHU version 2.0 rc2

Follow these steps to install DHU 2.0 rc2 on your development machine:

1. Enable programmer style on a mobile device running Android 6.0 (API level 23) or higher, as described in Enabling on-device developer options.
2. Compile and install your app on the device.
3. Install Android Automobile on the device. If Android Auto is already installed, make sure that you are using the latest version.
4. Open up Android Studio and switch Android Studio to use the Beta aqueduct. If you are prompted to update to a newer version of Android Studio, you can ignore the update.

5. Open the SDK Manager and navigate to the SDK tools tab, then download version 2.0 rc2 of the Android Auto Desktop Head Unit of measurement Emulator parcel.

   

   The DHU is installed in the SDK_LOCATION/extras/google/car/ directory. Subsequently the download has finished, you can switch Android Studio dorsum to the Stable aqueduct if you don't want to use the Beta channel version of other tools.

6. On Linux or macOS systems, run the following control to ensure the DHU binary is executable:

   chmod +ten ./desktop-caput-unit            

Additional steps for Linux only

If you are running version two.0 rc2 on a Linux organisation, you lot need to install some boosted libraries. The DHU binary depends on GLIBC version two.32 or above. You tin can check the GLIBC version of your arrangement by running this command:

ldd --version        

If the version is lower than 2.32, y'all must either update GLIBC to 2.32 or higher up, or upgrade the OS to a version that is compatible with GLIBC 2.32 or above.

You must also install the libc++ane and libc++abi1 libraries. The installation process varies depending on your Linux distribution. For example, on Debian-derived Linux distributions, you lot tin can install the libraries with this command:

sudo apt-get install libc++1 libc++abi1        

Install DHU version 1.ane

If y'all are encountering issues with version 2.0 rc2, follow these steps to install DHU i.ane on your evolution automobile:

1. Enable developer mode on a mobile device running Android 6.0 (API level 23) or higher, every bit described in Enabling on-device developer options.
2. Compile and install your app on the device.
3. Install Android Automobile on the device. If Android Auto is already installed, brand sure that you are using the latest version.
4. Open Android Studio and bank check that Android Studio is using the Stable channel.

5. Open the SDK Manager and navigate to the SDK tools tab, then download version 1.1 of the Android Auto Desktop Caput Unit Emulator bundle.

   The DHU is installed in the SDK_LOCATION/extras/google/motorcar/ directory. After the download has finished, you lot can switch Android Studio back to another update channel if yous don't desire to use the Stable channel version of other tools.

6. On Linux or macOS systems, run the following command to ensure the DHU binary is executable:

   chmod +x ./desktop-head-unit of measurement            

Additional steps for Linux only

If you are running version 1.1 on a Linux system, you need to install some additional libraries. Install the portaudio, libpng, sdl2, and sdl2_ttf libraries. The installation process varies depending on your Linux distribution. For case, on Debian-derived Linux distributions, you can install the libraries with this control:

sudo apt-become install libsdl2-ii.0-0 libsdl2-ttf-2.0-0 libportaudio2 libpng12-0        

Run the DHU

Later you install the DHU, you tin can test your Android Car apps by connecting your phone and workstation via USB. Run the DHU by connecting your mobile device to a evolution auto and setting up a connection to the head unit of measurement server over Android Debug Bridge (ADB).

Follow these steps to ready tunneling and run the DHU:

1. Do one of the post-obit to open the Android Motorcar settings, depending on the version of Android running on the device:

   • Android 10 or higher: On the device tap Settings > Apps & notifications > See all apps > Android Auto > Advanced > Additional settings in the app.
   • Android 9 or lower: In the Android Auto app, tap the Menu, so tap Settings.

2. Curl to the Nigh section near the lesser and tap Version to display all of the version and permission information.

3. Tap the Version and permission info section 10 times.

   The Let evolution settings dialog appears.

4. Tap OK.

   Programmer mode is now enabled and you can access developer options in the overflow menu. You but demand to enable developer mode the outset fourth dimension you lot run the Android Auto app.

5. If the head unit server is not already running, tap the iii dots in the peak correct of the screen to open the overflow menu and select Offset caput unit server (see figure 1).

   On the device, a foreground service appears in the notification surface area that indicates that the server is running (see figure 2).

   

   Figure one. Context carte with programmer options.

   

   Figure two. Notification that the head unit server is running.

6. In the Android Machine app, tap Previously continued cars near the top of the Settings, and ensure Add together new cars to Android Auto is enabled.

7. Connect the mobile device to the development automobile via USB.

8. Make certain the mobile device has its screen unlocked; otherwise it cannot launch the DHU.

9. On the development automobile, run the post-obit adb command to forward socket connections from the development machine's port 5277 to the same port number on the Android device. This configuration enables the DHU to connect to the caput unit of measurement server running on your phone over a TCP socket.

   adb forrad tcp:5277 tcp:5277            

10. Start the DHU by running the command desktop-head-unit of measurement.exe (on Windows) or ./desktop-caput-unit of measurement (on macOS or Linux) from the SDK_LOCATION/extras/google/auto/ directory.

                  cd                SDK_LOCATION/extras/google/auto              desktop-head-unit.exe                # Windows                            ./desktop-head-unit                # macOS or Linux                          

    

11. If this is the first fourth dimension you are connecting the mobile device to the DHU, check the mobile device's screen to accept the terms of service and suit permission settings as needed.

After the DHU has started, yous tin can use DHU console commands to run and test your app.

Command line options

Past default, the head unit server connects over port 5277. To override the host or port (for case, to forward over SSH), utilize the --adb=<[localhost:]port> flag, as in the following example:

./desktop-caput-unit --adb=5999        

By default, the DHU emulates a Android Auto-uniform caput unit of measurement with a touch screen user interface. Y'all can simulate user touches by clicking the DHU with a mouse. To emulate head units that use a rotary controller for input, you can use the -i controller flag, every bit in this example:

./desktop-head-unit -i controller        

When the DHU is in rotary-controller mode, you can employ keyboard shortcuts to simulate controller operations. See the Rotary Controller for more than details. In rotary controller fashion, the DHU ignores mouse clicks; you must operate Android Car with the simulated rotary-controller operations.

The full gear up of command line options that the DHU supports vary depending on whether you are using version 2.0 rc2 or 1.one.

Version ii.0 rc2

Option	Clarification
c, --config=FILE	Use the specified configuration .ini file. Refer to the Configure the DHU section for more details.
i, --input=INPUT	Apply specified input mode, ane of: touch, rotary, or hybrid.
-a, --adb=HOSTPORT	Use ADB send (optional host:port or port ). Defaults to port 5277.
v, --version	Bear witness version information.
l, --licenses	Prove open source licenses.
h, --headless	Run in headless mode (no UI).
?, --help	Show this help listing.

Version 1.1

Option	Description
i, --input=INPUT	Employ specified input mode, 1 of: impact or rotary.
-a, --adb=HOSTPORT	Utilize ADB ship (optional host:port or port ). Defaults to port 5277.
v, --version	Show version data.
l, --licenses	Show open source licenses.
h, --headless	Run in headless mode (no UI).

DHU User Guide (2.0 rc2)

This department describes the features supported by version 2.0 rc2 of the DHU and how to utilise them.

Commands are entered in the terminal window where you started DHU. Multiple commands can be run on the same line by separating them with a ;.

Arrangement

Command	Key	Description
help [command]		Shows total command set. If a command name is specified (for example, help solar day), shows help for that control.
quit get out	Alt+Q	Quits the head unit of measurement.
sleep [seconds]		Sleeps for 1 second. If a delay is specified, sleeps that many seconds . This tin exist used for scripting the head unit of measurement (./desktop-head-unit < script.txt), for example in a CI environment.
screenshotfilename.png		Saves a screenshot to filename.png.
licenses		Display licenses of libraries used in DHU
keycode keycode		Send keycode, one of the names listed in the Keycodes section.

Touch on and Touchpad

When touch or touchpad is enabled, clicking in either the brandish window (for affect) or touchpad window (for touchpad) will be registered as touch events.

For touch, you can simulate multi-affect by correct clicking on the first finger location, and then click-and-concord the correct button for the 2nd finger. The centerpoint of the ii fingers remains fixed and moving the mouse will allow you to either rotate them around the center or pinch in-and-out (or both).

For touchpad, click-and-concord the left button to roll between different UI elements on the screen. Clicking the right button volition select the element that currently has focus.

Control	Key	Description
tap ten y		Simulate a touch on event at the specified coordinates

Rotary Controller

The DHU has rotary controller support. When it is enabled, the following actions are supported:

• Upwards, downwardly, left, and right on the Dpad
• Rotating clockwise and counterclockwise
• Performing a rotation flick (5 steps at once)
• Clicking downward on the controller and back on the controller

The commands and key bindings are listed below.

A coil bicycle on a mouse will transport dpad rotate commands, and the centre mouse push click (usually the curl bike) will ship dpad click commands.

Notation that well-nigh cars have touch screens. Some cars take rotary controller-only, and some have a hybrid touch and controller. Cars tin likewise support a touchpad which can be used for map panning and text entry. Bear these unlike configurations in heed when simulating different vehicle head units.

Control	Key	Description
dpad {up|down|left|right}	Arrow keys	Move of the rotary controller.
dpad {ur|dl|ul|dr}		Movement of the rotary controller.
dpad soft {left|right}	Shift + Pointer keys	Side buttons available on some rotary controllers.
dpad click	Return	Pressing the rotary controller.
dpad back	Backspace	Back button available beneath some rotary controllers.
dpad rotate left	1	Rotary controller left (counter-clockwise) movement.
dpad rotate right	2	Rotary controller right (clockwise) motility.
dpad flick left	Shift+1	Fast counter-clockwise spin of the rotary controller.
dpad motion picture right	Shift+two	Fast clockwise spin of the rotary controller.
dpad 0-nine*#+	Num pad

Microphone

The DHU supports using a microphone for voice input or playing a pre-recorded voice rail. For your convenience, nosotros accept provided the post-obit sound files for mutual vocalism commands. These sound files are installed in the SDK_LOCATION/extras/google/auto/voice/ directory.

File proper name	Text
navhome.wav	Navigate to home.
navwork.wav	Navigate to work.
navsoh.wav	Navigate to Sydney Opera House.
navgoogle.wav	Navigate to 1600 Amphitheatre Parkway, California, United states of america.
exitnav.wav	Exit navigation.
howlong.wav	How long until I get there?
showtraffic.wav	Bear witness traffic.
showalternateroute.wav	Show alternate routes.
break.wav	Pause music
nextturn.wav	When is my side by side turn?

To run an private .wav file in the DHU prompt:

mic play /path/to/filename.wav        

Control	Cardinal	Clarification
mic brainstorm	M	Activates the microphone (equivalent to clicking the steering-wheel push button) and waits for input from the computer microphone.
mic play filename.wav		Activates the microphone and plays the specified WAV file recording. Note: You volition not hear the WAV file beingness played, simply you volition hear the response from Android Car.
mic repeat		Repeats the last recording used with mic play.
mic reject {on|off}		Enables or disables rejection of microphone requests. When on, all microphone requests volition be rejected.

Sensors

The DHU supports simulating changes in the vehicle's sensor data with the following commands. To mock sensor data and send them to Android Auto, the corresponding sensors take to be enabled with the configuration .ini file when starting the DHU.

Command	Description
fuel [percentage]	Set up the fuel level to the specified percent, or do not laissez passer in a value to disable fuel level.
range [km]	Prepare the range to the specified kilometers, or do not pass in a value to disable range data.
lowfuel [{on|off}]	Set the depression fuel warning sensor, or do not laissez passer in a value to disable the sensor.
accel [x] [y] [z]	Set the accelerometer to the specified x, y, and z values (m/s^2), or do non laissez passer in parameters to unset the accelerometer information. Pass in NAN to skip optional parameters if needed.
compass bearing [pitch] [curlicue]	Set the compass to the specified begetting, pitch, and roll values (degrees). Pass in NAN to skip optional parameters if needed.
gyro [x] [y] [z]	Set up the gyroscope to the specified 10, y, and z rotation speed (rad/s), or practise not pass in parameters to unset the gyroscope information. Pass in NAN to skip optional parameters if needed.
location lat long [accuracy] [altitude] [speed] [bearing]	Set the location to the specified lat and long values forth with the optional accuracy (thousand), distance (m), speed (m/s), and bearing (degrees). Pass in NAN to skip optional parameters if needed.
odometer km [current_trip_km]	Set up the odometer to the specified kilometers forth with an optional current trip km value.
speed [speed]	Set the vehicle speed to the specified value (1000/s), or exercise non pass in a value to disable the sensor.
tollcard {insert|remove}	Indicates whether a price card was inserted or removed.

Day/Night Mode

The DHU supports simulating changing betwixt day and dark style with the following commands and key bindings.

Command	Central	Clarification
day	Shift+N	Activate day mode (high-effulgence, total color).
night	Ctrl+Northward	Activate night manner (low-brightness, high-dissimilarity).
daynight nightday	Due north	Toggle current day or nighttime manner.

Focus Direction

The DHU supports simulating whether or non Android Auto has focus on the caput unit with the post-obit commands.

Command	Description
focus video {on|off|toggle}	Enables or disables whether Android Auto has video focus on the head unit of measurement. Turning off video focus simulates the head unit going into native mode.
focus audio {on|off|toggle}	Enables or disables whether Android Automobile has audio focus on the caput unit of measurement. Turning off audio focus simulates the head unit playing its own audio source.
focus nav {on|off|toggle}	Enables or disables whether Android Machine has navigation focus on the caput unit. Turning off navigation focus simulates the head unit of measurement running its own navigation organisation.

Restrictions/Driving Status

The DHU supports simulating sure restrictions when the vehicle is moving, such as disabling the keyboard and disallowing phone configurations.

Control	Key	Clarification
restrict none	U	Disables all restrictions.
restrict all	Shift+U	Enables all restrictions (for example, to simulate driving).

Instrument Cluster

The DHU supports emulating an instrument cluster (usually located behind the steering wheel) which shows basic info during navigation about the side by side turn (such as the adjacent road proper name, distance/fourth dimension, or a plough arrow) and data almost an ongoing telephone call.

This can exist enabled using the instrumentcluster entry in the configuration file, or by the navcluster or phonecluster entries to command each feature separately.

Media Playback Status

The DHU supports an additional information display to show media playback status, for example, what track is playing.

This tin can be enabled using the playbackstatus entry in the configuration file.

Keycodes

The DHU provides a set of default keycodes that simulates the set up of shortcut buttons that are unremarkably available in unlike vehicles. For example, the home keycode can exist triggered in the DHU prompt as follows:

keycode home        

Keycode	Description
home	Go to the home screen.
back	Go back.
phone call endcall	Make or cease a call.
search	Trigger search.
media_play_pause media_play media_pause	Play or pause a media.
media_next media_previous	Go to the adjacent or previous media runway.
media	Go to the default media app.
navigation	Go to the default navigation app.
tel	Go to the default telephone app.

Configure the DHU

The DHU supports a configuration .ini file to change the input modes available (impact, controller), the frame charge per unit, resolution and DPI the head unit requests from the phone.

The default location for the configuration file is ~/.android/headunit.ini. If you wish to change the configuration of the head unit on your organisation, you tin modify this file.

Yous tin too specify a configuration file to load using the -c flag.

          ./desktop-head-unit -c /path/to/config.ini                  

Sample configuration

          [general] touch = true touchpad = imitation controller = imitation instrumentcluster = fake resolution = 800x480 dpi = 160 framerate = 30 fueltypes = unleaded,electric,hydrogen evconnectors = supercharger                  

Sample configuration files can exist found under the SDK_LOCATION/extras/google/auto/config/ folder to demonstrate different head unit of measurement settings you can test against. For more avant-garde apply cases, delight refer to the supported settings beneath.

Input Configuration

Name	Default	Type	Description
inputmode	default	String	Defines the input mode. The options touch, rotary, hybrid enable and disable touchscreen and rotary support and ready default keycodes as appropriate, while default defers to the touch and controller options beneath.
controller	false	Boolean	Enable rotary controller input. Ignored unless inputmode is default.
affect	true	Boolean	Enables touchscreen. Ignored unless inputmode is default.
touchpad	simulated	Boolean	Enables touchpad.
touchpadnavigation	false	Boolean	Enables touchpad to exist used for UI navigation.
touchpadtapasselect	false	Boolean	When truthful, a tap on the touchpad is a select event.
touchpaduiabsolute	false	Boolean	When touchpadnavigation is true, this sets whether the touches should be treated equally absolute or every bit gestures.

Video Configuration

Android Motorcar supports three video resolutions:

1. 480p (800x480 -- default)
2. 720p (1280x720)
3. 1080p (1920x1080)

To back up dissimilar aspect ratios other than the ones to a higher place, the head unit is able to specify a margin to letterbox/pillarbox as necessary. For instance, if you lot wanted a 1000x600 screen, you would set the resolution to 720p (1280x720) and a marginwidth of 280 and marginheight of 120. This has the effect of adding a 140px margin on both the left and right edges, and 60px top and bottom.

Example configuration to emulate a typical vi inch screen (750x450):

          [general] ... resolution = 800x480 marginwidth = 50 marginheight = thirty                  

And a very-wide screen:

          [full general] ... resolution = 1280x720 marginwidth = 0 marginheight = 220                  

Name	Default	Blazon	Description
resolution	800x480	Strings	One of: 800x480, 1280x720, 1920x1080.
dpi	160	Integer
normalizedpi	false	Boolean	When truthful, reduces DHU window size to account for larger DPI values. When false, larger DPI values result in larger windows (which does not mimic real displays, but does allow easier inspecting of visual content).
realdpi	160	Integer	Used in video configuration.
framerate	30	Integer	Used in video Configuration.
marginheight	0	Integer	Used in video configuration.
marginwidth	0	Integer	Used in video configuration.
margins	0,0,0,0	String	Used in video configuration, overrides marginwidth and marginheight if present. Format is acme, bottom, left, right.
contentinsets	0,0,0,0	String	Used in video configuration. Format is top, lesser, left, right.
stablecontentinsets	0,0,0,0	String	Used in video configuration. Defaults to the value of contentinsets. Format is top, bottom, left, right.
cropmargins	false	Boolean	If margins, marginheight, or marginwidth is specified, a true value for this setting removes those margins from the displayed video. This reflects more than closely what the stop user sees.
pixelaspectratio	1.0	Float	Used in video configuration.

Sensors Configuration

To mock sensor data and transport them to Android Auto, the respective sensors accept to exist enabled using the options below. If a sensor is disabled, any data sent for that sensor using the DHU commands is ignored.

Name	Default	Type	Clarification
accelerometer	fake	Boolean	Enable accelerometer sensor data.
compass	false	Boolean	Enable compass sensor data.
driving_status	false	Boolean	Enable driving status sensor data.
fuel	faux	Boolean	Enable fuel sensor data.
gyroscope	false	Boolean	Enable gyroscope sensor data.
location	false	Boolean	Enable vehicle location sensor data.
night_mode	false	Boolean	Enable night mode sensor information.
odometer	faux	Boolean	Enable odometer sensor data.
speed	false	Boolean	Enable speed sensor data.
toll_card	false	Boolean	Enable cost carte sensor data.

Miscellaneous

Proper name	Default	Blazon	Description
instrumentcluster	faux	Boolean	Enable instrument cluster. Adds a window to the UI to display navigation and telephone condition.
navcluster	false	Boolean	Enable instrument cluster. Adds a window to the UI to display navigation status.
phonecluster	false	Boolean	Enable instrument cluster. Adds a window to the UI to brandish telephone status.
playbackstatus	faux	Boolean	Enable playback status. Adds a window to the UI to display playback status messages.
driverposition	left	String	One of: left, centre, or right.
windowleft		Integer	Set the left position of the primary window.
windowtop		Integer	Prepare the tiptop position of the main window.
fueltypes	unleaded	Strings	I or more of (separated by ,): unleaded leaded diesel-1 diesel fuel-2 biodiesel e85 lpg cng lng hydrogen electric other unknown
evconnectors		Strings	Nada or more of (separated by ,): j1772 mennekes chademo combo-ane combo-2 roadster hpwc gbt supercharger other unknown Should only be set if fueltypes contains electric.

DHU User Guide (ane.1)

DHU commands permit you to test your app with Android Motorcar features, such as playing vocalisation input or switching between night and day display style. You tin issue commands to the DHU from the terminal window where you launched the DHU. You can as well consequence commands by selecting the DHU window and using keyboard shortcuts. The DHU commands and key bindings for all controls are listed in DHU commands and key bindings.

Switch between solar day and dark style

Android Machine supports different color schemes for twenty-four hours and night. You should test your app in both day and night mode. You tin can switch between night and solar day mode in either of the following ways:

• Run the command daynight in the terminal where you launched the DHU.
• Select the DHU window and press the N cardinal.

Microphone testing

The DHU supports using a microphone for voice input. You lot can too instruct the DHU to care for a prerecorded voice runway as input, as if the DHU had heard the rail through the microphone.

To use a prerecorded sound file as input, enter this command:

mic play          <sound_file_path>/<sound_file>.wav        

For your convenience, we have provided the following sound files for common vocalism commands. These audio files are installed in the <sdk>/extras/google/auto/voice/ directory.

File name	Text
navhome.wav	Navigate to habitation.
navwork.wav	Navigate to work.
navsoh.wav	Navigate to Sydney Opera Firm.
navgoogle.wav	Navigate to 1600 Amphitheatre Parkway, California, U.s..
exitnav.wav	Exit navigation.
howlong.wav	How long until I become there?
showtraffic.wav	Show traffic.
showalternateroute.wav	Evidence alternate routes.
intermission.wav	Intermission music
nextturn.wav	When is my side by side turn?

DHU commands and key bindings

The DHU supports the post-obit commands.

Table 1. Commands and key bindings

Category	Command	Subcommand	Argument(s)	Keyboard Shortcut(s)	Clarification
System	assist		[control]		Shows the full command fix. Specifying a control proper noun (for instance, help solar day) causes the system to show help for that command.
	quit			Alt+q	Quits the head unit.
	sleep		[seconds]		Sleeps for 1 2nd. Specifying an statement (for example, sleep 30) causes the system to sleep the specified number of seconds. This command is useful if you are writing scripts for the DHU. (Yous can run a script past using I/O redirection from the command line: ./desktop-head-unit of measurement < script.txt loads commands from the file script.txt.)
	screenshot		filename.png		Saves a screenshot to filename.png.
Microphone	mic	begin		thou	Activates the microphone (equivalent to pressing the microphone push on the steering wheel) and waits for input from the computer microphone.
		play	filename.wav		Causes the DHU to treat filename.wav as voice input, as if that sound were relayed through the microphone. You lot do not hear the sound file being played, but y'all do hear the response from Android Auto.
		repeat			Repeats the final mic play command, as if y'all had called mic play again with the aforementioned sound file parameter.
Input	dpad	up down left right		Arrow keys	Simulates moving the rotary controller.
		soft left soft right		Shift+Arrow keys	Simulates pressing the side buttons available on some rotary controllers.
		click		Return	Simulates pressing the rotary controller.
		dorsum		Backspace	Simulates pressing the back button bachelor below some rotary controllers.
		rotate left rotate right		1 2	Simulates rotating the rotary controller left (counter-clockwise) or right (clockwise).
		flick left flick right		Shift+ane Shift+2	Simulates a fast spin of the rotary controller to the left (counter-clockwise) or correct (clockwise).
	tap		x y		Simulates a touch outcome at the specified coordinates. For example, tap 50 100
Twenty-four hour period/Night	day			Shift+Northward	Activates solar day mode (loftier brightness, full color).
	night			Control+N	Activates dark mode (low brightness, high contrast).
	daynight			due north	Toggles current 24-hour interval/nighttime mode.

Troubleshooting

DHU showing a blank screen when beginning connected

This is a known issue we are working on. You can work around this by doing the post-obit:

1. Shut the DHU.
2. Follow Step 5 described in Run the DHU to stop and restart the Head Unit Server.
3. Offset the DHU again.
4. There may be additional permission granting steps on the phone screen. Complete those steps and the DHU might shut downwards once more than.
5. Restart the DHU.

Test your app for Android Automotive OS

Yous can employ the Android Emulator to examination how your driver-optimized app runs on an Android Automotive OS vehicle display. This department describes how to set up an Android Virtual Device (AVD) to test your app.

Edit your run configurations for media apps

Media apps on Automotive OS apps are different than other Android apps. Android Automotive Bone interacts with your media app using explicit intents and by sending calls to your media browser service.

In order to test your app, verify that your app has no launch action in its manifest, and then prevent your automotive module from launching with an activity by post-obit these steps:

1. In Android Studio, select Run > Edit Configurations.

   

2. Select your automotive module from the list of modules in your app.

3. Under Launch Options > Launch, select Nothing.

4. Click Apply, and so click OK.

Add together system images

Before you tin create AVDs that friction match specific manufacturer hardware, you need to add arrangement images for these devices through the Android Studio SDK Manager. And then, when you're creating an AVD, you can download these arrangement images to utilise with the AVD.

Add organization images from machine manufacturers

Currently, you tin add OEM-specific organisation image for the Polestar 2 & Volvo. Follow these steps to add together a organisation image:

1. In Android Studio, select Tools > SDK Manager.
2. Click the SDK Update Sites tab.
3. Click Add .

4. Enter the post-obit Name and URL, so click OK:

   Name: Polestar 2 System Image

   URL: https://developer.polestar.com/sdk/polestar2-sys-img.xml

   Name: Volvo System Paradigm

   URL: https://developer.volvocars.com/sdk/volvo-sys-img.xml

5. Click Apply, then click OK.

Install generic organization images

Android Studio also includes a generic organization image for Android Automotive Os that you tin also use to examination your app. This generic arrangement image includes the Google Assistant and then that you can test your app'southward integration.

Follow these steps to install the generic arrangement image:

1. In Android Studio, select Tools > SDK Manager.
2. Click the SDK Platforms tab.
3. Click Show Package Details.
4. Under Android 9.0 (Pie), select Automotive Intel x86 Atom System Paradigm.

5. Click Utilise, and so click OK.

   

Create a motorcar AVD and run the emulator

Follow these steps to create an Android Virtual Device (AVD) that represents an Android Automotive Os vehicle and and so use that AVD to run the emulator:

1. In Android Studio, select Tools > AVD Managing director.
2. Click Create Virtual Device.
3. From the Select Hardware dialog, select Automotive, and and then select a device and click Adjacent.
4. Select a system image that targets Automotive, such as Android 9.0 (Automotive), and click Next.
5. Name your AVD and select any other options that you desire to customize and then click Stop.
6. From tool window bar, select your Android Automotive Bone AVD every bit your deployment target.
7. Click Run .

Test your app for telephone screens

Follow the steps below to sideload your app onto a telephone and test.

Step ane. In the Android Auto app, enable Developer mode and unknown sources

1. Install the Android Motorcar app, available on Google Play, on your phone. If Android Machine is already installed, make sure that y'all are using the latest version.
2. In the Android Machine app, tap the Hamburger menu, so tap Settings.
3. Whorl to the About section almost the lesser and tap Version to brandish all of the version and permission information.
4. Tap the Version and permission info department 10 times.

   The Permit development settings dialog appears.

5. Tap OK.
6. Tap the three dots in the top correct of the screen to open the overflow menu, then tap Developer Settings.
7. Tap Application Mode and select Developer.

   The app returns to the list of programmer settings.

8. Scroll downward until you see Unknown sources and tap the checkbox.
9. Restart Android Automobile.

Pace 2. On your phone, enable USB debugging

1. In Settings > About phone, tap Build number seven times to enable the Programmer Options.
2. Get dorsum to Settings > Developer Options, enable USB debugging.

Step 3. Install your app onto the phone and test

1. Connect the phone to your machine through USB, so you lot tin can install apps straight to information technology as you develop. Apply the adb devices command to ensure that your development estimator can detect your device when connected via USB.

2. Once your device is set up and continued via USB, navigate to your SDK's platform-tools/ directory and install the .apk on the device past running the following command:

   adb -d install              path/to/your/app.apk            

   You can at present examination your app and verify that everything works.

Additional testing requirements for media apps

If you are testing a media app, then yous should too test for the scenarios that are covered in this section (in addition to testing your app on Android Auto, Android Automotive OS, or both).

Examination MediaBrowseService startup scenarios

To assistance continue drivers and passengers safe, users take additional restrictions on how they can interact with apps while driving. For this reason, Android Motorcar and Android Automotive OS have some MediaBrowserService startup scenarios that your app must be able to handle so that users can go on to savour your content while they're on the road.

Test your app to make sure information technology can handle each of the following scenarios:

• The MediaBrowserService is run before whatsoever Activity is opened.
• The MediaBrowserService is run when no Action tin can be shown.
• The MediaBrowserService is run when the user is not signed in.

While testing for these sceanrios, be sure to try the following methods:

• Force stop the media app, then launch Android Auto or Android Automotive OS.
• Clear the media app data, then launch Android Auto or Android Automotive OS.

Besides make sure to set an appropriate error message when necessary.

Media testing tools

The Media Controller Examination app allows you to exam the intricacies of media playback on Android and helps verify your media session implementation. To get started with this tool, see Using the media controller test app.

DOWNLOAD HERE

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