Android 7.1.1 and later offer system-level support for retail mode sousers may readily examine the devices in action. Android 8.1 revisesthis support to create demo users via Device Policy Manager. Thisallows much greater OEM customization to the standard retail mode.

Android 8.1 and later

Through Device Policy Manager, Android 8.1 supports demonstratingdevice functionality to users in retail stores. While Device Policy Manager'sAPIs can be used on versions prior to 8.1, demo-type users cannot be createdwith createAndManageUser prior to 8.1.

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Implementation

Provisioning

Set Settings.Global.DEVICE_DEMO_MODE to 1 prior toprovisioning to indicate that the device should enter retail mode. SystemServer will use this flag to manage aspects of retail mode, such as powerprofile. In addition, retail employees must grant device ownership to thedemo application. Once a consumer setup is complete, device owners cannotbe set.

Creating the demo application

Device owner apps do not need elevated privileges or pre-installation on thesystem image. They are mostly implemented like traditional apps, with thefollowing differences:

• All device owner apps must extend the DeviceAdminReceivercomponent, which serves as the authorization token for all Device PolicyManager APIs. The component must hold the android.permission.BIND_DEVICE_ADMINpermission, include the requested special policies as metadata, and filter theandroid.app.action.PROFILE_PROVISIONING_COMPLETE and android.app.action.DEVICE_ADMIN_ENABLED intents.
• The DevicePolicyManager#MAKE_USER_DEMO flag, which is setto create special demo-type users, is a hidden API. This flag is a constant 0x4.
• Device ownership can be assigned only via Managed Provisioning.

Device Policy Manager

Device Policy Manager APIs grant all Device Owner (DO) and Profile Owner (PO)rights, except for installing packages, which is automatically allowed. A POaffiliated with a DO can use an AIDL interface to access rights that are onlygranted to the DO. Functionality available includes:

• Create users. Users created through the DevicePolicyManager areautomatically set as PO.
• Switch users.
• Set the permission policy to PERMISSION_POLICY_AUTO_GRANTwhich will automatically grant all runtime permissions. Permissions can also begranted more narrowly: a single permission to a single app. This does notapply to Appops permissions, which users must still grant on a per-user,per-app basis.
• Add user restrictions. Restrictions relevant to retail mode may include,but are not limited to:
  • DISALLOW_MODIFY_ACCOUNTS
  • DISALLOW_USB_FILE_TRANSFER
  • DISALLOW_DEBUGGING_FEATURES
  • DISALLOW_CONFIG_WIFI
  • DISALLOW_CONFIG_BLUETOOTH
  • DISALLOW_INSTALL_UNKNOWN_SOURCES
  • DISALLOW_CONFIG_MOBILE_NETWORKS
• Enable automatic system updates. Devices will automatically download and applyOTA updates.
• Set LockTask allowed packages.
• Factory reset the device.
• Disable the keyguard.
• Prevent setting passwords / fingerprints.
• Control Wi-fi network changes. When used with the DISALLOW_CONFIG_WIFIuser restriction, device owner apps can control access to the wifi network selectionsetting.
• Reboot the device.
• Install packages through PackageInstaller.
• Set a whitelisted set of Settings.Global, Settings.Secure, and Settings.System settings.
• Block packages from being uninstalled.

Examples and additional resources

• Android Developer definitions of users, profiles, and accounts

Validation

CTS does not cover Retail Demo Mode because it is an optional feature. Testingshould be conducted manually or with unit tests for the demo application.

Android 8.0 and earlier

Android 7.1.1 introduced retail demo mode and provided a simple API to play ademonstration video. This implementation was removed in Android 8.1.

Lifecycle

Figure 1. Retail demonstration mode option in Language selection

Setup Wizard (SUW)

Retail employees can enable retail mode directly from the first screen of any setupwizard by selecting the language Retail demo at the bottom ofthe list. This option is available for new devices shipped fresh from thefactory. Once a consumer setup has completed, retail mode may no longer beavailable. Once selected, the device finishes SUW with an abbreviated flow.

Figure 2. Retail demonstration mode option in Languageselection

Guest session

When the device enters retail mode, it switches to a new demo user andautomatically starts the custom launcher specified in the overlay resource(described under Implementation). By default, this custom launcher plays thedemo video on repeat until the user touches the screen to begin a guest session.At that time, the custom launcher starts the system launcher and then exits.OEMs can alter the custom launcher to additionally launch another service oractivity on exit. See the Implementation section for details.

In order to maintain the integrity of retail mode, keyguard is disabled andcertain actions from Quick Settings that could adversely affect retail mode arealso disallowed, including:

• Airplane mode toggle
• Removing or modifying Wi-Fi access points (Settings)
• Changing carrier (Settings)
• Configuring hotspot (Settings)
• User switching

Additionally, access is also blocked to some global settings that can affectretail mode by disabling:

• Wi-Fi settings
• Cellular network configuration options, particularly hotspots
• Bluetooth configuration
• Backup & Reset, Date & Time, and Mobile Networks (they do not show up atall)

If the user is idle for some period of time (90 seconds by default), retail modewill show a system dialog to prompt the user to either exit the session orcontinue. If the user chooses to exit or if there's no response for fiveseconds, retail mode kills/wipes the current demo user, switches to a new demouser, and loops through the original video again. If someone turns off thescreen using the power button, it comes back on automatically after a fewseconds.

After exiting a demo session, devices mute themselves and reset some globalsettings, including:

• Brightness
• Auto-rotation
• Flashlight
• Language
• Accessibility

Exiting retail mode

In order to exit retail mode, retail employees must factory reset the devicefrom the boot loader.

Examples and source

Find the custom launcher that plays a video in a loop within:

Implementation

Enabling RetailDemoModeService

Setup wizard sets a Global setting Global.DEVICE_DEMO_MODE=true toindicate that the device has entered retail mode. Upon seeing this setting,RetailDemoModeService creates and switches to demo user when user 0is started, enables the custom launcher specified in an overlay resource, anddisables SUW. System Server and SystemUI also use this flag to manage aspectsof retail mode.

Setting custom launcher orvideo player

An OEM specifies a custom launcher by overriding the framework resourceconfig_demoModeLauncherComponent specified in:/frameworks/base/core/res/res/config.xml

For example, with:

The retail demo DemoPlayer app located at/packages/apps/RetailDemo is the default custom launcher in theAndroid Open Source Project (AOSP). The app looks for a video in/data/preloads/demo/retail_demo.mp4 and plays it in a loop. Whenthe user touches the screen, the custom launcher disables its activitycomponent, which results in the default system launcher starting up.

The custom launcher must have its custom component marked as disabled by default so that itdoesn't show up in non-demo scenarios. In the demo scenario, System Serverenables the specified config_demoModeLauncherComponent whenstarting a new demo session.

Setup wizard also looks for the above video to provide an affordance to enterretail mode. SUW can be modified to look for some other OEM-specific sign thatretail mode is supported if the video is not a part of the demo.

If there are system A/B partitions, the system B partition must contain the demovideo at /preloads/demo. This gets copied to/data/preloads/demo on first boot.

To set retail mode-specific settings, use:Settings.Global.retail_demo_mode_constants. E.g.:user_inactivity_timeout_ms=90000,warning_dialog_timeout_ms=10000

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Note: 90000 milliseconds is the currenttimeout default but is configurable.

Finding sample images

This feature places sample photos in a special folder that is visible to anygallery app. The photos are available only in demo mode and cannot be modifiedby the demo user as they are in a protected directory.

Preventing Google accounts

Certain restrictions are set in the guest user, similar to manageddevice/profile policies that prevent apps and users from performing certainoperations. One of these restrictions is DISALLOW_MODIFY_ACCOUNTS.With this restriction, AccountManager and Settings do not allow the addition ofaccounts. Some Google apps react to this restriction and show an error message,and others will not prompt for an account (such as YouTube and Photos).

OEM apps should also check if DISALLOW_MODIFY_ACCOUNTS is set. But this is ageneral problem not unique to retail mode. It is likely already solved forenterprise use cases.

Customizing the system launcher

OEMs are free to choose their layout but should include apps that function wellon the home screen and hotseat.

Customizing built-in apps for retail demo mode

Built-in apps may have their experience for retail demo mode customized bycalling the API UserManager.isDemoUser() to see if the app islaunched in a demo environment.

Following demo video guidelines

Demonstration videos should be in portrait layout (or natural orientation of thedevice, if tablet) and can be any length greater than five seconds. Contentshould not result in burn-in, since it will be played 24/7 when on display.

Maintenance

Bringing the device out ofretail mode

This can be done only by factory resetting from the boot loader.

Auto-OTA of system software

By default, when retail mode is enabled, device policy is set to over-the-air(OTA) update automatically. Retail devices will download, reboot, and installthe update (respecting battery thresholds) without confirmation even if it ismarked as optional.

Caution:If using System A/B partitions for OTA, once an OTA is received, the devicecannot find original retail mode resources in the System B partition. So anysubsequent factory reset will result in an inability to go back into retailmode.

Updating demo video via the web

The RetailDemo app in /packages/apps/RetailDemo has the ability toupdate the demo video if there is network connectivity. The URL to download thevideo from can be configured by overriding the following string value in theRetailDemo app:

If different videos need to be used in different regions, then differentdownload URLs can be configured by using locale-specific string resourcesres/values-*/strings.xml. For example, if different videos need tobe used in the U.S. and the U.K., then corresponding download URLs can be placedin res/values-en-rUS/strings.xml andres/values-en-rGB/strings.xml, respectively.

In res/values-en-rUS/strings.xml:

And similarly in res/values-en-rGB/strings.xml:

This video will be downloaded at most once per every device reboot. When thevideo on the device is being played, RetailDemo app will check in the backgroundif the download URL is provided and the video at the URL is newer than the onebeing played.

If so, RetailDemo app will download this video and start playingit. Once this video is downloaded, the downloaded video will be used for playingin the demo sessions going forward. None of the checks happen again until afternext reboot.

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DOWNLOAD → Nokia Store APK for any Android device

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There are plenty of things that has been changed about Android with the Nokia X, the most noticeable being the user interface. The UI on Nokia X is heavily inspired from Windows phone by Microsoft, and it doesn’t surprises us much for the fact Nokia was recently acquired by Microsoft for $7.2 billion dollars.

Anyway, the launcher on the Nokia X looks very similar to the tiles UI on Windows phone devices. Thanks the XDA member, opssemnik for porting over the Nokia X launcher from system dump of the device to run on any Android device.

icon-download DOWNLOAD NOKIA X LAUNCHER

NOTE: You must have a custom recovery installed on your Android device to be able to install the Nokia X launcher.

Download the recovery flashable zip file given below and transfer it to a separate folder on your phone and remember the location.

NOKIA X LAUNCHER ZIP FILE

DOWNLOAD LINK File name: NokiaLauncher0.6.zip (620.83 KB)

Be sure to transfer the Nokia X Launcher zip file you downloaded above to your phone and remember the location of the files. You will need to flash it now on your device using either of ClockworkMod (CWM) or TWRP recovery.

We’ve got separate guides for CWM and TWRP recovery, so use the guide relevant to the recovery you have installed on your device.

GUIDE FOR FLASHING NOKIA X LAUNCHER IN CWM RECOVERY

Example video: If you haven’t used CWM recovery before to install a .zip file of a ROM or anything else, then we suggest you first watch a video of that to get familiar with the process. Click here to watch the video

1. Boot into recovery mode on your Android device. If you’re rooted, the easiest way to boot into recovery mode would be using the QuickBoot app.
2. Create a Nandroid Backup from recovery. It’s optional but very important to do, so that in case something goes wrong you can restore to current status easily. For making a Nandroid Backup, go to Backup And Restore » Backup.
3. Install the NokiaLauncher0.6.zip file:
   • Select Install zip » Choose zip from sdcard (or external sdcard, you know where your files are) » browse to the location where you saved the file and select the NokiaLauncher0.6.zip file.
4. Reboot your device. For this, go back to the main menu of recovery and select reboot system now.
5. Once your device is rebooted, press the home button and select ‘Launcher‘ from the list of launchers that shows up.

GUIDE FOR FLASHING NOKIA X LAUNCHER IN TWRP RECOVERY

1. Boot into recovery mode on your Android device. If you’re rooted, the easiest way to boot into recovery mode would be using the QuickBoot app.
2. Create a Nandroid Backup from recovery. It’s optional but very important to do, so that in case something goes wrong you can restore to current status easily. For making a Nandroid Backup, go to Backup » and select all check boxes and swipe on the Swipe to confirm option at the bottom of the screen to confirm backup.
3. Install the NokiaLauncher0.6.zip file:
   • Tap on Install » browse to the location where you saved the files and tap on the NokiaLauncher0.6.zip file. Now at the bottom of the screen, do a swipe on the Swipe to confirm flash option to begin flashing.
     
4. Reboot your device. Go back to the main menu of recovery and tap on Reboot » then, tap on System to reboot your phone.
5. Once your device is rebooted, press the home button and select ‘Launcher‘ from the list of launchers that shows up.

Enjoy!