Display Manager

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EMDK For Android - 7.6

Overview

The Display Manager (DisplayMgr) provides control of certain display-screen features on the device.

Main Functionality

  • Enable/disable:
    • Screen blanking
    • Secondary display (external monitor)
    • Display of on-screen Lock Override button
    • Resizable and moveable app windows
    • Resizable activity windows
    • Stay Awake mode
    • Screen shot usage
    • Adaptive brightness
    • Automatic screen rotation
  • Set the font size
  • Set the display size
  • Set the screen brightless level
  • Set the display screen timeout interval
  • Set the screen blanking:
    • Signal port
    • Signal polarity
    • Debounce delay
  • When auto-rotation is not used, lock orientation to:
    • Portrait (No rotation)
    • Landscape left (90 degrees)
    • Portrait inverted (180 degrees)
    • Landscape right (270 degrees)
  • When auto-rotation is used, allow orientations:
    • All (0, 90, 180, 270 degrees)
    • All except portrait inverted (180 degrees)

Auto-rotate On/Off

This is the On/Off switch for automatic screen rotation, which automatically rotates the display based on orientation of the device.

Parm Name: Autorotate

Option Name Description Note Requires
0 Do not change This value (or the absence of this parm from the XML) causes no change to the current behavior; any previously selected setting is retained.

MX: 10.1+

Android API: 27+

1 Turn On Enables the screen to rotate automatically when device orientation changes.

MX: 10.1+

Android API: 27+

2 Turn Off Disables automatic screen rotation; the display remains in its current orientation regardless of device movement.

MX: 10.1+

Android API: 27+

Allowed Orientations

Used to select which screen orientation(s) to allow when auto-rotation is enabled on the device. Selecting "All except portrait inverted (180 degrees)" (option 2) prevents the screen from flipping when momentarily pointing the device downward, for example, to scan a barcode below waist level.

Shown if: Auto Rotate is set to "Turn On"

Parm Name: AllowedOrientations

Option Name Description Note Requires
0 Do not change This value (or the absence of this parm from the XML) causes no change to current device behavior; any previously selected setting is retained.

OSX: 10.11+

MX: 10.5+

Android API: 29+

1 All (0, 90, 180, 270 degrees) Allows any screen orientation to be used when auto-rotation is enabled.

OSX: 10.11+

MX: 10.5+

Android API: 29+

2 All except portrait inverted (180 degrees) Prevents the screen from using the "upside-down portrait" orientation.

OSX: 10.11+

MX: 10.5+

Android API: 29+

Locked Orientation Positions

Used to select the orientation to lock in when auto-rotation is not used.

Shown if: Auto Rotate is set to "Turn Off"

Parm Name: LockedOrientation

Option Name Description Note Requires
86 Do not change This value (or the absence of this parm from the XML) causes no change to current device behavior; any previously selected setting is retained.

MX: 10.5+

Android API: 29+

0 Portrait (No rotation) Lock screen orientation in Portrait mode.

MX: 10.5+

Android API: 29+

1 Landscape left (90 degrees) Lock screen orientation in Landscape mode.

MX: 10.5+

Android API: 29+

2 Portrait inverted (180 degrees) Lock screen orientation in inverted-Portrait mode.

MX: 10.5+

Android API: 29+

3 Landscape right (270 degrees) Lock screen orientation in inverted-Landscape mode.

MX: 10.5+

Android API: 29+

Lock Override Button Enable/Disable

This is the On/Off switch for the on-screen Lock Override button, which (when enabled) allows the device user to override the screen orientation locked by the administrator or an app.

Shown if: Auto Rotate is set to "Turn Off"

Parm Name: LockOverrideButton

Option Name Description Note Requires
0 Do not change This value (or the absence of this parm from the XML) causes no change to current device behavior; any previously selected setting is retained.

OSX: 10.11+

MX: 10.5+

Android API: 29+

1 Enable Allows the Lock Override button to be shown on the device screen.

OSX: 10.11+

MX: 10.5+

Android API: 29+

2 Disable Prevents the Lock Override button from being shown on the device screen.

OSX: 10.11+

MX: 10.5+

Android API: 29+

Set Screen Timeout Interval

Used to set the length of time the device waits during periods of inactivity (without screen touches or key presses) before turning off the screen to conserve power. Ideally, this interval should represent a balance between battery preservation and user convenience.

Note: Android supports only the display-screen timeout settings shown in the table below. Entering a value between any two supported values changes the setting to the closest supported value. Entered values outside the minimum or maximum shown are ignored and trigger an error in the Result XML document.

Parm Name: TimeoutInterval

Option Name Description Note Requires
0 Do not change This value (or the absence of this parm from the XML) causes no change to the current display screen timeout interval; any previously selected setting is retained.

MX: 4.3+

Android API: 1+

15 15 seconds after Display Timeout Causes the display screen to timeout after 15 seconds of device-user inaction.

MX: 4.3+

Android API: 1+

30 30 seconds after Display Timeout Causes the display screen to timeout after 30 seconds of device-user inaction.

MX: 4.3+

Android API: 1+

60 1 minute after Display Timeout Causes the display screen to timeout after one minute of device-user inaction.

MX: 4.3+

Android API: 1+

120 2 minutes after Display Timeout Causes the display screen to timeout after two minutes of device-user inaction.

MX: 4.3+

Android API: 1+

300 5 minutes after Display Timeout Causes the display screen to timeout after five minutes of device-user inaction.

MX: 4.3+

Android API: 1+

600 10 minutes after Display Timeout Causes the display screen to timeout after 10 minutes of device-user inaction.

MX: 4.3+

Android API: 1+

1800 30 minutes after Display Timeout Causes the display screen to timeout after 30 minutes of device-user inaction.

MX: 4.3+

Android API: 1+

65535 Never Keeps the display screen on at all times despite any period of device-user inaction.

MX: 9.2+

Stay Awake Enable/Disable

Controls whether a device enters suspend (sleep) mode based on its connection to an external power source. Device otherwise operates according to settings in the Developer Options section of the Android Settings panel. Note: This feature is enabled by default on Zebra VC80x vehicle computers.

Parm Name: StayAwake

Option Name Description Note Requires
0 Do Nothing This value (or the absence of this parm from the XML) will cause no change to the current behavior; any previously selected setting will be retained.

MX: 7.2+

Android API: 17+

1 Enable Prevents the device from entering suspend (sleep) mode when it is connected to an external power source.

MX: 7.2+

Android API: 17+

2 Disable Allows the device to enter suspend (sleep) mode regardless of its connection to an external power source.

MX: 7.2+

Android API: 17+

Secondary Display Mode

Used to control whether content displayed on an external monitor, when connected, mirrors the device or is independent of the device.

Parm Name: SecondaryDisplayMode

Option Name Description Note Requires
0 Do not change This value (or the absence of this parm from the XML) causes no change to the current behavior; any previously selected setting is retained.

MX: 10.5+

Android API: 29+

1 Present Independent Desktop Content presented on an external monitor is independent of content on device.

MX: 10.5+

Android API: 29+

2 Mirror Device Screen Content presented on an external monitor is the same as content on device.

MX: 10.5+

Android API: 29+

Remote Control

Used to select which display to use for Media Projection and Key and Touch Injection operations when running an app to remotely control the device or perform similar activities.

Parm Name: AllowedOrientations

Option Name Description Note Requires
86 Do not change This value (or the absence of this parm from the XML) causes no change to current device behavior; any previously selected setting is retained.

MX: 10.5+

Android API: 30+

0 Primary (Mobile) Display Uses the built-in device screen for Media Projection and Key and Touch Injection operations.

MX: 10.5+

Android API: 30+

1 Secondary (Desktop) Display Uses the external display for Media Projection and Key and Touch Injection operations. When this option is selected, attempts to perform Media Projection and KTI operations when the device is NOT connected to an external monitor result in an error.

MX: 10.5+

Android API: 30+

Resizable Windows On/Off

Used to control whether applications run in windows that can be resized and/or moved by the device user. When turned off (option 2), apps launch in windows of fixed size and position, regardless of settings in the app's manifest.

Shown if: Secondary Display Mode is "Mirror Device Screen"

Parm Name: ResizableWindows

Option Name Description Note Requires
0 Do not change This value (or the absence of this parm from the XML) causes no change to the current behavior; any previously selected setting is retained.

MX: 10.5+

Android API: 29+

1 Turn On Runs apps in windows that can be resized and/or moved.

MX: 10.5+

Android API: 29+

2 Turn Off Runs apps in windows that cannot be resized or moved, regardless of settings in the app's manifest.

MX: 10.5+

Android API: 29+

Activity Resizability

Used to control whether app activities are forced to run in windows that can be resized and/or moved by the device user or should follow the app manifest.

Parm Name: ActivityResizability

Option Name Description Note Requires
0 Do not change This value (or the absence of this parm from the XML) causes no change to the current behavior; any previously selected setting is retained.

MX: 10.5+

Android API: 29+

1 All activities resizable Allows all app activities to run in windows that can be resized and/or moved.

MX: 10.5+

Android API: 29+

2 Follow app manifest Allows all app activities to run in resizable or fixed windows as prescribed in the app's manifest.

MX: 10.5+

Android API: 29+

Adaptive Brightness On/Off

This is the On/Off switch for Adaptive Brightness on the device, which automatically adjusts screen brightness based on input from the ambient light sensor.

Parm Name: Adaptivebrightness

Option Name Description Note Requires
0 Do not change This value (or the absence of this parm from the XML) causes no change to the current behavior; any previously selected setting is retained.

MX: 10.2+

Android API: 27+

1 Turn On Enables the device to automatically adapt screen brightness based on ambient light.

MX: 10.2+

Android API: 27+

2 Turn Off Prevents the device from automatically adapting screen brightness.

MX: 10.2+

Android API: 27+

Brightness Level

Used to enter the screen backlight brightness level (from 0-100) as a percentage of the maximum. Enter -1 to leave current device setting unchanged. On devices running Android 9.x Pie and later, which support setting brightness while Adaptive Brightness is On, input from the ambient light sensor causes this setting to change. To prevent automatic changes, set Adaptive Brightness to Off.

Parm value input rules:

  • Accepts an integer from -1–100
  • If no value is entered, default value of -1 is used

Parm Name: Brightnesslevel

Requires:

  • MX: 10.2+
  • Android API: 27+

Font Size

Used to select the size of alpha-numeric characters appearing in UI elements displayed on the device screen.

Parm Name: FontSize

Option Name Description Note Requires
0 Do Nothing This value (or the absence of this parm from the XML) causes no change to the current behavior; any previously selected setting is retained.

MX: 9.2+

0.85 Small Sets the font to one size smaller than the Android default size.

MX: 9.2+

1 Default Sets the font to the Android default size.

MX: 9.2+

1.15 Large Sets the font to one size larger than the Android default size.

MX: 9.2+

1.3 Largest Sets the font to two sizes larger than the Android default size.

MX: 9.2+

Display Size

Used to select the size of UI elements displayed on the device. NOTE: The "Larger" and "Largest" settings apply only to larger screens such as those of tablets and vehicle computers.

Parm Name: DisplaySize

Option Name Description Note Requires
0 Do Nothing This value (or the absence of this parm from the XML) causes no change to the current behavior; any previously selected setting is retained.

MX: 9.2+

Android API: 27+

SMALL Small Sets the size of UI elements at one step smaller than Android default size.

MX: 9.2+

Android API: 27+

DEFAULT Default Sets the Android default size for UI elements.

MX: 9.2+

Android API: 27+

LARGE Large Sets the size of UI elements at one step larger than Android default size.

MX: 9.2+

Android API: 27+

LARGER Larger Sets the size of UI elements at two steps larger than Android default size (large screens only).

MX: 9.2+

Android API: 27+

LARGEST Largest Sets the size of UI elements at three steps larger than Android default size (large screens only).

MX: 9.2+

Android API: 27+

Screen Shot Enable/Disable

Controls whether a device can use Android's built-in screen capture capability, which captures the contents of the screen and saves it to a file on the device.

Note: The method of capturing the screen generally involves a combination of simultaneous key presses that varies from one device to another.

Parm Name: ScreenShotUsage

Option Name Description Note Requires
0 Do Nothing This value (or the absence of this parm from the XML) causes no change to the current behavior; any previously selected setting is retained.

OSX: 3.6,4.5 ONLY

NOT IN OSX 4.0 - 4.4

MX: 5.0+

1 Enable Enables the ability to use the Android screen capture feature.

OSX: 3.6,4.5 ONLY

NOT IN OSX 4.0 - 4.4

MX: 5.0+

2 Disable Disables the ability to use the Android screen capture feature.

OSX: 3.6,4.5 ONLY

NOT IN OSX 4.0 - 4.4

MX: 5.0+

Screen Blanking Enable/Disable

Controls whether a device display can be made blank when triggered by the signal set in the Screen Blanking Signal parameter. Blanking the screen blocks all user interaction with the device and its apps.

This feature was developed for safety reasons and is intended for use with vehicle-mount computers while the vehicle is in motion. It can be activated, for example, by an electrical signal wired to the vehicle accelerator. For more information about connecting a Zebra device to vehicle wiring, please refer to the Integrator Guide that accommpanied the unit.

Parm Name: ScreenBlanking

Option Name Description Note Requires
0 Do Nothing This value (or the absence of this parm from the XML) will cause no change to the current behavior; any previously selected setting will be retained.

MX: 7.1+

1 Never blanked Prevents blanking of the screen.

MX: 7.1+

2 When Triggered by Signal Enables the screen to be blanked when triggered by a signal external to the device.

MX: 7.1+

Set Blanking Debounce Delay

Used to enter a delay (in ms) after a signal change is detected before blanking or unblanking the screen. Default value is 1000 ms (one second).

Parm value input rules:

  • Accepts an integer from 250-32767
  • If no value is entered, default value of 1000 is used

Shown if: Screen Blanking is set to "When Triggered by Signal"

Parm Name: ScreenBlankingDebounceDelay

Requires:

  • MX: 7.1+

Set Screen Blanking Signal

Used to enter which external signal will control Screen Blanking, if enabled. Inputs 1 and 2 correspond to serial ports 1 and 2 on the Zebra VC80x vehicle-mounted computer. Other devices might differ. The serial port can be used to determine whether the vehicle’s accelerator pedal is pressed. For more information about connecting a Zebra device to vehicle wiring, please refer to the Integrator Guide that accommpanied the unit.

Shown if: Screen Blanking is set to "When Triggered by Signal"

Parm Name: ScreenBlankingSignal

Option Name Description Note Requires
1 Input 1 Sets the screen blanking signal to Input 1 (VC80x serial port 1).

MX: 7.1+

2 Input 2 Sets the screen blanking signal to Input 2 (VC80x serial port 2).

MX: 7.1+

Set Blanking Signal Polarity

Controls whether to blank the screen when the signal designated in the Screen Blank Signal parameter is present or absent.

Shown if: Screen Blanking is set to "When Triggered by Signal"

Parm Name: ScreenBlankingSignalPolarity

Option Name Description Note Requires
1 Blank screen when vehicle goes active (ON) Sets the screen to go blank when a signal is present.

MX: 7.1+

2 Blank screen when vehicle goes inactive (OFF) Sets the screen to go blank when a signal is absent.

MX: 7.1+

Examples

Turn On Screen Blanking

The sample below turns on the screen-blanking feature, selects serial port 1 on the Zebra VC80x vehicle-mounted computer as the signal port with standard-polarity wiring, and sets a two second (2000 ms) delay.

<wap-provisioningdoc>
    <characteristic type="DisplayMgr">
        <parm name="ScreenBlanking" value="2" />
        <characteristic type="screen-blanking-details">
            <parm name="ScreenBlankingSignal" value="1" />
            <parm name="ScreenBlankingPolarity" value="1" />
            <parm name="ScreenBlankingDebounceDelay" value="2000" />
        </characteristic>
    </characteristic>
</wap-provisioningdoc>

Turn Off Screen Blanking

<wap-provisioningdoc>
    <characteristic type="DisplayMgr">
        <parm name="ScreenBlanking" value="1" />
    </characteristic>
</wap-provisioningdoc>

Turn off the stay-awake feature

<wap-provisioningdoc>
    ​<characteristic type="DisplayMgr">
        ​​<parm name="StayAwake" value="2" />
    ​</characteristic>
</wap-provisioningdoc>

Setting font size to large (1.15)

<wap-provisioningdoc>
    <characteristic type=”DisplayMgr”>
        <parm name=”FontSize” value=”1.15” />
    </characteristic>
</wap-provisioningdoc>

Setting display size to large

<wap-provisioningdoc>
    <characteristic type=”DisplayMgr”>
        <parm name=”DisplaySize” value=”LARGE” />
    </characteristic>
</wap-provisioningdoc>

Turn on Auto Rotate Feature

<wap-provisioningdoc>
    <characteristic type=”DisplayMgr”>
        <parm name=”Autorotate” value=”1” />
    </characteristic>
</wap-provisioningdoc>

Turn on adaptive brightness

<wap-provisioningdoc>
    <characteristic type=”DisplayMgr”>
        <parm name=” Adaptivebrightness” value=”1” />
    </characteristic>
</wap-provisioningdoc>

Setting screen brightness level to 80 percent

<wap-provisioningdoc>
    <characteristic type=”DisplayMgr”>
        <parm name=” Brightnesslevel” value=”80” />
    </characteristic>
</wap-provisioningdoc>