DisplayManager

BRIGHTNESS_UNIT_PERCENTAGE

 public static final int BRIGHTNESS_UNIT_PERCENTAGE

Brightness value type where the value is in the range [0, 100] and when set, the brightness UI slider will show the same value. It gets converted from the user-perception scale to the power scale and mapped to the current brightness range. The current brightness range may change over time depending on the device state (such as the brightness of the ambient environment). When this type of used, 0 and 100 map to the current brightness minimum and maximum respectively.

Constant Value: 1 (0x00000001)

DISPLAY_CATEGORY_BUILT_IN_DISPLAYS

 public static final String DISPLAY_CATEGORY_BUILT_IN_DISPLAYS

Display category: Built in displays.

This category can be used to identify displays that are built into the device. The displays that are returned may be inactive or disabled at the current moment. The returned displays are useful in identifying the various sizes of built-in displays. The id from Display.getDisplayId() is not guaranteed to be stable and may change when the display becomes active.

Constant Value: "android.hardware.display.category.BUILT_IN_DISPLAYS"

DISPLAY_CATEGORY_PRESENTATION

 public static final String DISPLAY_CATEGORY_PRESENTATION

Display category: Presentation displays.

This category can be used to identify secondary displays that are suitable for use as presentation displays such as external or wireless displays. Applications may automatically project their content to presentation displays to provide richer second screen experiences.

Constant Value: "android.hardware.display.category.PRESENTATION"

EVENT_TYPE_DISPLAY_ADDED

 public static final long EVENT_TYPE_DISPLAY_ADDED

Event type for when a new display is added. This notification is sent through the DisplayListener.onDisplayAdded callback method

Constant Value: 1 (0x0000000000000001)

EVENT_TYPE_DISPLAY_BRIGHTNESS

 public static final long EVENT_TYPE_DISPLAY_BRIGHTNESS

Event type to register for a display's brightness changes. This notification is sent through the DisplayListener.onDisplayChanged callback method. New brightness values can be retrieved via ERROR(/android.view.Display#getBrightnessInfo()).

Constant Value: 32 (0x0000000000000020)

EVENT_TYPE_DISPLAY_CHANGED

 public static final long EVENT_TYPE_DISPLAY_CHANGED

Event type for when a display is changed. DisplayListener.onDisplayChanged callback is triggered whenever the properties of a Display, such as size, state, density are modified. This event is not triggered for refresh rate changes as they can change very often. To monitor refresh rate changes, subscribe to ERROR(/EVENT_TYPE_DISPLAY_REFRESH_RATE).

Constant Value: 4 (0x0000000000000004)

EVENT_TYPE_DISPLAY_REFRESH_RATE

 public static final long EVENT_TYPE_DISPLAY_REFRESH_RATE

Event type for when a display's refresh rate changes. DisplayListener.onDisplayChanged callback is triggered whenever the refresh rate of the display changes. New refresh rate values can be retrieved via Display.getRefreshRate().

Constant Value: 8 (0x0000000000000008)

EVENT_TYPE_DISPLAY_REMOVED

 public static final long EVENT_TYPE_DISPLAY_REMOVED

Event type for when a display is removed. This notification is sent through the DisplayListener.onDisplayRemoved callback method

Constant Value: 2 (0x0000000000000002)

EVENT_TYPE_DISPLAY_STATE

 public static final long EVENT_TYPE_DISPLAY_STATE

Event type for when a display state changes. DisplayListener.onDisplayChanged callback is triggered whenever the state of the display changes. New state values can be retrieved via Display.getState().

Constant Value: 16 (0x0000000000000010)

MATCH_CONTENT_FRAMERATE_ALWAYS

 public static final int MATCH_CONTENT_FRAMERATE_ALWAYS

Refresh rate switches between all refresh rates are allowed even if they have visual interruptions for the user.

Constant Value: 2 (0x00000002)

MATCH_CONTENT_FRAMERATE_NEVER

 public static final int MATCH_CONTENT_FRAMERATE_NEVER

No mode switching is allowed.

Constant Value: 0 (0x00000000)

MATCH_CONTENT_FRAMERATE_SEAMLESSS_ONLY

 public static final int MATCH_CONTENT_FRAMERATE_SEAMLESSS_ONLY

Only refresh rate switches without visual interruptions are allowed.

Constant Value: 1 (0x00000001)

MATCH_CONTENT_FRAMERATE_UNKNOWN

 public static final int MATCH_CONTENT_FRAMERATE_UNKNOWN

Match content frame rate user preference is unknown.

Constant Value: -1 (0xffffffff)

VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR

 public static final int VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR

Virtual display flag: Allows content to be mirrored on private displays when no content is being shown.

This flag is mutually exclusive with VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY. If both flags are specified then the own-content only behavior will be applied.

The behavior of this flag is implied whenever VIRTUAL_DISPLAY_FLAG_PUBLIC is set and VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY has not been set. This flag is only required to override the default behavior when creating a private display.

Creating an auto-mirroing virtual display requires the CAPTURE_VIDEO_OUTPUT or CAPTURE_SECURE_VIDEO_OUTPUT permission. These permissions are reserved for use by system components and are not available to third-party applications. Alternatively, an appropriate MediaProjection may be used to create an auto-mirroring virtual display.

Constant Value: 16 (0x00000010)

VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY

 public static final int VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY

Virtual display flag: Only show this display's own content; do not mirror the content of another display.

This flag is used in conjunction with VIRTUAL_DISPLAY_FLAG_PUBLIC. Ordinarily public virtual displays will automatically mirror the content of the default display if they have no windows of their own. When this flag is specified, the virtual display will only ever show its own content and will be blanked instead if it has no windows.

This flag is mutually exclusive with VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR. If both flags are specified then the own-content only behavior will be applied.

This behavior of this flag is implied whenever neither VIRTUAL_DISPLAY_FLAG_PUBLIC nor VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR have been set. This flag is only required to override the default behavior when creating a public display.

Constant Value: 8 (0x00000008)

VIRTUAL_DISPLAY_FLAG_PRESENTATION

 public static final int VIRTUAL_DISPLAY_FLAG_PRESENTATION

Virtual display flag: Create a presentation display.

Presentation virtual displays

When this flag is set, the virtual display is registered as a presentation display in the presentation display category. Applications may automatically project their content to presentation displays to provide richer second screen experiences.

Non-presentation virtual displays

When this flag is not set, the virtual display is not registered as a presentation display. Applications can still project their content on the display but they will typically not do so automatically. This option is appropriate for more special-purpose displays.

Constant Value: 2 (0x00000002)

VIRTUAL_DISPLAY_FLAG_PUBLIC

 public static final int VIRTUAL_DISPLAY_FLAG_PUBLIC

Virtual display flag: Create a public display.

Public virtual displays

When this flag is set, the virtual display is public.

A public virtual display behaves just like most any other display that is connected to the system such as an external or wireless display. Applications can open windows on the display and the system may mirror the contents of other displays onto it.

Creating a public virtual display that isn't restricted to own-content only implicitly creates an auto-mirroring display. See VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR for restrictions on who is allowed to create an auto-mirroring display.

Private virtual displays

When this flag is not set, the virtual display is private as defined by the Display.FLAG_PRIVATE display flag.

A private virtual display belongs to the application that created it. Only the a owner of a private virtual display and the apps that are already on that display are allowed to place windows upon it. The private virtual display also does not participate in display mirroring: it will neither receive mirrored content from another display nor allow its own content to be mirrored elsewhere. More precisely, the only processes that are allowed to enumerate or interact with the private display are those that have the same UID as the application that originally created the private virtual display or as the activities that are already on that display.

Constant Value: 1 (0x00000001)

VIRTUAL_DISPLAY_FLAG_SECURE

 public static final int VIRTUAL_DISPLAY_FLAG_SECURE

Virtual display flag: Create a secure display.

Secure virtual displays

When this flag is set, the virtual display is considered secure as defined by the Display.FLAG_SECURE display flag. The caller promises to take reasonable measures, such as over-the-air encryption, to prevent the contents of the display from being intercepted or recorded on a persistent medium.

Creating a secure virtual display requires the CAPTURE_SECURE_VIDEO_OUTPUT permission. This permission is reserved for use by system components and is not available to third-party applications.

Non-secure virtual displays

When this flag is not set, the virtual display is considered unsecure. The content of secure windows will be blanked if shown on this display.

Constant Value: 4 (0x00000004)

createVirtualDisplay

 public VirtualDisplay createVirtualDisplay (VirtualDisplayConfig config)

Creates a virtual display.

createVirtualDisplay

 public VirtualDisplay createVirtualDisplay (String name,                  int width,                  int height,                  int densityDpi,                  Surface surface,                  int flags)

Creates a virtual display.

createVirtualDisplay

 public VirtualDisplay createVirtualDisplay (String name,                  int width,                  int height,                  int densityDpi,                  Surface surface,                  int flags,                  VirtualDisplay.Callback callback,                  Handler handler)

Creates a virtual display.

The content of a virtual display is rendered to a Surface provided by the application.

The virtual display should be released when no longer needed. Because a virtual display renders to a surface provided by the application, it will be released automatically when the process terminates and all remaining windows on it will be forcibly removed.

The behavior of the virtual display depends on the flags that are provided to this method. By default, virtual displays are created to be private, non-presentation and unsecure. Permissions may be required to use certain flags.

As of Build.VERSION_CODES.KITKAT_WATCH, the surface may be attached or detached dynamically using VirtualDisplay.setSurface. Previously, the surface had to be non-null when createVirtualDisplay(VirtualDisplayConfig) was called and could not be changed for the lifetime of the display.

Detaching the surface that backs a virtual display has a similar effect to turning off the screen.

createVirtualDisplay

 public VirtualDisplay createVirtualDisplay (VirtualDisplayConfig config,                  Handler handler,                  VirtualDisplay.Callback callback)

Creates a virtual display.

The content of a virtual display is rendered to a Surface provided by the application.

The virtual display should be released when no longer needed. Because a virtual display renders to a surface provided by the application, it will be released automatically when the process terminates and all remaining windows on it will be forcibly removed.

The behavior of the virtual display depends on the flags that are provided to this method. By default, virtual displays are created to be private, non-presentation and unsecure. Permissions may be required to use certain flags.

As of Build.VERSION_CODES.KITKAT_WATCH, the surface may be attached or detached dynamically using VirtualDisplay.setSurface. Previously, the surface had to be non-null when createVirtualDisplay(VirtualDisplayConfig) was called and could not be changed for the lifetime of the display.

Detaching the surface that backs a virtual display has a similar effect to turning off the screen.

getBrightness

 public float getBrightness (int displayId,                  int unit)

Gets the brightness of the specified display in the specified brightness unit.

getDisplay

 public Display getDisplay (int displayId)

Gets information about a logical display. The display metrics may be adjusted to provide compatibility for legacy applications.

getDisplayTopology

 public DisplayTopology getDisplayTopology ()

getDisplays

 public Display[] getDisplays (String category)

Gets all currently valid logical displays of the specified category.

When there are multiple displays in a category the returned displays are sorted of preference. For example, if the requested category is DISPLAY_CATEGORY_PRESENTATION and there are multiple presentation displays then the displays are sorted so that the first display in the returned array is the most preferred presentation display. The application may simply use the first display or allow the user to choose.

getDisplays

 public Display[] getDisplays ()

Gets all currently valid logical displays.

getHdrConversionMode

 public HdrConversionMode getHdrConversionMode ()

Returns the HdrConversionMode of the device, which is set by the user. When HdrConversionMode.getConversionMode is HdrConversionMode.HDR_CONVERSION_SYSTEM, the HdrConversionMode.getPreferredHdrOutputType depicts the systemPreferredHdrOutputType. The HDR conversion mode chosen by user which considers the app override is returned. Apps can override HDR conversion using WindowManager.LayoutParams.setHdrConversionEnabled(boolean).

getMatchContentFrameRateUserPreference

 public int getMatchContentFrameRateUserPreference ()

Returns the user preference for "Match content frame rate".

Never: Even if the app requests it, the device will never try to match its output to the original frame rate of the content.

Seamless: If the app requests it, the device will match its output to the original frame rate of the content, ONLY if the display can transition seamlessly.

Always: If the app requests it, the device will match its output to the original frame rate of the content. This may cause the screen to go blank for a second when exiting or entering a video playback.

registerDisplayListener

 public void registerDisplayListener (Executor executor,                  long eventFilter,                  DisplayManager.DisplayListener listener)

Registers a display listener to receive notifications about given display event types.

registerDisplayListener

 public void registerDisplayListener (DisplayManager.DisplayListener listener,                  Handler handler)

Registers a display listener to receive notifications about when displays are added, removed or changed. Because of the high frequency at which the refresh rate can change, clients will be registered for refresh rate change callbacks only when they request for refresh rate data(Display.getRefreshRate(). Or alternately, you can consider using registerDisplayListener(java.util.concurrent.Executor, long, android.hardware.display.DisplayManager.DisplayListener) and explicitly subscribe to EVENT_TYPE_DISPLAY_REFRESH_RATE event We encourage to use registerDisplayListener(java.util.concurrent.Executor, long, android.hardware.display.DisplayManager.DisplayListener) instead to subscribe for explicit events of interest

registerTopologyListener

 public void registerTopologyListener (Executor executor,                  Consumer<DisplayTopology> listener)

Register a listener to receive display topology updates.

setBrightness

 public void setBrightness (int displayId,                  float value,                  int unit)

Sets the brightness of the specified display. Accepts different brightness units.
Requires Manifest.permission.WRITE_SETTINGS

unregisterDisplayListener

 public void unregisterDisplayListener (DisplayManager.DisplayListener listener)

Unregisters a display listener.

unregisterTopologyListener

 public void unregisterTopologyListener (Consumer<DisplayTopology> listener)

Unregister a display topology listener.