DEFAULT_DISPLAY

public static final int DEFAULT_DISPLAY

The default Display id, which is the id of the primary display assuming there is one.

Constant Value: 0 (0x00000000)

FLAG_PRESENTATION

public static final int FLAG_PRESENTATION

Display flag: Indicates that the display is a presentation display.

This flag identifies 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: 8 (0x00000008)

FLAG_PRIVATE

public static final int FLAG_PRIVATE

Display flag: Indicates that the display is private. Only the application that owns the display and apps that are already on the display can create windows on it.

Constant Value: 4 (0x00000004)

FLAG_ROUND

public static final int FLAG_ROUND

Display flag: Indicates that the display has a round shape.

This flag identifies displays that are circular, elliptical or otherwise do not permit the user to see all the way to the logical corners of the display.

Constant Value: 16 (0x00000010)

FLAG_SECURE

public static final int FLAG_SECURE

Display flag: Indicates that the display has a secure video output and supports compositing secure surfaces.

If this flag is set then the display device has a secure video output and is capable of showing secure surfaces. It may also be capable of showing protected buffers.

If this flag is not set then the display device may not have a secure video output; the user may see a blank region on the screen instead of the contents of secure surfaces or protected buffers.

Secure surfaces are used to prevent content rendered into those surfaces by applications from appearing in screenshots or from being viewed on non-secure displays. Protected buffers are used by secure video decoders for a similar purpose.

An application creates a window with a secure surface by specifying the WindowManager.LayoutParams.FLAG_SECURE window flag. Likewise, an application creates a SurfaceView with a secure surface by calling SurfaceView.setSecure before attaching the secure view to its containing window.

An application can use the absence of this flag as a hint that it should not create secure surfaces or protected buffers on this display because the content may not be visible. For example, if the flag is not set then the application may choose not to show content on this display, show an informative error message, select an alternate content stream or adopt a different strategy for decoding content that does not rely on secure surfaces or protected buffers.

Constant Value: 2 (0x00000002)

FLAG_SUPPORTS_PROTECTED_BUFFERS

public static final int FLAG_SUPPORTS_PROTECTED_BUFFERS

Display flag: Indicates that the display supports compositing content that is stored in protected graphics buffers.

If this flag is set then the display device supports compositing protected buffers.

If this flag is not set then the display device may not support compositing protected buffers; the user may see a blank region on the screen instead of the protected content.

Secure (DRM) video decoders may allocate protected graphics buffers to request that a hardware-protected path be provided between the video decoder and the external display sink. If a hardware-protected path is not available, then content stored in protected graphics buffers may not be composited.

An application can use the absence of this flag as a hint that it should not use protected buffers for this display because the content may not be visible. For example, if the flag is not set then the application may choose not to show content on this display, show an informative error message, select an alternate content stream or adopt a different strategy for decoding content that does not rely on protected buffers.

Constant Value: 1 (0x00000001)

FRAME_RATE_CATEGORY_HIGH

public static final int FRAME_RATE_CATEGORY_HIGH

High category determines the framework's recommended high frame rate. Opt for this high rate when a higher frame rate significantly enhances the user experience.

Constant Value: 1 (0x00000001)

FRAME_RATE_CATEGORY_NORMAL

public static final int FRAME_RATE_CATEGORY_NORMAL

Normal category determines the framework's recommended normal frame rate. Opt for this normal rate unless a higher frame rate significantly enhances the user experience.

Constant Value: 0 (0x00000000)

INVALID_DISPLAY

public static final int INVALID_DISPLAY

Invalid display id.

Constant Value: -1 (0xffffffff)

STATE_DOZE

public static final int STATE_DOZE

Display state: The display is dozing in a low power state; it is still on but is optimized for showing system-provided content while the device is non-interactive.

Constant Value: 3 (0x00000003)

STATE_DOZE_SUSPEND

public static final int STATE_DOZE_SUSPEND

Display state: The display is dozing in a suspended low power state; it is still on but the CPU is not updating it. This may be used in one of two ways: to show static system-provided content while the device is non-interactive, or to allow a "Sidekick" compute resource to update the display. For this reason, the CPU must not control the display in this mode.

Constant Value: 4 (0x00000004)

STATE_OFF

public static final int STATE_OFF

Display state: The display is off.

Constant Value: 1 (0x00000001)

STATE_ON

public static final int STATE_ON

Display state: The display is on.

Constant Value: 2 (0x00000002)

STATE_ON_SUSPEND

public static final int STATE_ON_SUSPEND

Display state: The display is in a suspended full power state; it is still on but the CPU is not updating it. This may be used in one of two ways: to show static system-provided content while the device is non-interactive, or to allow a "Sidekick" compute resource to update the display. For this reason, the CPU must not control the display in this mode.

Constant Value: 6 (0x00000006)

STATE_UNKNOWN

public static final int STATE_UNKNOWN

Display state: The display state is unknown.

Constant Value: 0 (0x00000000)

STATE_VR

public static final int STATE_VR

Display state: The display is on and optimized for VR mode.

Constant Value: 5 (0x00000005)

getAppVsyncOffsetNanos

public long getAppVsyncOffsetNanos ()

Gets the app VSYNC offset, in nanoseconds. This is a positive value indicating the phase offset of the VSYNC events provided by Choreographer relative to the display refresh. For example, if Choreographer reports that the refresh occurred at time N, it actually occurred at (N - appVsyncOffset).

Apps generally do not need to be aware of this. It's only useful for fine-grained A/V synchronization.

getCurrentSizeRange

public void getCurrentSizeRange (Point outSmallestSize, 
                Point outLargestSize)

Return the range of display sizes an application can expect to encounter under normal operation, as long as there is no physical change in screen size. This is basically the sizes you will see as the orientation changes, taking into account whatever screen decoration there is in each rotation. For example, the status bar is always at the top of the screen, so it will reduce the height both in landscape and portrait, and the smallest height returned here will be the smaller of the two. This is intended for applications to get an idea of the range of sizes they will encounter while going through device rotations, to provide a stable UI through rotation. The sizes here take into account all standard system decorations that reduce the size actually available to the application: the status bar, navigation bar, system bar, etc. It does not take into account more transient elements like an IME soft keyboard.

getDeviceProductInfo

public DeviceProductInfo getDeviceProductInfo ()

Returns the product-specific information about the display or the directly connected device on the display chain. For example, if the display is transitively connected, this field may contain product information about the intermediate device. Returns null if product information is not available.

getDisplayId

public int getDisplayId ()

Gets the display id.

Each logical display has a unique id. The default display has id DEFAULT_DISPLAY.

getFlags

public int getFlags ()

Returns a combination of flags that describe the capabilities of the display.

getFrameRateVelocityMapping

public List<FrameRateVelocityPoint> getFrameRateVelocityMapping ()

Retrieves the View frame rate / velocity mapping specifications defined in the framework configuration. For example, 120 frame per second / 300 dp (density-independent pixels) per second

This is primarily for flinging use cases in components like RecyclerView, ScrollView, AbsListView, and NestedScrollView. When the content's velocity is high, a higher frame rate is required to ensure smoothness, and conversely, a lower frame rate can be used when the velocity is low.

These values are specific to this Display instance. If your application moves to a different display (for example, transitioning between the inner and outer screens of a foldable device), you must query these values from the Display object associated with the window where the content is currently being rendered.

Mapping values needs to be re-queried whenever DisplayListener#onDisplayChanged is invoked to ensure data consistency. This corresponds to the DisplayManager#EVENT_FLAG_DISPLAY_CHANGED event.

getHdrSdrRatio

public float getHdrSdrRatio ()

getHeight

public int getHeight ()

This method was deprecated in API level 15.
Use height from WindowMetrics.getBounds() instead.

getHighestHdrSdrRatio

public float getHighestHdrSdrRatio ()

getMetrics

public void getMetrics (DisplayMetrics outMetrics)

This method was deprecated in API level 30.
Use WindowMetrics.getBounds() to get the dimensions of the application window. Use WindowMetrics.getDensity() to get the density of the application window.

Gets the size and density of this display.

The size returned does not necessarily represent the actual size (native resolution) of the display. The returned size might be adjusted to exclude certain system decor elements that are always visible, or the size might be scaled to provide compatibility with older applications that were originally designed for smaller displays.

The returned size can also be different depending on the WindowManager associated with the display:

• If metrics are requested from an activity (either using a WindowManager accessed by getWindowManager() or getSystemService(Context.WINDOW_SERVICE)), the returned metrics provide the size of the current app window. As a result, in multi-window mode, the returned size can be smaller than the size of the device screen. System decoration handling may vary depending on API level:
  • API level 35 and above, the window size will be returned.
  • API level 34 and below, the window size minus system decoration areas and display cutout is returned.
• If metrics are requested from a non-activity context (for example, the application context, where the WindowManager is accessed by getApplicationContext().getSystemService(Context.WINDOW_SERVICE)), the returned size can vary depending on API level:
  • API level 29 and below — The returned metrics provide the size of the entire display (based on current rotation) minus system decoration areas.
  • API level 30 and above — The returned metrics provide the size of the top running activity in the current process. If the current process has no running activities, the metrics provide the size of the default display of the device, including system decoration areas.

getName

public String getName ()

Gets the name of the display.

Note that some displays may be renamed by the user.

getPixelFormat

public int getPixelFormat ()

This method was deprecated in API level 17.
This method is no longer supported. The result is always PixelFormat.RGBA_8888.

Gets the pixel format of the display.

getPreferredWideGamutColorSpace

public ColorSpace getPreferredWideGamutColorSpace ()

Returns the preferred wide color space of the Display. The returned wide gamut color space is based on hardware capability and is preferred by the composition pipeline. Returns null if the display doesn't support wide color gamut. Display.isWideColorGamut().

getRealMetrics

public void getRealMetrics (DisplayMetrics outMetrics)

This method was deprecated in API level 31.
Use WindowManager.getCurrentWindowMetrics() to identify the current size of the activity window. UI-related work, such as choosing UI layouts, should rely upon WindowMetrics.getBounds(). Use Configuration.densityDpi to get the current density.

Gets the size of the largest region of the display accessible to an app in the current system state, without subtracting any window decor or applying scaling factors.

The size is adjusted based on the current rotation of the display.

The returned size will fall into one of these scenarios:

1. The device has no partitions on the display. The returned value is the largest region of the display accessible to an app in the current system state, regardless of windowing mode.
2. The device divides a single display into multiple partitions. An application is restricted to a portion of the display. This is common in devices where the display changes size, such as foldables or large screens. The returned size will match the portion of the display the application is restricted to.
3. The window manager is emulating a different display size, using adb shell wm size. The returned size will match the emulated display size.

The returned value is unsuitable to use when sizing and placing UI elements, since it does not reflect the application window size in any of these scenarios. WindowManager.getCurrentWindowMetrics() is an alternative that returns the size of the current application window, even if the window is on a device with a partitioned display. This helps prevent UI bugs where UI elements are misaligned or placed beyond the bounds of the window.

Handling multi-window mode correctly is necessary since applications are not always fullscreen. A user on a large screen device, such as a tablet or ChromeOS devices, is more likely to use multi-window modes.

For example, consider a device with a display partitioned into two halves. The user may have a fullscreen application open on the first partition. They may have two applications open in split screen (an example of multi-window mode) on the second partition, with each application consuming half of the partition. In this case, WindowManager.getCurrentWindowMetrics() reports the fullscreen window is half of the screen in size, and each split screen window is a quarter of the screen in size. On the other hand, getRealMetrics(DisplayMetrics) reports half of the screen size for all windows, since the application windows are all restricted to their respective partitions.

getRealSize

public void getRealSize (Point outSize)

This method was deprecated in API level 31.
Use WindowManager.getCurrentWindowMetrics() to identify the current size of the activity window. UI-related work, such as choosing UI layouts, should rely upon WindowMetrics.getBounds().

Gets the size of the largest region of the display accessible to an app in the current system state, without subtracting any window decor or applying scaling factors.

The size is adjusted based on the current rotation of the display.

The returned size will fall into one of these scenarios:

1. The device has no partitions on the display. The returned value is the largest region of the display accessible to an app in the current system state, regardless of windowing mode.
2. The device divides a single display into multiple partitions. An application is restricted to a portion of the display. This is common in devices where the display changes size, such as foldables or large screens. The returned size will match the portion of the display the application is restricted to.
3. The window manager is emulating a different display size, using adb shell wm size. The returned size will match the emulated display size.

The returned value is unsuitable to use when sizing and placing UI elements, since it does not reflect the application window size in any of these scenarios. WindowManager.getCurrentWindowMetrics() is an alternative that returns the size of the current application window, even if the window is on a device with a partitioned display. This helps prevent UI bugs where UI elements are misaligned or placed beyond the bounds of the window.

Handling multi-window mode correctly is necessary since applications are not always fullscreen. A user on a large screen device, such as a tablet or ChromeOS devices, is more likely to use multi-window modes.

For example, consider a device with a display partitioned into two halves. The user may have a fullscreen application open on the first partition. They may have two applications open in split screen (an example of multi-window mode) on the second partition, with each application consuming half of the partition. In this case, WindowManager.getCurrentWindowMetrics() reports the fullscreen window is half of the screen in size, and each split screen window is a quarter of the screen in size. On the other hand, getRealSize(Point) reports half of the screen size for all windows, since the application windows are all restricted to their respective partitions.

getRectSize

public void getRectSize (Rect outSize)

This method was deprecated in API level 30.
Use WindowMetrics.getBounds() to get the dimensions of the application window.

Gets the size of the display as a rectangle, in pixels.

getRefreshRate

public float getRefreshRate ()

Gets the refresh rate of this display in frames per second.

getSize

public void getSize (Point outSize)

This method was deprecated in API level 30.
Use WindowMetrics instead. Obtain a WindowMetrics instance by calling WindowManager.getCurrentWindowMetrics(), then call WindowMetrics.getBounds() to get the dimensions of the application window.

Gets the size of the display in pixels.

The return value does not necessarily represent the actual size (native resolution) of the display. The returned size might be adjusted to exclude certain system decor elements that are always visible, or the size might be scaled to provide compatibility with older applications that were originally designed for smaller displays.

The returned size can also be different depending on the WindowManager bound to the display:

• If size is requested from an activity (either using a WindowManager accessed by getWindowManager() or getSystemService(Context.WINDOW_SERVICE)), the size of the current app window is returned. As a result, in multi-window mode, the returned size can be smaller than the size of the device screen. The returned window size can vary depending on API level:
  • API level 35 and above, the window size will be returned.
  • API level 34 and below, the window size minus system decoration areas and display cutout is returned.
• If size is requested from a non-activity context (for example, the application context, where the WindowManager is accessed by getApplicationContext().getSystemService(Context.WINDOW_SERVICE)), the returned size can vary depending on API level:
  • API level 29 and below — The size of the entire display (based on current rotation) minus system decoration areas is returned.
  • API level 30 and above — The size of the top running activity in the current process is returned, system decoration areas exclusion follows the behavior defined above, based on the caller's API level. If the current process has no running activities, the size of the device default display, including system decoration areas, is returned.

For layout purposes, apps should make a request from an activity context to obtain the size of the display area available for app content.

getSupportedModes

public Mode[] getSupportedModes ()

Gets the supported modes of this display, might include synthetic modes

getSupportedRefreshRates

public float[] getSupportedRefreshRates ()

Get the supported refresh rates of this display in frames per second.

• Android version Build.VERSION_CODES.BAKLAVA and above: returns display supported render rates.
• Android version Build.VERSION_CODES.VANILLA_ICE_CREAM and below: This method only returns refresh rates for the display's default modes. For more options, use getSupportedModes().

getWidth

public int getWidth ()

This method was deprecated in API level 15.
Use width from WindowMetrics.getBounds() instead.

hasArrSupport

public boolean hasArrSupport ()

Returns whether display supports adaptive refresh rate or not.

isHdr

public boolean isHdr ()

Returns whether this display supports any HDR type.

isHdrSdrRatioAvailable

public boolean isHdrSdrRatioAvailable ()

isInternal

public boolean isInternal ()

Check if this is a built-in display. A built-in display is physically part of the device; it's not connected via an external cable, or a Wi-Fi/Overlay/Virtual display.

isMinimalPostProcessingSupported

public boolean isMinimalPostProcessingSupported ()

Returns true if the connected display can be switched into a mode with minimal post processing.

If the Display sink is connected via HDMI, this method will return true if the display supports either Auto Low Latency Mode or Game Content Type.

If the Display sink has an internal connection or uses some other protocol than HDMI, this method will return true if the sink can be switched into an implementation-defined low latency image processing mode.

The ability to switch to a mode with minimal post processing may be disabled by a user setting in the system settings menu. In that case, this method returns false.

isValid

public boolean isValid ()

Returns true if this display is still valid, false if the display has been removed. If the display is invalid, then the methods of this class will continue to report the most recently observed display information. However, it is unwise (and rather fruitless) to continue using a Display object after the display's demise. It's possible for a display that was previously invalid to become valid again if a display with the same id is reconnected.

isWideColorGamut

public boolean isWideColorGamut ()

Returns whether this display can be used to display wide color gamut content. This does not necessarily mean the device itself can render wide color gamut content. To ensure wide color gamut content can be produced, refer to Configuration.isScreenWideColorGamut().

registerHdrSdrRatioChangedListener

public void registerHdrSdrRatioChangedListener (Executor executor, 
                Consumer<Display> listener)

Registers a listener that will be invoked whenever the display's hdr/sdr ratio has changed. After receiving the callback on the specified Executor, call getHdrSdrRatio() to get the updated value. If isHdrSdrRatioAvailable() is false, then an IllegalStateException will be thrown

toString

public String toString ()

Returns a string representation of the object.

unregisterHdrSdrRatioChangedListener

public void unregisterHdrSdrRatioChangedListener (Consumer<Display> listener)