# VirtualDisplayConfig.Builder Added in[API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) # Builder *** ** * ** *** Kotlin\|[Java](https://developer.android.com/reference/android/hardware/display/VirtualDisplayConfig.Builder "View this page in Java") ``` class Builder ``` |---|----------------------------------------------------------------------------------------------------------------------------------------------------------------| | [kotlin.Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html) || | ↳ | [android.hardware.display.VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | A builder for[VirtualDisplayConfig](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig). ## Summary | Public constructors || |----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---| | [Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#Builder(kotlin.String,%20kotlin.Int,%20kotlin.Int,%20kotlin.Int))`(`name:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`, `width:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `height:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `densityDpi:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)` Creates a new Builder. | | Public methods || |---------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | [addDisplayCategory](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#addDisplayCategory(kotlin.String))`(`displayCategory:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`)` Adds a display category. | | [VirtualDisplayConfig](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig) | [build](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#build())`()` Builds the[VirtualDisplayConfig](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig)instance. | | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | [setBrightnessListener](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setBrightnessListener(java.util.concurrent.Executor,%20android.hardware.display.VirtualDisplayConfig.BrightnessListener))`(`executor:` `[Executor](https://developer.android.com/reference/kotlin/java/util/concurrent/Executor.html#)`, `listener:` `[VirtualDisplayConfig.BrightnessListener](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.BrightnessListener)`)` Sets the listener to get notified about changes in the display brightness. | | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | [setDefaultBrightness](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setDefaultBrightness(kotlin.Float))`(`brightness:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` Sets the default brightness of the display. | | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | [setDimBrightness](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setDimBrightness(kotlin.Float))`(`brightness:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` Sets the dim brightness of the display. | | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | [setDisplayCategories](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setDisplayCategories(kotlin.collections.MutableSet))`(`displayCategories:` `[MutableSet](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-set/index.html)<[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!>`)` Sets the display categories. | | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | [setFlags](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setFlags(kotlin.Int))`(`flags:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)` Sets the virtual display flags, a combination of[DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_PUBLIC:kotlin.Int),[DisplayManager.VIRTUAL_DISPLAY_FLAG_PRESENTATION](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_PRESENTATION:kotlin.Int),[DisplayManager.VIRTUAL_DISPLAY_FLAG_SECURE](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_SECURE:kotlin.Int),[DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY:kotlin.Int), or[DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR:kotlin.Int). | | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | [setRequestedRefreshRate](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setRequestedRefreshRate(kotlin.Float))`(`requestedRefreshRate:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` Sets the refresh rate of a virtual display in frames per second. | | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | [setSurface](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setSurface(android.view.Surface))`(`surface:` `[Surface](https://developer.android.com/reference/kotlin/android/view/Surface.html#)?`)` Sets the surface to which the content of the virtual display should be rendered. | ## Public constructors ### Builder Added in[API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` Builder(     name: String,     width: Int,     height: Int,     densityDpi: Int) ``` Creates a new Builder. | Parameters || |--------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `name` | [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html):The name of the virtual display, must be non-empty. This value cannot be`null`. | | `width` | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html):The width of the virtual display in pixels. Must be greater than 0. Value is 1 or greater | | `height` | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html):The height of the virtual display in pixels. Must be greater than 0. Value is 1 or greater | | `densityDpi` | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html):The density of the virtual display in dpi. Must be greater than 0. Value is 1 or greater | ## Public methods ### addDisplayCategory Added in[API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun addDisplayCategory(displayCategory: String): VirtualDisplayConfig.Builder ``` Adds a display category. | Parameters || |-------------------|--------------------------------------------------------------------------------------------------------------| | `displayCategory` | [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html):This value cannot be`null`. | | Return || |---------------------------------------------------------------------------------------------------------------------------------------|-----------------------------| | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | This value cannot be`null`. | **See Also** - [#setDisplayCategories](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setDisplayCategories(kotlin.collections.MutableSet)) ### build Added in[API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun build(): VirtualDisplayConfig ``` Builds the[VirtualDisplayConfig](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig)instance. | Return || |----------------------------------------------------------------------------------------------------------------------|-----------------------------| | [VirtualDisplayConfig](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig) | This value cannot be`null`. | | Exceptions || |--------------------------------------|------------------------------------------------------------------------------| | `java.lang.IllegalArgumentException` | if the dim brightness is set to a value greater than the default brightness. | ### setBrightnessListener Added in[API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun setBrightnessListener(     executor: Executor,     listener: VirtualDisplayConfig.BrightnessListener ): VirtualDisplayConfig.Builder ``` Sets the listener to get notified about changes in the display brightness. | Parameters || |------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `executor` | [Executor](https://developer.android.com/reference/kotlin/java/util/concurrent/Executor.html#):The executor where the callback is executed on. This value cannot be`null`. Callback and listener events are dispatched through this[Executor](https://developer.android.com/reference/kotlin/java/util/concurrent/Executor.html#), providing an easy way to control which thread is used. To dispatch events through the main thread of your application, you can use[Context.getMainExecutor()](https://developer.android.com/reference/kotlin/android/content/Context.html#getMainExecutor()). Otherwise, provide an[Executor](https://developer.android.com/reference/kotlin/java/util/concurrent/Executor.html#)that dispatches to an appropriate thread. | | `listener` | [VirtualDisplayConfig.BrightnessListener](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.BrightnessListener):The listener to get notified when the display brightness has changed. This value cannot be`null`. | | Return || |---------------------------------------------------------------------------------------------------------------------------------------|-----------------------------| | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | This value cannot be`null`. | ### setDefaultBrightness Added in[API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun setDefaultBrightness(brightness: Float): VirtualDisplayConfig.Builder ``` Sets the default brightness of the display. The system will use this brightness value whenever the display should be bright, i.e. it is powered on and not modified due to user activity or app activity. Value of`0.0`indicates the minimum supported brightness and value of`1.0`indicates the maximum supported brightness. If unset, defaults to`0.0` | Parameters || |--------------|-------------------------------------------------------------------------------------------------------------------------| | `brightness` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Value is between 0.0f and 1.0f inclusive | | Return || |---------------------------------------------------------------------------------------------------------------------------------------|-----------------------------| | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | This value cannot be`null`. | | Exceptions || |--------------------------------------|-----------------------------------------------------------| | `java.lang.IllegalArgumentException` | if the brightness is outside the valid range \[0.0, 1.0\] | **See Also** - [android.view.View#setKeepScreenOn(boolean)](https://developer.android.com/reference/kotlin/android/view/View.html#setKeepScreenOn(kotlin.Boolean)) - [#setBrightnessListener(Executor, BrightnessListener)](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setBrightnessListener(java.util.concurrent.Executor,%20android.hardware.display.VirtualDisplayConfig.BrightnessListener)) ### setDimBrightness Added in[API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun setDimBrightness(brightness: Float): VirtualDisplayConfig.Builder ``` Sets the dim brightness of the display. The system will use this brightness value whenever the display should be dim, i.e. it is powered on and dimmed due to user activity or app activity. Value of`0.0`indicates the minimum supported brightness and value of`1.0`indicates the maximum supported brightness. If set, the default brightness must also be set to a value greater or equal to the dim brightness. If unset, defaults to the system default. | Parameters || |--------------|-------------------------------------------------------------------------------------------------------------------------| | `brightness` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Value is between 0.0f and 1.0f inclusive | | Return || |---------------------------------------------------------------------------------------------------------------------------------------|-----------------------------| | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | This value cannot be`null`. | | Exceptions || |--------------------------------------|-----------------------------------------------------------| | `java.lang.IllegalArgumentException` | if the brightness is outside the valid range \[0.0, 1.0\] | **See Also** - [android.hardware.display.VirtualDisplayConfig.Builder#setDefaultBrightness(float)](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setDefaultBrightness(kotlin.Float)) - [#setBrightnessListener(Executor, BrightnessListener)](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#setBrightnessListener(java.util.concurrent.Executor,%20android.hardware.display.VirtualDisplayConfig.BrightnessListener)) ### setDisplayCategories Added in[API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun setDisplayCategories(displayCategories: MutableSet): VirtualDisplayConfig.Builder ``` Sets the display categories. The categories of the display indicate the type of activities allowed to run on that display. Activities can declare a display category using[android.content.pm.ActivityInfo#requiredDisplayCategory](https://developer.android.com/reference/kotlin/android/content/pm/ActivityInfo.html#requiredDisplayCategory:kotlin.String). | Parameters || |---------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `displayCategories` | [MutableSet](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-set/index.html)\<[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!\>:This value cannot be`null`. | | Return || |---------------------------------------------------------------------------------------------------------------------------------------|-----------------------------| | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | This value cannot be`null`. | ### setFlags Added in[API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun setFlags(flags: Int): VirtualDisplayConfig.Builder ``` Sets the virtual display flags, a combination of[DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_PUBLIC:kotlin.Int),[DisplayManager.VIRTUAL_DISPLAY_FLAG_PRESENTATION](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_PRESENTATION:kotlin.Int),[DisplayManager.VIRTUAL_DISPLAY_FLAG_SECURE](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_SECURE:kotlin.Int),[DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY:kotlin.Int), or[DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR:kotlin.Int). | Parameters || |---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `flags` | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html):Value is either`0`or a combination of[android.hardware.display.DisplayManager#VIRTUAL_DISPLAY_FLAG_PUBLIC](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_PUBLIC:kotlin.Int),[android.hardware.display.DisplayManager#VIRTUAL_DISPLAY_FLAG_PRESENTATION](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_PRESENTATION:kotlin.Int),[android.hardware.display.DisplayManager#VIRTUAL_DISPLAY_FLAG_SECURE](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_SECURE:kotlin.Int),[android.hardware.display.DisplayManager#VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY:kotlin.Int),[android.hardware.display.DisplayManager#VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR](https://developer.android.com/reference/kotlin/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR:kotlin.Int), android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_CAN_SHOW_WITH_INSECURE_KEYGUARD, android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_SUPPORTS_TOUCH, android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_ROTATES_WITH_CONTENT, android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_DESTROY_CONTENT_ON_REMOVAL, android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS, android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_TRUSTED, android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_DISPLAY_GROUP, android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_ALWAYS_UNLOCKED, android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_TOUCH_FEEDBACK_DISABLED, android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_FOCUS, and android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_STEAL_TOP_FOCUS_DISABLED | | Return || |---------------------------------------------------------------------------------------------------------------------------------------|-----------------------------| | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | This value cannot be`null`. | ### setRequestedRefreshRate Added in[API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun setRequestedRefreshRate(requestedRefreshRate: Float): VirtualDisplayConfig.Builder ``` Sets the refresh rate of a virtual display in frames per second. For best results, specify a divisor of the physical refresh rate, e.g., 30 or 60 on a 120hz display. If an arbitrary refresh rate is specified, the rate will be rounded up to a divisor of the physical display. If unset or zero, the virtual display will be refreshed at the physical display refresh rate. | Parameters || |------------------------|---------------------------------------------------------------------------------------------------------| | `requestedRefreshRate` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Value is 0.0f or greater | | Return || |---------------------------------------------------------------------------------------------------------------------------------------|-----------------------------| | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | This value cannot be`null`. | **See Also** - [android.view.Display#getRefreshRate()](https://developer.android.com/reference/kotlin/android/view/Display.html#getRefreshRate()) ### setSurface Added in[API level 34](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun setSurface(surface: Surface?): VirtualDisplayConfig.Builder ``` Sets the surface to which the content of the virtual display should be rendered. The surface can also be set after the display creation using[VirtualDisplay.setSurface(Surface)](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplay#setSurface(android.view.Surface)). | Parameters || |-----------|----------------------------------------------------------------------------------------------------------------| | `surface` | [Surface](https://developer.android.com/reference/kotlin/android/view/Surface.html#)?:This value may be`null`. | | Return || |---------------------------------------------------------------------------------------------------------------------------------------|-----------------------------| | [VirtualDisplayConfig.Builder](https://developer.android.com/reference/kotlin/android/hardware/display/VirtualDisplayConfig.Builder#) | This value cannot be`null`. |