Display

java.lang.Object
- ohos.agp.window.service.Display

```
public class Display
extends Object
```
Encapsulate display attributes and operations.
An Display object is returned by DisplayManager.getDefaultDisplay(Context).

从以下版本开始:

2

字段概要

字段
限定符和类型	字段	说明
`static int`	`STATE_DOZE`	Indicate that this screen is dozing.
`static int`	`STATE_DOZE_SUSPEND`	Indicate that this screen is dozing, but the CPU suspends updating it.
`static int`	`STATE_OFF`	Indicate that this screen is off.
`static int`	`STATE_ON`	Indicate that this screen is on.
`static int`	`STATE_ON_SUSPEND`	Indicate that this screen is on, but the CPU suspends updating it.
`static int`	`STATE_UNKNOWN`	Indicate that this screen is in an unknown state.
`static int`	`STATE_VR`	Indicate that this screen is in a virtual reality (VR) state.

构造器概要

构造器
构造器说明

Display()
A constructor used to create a Display instance.

构造器
构造器	说明
`Display()`	A constructor used to create a `Display` instance.

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`DisplayAttributes`	`getAttributes()`	Obtain the Attributes of a display.
`void`	`getCurrentSizeRange(Point outSmallestSize, Point outLargestSize)`	Obtain the size range of a display, in unit of pixels.
`int`	`getDisplayId()`	Obtain the ID of a display.
`String`	`getDisplayName()`	Obtain the name of a display.
`int`	`getDisplayState()`	Obtain the state of this display device.
`DisplayAttributes`	`getRealAttributes()`	Obtain the actual Attributes of a display.
`void`	`getRealSize(Point outSize)`	Obtain the actual display size.
`float`	`getRefreshRate()`	Obtain the screen refresh rate per second of this display device.
`int`	`getRotation()`	Obtain the rotation degree of a display.
`void`	`getSize(Point outSize)`	Obtain the size of a display.
`boolean`	`isAlive()`	Check whether this display device is alive.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - STATE_DOZE
```
public static final int STATE_DOZE
```
    Indicate that this screen is dozing.
    
    从以下版本开始:
    
    5
    
    另请参阅:
    
    常量字段值
  - STATE_DOZE_SUSPEND
```
public static final int STATE_DOZE_SUSPEND
```
    Indicate that this screen is dozing, but the CPU suspends updating it.
    
    从以下版本开始:
    
    5
    
    另请参阅:
    
    常量字段值
  - STATE_OFF
```
public static final int STATE_OFF
```
    Indicate that this screen is off.
    
    从以下版本开始:
    
    5
    
    另请参阅:
    
    常量字段值
  - STATE_ON
```
public static final int STATE_ON
```
    Indicate that this screen is on.
    
    从以下版本开始:
    
    5
    
    另请参阅:
    
    常量字段值
  - STATE_ON_SUSPEND
```
public static final int STATE_ON_SUSPEND
```
    Indicate that this screen is on, but the CPU suspends updating it.
    
    从以下版本开始:
    
    5
    
    另请参阅:
    
    常量字段值
  - STATE_UNKNOWN
```
public static final int STATE_UNKNOWN
```
    Indicate that this screen is in an unknown state.
    
    从以下版本开始:
    
    5
    
    另请参阅:
    
    常量字段值
  - STATE_VR
```
public static final int STATE_VR
```
    Indicate that this screen is in a virtual reality (VR) state.
    
    从以下版本开始:
    
    5
    
    另请参阅:
    
    常量字段值
- 构造器详细资料
  - Display
```
public Display()
```
    A constructor used to create a Display instance.
- 方法详细资料
  - getDisplayId
```
public int getDisplayId()
```
    Obtain the ID of a display.
    
    返回:
    
    Return the display ID.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
  - getDisplayName
```
public String getDisplayName()
```
    Obtain the name of a display.
    
    返回:
    
    Return the display name.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
  - getRotation
```
public int getRotation()
```
    Obtain the rotation degree of a display. The rotation degree is represented by an enumeration value. 0 indicates no rotation, 1 indicates 90 degrees, 2 indicates 180 degrees, and 3 indicates 270 degrees.
    
    返回:
    
    Return the rotation degree of the display.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
  - getAttributes
```
public DisplayAttributes getAttributes()
```
    Obtain the Attributes of a display. The width and height of the navigation bar are excluded.
    
    返回:
    
    Return the Attributes of the display.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
  - getRealAttributes
```
public DisplayAttributes getRealAttributes()
```
    Obtain the actual Attributes of a display.
    
    返回:
    
    Return the actual Attributes of the display.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
  - getCurrentSizeRange
```
public void getCurrentSizeRange(Point outSmallestSize,
                                Point outLargestSize)
```
    Obtain the size range of a display, in unit of pixels.
    This method obtains the maximum and minimum sizes of the display expected in all directions. The obtained display range is stored in the parameters of this method.
    
    参数:
    
    outSmallestSize - Indicate the minimum display size.
    
    outLargestSize - Indicate the maximum display size.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
  - getSize
```
public void getSize(Point outSize)
```
    Obtain the size of a display.
    This method may not return the actual size of the display. For example, the returned value has excluded the size of the status bar if status bar is always displayed, or the value matches a display that has been scaled for adapting to a small-screen device.
    
    参数:
    
    outSize - Indicate the display size.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
  - getRealSize
```
public void getRealSize(Point outSize)
```
    Obtain the actual display size.
    The returned value includes the size of the status bar, without any scale.
    
    参数:
    
    outSize - Indicate the actual size of the display.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
  - getRefreshRate
```
public float getRefreshRate()
```
    Obtain the screen refresh rate per second of this display device.
    
    返回:
    
    Return the screen refresh rate per second, in Hz.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
    
    从以下版本开始:
    
    5
  - getDisplayState
```
public int getDisplayState()
```
    Obtain the state of this display device.
    
    返回:
    
    Return the display device state, which can be STATE_OFF, STATE_ON, STATE_DOZE, STATE_DOZE_SUSPEND, STATE_ON_SUSPEND, or STATE_UNKNOWN.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
    
    从以下版本开始:
    
    5
  - isAlive
```
public boolean isAlive()
```
    Check whether this display device is alive.
    
    返回:
    
    Return true if this display device is alive; returns false if this display device is removed.
    
    抛出:
    
    NullPointerException - Throws this exception if mDisplayWrapper is null.
    
    从以下版本开始:
    
    5

类 Display

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

STATE_DOZE

STATE_DOZE_SUSPEND

STATE_OFF

STATE_ON

STATE_ON_SUSPEND

STATE_UNKNOWN

STATE_VR

构造器详细资料

Display

方法详细资料

getDisplayId

getDisplayName

getRotation

getAttributes

getRealAttributes

getCurrentSizeRange

getSize

getRealSize

getRefreshRate

getDisplayState

isAlive