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Summary: Nested Classes | Methods | Inherited Methods

# VirtualDisplay

`public final class VirtualDisplay`
`extends Object` ``

java.lang.Object
↳ | android.hardware.display.VirtualDisplay

Represents a virtual display. The content of a virtual display is rendered to a `Surface` that you must provide to `createVirtualDisplay()`.

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. However, you should also explicitly call `release()` when you're done with it.

See also:

- `DisplayManager.createVirtualDisplay(String, int, int, int, Surface, int)`

## Summary

### Nested classes
`class` | `VirtualDisplay.Callback` Interface for receiving information about a `VirtualDisplay`'s state changes.

### Public methods
`Display` | `getDisplay()` Gets the virtual display.
`Surface` | `getSurface()` Gets the surface that backs the virtual display.
`void` | `release()` Releases the virtual display and destroys its underlying surface.
`void` | `resize(int width, int height, int densityDpi)` Asks the virtual display to resize.
`void` | `setSurface(Surface surface)` Sets the surface that backs the virtual display.
`String` | `toString()` Returns a string representation of the object.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Public methods

### getDisplay

    public Display getDisplay ()

Gets the virtual display.

Returns
`Display` |

### getSurface

    public Surface getSurface ()

Gets the surface that backs the virtual display.

Returns
`Surface` |

### release

    public void release ()

Releases the virtual display and destroys its underlying surface.

All remaining windows on the virtual display will be forcibly removed as part of releasing the virtual display.

### resize

    public void resize (int width,
                    int height,
                    int densityDpi)

Asks the virtual display to resize.

This is really just a convenience to allow applications using virtual displays to adapt to changing conditions without having to tear down and recreate the display.

Parameters
`width` | `int`
`height` | `int`
`densityDpi` | `int`

### setSurface

    public void setSurface (Surface surface)

Sets the surface that backs the virtual display.

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

It is still the caller's responsibility to destroy the surface after it has been detached.

Parameters
`surface` | `Surface`: The surface to set, or null to detach the surface from the virtual display.

### toString

    public String toString ()

Returns a string representation of the object. In general, the `toString` method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The `toString` method for class `Object` returns a string consisting of the name of the class of which the object is an instance, the at-sign character ``@`', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

>      getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
`String` | a string representation of the object.

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