IT. Expert System.

Android Reference

DisplayMetrics

android.util

Class DisplayMetrics

java.lang.Object
- android.util.DisplayMetrics

```
public class DisplayMetrics
extends Object
```
A structure describing general information about a display, such as its size, density, and font scaling.
To access the DisplayMetrics members, initialize an object like this:
```
 DisplayMetrics metrics = new DisplayMetrics();
 getWindowManager().getDefaultDisplay().getMetrics(metrics);
```

Field Summary

Fields
Modifier and Type	Field and Description
`float`	`density` The logical density of the display.
`static int`	`DENSITY_DEFAULT` The reference density used throughout the system.
`static float`	`DENSITY_DEFAULT_SCALE` Scaling factor to convert a density in DPI units to the density scale.
`static int`	`DENSITY_DEVICE` Deprecated. There is no longer a static density; you can find the density for a display in `densityDpi`.
`static int`	`DENSITY_HIGH` Standard quantized DPI for high-density screens.
`static int`	`DENSITY_LOW` Standard quantized DPI for low-density screens.
`static int`	`DENSITY_MEDIUM` Standard quantized DPI for medium-density screens.
`static int`	`DENSITY_TV` This is a secondary density, added for some common screen configurations.
`static int`	`DENSITY_XHIGH` Standard quantized DPI for extra-high-density screens.
`static int`	`DENSITY_XXHIGH` Standard quantized DPI for extra-extra-high-density screens.
`int`	`densityDpi` The screen density expressed as dots-per-inch.
`int`	`heightPixels` The absolute height of the display in pixels.
`float`	`noncompatDensity` The reported display density prior to any compatibility mode scaling being applied.
`int`	`noncompatDensityDpi` The reported display density prior to any compatibility mode scaling being applied.
`int`	`noncompatHeightPixels` The reported display height prior to any compatibility mode scaling being applied.
`float`	`noncompatScaledDensity` The reported scaled density prior to any compatibility mode scaling being applied.
`int`	`noncompatWidthPixels` The reported display width prior to any compatibility mode scaling being applied.
`float`	`noncompatXdpi` The reported display xdpi prior to any compatibility mode scaling being applied.
`float`	`noncompatYdpi` The reported display ydpi prior to any compatibility mode scaling being applied.
`float`	`scaledDensity` A scaling factor for fonts displayed on the display.
`int`	`widthPixels` The absolute width of the display in pixels.
`float`	`xdpi` The exact physical pixels per inch of the screen in the X dimension.
`float`	`ydpi` The exact physical pixels per inch of the screen in the Y dimension.

Constructor Summary

Constructors
Constructor and Description

DisplayMetrics()

Constructors
Constructor and Description
`DisplayMetrics()`

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`equals(DisplayMetrics other)` Returns true if these display metrics equal the other display metrics.
`boolean`	`equals(Object o)` Compares this instance with the specified object and indicates if they are equal.
`int`	`hashCode()` Returns an integer hash code for this object.
`void`	`setTo(DisplayMetrics o)`
`void`	`setToDefaults()`
`String`	`toString()` Returns a string containing a concise, human-readable description of this object.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - DENSITY_LOW
```
public static final int DENSITY_LOW
```
    Standard quantized DPI for low-density screens.
    
    See Also:
    Constant Field Values
  - DENSITY_MEDIUM
```
public static final int DENSITY_MEDIUM
```
    Standard quantized DPI for medium-density screens.
    
    See Also:
    Constant Field Values
  - DENSITY_TV
```
public static final int DENSITY_TV
```
    This is a secondary density, added for some common screen configurations. It is recommended that applications not generally target this as a first class density -- that is, don't supply specific graphics for this density, instead allow the platform to scale from other densities (typically DENSITY_HIGH) as appropriate. In most cases (such as using bitmaps in Drawable) the platform can perform this scaling at load time, so the only cost is some slight startup runtime overhead.
    This density was original introduced to correspond with a 720p TV screen: the density for 1080p televisions is DENSITY_XHIGH, and the value here provides the same UI size for a TV running at 720p. It has also found use in 7" tablets, when these devices have 1280x720 displays.
    
    See Also:
    Constant Field Values
  - DENSITY_HIGH
```
public static final int DENSITY_HIGH
```
    Standard quantized DPI for high-density screens.
    
    See Also:
    Constant Field Values
  - DENSITY_XHIGH
```
public static final int DENSITY_XHIGH
```
    Standard quantized DPI for extra-high-density screens.
    
    See Also:
    Constant Field Values
  - DENSITY_XXHIGH
```
public static final int DENSITY_XXHIGH
```
    Standard quantized DPI for extra-extra-high-density screens. Applications should not generally worry about this density; relying on XHIGH graphics being scaled up to it should be sufficient for almost all cases.
    
    See Also:
    Constant Field Values
  - DENSITY_DEFAULT
```
public static final int DENSITY_DEFAULT
```
    The reference density used throughout the system.
    
    See Also:
    Constant Field Values
  - DENSITY_DEFAULT_SCALE
```
public static final float DENSITY_DEFAULT_SCALE
```
    Scaling factor to convert a density in DPI units to the density scale.
    
    See Also:
    Constant Field Values
  - DENSITY_DEVICE
```
@Deprecated
public static int DENSITY_DEVICE
```
    Deprecated. There is no longer a static density; you can find the density for a display in densityDpi.
    
    The device's density.
  - widthPixels
```
public int widthPixels
```
    The absolute width of the display in pixels.
  - heightPixels
```
public int heightPixels
```
    The absolute height of the display in pixels.
  - density
```
public float density
```
    The logical density of the display. This is a scaling factor for the Density Independent Pixel unit, where one DIP is one pixel on an approximately 160 dpi screen (for example a 240x320, 1.5"x2" screen), providing the baseline of the system's display. Thus on a 160dpi screen this density value will be 1; on a 120 dpi screen it would be .75; etc.
    This value does not exactly follow the real screen size (as given by xdpi and ydpi, but rather is used to scale the size of the overall UI in steps based on gross changes in the display dpi. For example, a 240x320 screen will have a density of 1 even if its width is 1.8", 1.3", etc. However, if the screen resolution is increased to 320x480 but the screen size remained 1.5"x2" then the density would be increased (probably to 1.5).
    
    See Also:
    DENSITY_DEFAULT
  - densityDpi
```
public int densityDpi
```
    The screen density expressed as dots-per-inch. May be either DENSITY_LOW, DENSITY_MEDIUM, or DENSITY_HIGH.
  - scaledDensity
```
public float scaledDensity
```
    A scaling factor for fonts displayed on the display. This is the same as density, except that it may be adjusted in smaller increments at runtime based on a user preference for the font size.
  - xdpi
```
public float xdpi
```
    The exact physical pixels per inch of the screen in the X dimension.
  - ydpi
```
public float ydpi
```
    The exact physical pixels per inch of the screen in the Y dimension.
  - noncompatWidthPixels
```
public int noncompatWidthPixels
```
    The reported display width prior to any compatibility mode scaling being applied.
  - noncompatHeightPixels
```
public int noncompatHeightPixels
```
    The reported display height prior to any compatibility mode scaling being applied.
  - noncompatDensity
```
public float noncompatDensity
```
    The reported display density prior to any compatibility mode scaling being applied.
  - noncompatDensityDpi
```
public int noncompatDensityDpi
```
    The reported display density prior to any compatibility mode scaling being applied.
  - noncompatScaledDensity
```
public float noncompatScaledDensity
```
    The reported scaled density prior to any compatibility mode scaling being applied.
  - noncompatXdpi
```
public float noncompatXdpi
```
    The reported display xdpi prior to any compatibility mode scaling being applied.
  - noncompatYdpi
```
public float noncompatYdpi
```
    The reported display ydpi prior to any compatibility mode scaling being applied.
- Constructor Detail
  - DisplayMetrics
```
public DisplayMetrics()
```
- Method Detail
  - setTo
```
public void setTo(DisplayMetrics o)
```
  - setToDefaults
```
public void setToDefaults()
```
  - equals
```
public boolean equals(Object o)
```
    Description copied from class: Object
    
    Compares this instance with the specified object and indicates if they are equal. In order to be equal, o must represent the same object as this instance using a class-specific comparison. The general contract is that this comparison should be reflexive, symmetric, and transitive. Also, no object reference other than null is equal to null.
    The default implementation returns true only if this == o. See Writing a correct equals method if you intend implementing your own equals method.
    The general contract for the equals and Object.hashCode() methods is that if equals returns true for any two objects, then hashCode() must return the same value for these objects. This means that subclasses of Object usually override either both methods or neither of them.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    o - the object to compare this instance with.
    
    Returns:
    true if the specified object is equal to this Object; false otherwise.
    See Also:
    Object.hashCode()
  - equals
```
public boolean equals(DisplayMetrics other)
```
    Returns true if these display metrics equal the other display metrics.
    
    Parameters:
    other - The display metrics with which to compare.
    
    Returns:
    True if the display metrics are equal.
  - hashCode
```
public int hashCode()
```
    Description copied from class: Object
    
    Returns an integer hash code for this object. By contract, any two objects for which Object.equals(java.lang.Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.
    Note that hash values must not change over time unless information used in equals comparisons also changes.
    See Writing a correct hashCode method if you intend implementing your own hashCode method.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    this object's hash code.
    See Also:
    Object.equals(java.lang.Object)
  - toString
```
public String toString()
```
    Description copied from class: Object
    Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
```
   getClass().getName() + '@' + Integer.toHexString(hashCode())
```
    See Writing a useful toString method if you intend implementing your own toString method.
    Overrides:
    
    toString in class Object
    
    Returns:
    a printable representation of this object.

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IT. Expert System.

Android Reference

DisplayMetrics

Class DisplayMetrics

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DENSITY_LOW

DENSITY_MEDIUM

DENSITY_TV

DENSITY_HIGH

DENSITY_XHIGH

DENSITY_XXHIGH

DENSITY_DEFAULT

DENSITY_DEFAULT_SCALE

DENSITY_DEVICE

widthPixels

heightPixels

density

densityDpi

scaledDensity

xdpi

ydpi

noncompatWidthPixels

noncompatHeightPixels

noncompatDensity

noncompatDensityDpi

noncompatScaledDensity

noncompatXdpi

noncompatYdpi

Constructor Detail

DisplayMetrics

Method Detail

setTo

setToDefaults

equals

equals

hashCode

toString

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary