DisplayMetrics
public
class
DisplayMetrics
extends Object
java.lang.Object | |
↳ | android.util.DisplayMetrics |
A structure describing general information about a display, such as its size, density, and font scaling.
To access the DisplayMetrics members, retrieve display metrics like this:
context.getResources().getDisplayMetrics();
For UI layout, obtain WindowMetrics
from
WindowManager.getCurrentWindowMetrics()
. DisplayMetrics
should only be used for
obtaining display related properties, such as xdpi
and ydpi
See density
for more information about the differences between xdpi
,
ydpi
and density
.
Summary
Constants | |
---|---|
int |
DENSITY_140
Intermediate density for screens that sit between |
int |
DENSITY_180
Intermediate density for screens that sit between |
int |
DENSITY_200
Intermediate density for screens that sit between |
int |
DENSITY_220
Intermediate density for screens that sit between |
int |
DENSITY_260
Intermediate density for screens that sit between |
int |
DENSITY_280
Intermediate density for screens that sit between |
int |
DENSITY_300
Intermediate density for screens that sit between |
int |
DENSITY_340
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_360
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_390
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_400
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_420
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_440
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_450
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_520
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_560
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_600
Intermediate density for screens that sit somewhere between
|
int |
DENSITY_DEFAULT
The reference density used throughout the system. |
int |
DENSITY_HIGH
Standard quantized DPI for high-density screens. |
int |
DENSITY_LOW
Standard quantized DPI for low-density screens. |
int |
DENSITY_MEDIUM
Standard quantized DPI for medium-density screens. |
int |
DENSITY_TV
This is a secondary density, added for some common screen configurations. |
int |
DENSITY_XHIGH
Standard quantized DPI for extra-high-density screens. |
int |
DENSITY_XXHIGH
Standard quantized DPI for extra-extra-high-density screens. |
int |
DENSITY_XXXHIGH
Standard quantized DPI for extra-extra-extra-high-density screens. |
Fields | |
---|---|
public
static
final
int |
DENSITY_DEVICE_STABLE
The device's stable density. |
public
float |
density
The logical density of the display. |
public
int |
densityDpi
The screen density expressed as dots-per-inch. |
public
int |
heightPixels
The absolute height of the available display size in pixels. |
public
float |
scaledDensity
This field was deprecated
in API level 34.
this scalar factor is no longer accurate due to adaptive non-linear font scaling.
Please use |
public
int |
widthPixels
The absolute width of the available display size in pixels. |
public
float |
xdpi
The exact physical pixels per inch of the screen in the X dimension. |
public
float |
ydpi
The exact physical pixels per inch of the screen in the Y dimension. |
Public constructors | |
---|---|
DisplayMetrics()
|
Public methods | |
---|---|
boolean
|
equals(DisplayMetrics other)
Returns true if these display metrics equal the other display metrics. |
boolean
|
equals(Object o)
Indicates whether some other object is "equal to" this one. |
int
|
hashCode()
Returns a hash code value for the object. |
void
|
setTo(DisplayMetrics o)
|
void
|
setToDefaults()
|
String
|
toString()
Returns a string representation of the object. |
Inherited methods | |
---|---|
Constants
DENSITY_140
public static final int DENSITY_140
Intermediate density for screens that sit between DENSITY_LOW
(120dpi) and
DENSITY_MEDIUM
(160dpi). This is not a density that applications should target,
instead relying on the system to scale their DENSITY_MEDIUM
assets for them.
Constant Value: 140 (0x0000008c)
DENSITY_180
public static final int DENSITY_180
Intermediate density for screens that sit between DENSITY_MEDIUM
(160dpi) and
DENSITY_HIGH
(240dpi). This is not a density that applications should target,
instead relying on the system to scale their DENSITY_HIGH
assets for them.
Constant Value: 180 (0x000000b4)
DENSITY_200
public static final int DENSITY_200
Intermediate density for screens that sit between DENSITY_MEDIUM
(160dpi) and
DENSITY_HIGH
(240dpi). This is not a density that applications should target,
instead relying on the system to scale their DENSITY_HIGH
assets for them.
Constant Value: 200 (0x000000c8)
DENSITY_220
public static final int DENSITY_220
Intermediate density for screens that sit between DENSITY_MEDIUM
(160dpi) and
DENSITY_HIGH
(240dpi). This is not a density that applications should target,
instead relying on the system to scale their DENSITY_HIGH
assets for them.
Constant Value: 220 (0x000000dc)
DENSITY_260
public static final int DENSITY_260
Intermediate density for screens that sit between DENSITY_HIGH
(240dpi) and
DENSITY_XHIGH
(320dpi). This is not a density that applications should target,
instead relying on the system to scale their DENSITY_XHIGH
assets for them.
Constant Value: 260 (0x00000104)
DENSITY_280
public static final int DENSITY_280
Intermediate density for screens that sit between DENSITY_HIGH
(240dpi) and
DENSITY_XHIGH
(320dpi). This is not a density that applications should target,
instead relying on the system to scale their DENSITY_XHIGH
assets for them.
Constant Value: 280 (0x00000118)
DENSITY_300
public static final int DENSITY_300
Intermediate density for screens that sit between DENSITY_HIGH
(240dpi) and
DENSITY_XHIGH
(320dpi). This is not a density that applications should target,
instead relying on the system to scale their DENSITY_XHIGH
assets for them.
Constant Value: 300 (0x0000012c)
DENSITY_340
public static final int DENSITY_340
Intermediate density for screens that sit somewhere between
DENSITY_XHIGH
(320 dpi) and DENSITY_XXHIGH
(480 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXHIGH
assets for them.
Constant Value: 340 (0x00000154)
DENSITY_360
public static final int DENSITY_360
Intermediate density for screens that sit somewhere between
DENSITY_XHIGH
(320 dpi) and DENSITY_XXHIGH
(480 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXHIGH
assets for them.
Constant Value: 360 (0x00000168)
DENSITY_390
public static final int DENSITY_390
Intermediate density for screens that sit somewhere between
DENSITY_XHIGH
(320 dpi) and DENSITY_XXHIGH
(480 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXHIGH
assets for them.
Constant Value: 390 (0x00000186)
DENSITY_400
public static final int DENSITY_400
Intermediate density for screens that sit somewhere between
DENSITY_XHIGH
(320 dpi) and DENSITY_XXHIGH
(480 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXHIGH
assets for them.
Constant Value: 400 (0x00000190)
DENSITY_420
public static final int DENSITY_420
Intermediate density for screens that sit somewhere between
DENSITY_XHIGH
(320 dpi) and DENSITY_XXHIGH
(480 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXHIGH
assets for them.
Constant Value: 420 (0x000001a4)
DENSITY_440
public static final int DENSITY_440
Intermediate density for screens that sit somewhere between
DENSITY_XHIGH
(320 dpi) and DENSITY_XXHIGH
(480 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXHIGH
assets for them.
Constant Value: 440 (0x000001b8)
DENSITY_450
public static final int DENSITY_450
Intermediate density for screens that sit somewhere between
DENSITY_XHIGH
(320 dpi) and DENSITY_XXHIGH
(480 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXHIGH
assets for them.
Constant Value: 450 (0x000001c2)
DENSITY_520
public static final int DENSITY_520
Intermediate density for screens that sit somewhere between
DENSITY_XXHIGH
(480 dpi) and DENSITY_XXXHIGH
(640 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXXHIGH
assets for them.
Constant Value: 520 (0x00000208)
DENSITY_560
public static final int DENSITY_560
Intermediate density for screens that sit somewhere between
DENSITY_XXHIGH
(480 dpi) and DENSITY_XXXHIGH
(640 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXXHIGH
assets for them.
Constant Value: 560 (0x00000230)
DENSITY_600
public static final int DENSITY_600
Intermediate density for screens that sit somewhere between
DENSITY_XXHIGH
(480 dpi) and DENSITY_XXXHIGH
(640 dpi).
This is not a density that applications should target, instead relying
on the system to scale their DENSITY_XXXHIGH
assets for them.
Constant Value: 600 (0x00000258)
DENSITY_DEFAULT
public static final int DENSITY_DEFAULT
The reference density used throughout the system.
Constant Value: 160 (0x000000a0)
DENSITY_HIGH
public static final int DENSITY_HIGH
Standard quantized DPI for high-density screens.
Constant Value: 240 (0x000000f0)
DENSITY_LOW
public static final int DENSITY_LOW
Standard quantized DPI for low-density screens.
Constant Value: 120 (0x00000078)
DENSITY_MEDIUM
public static final int DENSITY_MEDIUM
Standard quantized DPI for medium-density screens.
Constant Value: 160 (0x000000a0)
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.
Constant Value: 213 (0x000000d5)
DENSITY_XHIGH
public static final int DENSITY_XHIGH
Standard quantized DPI for extra-high-density screens.
Constant Value: 320 (0x00000140)
DENSITY_XXHIGH
public static final int DENSITY_XXHIGH
Standard quantized DPI for extra-extra-high-density screens.
Constant Value: 480 (0x000001e0)
DENSITY_XXXHIGH
public static final int DENSITY_XXXHIGH
Standard quantized DPI for extra-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. A typical use of this density would be 4K television screens -- 3840x2160, which is 2x a traditional HD 1920x1080 screen which runs at DENSITY_XHIGH.
Constant Value: 640 (0x00000280)
Fields
DENSITY_DEVICE_STABLE
public static final int DENSITY_DEVICE_STABLE
The device's stable density.
This value is constant at run time and may not reflect the current
display density. To obtain the current density for a specific display,
use densityDpi
.
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:
densityDpi
public int densityDpi
The screen density expressed as dots-per-inch. May be any one of the
DENSITY_
constants defined above.
New constants are frequently added, and constants added on new Android
versions may be backported to previous Android versions, so applications
should not strongly rely on density matching one of the enum constants.
Value is DENSITY_LOW
, DENSITY_140
, DENSITY_MEDIUM
, DENSITY_180
, DENSITY_200
, DENSITY_TV
, DENSITY_220
, DENSITY_HIGH
, DENSITY_260
, DENSITY_280
, DENSITY_300
, DENSITY_XHIGH
, DENSITY_340
, DENSITY_360
, DENSITY_390
, DENSITY_400
, DENSITY_420
, DENSITY_440
, DENSITY_450
, DENSITY_XXHIGH
, DENSITY_520
, DENSITY_560
, DENSITY_600
, or DENSITY_XXXHIGH
heightPixels
public int heightPixels
The absolute height of the available display size in pixels.
scaledDensity
public float scaledDensity
This field was deprecated
in API level 34.
this scalar factor is no longer accurate due to adaptive non-linear font scaling.
Please use TypedValue.applyDimension(int, float, DisplayMetrics)
or
TypedValue.deriveDimension(int, float, DisplayMetrics)
to convert between SP font
sizes and pixels.
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.
widthPixels
public int widthPixels
The absolute width of the available display size in pixels.
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.
Public constructors
Public methods
equals
public boolean equals (DisplayMetrics other)
Returns true if these display metrics equal the other display metrics.
Parameters | |
---|---|
other |
DisplayMetrics : The display metrics with which to compare. |
Returns | |
---|---|
boolean |
True if the display metrics are equal. |
equals
public boolean equals (Object o)
Indicates whether some other object is "equal to" this one.
The equals
method implements an equivalence relation
on non-null object references:
- It is reflexive: for any non-null reference value
x
,x.equals(x)
should returntrue
. - It is symmetric: for any non-null reference values
x
andy
,x.equals(y)
should returntrue
if and only ify.equals(x)
returnstrue
. - It is transitive: for any non-null reference values
x
,y
, andz
, ifx.equals(y)
returnstrue
andy.equals(z)
returnstrue
, thenx.equals(z)
should returntrue
. - It is consistent: for any non-null reference values
x
andy
, multiple invocations ofx.equals(y)
consistently returntrue
or consistently returnfalse
, provided no information used inequals
comparisons on the objects is modified. - For any non-null reference value
x
,x.equals(null)
should returnfalse
.
An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.
Parameters | |
---|---|
o |
Object : This value may be null . |
Returns | |
---|---|
boolean |
true if this object is the same as the obj
argument; false otherwise. |
hashCode
public int hashCode ()
Returns a hash code value for the object. This method is
supported for the benefit of hash tables such as those provided by
HashMap
.
The general contract of hashCode
is:
- Whenever it is invoked on the same object more than once during
an execution of a Java application, the
hashCode
method must consistently return the same integer, provided no information used inequals
comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. - If two objects are equal according to the
equals
method, then calling thehashCode
method on each of the two objects must produce the same integer result. - It is not required that if two objects are unequal
according to the
equals
method, then calling thehashCode
method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
Returns | |
---|---|
int |
a hash code value for this object. |
toString
public String toString ()
Returns a string representation of the object.
Returns | |
---|---|
String |
a string representation of the object. |