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| 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, initialize an object like this:
DisplayMetrics metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics);
| Constants | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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. | |||||||||
| Fields | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| density | The logical density of the display. | ||||||||||
| densityDpi | The screen density expressed as dots-per-inch. | ||||||||||
| heightPixels | The absolute height of the display in pixels. | ||||||||||
| scaledDensity | A scaling factor for fonts displayed on the display. | ||||||||||
| widthPixels | The absolute width of the display in pixels. | ||||||||||
| xdpi | The exact physical pixels per inch of the screen in the X dimension. | ||||||||||
| ydpi | The exact physical pixels per inch of the screen in the Y dimension. | ||||||||||
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| Public Methods | |||||||||||
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Returns a string containing a concise, human-readable description of this
object.
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From class
java.lang.Object
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The reference density used throughout the system.
Standard quantized DPI for high-density screens.
Standard quantized DPI for low-density screens.
Standard quantized DPI for medium-density screens.
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.
Standard quantized DPI for extra-high-density screens.
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.
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).
The screen density expressed as dots-per-inch. May be either
DENSITY_LOW, DENSITY_MEDIUM, or DENSITY_HIGH.
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.
The exact physical pixels per inch of the screen in the X dimension.
The exact physical pixels per inch of the screen in the Y dimension.
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.