[Android] DisplayMetrics

DisplayMetrics DisplayMetrics 구조체에서 디스플레이에 대한 정보를 얻을 수 있다. 

Android는 직접 픽셀 매핑을 사용하지 않지만 소수의 Density Independent Pixel 값을 사용하여 실제 화면 크기에 맞게 조정한다. 

 

| 방법1. 밀도 상수로 구분

DisplayMetrics metrics = getResources().getDisplayMetrics();
int density = metrics.densityDpi
// DENSITY_xxx 상수 (120, 160, 213, 240, 320, 480 또는 640 dpi) 중 하나
 

 

** 실제lcd 픽셀 밀도가 필요한 경우

수평 및 수직 밀도 각각에 대해 metrics.xdpi 및 metrics.ydpi 속성에서 가져올 수 있다. 

DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);

// will either be DENSITY_LOW, DENSITY_MEDIUM or DENSITY_HIGH
int dpiClassification = dm.densityDpi;

// these will return the actual dpi horizontally and vertically
float xDpi = dm.xdpi;
float yDpi = dm.ydpi;

 

| 방법2. 상수값으로 구분

//방법 2 상수
getResources().getDisplayMetrics().density;

/*
0.75 - ldpi
1.0 - mdpi
1.5 - hdpi
2.0 - xhdpi
3.0 - xxhdpi
4.0 - xxxhdpi
*/

 

// 4이전의 API 수준을 대상으로 지정하는 경우 : metrics.density = 참조밀도(160dpi)의 소수점 배율 인수 
int densityDpi = (int)(metrics.density * 160f);

| Sample Code

int densityDpi = getResources().getDisplayMetrics().densityDpi;

switch (densityDpi)
{
    case DisplayMetrics.DENSITY_LOW:
        // LDPI : density == 0.75f
        break;

    case DisplayMetrics.DENSITY_MEDIUM:
        // MDPI : density >= 1.0f && density < 1.5f 
        break;

    case DisplayMetrics.DENSITY_TV:
    case DisplayMetrics.DENSITY_HIGH:
        // HDPI : density == 1.5f
        break;

    case DisplayMetrics.DENSITY_XHIGH:
    case DisplayMetrics.DENSITY_280:
        // XHDPI : density > 1.5f && density <= 2.0f
        break;

    case DisplayMetrics.DENSITY_XXHIGH:
    case DisplayMetrics.DENSITY_360:
    case DisplayMetrics.DENSITY_400:
    case DisplayMetrics.DENSITY_420:
        // XXHDPI : density > 2.0f && density <= 3.0f
        break;

    case DisplayMetrics.DENSITY_XXXHIGH:
    case DisplayMetrics.DENSITY_560:
        // XXXHDPI : density > 4.0f
        break;
}

 

 

Summary 

int	DENSITY_140 Intermediate density for screens that sit between DENSITY_LOW (120dpi) and DENSITY_MEDIUM (160dpi).
int	DENSITY_180 Intermediate density for screens that sit between DENSITY_MEDIUM (160dpi) and DENSITY_HIGH (240dpi).
int	DENSITY_200 Intermediate density for screens that sit between DENSITY_MEDIUM (160dpi) and DENSITY_HIGH (240dpi).
int	DENSITY_220 Intermediate density for screens that sit between DENSITY_MEDIUM (160dpi) and DENSITY_HIGH (240dpi).
int	DENSITY_260 Intermediate density for screens that sit between DENSITY_HIGH (240dpi) and DENSITY_XHIGH (320dpi).
int	DENSITY_280 Intermediate density for screens that sit between DENSITY_HIGH (240dpi) and DENSITY_XHIGH (320dpi).
int	DENSITY_300 Intermediate density for screens that sit between DENSITY_HIGH (240dpi) and DENSITY_XHIGH (320dpi).
int	DENSITY_340 Intermediate density for screens that sit somewhere between DENSITY_XHIGH (320 dpi) and DENSITY_XXHIGH (480 dpi).
int	DENSITY_360 Intermediate density for screens that sit somewhere between DENSITY_XHIGH (320 dpi) and DENSITY_XXHIGH (480 dpi).
int	DENSITY_400 Intermediate density for screens that sit somewhere between DENSITY_XHIGH (320 dpi) and DENSITY_XXHIGH (480 dpi).
int	DENSITY_420 Intermediate density for screens that sit somewhere between DENSITY_XHIGH (320 dpi) and DENSITY_XXHIGH (480 dpi).
int	DENSITY_440 Intermediate density for screens that sit somewhere between DENSITY_XHIGH (320 dpi) and DENSITY_XXHIGH (480 dpi).
int	DENSITY_450 Intermediate density for screens that sit somewhere between DENSITY_XHIGH (320 dpi) and DENSITY_XXHIGH (480 dpi).
int	DENSITY_560 Intermediate density for screens that sit somewhere between DENSITY_XXHIGH (480 dpi) and DENSITY_XXXHIGH (640 dpi).
int	DENSITY_600 Intermediate density for screens that sit somewhere between DENSITY_XXHIGH (480 dpi) and DENSITY_XXXHIGH (640 dpi).
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 A scaling factor for fonts displayed on the display.
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(Object o) Indicates whether some other object is "equal to" this one.
boolean	equals(DisplayMetrics other) Returns true if these display metrics equal the other display metrics.
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.

 

DisplayMetrics  |  Android 개발자  |  Android Developers