xey.elib.utils

类 ColorUtils

java.lang.Object

xey.elib.utils.ColorUtils

public class ColorUtils
extends Object

Utility methods for working with colors.

嵌套类概要

嵌套类

限定符和类型	类和说明
static interface	ColorUtils.Lightness

字段概要

字段

限定符和类型	字段和说明
static int	IS_DARK
static int	IS_LIGHT
static int	LIGHTNESS_UNKNOWN

方法概要

方法

限定符和类型	方法和说明
static int	blendColors(int color1, int color2, float ratio) Blend color1 and color2 using the given ratio.
static Palette.Swatch	getMostPopulousSwatch(Palette palette)
static boolean	isDark(android.graphics.Bitmap bitmap, int backupPixelX, int backupPixelY) Determines if a given bitmap is dark.
static int	isDark(Palette palette) Checks if the most populous color in the given palette is dark Annoyingly we have to return this Lightness 'enum' rather than a boolean as palette isn't guaranteed to find the most populous color.
static int	modifyAlpha(int color, float alpha) Set the alpha component of color to be alpha.
static int	modifyAlpha(int color, int alpha) Set the alpha component of color to be alpha.
static int	scrimify(int color, boolean isDark, float lightnessMultiplier) Calculate a variant of the color to make it more suitable for overlaying information.
static int	scrimify(int color, float lightnessMultiplier)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

IS_LIGHT

public static final int IS_LIGHT

另请参阅:

常量字段值

IS_DARK

public static final int IS_DARK

另请参阅:

常量字段值

LIGHTNESS_UNKNOWN

public static final int LIGHTNESS_UNKNOWN

另请参阅:

常量字段值

方法详细资料

modifyAlpha

public static int modifyAlpha(int color,
              int alpha)

Set the alpha component of color to be alpha.

modifyAlpha

public static int modifyAlpha(int color,
              float alpha)

Set the alpha component of color to be alpha.

blendColors

public static int blendColors(int color1,
              int color2,
              float ratio)

Blend color1 and color2 using the given ratio.

参数:

ratio - of which to blend. 0.0 will return color1, 0.5 will give an even blend, 1.0 will return color2.

isDark

public static int isDark(Palette palette)

Checks if the most populous color in the given palette is dark

Annoyingly we have to return this Lightness 'enum' rather than a boolean as palette isn't guaranteed to find the most populous color.

getMostPopulousSwatch

public static Palette.Swatch getMostPopulousSwatch(Palette palette)

isDark

public static boolean isDark(android.graphics.Bitmap bitmap,
             int backupPixelX,
             int backupPixelY)

Determines if a given bitmap is dark. This extracts a palette inline so should not be called with a large image!! If palette fails then check the color of the specified pixel

scrimify

public static int scrimify(int color,
           boolean isDark,
           float lightnessMultiplier)

Calculate a variant of the color to make it more suitable for overlaying information. Light colors will be lightened and dark colors will be darkened

参数:

color - the color to adjust

isDark - whether color is light or dark

lightnessMultiplier - the amount to modify the color e.g. 0.1f will alter it by 10%

返回:

the adjusted color

scrimify

public static int scrimify(int color,
           float lightnessMultiplier)