rgb-hsv-hsl-android.java

public class ColorUtility{

//RGB->HSL算法來源：http://blog.csdn.net/idfaya/article/details/6770414

static float[] colorToHsl(int color) {

float h = 0, s = 0, l = 0;

float r = Color.red(color) / 255f;

float g = Color.green(color) / 255f;

float b = Color.blue(color) / 255f;

float max = Math.max(Math.max(r,g), b);

float min = Math.min(Math.min(r,g), b);

if(max == min)

h = 0;

else if((max == r) && (g >= b))

h = 60 * (g - b) / (max - min);

else if((max == r) && (g < b))

h = 60 * (g - b) / (max - min) + 360;

else if(max == g)

h = 60 * (b - r) / (max - min) + 120;

else if(max == b)

h = 60 * (r - g) / (max - min) + 240;

l = (max + min) / 2;

if((l == 0) || (max == min))

s = 0;

else if((l > 0) && (l <= 1/2))

s = (max - min) / (max + min);

else if(l > 1/2)

s = (max - min) / (2 - (max+min));

return new float[]{h, s, l};

}

public static void setColor(int color) {

float hsv[] = new float[3];

Color.colorToHSV(color, hsv);

float hsl[] = colorToHsl(color);

Log.i("light", String.format("r,g,b = %3d,%3d,%3d; h,s,v = %.2f,%.2f,%.2f; h,s,l = %.2f,%.2f,%.2f", Color.red(color), Color.green(color), Color.blue(color), hsv[0], hsv[1], hsv[2], hsl[0], hsl[1], hsl[2]));

}

}

總結

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