Android Utililty Methods Color Blend

List of utility methods to do Color Blend

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Description

The list of methods to do Color Blend are organized into topic(s).

Method

intscreenBlendTwoColors(int c1, int c2)
Blend of color c1 and c2 by applying f(c1, c2) = 1 - (1 - c1) * (1 - c2) per channel. 
double a1 = Color.alpha(c1) / ((double) CHANNEL_MAX);
double r1 = Color.red(c1) / ((double) CHANNEL_MAX);
double g1 = Color.green(c1) / ((double) CHANNEL_MAX);
double b1 = Color.blue(c1) / ((double) CHANNEL_MAX);
double a2 = Color.alpha(c2) / ((double) CHANNEL_MAX);
double r2 = Color.red(c2) / ((double) CHANNEL_MAX);
double g2 = Color.green(c2) / ((double) CHANNEL_MAX);
double b2 = Color.blue(c2) / ((double) CHANNEL_MAX);
...
int[]createGrayGradient1()
create Gray Gradient 
int[] c = new int[3];
int f = -20;
c[0] = toARGB(255, 90 + f, 90 + f, 90 + f);
c[1] = toARGB(255, 80 + f, 80 + f, 80 + f);
c[2] = toARGB(255, 70 + f, 70 + f, 70 + f);
return c;
int[]createGrayGradient2()
create Gray Gradient 
int[] c = new int[3];
int f = -40;
c[0] = toARGB(255, 190 + f, 190 + f, 190 + f);
c[1] = toARGB(255, 185 + f, 185 + f, 185 + f);
c[2] = toARGB(255, 160 + f, 160 + f, 160 + f);
return c;
int[]createGrayGradient3()
create Gray Gradient 
int[] c = new int[3];
int f = -40;
c[0] = toARGB(0, 160 + f, 160 + f, 160 + f);
c[1] = toARGB(255, 185 + f, 185 + f, 185 + f);
c[2] = toARGB(0, 160 + f, 160 + f, 160 + f);
return c;
int[]createGreenGradient()
create Green Gradient 
int[] colorArray = new int[5];
int alpha = 160;
colorArray[0] = toARGB(alpha, 0, 95, 0);
colorArray[1] = toARGB(alpha, 0, 95, 0);
colorArray[2] = toARGB(alpha, 0, 110, 0);
colorArray[3] = toARGB(alpha, 0, 115, 0);
colorArray[4] = toARGB(alpha, 0, 120, 0);
return colorArray;
...
ColorMatrixColorFiltercreateRGBColorFilter(int red, int green, int blue)
create RGB Color Filter 
final float[] array = new float[] { 0, 0, 0, 0, red, 0, 0, 0, 0,
        green, 0, 0, 0, 0, blue, 0, 0, 0, 1, 0 };
return new ColorMatrixColorFilter(array);
ColorMatrixColorFiltercreateRGBColorFilter(int red, int green, int blue, float alpha)
create RGB Color Filter 
final float[] array = new float[] { 0, 0, 0, 0, red, 0, 0, 0, 0,
        green, 0, 0, 0, 0, blue, 0, 0, 0, alpha, 0 };
return new ColorMatrixColorFilter(array);
ColorMatrixColorFiltercreateColorChangeFilter( int newColor)
create Color Change Filter 
final int r = (newColor >> 16) & 255;
final int g = (newColor >> 8) & 255;
final int b = newColor & 255;
float rRatio = ((float) r) / 255.0f;
float gRatio = ((float) g) / 255.0f;
float bRatio = ((float) b) / 255.0f;
final float[] array = new float[] { rRatio, 0, 0, 0, 0, 0, gRatio,
        0, 0, 0, 0, 0, bRatio, 0, 0, 0, 0, 0, 1, 0 };
...
ColorMatrixColorFiltercreateColorFilterByAlpha( float alpha)
create Color Filter By Alpha 
final float[] array = new float[] { 1, 0, 0, 0, 0, 0, 1, 0, 0, 0,
        0, 0, 1, 0, 0, 0, 0, 0, alpha, 0 };
return new ColorMatrixColorFilter(array);
ColorMatrixColorFiltercreateColorFilterByColor(int color)
create Color Filter By Color 
final int r = (color >> 16) & 255;
final int g = (color >> 8) & 255;
final int b = color & 255;
final float[] array = new float[] { 0, 0, 0, 0, r, 0, 0, 0, 0, g,
        0, 0, 0, 0, b, 0, 0, 0, 1, 0 };
return new ColorMatrixColorFilter(array);