Color mixing in android
See ArgbEvaluator (since API 11) http://developer.android.com/reference/android/animation/ArgbEvaluator.html
An alternative answer:
You can mix the bits in the hexs:
public static int mixTwoColors( int color1, int color2, float amount )
{
final byte ALPHA_CHANNEL = 24;
final byte RED_CHANNEL = 16;
final byte GREEN_CHANNEL = 8;
final byte BLUE_CHANNEL = 0;
final float inverseAmount = 1.0f - amount;
int a = ((int)(((float)(color1 >> ALPHA_CHANNEL & 0xff )*amount) +
((float)(color2 >> ALPHA_CHANNEL & 0xff )*inverseAmount))) & 0xff;
int r = ((int)(((float)(color1 >> RED_CHANNEL & 0xff )*amount) +
((float)(color2 >> RED_CHANNEL & 0xff )*inverseAmount))) & 0xff;
int g = ((int)(((float)(color1 >> GREEN_CHANNEL & 0xff )*amount) +
((float)(color2 >> GREEN_CHANNEL & 0xff )*inverseAmount))) & 0xff;
int b = ((int)(((float)(color1 & 0xff )*amount) +
((float)(color2 & 0xff )*inverseAmount))) & 0xff;
return a << ALPHA_CHANNEL | r << RED_CHANNEL | g << GREEN_CHANNEL | b << BLUE_CHANNEL;
}
SlidingTabStrip has really useful method for blending colors, looks great when used with ViewPager:
private static int blendColors(int color1, int color2, float ratio) {
final float inverseRation = 1f - ratio;
float r = (Color.red(color1) * ratio) + (Color.red(color2) * inverseRation);
float g = (Color.green(color1) * ratio) + (Color.green(color2) * inverseRation);
float b = (Color.blue(color1) * ratio) + (Color.blue(color2) * inverseRation);
return Color.rgb((int) r, (int) g, (int) b);
}
Since April 2015 you can use blendARGB method from v4 support library:
int resultColor = ColorUtils.blendARGB(color1, color2, 0.5F);
Ratio value has to be 0.5 to achive even mix.