Helper.java 文件源码

@ColorInt
public static int getDarkerColor(@ColorInt int color, @FloatRange(from = 0.0D, to = 1.0D) float transparency) {
    float[] hsv = new float[3];
    Color.colorToHSV(color, hsv);
    hsv[2] *= transparency;
    return Color.HSVToColor(hsv);
}