如何在Android上计算两个颜色整数与alpha通道叠加的结果

int alpha1 = Color.alpha(color1);
int red1 = Color.red(color1);
int green1 = Color.green(color1);
int blue1 = Color.blue(color1);

int alpha2 = Color.alpha(color2);
int red2 = Color.red(color2);
int green2 = Color.green(color2);
int blue2 = Color.blue(color2);

int alphaResult = (alpha1 + alpha2) / 2; // 取两个颜色alpha值的平均值
int redResult = (red1 * alpha1 + red2 * alpha2) / (2 * alphaResult); // 按照alpha值加权计算红色通道的叠加结果
int greenResult = (green1 * alpha1 + green2 * alpha2) / (2 * alphaResult); // 按照alpha值加权计算绿色通道的叠加结果
int blueResult = (blue1 * alpha1 + blue2 * alpha2) / (2 * alphaResult); // 按照alpha值加权计算蓝色通道的叠加结果

int colorResult = Color.argb(alphaResult, redResult, greenResult, blueResult);