颜色渐变实用获取色值方法

来源：互联网发布：sql minus 但不去重编辑：程序博客网时间：2024/05/04 22:33

/** * 计算渐变颜色值 ARGB *  * @param fraction *            变化比率 0~1 * @param startValue *            初始色值 * @param endValue *            结束色值 * @return */private Integer evaluate(float fraction, Object startValue, Integer endValue) {int startInt = (Integer) startValue;int startA = (startInt >> 24) & 0xff;int startR = (startInt >> 16) & 0xff;int startG = (startInt >> 8) & 0xff;int startB = startInt & 0xff;int endInt = (Integer) endValue;int endA = (endInt >> 24) & 0xff;int endR = (endInt >> 16) & 0xff;int endG = (endInt >> 8) & 0xff;int endB = endInt & 0xff;return (int) ((startA + (int) (fraction * (endA - startA))) << 24)| (int) ((startR + (int) (fraction * (endR - startR))) << 16)| (int) ((startG + (int) (fraction * (endG - startG))) << 8)| (int) ((startB + (int) (fraction * (endB - startB))));}

使用方法很简单:

int color = evaluate(0.5f, Color.BLACK, Color.WHITE);

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