The colorpickview from droidxz

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Unable to select white color

How to select white color

如果需要添加透明度

需要
修改getColor方法

     * 获取某个百分比位置的颜色
     * @param radio 取值[0,1]
     * @return color
     */
    fun getColor(radio: Float, colorArr: IntArray, positionArr: FloatArray): Int {
        val startColor: Int
        val endColor: Int
        if (radio >= 1) {
            return getColorFrom(
                mAlpha,
                colorArr[colorArr.size - 1],
                colorArr[colorArr.size - 1],
                1f
            )
        }
        for (i in positionArr.indices) {
            if (radio <= positionArr[i]) {
                if (i == 0) {
                    return getColorFrom(mAlpha, colorArr[0], colorArr[0], 0f)
                }
                startColor = colorArr[i - 1]
                endColor = colorArr[i]
                val areaRadio: Float = getAreaRadio(radio, positionArr[i - 1], positionArr[i])
                return getColorFrom(mAlpha, startColor, endColor, areaRadio)
            }
        }
        return -1
    }

getColorFrom方法

  /**
     * 取两个颜色间的渐变区间 中的某一点的颜色
     * @param startColor s
     * @param endColor e
     * @param radio r
     * @return color
     */
    fun getColorFrom(alpha: Double, startColor: Int, endColor: Int, radio: Float): Int {
        val redStart = Color.red(startColor)
        val blueStart = Color.blue(startColor)
        val greenStart = Color.green(startColor)
        val redEnd = Color.red(endColor)
        val blueEnd = Color.blue(endColor)
        val greenEnd = Color.green(endColor)
        val red = (redStart + ((redEnd - redStart) * radio + 0.5)).toInt()
        val greed = (greenStart + ((greenEnd - greenStart) * radio + 0.5)).toInt()
        val blue = (blueStart + ((blueEnd - blueStart) * radio + 0.5)).toInt()
        val alpha = Math.round(Math.round(alpha * 100) / 100.0 * 255).toInt()
        return Color.argb(255 - alpha, red, greed, blue)
    }```

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