It's

int color =  Color.parseColor("colorstring");

Try:

myLayout.setBackgroundColor(Color.parseColor("#636161"));

It's

int color =  Color.parseColor("colorstring");

在Xamarin的 使用这个

Control.SetBackgroundColor(global::Android.Graphics.Color.ParseColor("#F5F1F1"));

将该字符串转换为可用于setBackgroundColor和setTextColor的int颜色

String string = "#FFFF0000";
int color = Integer.parseInt(string.replaceFirst("^#",""), 16);

16表示它是十六进制，而不是常规的0-9。结果应该是一样的

int color = 0xFFFF0000;

我已经创建了一个完整的答案:

    /**
     * Input: Hex Value of ARGB, eg: "#FFFF00FF", "#FF00FF", "#F0F"
     * Output:  Float Color Array with  with red, green,
     * blue and alpha (opacity) values,
     * eg:  floatArrayOf(0.63671875f, 0.76953125f, 0.22265625f, 1.0f)
     */
    private fun getFloatArrayFromARGB(argb: String): FloatArray {
        val colorBase: Int = if (argb.length == 4) {
            val red = if (argb[1] == '0') 0 else 255
            val green = if (argb[2] == '0') 0 else 255
            val blue = if (argb[3] == '0') 0 else 255
            Color.rgb(red, green, blue)
        } else {
            Color.parseColor(argb)
        }
        val red = Color.red(colorBase)
        val green = Color.green(colorBase)
        val blue = Color.blue(colorBase)
        val alpha = Color.alpha(colorBase)
        return floatArrayOf(
            red / 255f,
            green / 255f,
            blue / 255f,
            alpha / 255f
        )
    }

用法:

   private val colorValue = getFloatArrayFromARGB("#F0F")

希望它能帮助到别人