java - 将颜色 RGB 转换为 HEX(整数结果)

Question

我创建了一个将三个整数值转换为十六进制值(字符串)的方法，如下所示(PS:尚未测试):

protected String convertRGBToHex(int r, int g, int b) {

    String rFString, rSString, gFString, gSString, bFString, bSString, result;
    int red, green, blue;
    int rred, rgreen, rblue;

    red = r / 16;
    rred = r % 16;

    if (red == 10) rFString = "A";
    else if (red == 11) rFString = "B";
    else if (red == 12) rFString = "C";
    else if (red == 13) rFString = "D";
    else if (red == 14) rFString = "E";
    else if (red == 15) rFString = "F";
    else rFString = String.valueOf(red);

    if (rred == 10) rSString = "A";
    else if (rred == 11) rSString = "B";
    else if (rred == 12) rSString = "C";
    else if (rred == 13) rSString = "D";
    else if (rred == 14) rSString = "E";
    else if (rred == 15) rSString = "F";
    else rSString = String.valueOf(rred);

    rFString = rFString + rSString;

    green = g / 16;
    rgreen = g % 16;

    if (green == 10) gFString = "A";
    else if (green == 11) gFString = "B";
    else if (green == 12) gFString = "C";
    else if (green == 13) gFString = "D";
    else if (green == 14) gFString = "E";
    else if (green == 15) gFString = "F";
    else gFString = String.valueOf(green);

    if (rgreen == 10) gSString = "A";
    else if (rgreen == 11) gSString = "B";
    else if (rgreen == 12) gSString = "C";
    else if (rgreen == 13) gSString = "D";
    else if (rgreen == 14) gSString = "E";
    else if (rgreen == 15) gSString = "F";
    else gSString = String.valueOf(rgreen);

    gFString = gFString + gSString;

    blue = b / 16;
    rblue = b % 16;

    if (blue == 10) bFString = "A";
    else if (blue == 11) bFString = "B";
    else if (blue == 12) bFString = "C";
    else if (blue == 13) bFString = "D";
    else if (blue == 14) bFString = "E";
    else if (blue == 15) bFString = "F";
    else bFString = String.valueOf(blue);

    if (rblue == 10) bSString = "A";
    else if (rblue == 11) bSString = "B";
    else if (rblue == 12) bSString = "C";
    else if (rblue == 13) bSString = "D";
    else if (rblue == 14) bSString = "E";
    else if (rblue == 15) bSString = "F";
    else bSString = String.valueOf(rblue);

    bFString = bFString + bSString;

    result = "#" + rFString + gFString + bFString;

    return result;

}

我的问题是:有没有一种方法可以将这个字符串结果转换为一个 int 值，我可以这样使用:

view.setBackgroundColor(0xF82619);

或者有一种方法可以将字符串转换为 int 并执行此操作(不会崩溃):

view.setBackgroundColor(result);

谢谢!

Answer 1

要得到一个整数你可以这样做

int col = (0xff << 24) | ((r&0xff) << 16) | ((g&0xff) << 8) | (b&0xff);

更简单的是:

int col = Color.rgb(r, g, b);