Question

大家好我想把关注者数量转换为像Instagram这样的可读字符串。为此，我使用下面的代码：

public static String new_format(double number)
{
    String[] suffix = new String[]{"","K", "M", "B", "T"};
    int MAX_LENGTH = 4;
    String r = new DecimalFormat("##0E0").format(number);
    r = r.replaceAll("E[0-9]", suffix[Character.getNumericValue(r.charAt(r.length() - 1)) / 3]);
    while(r.length() > MAX_LENGTH || r.matches("[0-9]+\\.[a-z]"))
    {
        r = r.substring(0, r.length()-2) + r.substring(r.length() - 1);
    }
    return r;
}

但它没有给出正确的价值，例如lelepons有24.2米粉丝，但它显示了20米。我从这里获得了这段代码https://stackoverflow.com/a/49405728/9565955

Answer 1

public String formatValue(double value) {
int power; 
    String suffix = " kmbt";
    String formattedNumber = "";

    NumberFormat formatter = new DecimalFormat("#,###.#");
    power = (int)StrictMath.log10(value);
    value = value/(Math.pow(10,(power/3)*3));
    formattedNumber=formatter.format(value);
    formattedNumber = formattedNumber + suffix.charAt(power/3);
    return formattedNumber.length()>4 ?  formattedNumber.replaceAll("\\.[0-9]+", "") : formattedNumber;  
}

在OnCreateView中调用此方法来设置此方法的返回值

userfollower.setText(formatValue(number));

以可读形式转换数字值？

1 个答案: