Android 将阿拉伯数字转换为英文数字

Question

我从 gps 得到以下错误：

Fatal Exception: java.lang.NumberFormatException
Invalid double: "-٣٣٫٩٣٨٧٤"

这是我通过 Fabric 从用户那里得到的一个错误。它看起来像阿拉伯语，所以我猜它只有在您将语言设置为该语言或您的 SIM 卡时才会发生？是否可以强制 gps 发送 0-9 范围内的字符？或者我能以某种方式解决这个问题吗？

Answer 1

试试这个：

String number = arabicToDecimal("۴۲"); // number = 42;

private static final String arabic = "\u06f0\u06f1\u06f2\u06f3\u06f4\u06f5\u06f6\u06f7\u06f8\u06f9";
private static String arabicToDecimal(String number) {
    char[] chars = new char[number.length()];
    for(int i=0;i<number.length();i++) {
        char ch = number.charAt(i);
        if (ch >= 0x0660 && ch <= 0x0669)
           ch -= 0x0660 - '0';
        else if (ch >= 0x06f0 && ch <= 0x06F9)
           ch -= 0x06f0 - '0';
        chars[i] = ch;
    }
    return new String(chars);
}

Answer 2

使用 Character.getNumericValue(char)

的更通用的解决方案

static String replaceNonstandardDigits(String input) {
    if (input == null || input.isEmpty()) {
        return input;
    }

    StringBuilder builder = new StringBuilder();
    for (int i = 0; i < input.length(); i++) {
        char ch = input.charAt(i);
        if (isNonstandardDigit(ch)) {
            int numericValue = Character.getNumericValue(ch);
            if (numericValue >= 0) {
                builder.append(numericValue);
            }
        } else {
            builder.append(ch);
        }
    }
    return builder.toString();
}

private static boolean isNonstandardDigit(char ch) {
    return Character.isDigit(ch) && !(ch >= '0' && ch <= '9');
}

Answer 3

修改后的通用解决方案


    fun convertArabic(arabicStr: String): String? {
        val chArr = arabicStr.toCharArray()
        val sb = StringBuilder()
        for (ch in chArr) {
            if (Character.isDigit(ch)) {
                sb.append(Character.getNumericValue(ch))
            }else if (ch == '٫'){
                sb.append(".")
            }

            else {
                sb.append(ch)
            }
        }
        return sb.toString()
    }

second 分支是 必要的 因为双数的这个字符是点 separator '٫'

Answer 4

Kotlin 开发者：

fun ArabicToEnglish(str: String):String {
        var result = ""
        var en = '0'
        for (ch in str) {
            en = ch
            when (ch) {
                '۰' -> en = '0'
                '۱' -> en = '1'
                '۲' -> en = '2'
                '۳' -> en = '3'
                '۴' -> en = '4'
                '۵' -> en = '5'
                '۶' -> en = '6'
                '۷' -> en = '7'
                '۸' -> en = '8'
                '۹' -> en = '9'
            }
            result = "${result}$en"
        }
        return result
    }

Answer 5

这是我的将英文数字转成阿拉伯数字的代码，解决方案可以优化，根据您的需要修改它，它适用于所有数字。

fun englishNumberToArabicNumber(number: Int): String {
    val arabicNumber = mutableListOf<String>()
    for (element in number.toString()) {
        when (element) {
            '1' -> arabicNumber.add("١")
            '2' -> arabicNumber.add("٢")
            '3' -> arabicNumber.add("٣")
            '4' -> arabicNumber.add("٤")
            '5' -> arabicNumber.add("٥")
            '6' -> arabicNumber.add("٦")
            '7' -> arabicNumber.add("٧")
            '8' -> arabicNumber.add("٨")
            '9' -> arabicNumber.add("٩")
            else -> arabicNumber.add("٠")
        }
    }
    return arabicNumber.toString()
        .replace("[", "")
        .replace("]", "")
        .replace(",", "")
        .replace(" ", "")


}

Answer 6

简单回答

NumberFormat.getInstance(Locale.getDefault()).format(123)

如果要针对特定语言进行设置

NumberFormat.getInstance(Locale.forLanguageTag("ar"))
NumberFormat.getInstance(Locale.ENGLISH)

Answer 7

这是 Kotlin 中的另一个“手动”解决方案。它可能不是性能方面的最佳解决方案。

val number: Double = "۱٬۲۳۴٫۵۶۷۸".parseToDouble()

/**
 * Parses any valid number string to a [Double].
 * The number can be in Persian/Urdu, Eastern Arabic, or Westerns Arabic numerals.
 * The number can have thousands separators (Persian/Urdu/Eastern Arabic `٬` or English `,` or others).
 * The number can be a mix of the above; for example,
 * it can have Persian numerals, [thin space](https://en.wikipedia.org/wiki/Thin_space) ` ` as thousands separator, and point `.` as decimal separator.
 *
 * Also see [this Wikipedia article](https://en.wikipedia.org/wiki/Arabic_script_in_Unicode)
 */
fun String.parseToDouble() = this
        .normalizeDigits()
        .normalizeDecimalSeparator()
        .removeOptionalCharacters()
        .toDouble()

/**
 * Converts [Persian/Urdu and Eastern Arabic digits](https://en.wikipedia.org/wiki/Eastern_Arabic_numerals#Numerals) to Western Arabic digits
 */
fun String.normalizeDigits() = this
        // Replace Persian/Urdu numerals
        .replace(Regex("[۰-۹]")) { match -> (match.value.single() - '۰').toString() }
        // Replace Eastern Arabic numerals
        .replace(Regex("[٠-٩]")) { match -> (match.value.single() - '٠').toString() }

/**
 * Converts [Persian/Urdu/Eastern Arabic decimal separator](https://en.wikipedia.org/wiki/Decimal_separator#Other_numeral_systems) `٫` or slash `/` (invalid and non-standard) to `.` (decimal separator in English)
 */
fun String.normalizeDecimalSeparator() = this.replace('٫', '.').replace('/', '.')

/**
 * Removes everything except Western Arabic digits and point `.` (for example, thousands separators)
 */
fun String.removeOptionalCharacters() = this.replace(Regex("[^\d.]"), "")

请参阅 this Wikipedia article 以了解数字之间的差异。

Answer 8

Kotlin 中只有 6 行

val ar = "-٣٣٫٩٣٨٧٤"

val en = ar.map {
    if (it.code in 1632..1641) (it.code - 1632 + 48).toChar()
    else it
}.joinToString("")

这里，1632 & 1641 分别是 0(zero) & 9(nine) 的阿拉伯语值。

Android 将阿拉伯数字转换为英文数字

Android convert Arabic number to English Number

gps

android

arabic

coordinates

numberformatexception

Kotlin 中只有 6 行