用字符串中的波斯数字替换英文数字,​​URL除外

Question

我为波斯语字符串编写了一个自定义TextView,这个TextView应该将英文数字替换成波斯数字

public class PersianTextView extends TextView {

    public PersianTextView(Context context) {
        super(context);
    }

    public PersianTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public PersianTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public void setText(CharSequence text, BufferType type) {
        String t = text.toString();
        t = t.replaceAll("0", "?");
        t = t.replaceAll("1", "?");
        t = t.replaceAll("2", "?");
        t = t.replaceAll("3", "?");
        t = t.replaceAll("4", "?");
        t = t.replaceAll("5", "?");
        t = t.replaceAll("6", "?");
        t = t.replaceAll("7", "?");
        t = t.replaceAll("8", "?");
        t = t.replaceAll("9", "?");
        super.setText((CharSequence)t, type);
    }
}

此View工作正常,但如果我从HTML设置文本,包含英文数字的链接将不会显示为链接!什么是解决问题最简单的方法？

Answer 1

某种形式需要在链接上进行模式匹配.

private static final Pattern DIGIT_OR_LINK_PATTERN =
    Pattern.compile("(\\d|https?:[\\w_/+%?=&.]+)");
// Pattern:          (dig|link                 )

private static final Map<String, String> PERSIAN_DIGITS = new HashMap<>();
static {
   PERSIAN_DIGITS.put("0", "?");
   PERSIAN_DIGITS.put("1", "?");
   PERSIAN_DIGITS.put("2", "?");
   PERSIAN_DIGITS.put("3", "?");
   PERSIAN_DIGITS.put("4", "?");
   PERSIAN_DIGITS.put("5", "?");
   PERSIAN_DIGITS.put("6", "?");
   PERSIAN_DIGITS.put("7", "?");
   PERSIAN_DIGITS.put("8", "?");
   PERSIAN_DIGITS.put("9", "?");
}

public static String persianDigits(String s) {
    StringBuffer sb = new StringBuffer();
    Matcher m = DIGIT_OR_LINK_PATTERN.matcher(s);
    while (m.find()) {
        String t = m.group(1);
        if (t.length() == 1) {
            // Digit.
            t = PERSIAN_DIGITS.get(t);
        }
        m.appendReplacement(sb, t);
    }
    m.appendTail(sb);
    return sb.toString();
}

PS

根据文本的不同,最好只替换HTML标记之外的数字,即>和之间的数字<.

private static final Pattern DIGIT_OR_LINK_PATTERN =
    Pattern.compile("(\\d|<[^>]*>)",
        Pattern.DOTALL|Pattern.MULTILINE);