Android中英文截取显示字符个数

截取显示的字符个数

public static String subStringCN(final String str, final int maxLength) {
        if (str == null) {
            return str;
        }
        String suffix = "...";
        int suffixLen = suffix.length();
        final StringBuffer sbuffer = new StringBuffer();
        final char[] chr = str.trim().toCharArray();
        int len = 0;
        for (int i = 0; i < chr.length; i++) {
            if (chr[i] >= 0xa1) {
                len += 2;
            } else {
                len++;
            }
        }

        if(len<=maxLength){
            return str;
        }
        len = 0;
        for (int i = 0; i < chr.length; i++) {
            if (chr[i] >= 0xa1) {
                len += 2;
                if (len + suffixLen > maxLength) {
                    break;
                }else {
                    sbuffer.append(chr[i]);
                }
            } else {
                len++;
                if (len + suffixLen > maxLength) {
                    break;
                }else {
                    sbuffer.append(chr[i]);
                }
            }
        }
        sbuffer.append(suffix);
        return sbuffer.toString();
    }