电话号码验证机器人 [英] Phone number validation Android

问题描述

如何查询电话号码是有效或不。含有高达长度13和包括字符+前方。

How to check phone number is valid or not. containing upto length 13 and including character + infront.

如何做到这一点？

我尝试这样做：

String regexStr = "^[0-9]$";

            String number=entered_number.getText().toString();


             if(entered_number.getText().toString().length()<10 || number.length()>13 || number.matches(regexStr)==false  ) {
                Toast.makeText(MyDialog.this,"Please enter "+"\n"+" valid phone number",Toast.LENGTH_SHORT).show();
               // am_checked=0;
            }`

和也试过这样的：

 public boolean isValidPhoneNumber(String number)
 {
     for (char c : number.toCharArray())
     {
         if (!VALID_CHARS.contains(c))
         {
            return false;
         }
     }

     // All characters were valid
     return true;
 }

这两个不工作。

Both not working.

输入类型： +号被接受，从0到9的数字和长度B / W 10-13和SHLD不Accpet头其他字符

推荐答案

给你指定的规则：

高达长度13和包括字符+前方。

upto length 13 and including character + infront.

（也结合了最小长度10在code）

(and also incorporating the min length of 10 in your code)

你会希望有一个正则表达式是这样的：

You're going to want a regex that looks like this:

^\+[0-9]{10,13}$

通过最小和最大长度EN codeD中的正则表达式，你可以将这些条件从如果（）块。

With the min and max lengths encoded in the regex, you can drop those conditions from your if() block.

题外话：我建议范围为10 - 13太限制了一个国际电话号码字段;你几乎一定会找到有效的数字是两个比这更长和更短。我建议了一系列的8 - 20是安全的。

Off topic: I'd suggest that a range of 10 - 13 is too limiting for an international phone number field; you're almost certain to find valid numbers that are both longer and shorter than this. I'd suggest a range of 8 - 20 to be safe.

OP指出上述正则表达式不因转义序列的工作。不知道为什么，但更好的方法是：

OP states the above regex doesn't work due to the escape sequence. Not sure why, but an alternative would be:

^[+][0-9]{10,13}$

OP现在增加了 + 标志应该是可选的。在这种情况下，正则表达式需要经过一个问号 + ，所以上面的例子，现在是这样的：

OP now adds that the + sign should be optional. In this case, the regex needs a question mark after the +, so the example above would now look like this:

^[+]?[0-9]{10,13}$

这篇关于电话号码验证机器人的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！