Question

我必须像这样做验证如何实现它。

大型大写字母中应包含5个字母，后跟4个大写字母后跟1个大写字母（例如 - KLMNO5661P）

Answer 1

您可以使用RegEX（正则表达式）检查格式

String s = "ABCDE1234F"; // get your editext value here
Pattern pattern = Pattern.compile("[A-Z]{5}[0-9]{4}[A-Z]{1}");

Matcher matcher = pattern.matcher(s);
// Check if pattern matches 
if (matcher.matches()) {
  Log.i("Matching","Yes");
}   

[A-Z]{5} - match five literals which can be A to Z
[0-9]{4} - followed by 4 numbers 0 to 9
[A-Z]{1} - followed by one literal which can A to Z

Answer 2

试试这个

final String pan_pattern = "(([A-Za-z]{5})([0-9]{4})([a-zA-Z]))";

checkpan.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {

        Pattern r = Pattern.compile(pan_pattern);
        if (!regex_matcher(r, pan_number.getText().toString())) {
            error = "Invalid PAN number";
        }
    }
});

<强> regex_matcher

private boolean regex_matcher(Pattern pattern, String string) {
    Matcher m = pattern.matcher(string);
    return m.find() && (m.group(0) != null);
}

Android中的Pan Card验证

2 个答案: