我想验证在 EditText 中引入的电子邮件以及我已经拥有的代码:
I want to validate an email introduced inside an EditText and this the code that I already have:
最终的 EditText textMessage = (EditText)findViewById(R.id.textMessage);
final EditText textMessage = (EditText)findViewById(R.id.textMessage);
最终 TextView 文本 = (TextView)findViewById(R.id.text);
final TextView text = (TextView)findViewById(R.id.text);
textMessage.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
if (textMessage.getText().toString().matches("[a-zA-Z0-9._-]+@[a-z]+.[a-z]+") && s.length() > 0)
{
text.setText("valid email");
}
else
{
text.setText("invalid email");
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
public void onTextChanged(CharSequence s, int start, int before, int count) {}
});
问题是,当我在@"之后引入 3 个字符时,它会出现消息有效电子邮件",而当我引入完整的电子邮件时它必须出现.
The problem is that when I introduce 3 characters after the "@", it appears the message "valid email", when it must appear when I introduce the complete email.
有什么建议吗?
谢谢大家!
只要改变你的正则表达式如下:
Just change your regular expression as follows:
"[a-zA-Z0-9._-]+@[a-z]+\.+[a-z]+"
因为 .(dot) 表示匹配任何单字符.在您的点之前添加一个双反斜杠以代表一个真正的点.
Because . (dot) means match any single-char.ADD a double backslash before your dot to stand for a real dot.
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