Android在EditText上的电子邮件验证 [英] Android Email Validation on EditText

问题描述

我有一个edittext，我想在Editttext中编写电子邮件验证 这是一个xml代码

I have one edittext and I would to to write email validation in my Editttext this is a xml code

<EditText
        android:id="@+id/mail"
        android:layout_width="match_parent"
        android:layout_height="48dp"
        android:layout_alignLeft="@+id/phone"
        android:layout_below="@+id/phone"
        android:layout_marginRight="33dp"
        android:layout_marginTop="10dp"
        android:background="@drawable/edit_background"
        android:ems="10"
        android:hint="E-Mail"
        android:inputType="textEmailAddress"
        android:paddingLeft="20dp"
        android:textColor="#7e7e7e"
        android:textColorHint="#7e7e7e" >
</EditText>

这是一个Java代码

emailInput = mail.getText().toString().trim();

emailPattern = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";

if (emailInput.matches(emailPattern)) {
    Toast.makeText(getActivity(), "valid email address", Toast.LENGTH_SHORT).show();
} else {
    Toast.makeText(getActivity(), "Invalid email address", Toast.LENGTH_SHORT).show();
    mail.setBackgroundResource(R.drawable.edit_red_line);
}

我无法验证.吐司消息始终为无效的电子邮件地址". 我在做什么错了?

I can't validation. The toast message is always "Invalid email address". What am I doing wrong?

推荐答案

为什么不使用:

public final static boolean isValidEmail(CharSequence target) {
  return !TextUtils.isEmpty(target) && android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches();
}

根据建议此处.

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