Email Pattern Validate

This code snippet shows how you can validate the format of an email address. If the email pattern is valid, there is no message.

Code Snippet

import android.app.Activity;

import android.os.Bundle;

import android.text.TextUtils;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

public class MainActivity extends Activity {

Button btn_validate;

EditText et_email;

String emailAddress;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

btn_validate = (Button) findViewById(R.id.btn_validate);

et_email = (EditText) findViewById(R.id.et_email);

btn_validate.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

emailAddress = et_email.getText().toString();

if (!android.util.Patterns.EMAIL_ADDRESS.matcher(emailAddress).matches() | TextUtils.isEmpty(emailAddress)) {

et_email.setError("Invalid Email");

et_email.requestFocus();

}

}

});

}

}

XML Layout

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical" >

<TextView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginBottom="15dp"

android:layout_marginLeft="15dp"

android:layout_marginRight="15dp"

android:layout_marginTop="15dp"

android:text="@string/validate_email"

android:textSize="15sp" />

<EditText

android:id="@+id/et_email"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginBottom="15dp"

android:layout_marginLeft="15dp"

android:layout_marginRight="15dp"

android:layout_marginTop="15dp"

android:hint="@string/enter_email_address"

android:inputType="textEmailAddress"

android:textSize="15sp" />

<Button

android:id="@+id/btn_validate"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginBottom="15dp"

android:layout_marginLeft="15dp"

android:layout_marginRight="15dp"

android:layout_marginTop="15dp"

android:text="@string/ok"

android:textSize="15sp" />

</LinearLayout>

Note: If in a smartphone the email error message does not display you can set this instead of a string value:

Html.fromHtml("<font color='black'>Invalid Email Format!</font>")