how to check email address is valid or not in android example

how to check email address is valid or not in android example.

In this article today learn how to check email address is valid or not in android example. we will see different methods to validate email address entered through EditText using android layout xml file. Email validation is useful in android because we need to send the email to server for registering a new account or for any other purpose.

Follow the method how to check email address is valid or not in android:

Declaire a variable:

String emailPattern = "[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+";

Then the button click event part declaired:

button.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                if(emailId.getText().toString().isEmpty()) {

                    Toast.makeText(getApplicationContext(),"enter email address",Toast.LENGTH_SHORT).show();

                }else {

                    if (emailId.getText().toString().trim().matches(emailPattern)) {

                        Toast.makeText(getApplicationContext(),"valid email address",Toast.LENGTH_SHORT).show();

                    } else {

                        Toast.makeText(getApplicationContext(),"Invalid email address", Toast.LENGTH_SHORT).show();

                    }

                }

            }

        });

Follow the full source code how to check email address is valid or not in android:

1.MainActivity.java:

package com.akash.emailvalidaton;

import androidx.appcompat.app.AppCompatActivity;

import android.content.res.Configuration;

import android.os.Build;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    int view = R.layout.activity_main;

    Button button;

    EditText emailId;

    String emailPattern = "[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+";

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        button = findViewById(R.id.text);

        emailId = findViewById(R.id.emailId);

        button.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                if(emailId.getText().toString().isEmpty()) {

                    Toast.makeText(getApplicationContext(),"enter email address",Toast.LENGTH_SHORT).show();

                }else {

                    if (emailId.getText().toString().trim().matches(emailPattern)) {

                        Toast.makeText(getApplicationContext(),"valid email address",Toast.LENGTH_SHORT).show();

                    } else {

                        Toast.makeText(getApplicationContext(),"Invalid email address", Toast.LENGTH_SHORT).show();

                    }

                }

            }

        });

    }

}

2.activity_main.xml:

<?xml version = "1.0" encoding = "utf-8"?>

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

    android:id = "@+id/parent"

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

    android:layout_width = "match_parent"

    android:layout_height = "match_parent"

    tools:context = ".MainActivity"

    android:gravity = "center"

    android:orientation = "vertical">

    <EditText

        android:id = "@+id/emailId"

        android:hint = "Enter Email id"

        android:layout_margin = "20dp"

        android:layout_width = "match_parent"

        android:layout_height = "wrap_content" />

    <Button

        android:id = "@+id/text"

        android:textSize = "18sp"

        android:textAlignment = "center"

        android:layout_width = "wrap_content"

        android:textColor = "#000"

        android:text = "Check validation"

        android:layout_height = "wrap_content" />

</LinearLayout>

3.AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

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

    package="com.akash.emailvalidaton">

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

4.string.xml:

<resources>

    <string name="app_name">email validaton</string>

</resources>

5.style.xml:

<resources>

    <!-- Base application theme. -->

    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

        <!-- Customize your theme here. -->

        <item name="colorPrimary">@color/colorPrimary</item>

        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>

        <item name="colorAccent">@color/colorAccent</item>

    </style>

</resources>

6.Output: