Create Email Android Application

Introduction

Android is one of the most popular operating systems for mobiles. In this article, I will show you how to create an Email Android application using Android Studio.

Requirements

Android Studio version 2.3.3
Little bit XML and JAVA knowledge.
Android Emulator (or) Android mobile
Download link (Android Studio)

Steps to be followed

Follow these steps to create a native Email Android application using Android Studio. I have attached the source code too with this article.

Step 1

Open Android Studio and start a new Android Studio project.

Step 2

Choose your application name and choose where your project is stored at the location. If you wish to use C++ for coding the project, mark the "Include C++ support" checkbox, and click the "Next" button.

Now, select the version of Android and select the target Android devices.

Step 3

Now, add an Empty Activity and click the "Next" button.

Add the Activity name and click "Finish".

Step 4

Go to activity_contact_form.xml. This XML file contains the designing code for an Android app.

The XML code is given below.

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="abu.contactform.ContactActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="3dp"
android:text="@string/contact_form_name"
android:textAllCaps="true"
android:textColor="@color/colorPrimary"
android:textSize="12sp" />
<EditText
android:id="@+id/your_name"
android:layout_width="fill_parent"
android:layout_height="38dp"
android:layout_marginBottom="20dp"
android:inputType="text"
android:singleLine="true"
android:textSize="14sp" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="3dp"
android:text="@string/contact_form_email"
android:textAllCaps="true"
android:textColor="@color/colorPrimary"
android:textSize="12sp" />
<EditText
android:id="@+id/your_email"
android:layout_width="fill_parent"
android:layout_height="38dp"
android:layout_marginBottom="20dp"
android:inputType="textEmailAddress"
android:singleLine="true"
android:textSize="14sp" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="3dp"
android:text="@string/contact_form_subject"
android:textAllCaps="true"
android:textColor="@color/colorPrimary"
android:textSize="12sp" />
<EditText
android:id="@+id/your_subject"
android:layout_width="fill_parent"
android:layout_height="38dp"
android:layout_marginBottom="20dp"
android:inputType="text"
android:singleLine="true"
android:textSize="14sp" />
<TextView
android:layout_width="fill_parent"
android:layout_height="32dp"
android:paddingLeft="3dp"
android:text="@string/contact_form_message"
android:textAllCaps="true"
android:textColor="@color/colorPrimary"
android:textSize="12sp" />
<EditText
android:id="@+id/your_message"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:height="180dp"
android:gravity="top"
android:inputType="textMultiLine"
android:textSize="14sp" />
<Button
android:id="@+id/post_message"
android:layout_width="wrap_content"
android:layout_height="32dp"
android:layout_gravity="center"
android:background="@color/colorPrimary"
android:paddingBottom="1dp"
android:paddingLeft="15dp"
android:paddingRight="15dp"
android:paddingTop="1dp"
android:text="@string/contact_form_button"
android:textAllCaps="true"
android:textColor="@android:color/white"
android:textSize="13sp" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>

Step 5

Go to App ⇒ Res ⇒values⇒String.xml.

The string XML code

<resources>
<string name="contact_form">Contact Us</string>
<string name="contact_form_name">Your Name</string>
<string name="contact_form_email">Your Email</string>
<string name="contact_form_subject">Subject</string>
<string name="contact_form_message">Message</string>
<string name="contact_form_button">Send Message</string>
<string name="contact_form_post_message">Please wait! We\'re sending your message to the support department...</string>
<string name="contact_posted">Your message has been successfully delivered.</string>
<string name="app_name">contact form</string>
</resources>

Step 6

Go to MainActivity.java. This Java program is that of Android. Add the following code.

package abu.contactform;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import abu.contactform.R;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ContactActivity extends AppCompatActivity {
private Activity activity;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_contact_form);
final EditText your_name = (EditText) findViewById(R.id.your_name);
final EditText your_email = (EditText) findViewById(R.id.your_email);
final EditText your_subject = (EditText) findViewById(R.id.your_subject);
final EditText your_message = (EditText) findViewById(R.id.your_message);
Button email = (Button) findViewById(R.id.post_message);
email.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String name = your_name.getText().toString();
String email = your_email.getText().toString();
String subject = your_subject.getText().toString();
String message = your_message.getText().toString();
if (TextUtils.isEmpty(name)) {
your_name.setError("Enter Your Name");
your_name.requestFocus();
return;
}
Boolean onError = false;
if (!isValidEmail(email)) {
onError = true;
your_email.setError("Invalid Email");
return;
}
if (TextUtils.isEmpty(subject)) {
your_subject.setError("Enter Your Subject");
your_subject.requestFocus();
return;
}
if (TextUtils.isEmpty(message)) {
your_message.setError("Enter Your Message");
your_message.requestFocus();
return;
}
Intent sendEmail = new Intent(android.content.Intent.ACTION_SEND);
/* Fill it with Data */
sendEmail.setType("plain/text");
sendEmail.putExtra(android.content.Intent.EXTRA_EMAIL, new String[] {
"[email protected]"
});
sendEmail.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
sendEmail.putExtra(android.content.Intent.EXTRA_TEXT,
"name:" + name + '\n' + "Email ID:" + email + '\n' + "Message:" + '\n' + message);
/* Send it off to the Activity-Chooser */
startActivity(Intent.createChooser(sendEmail, "Send mail..."));
}
});
}
@Override
public void onResume() {
super.onResume();
//Get a Tracker (should auto-report)
}
@Override
protected void onStart() {
super.onStart();
}
@Override
protected void onStop() {
super.onStop();
}
// validating email id
private boolean isValidEmail(String email) {
String EMAIL_PATTERN = "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@" +
"[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
Pattern pattern = Pattern.compile(EMAIL_PATTERN);
Matcher matcher = pattern.matcher(email);
return matcher.matches();
}
}