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 "Next" button.



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

Step 3

Now, add an Empty Activity and click "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();
    }


}

Step 6

Now, either go to menu bar and click "Make project" or press ctrl+f9 to debug the error.

Step 7

Then, click "Run" button or press shift+f10 to run the project. Select the "Virtual Machine" option and click OK.



Conclusion

We have successfully created Email app for Android using Android Studio.