Send Email Using Intent - Android Studio - Kotlin

In this example, we will send email using intent. See the following example:

activity_main.xml

Add the following code in the activity_main.xml file.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    android:layout_margin="15dp"
    tools:context=".MainActivity">

        <EditText
            android:id="@+id/edt_email_to"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#EFEFEF"
            android:hint="Email To"
            android:padding="10dp"
            android:layout_margin="5dp"/>

        <EditText
            android:id="@+id/edt_subject"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Subject"
            android:background="#EFEFEF"
            android:padding="10dp"
            android:layout_margin="5dp"/>

        <EditText
            android:id="@+id/edt_message"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:maxHeight="200dp"
            android:gravity="top"
            android:background="#EFEFEF"
            android:hint="Message"
            android:padding="10dp"
            android:layout_margin="5dp"/>

        <Button
            android:id="@+id/btn_send_email"
            android:layout_marginTop="10dp"
            android:background="@color/colorAccent"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textAllCaps="false"
            android:text="Send Mail"/>

</LinearLayout>

MainActivity.kt
Add the following code in the MainActivity.kt class.
package com.study.kotlinkatta

import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.widget.Button
import android.widget.EditText
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

    lateinit var btn_send_email: Button
    lateinit var edt_email_to: EditText
    lateinit var edt_subject: EditText
    lateinit var edt_message: EditText

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        edt_email_to = findViewById(R.id.edt_email_to)
        edt_subject = findViewById(R.id.edt_subject)
        edt_message = findViewById(R.id.edt_message)

        btn_send_email = findViewById(R.id.btn_send_email)
        btn_send_email.setOnClickListener {

            val str_email_to = edt_email_to.text.toString().trim()
            val str_subject = edt_subject.text.toString().trim()
            val str_message = edt_message.text.toString().trim()

            if(str_email_to.equals("") || str_subject.equals("") || str_message.equals("")){
                Toast.makeText(this, "Please enter all details", Toast.LENGTH_LONG).show()
            }else {
                func_sendEmail(str_email_to, str_subject, str_message)
            }
        }
    }

    private fun func_sendEmail(strEmailTo: String, strSubject: String, strMessage: String) {

        val intent = Intent(Intent.ACTION_SEND)
        intent.data = Uri.parse("mailto:")
        intent.type = "text/plain"
        intent.putExtra(Intent.EXTRA_EMAIL, arrayOf(strEmailTo))
        intent.putExtra(Intent.EXTRA_SUBJECT, strSubject)
        intent.putExtra(Intent.EXTRA_TEXT, strMessage)

        try {
            startActivity(Intent.createChooser(intent, "Choose Email Client..."))
        }
        catch (e: Exception){
            Toast.makeText(this, e.message, Toast.LENGTH_LONG).show()
        }

    }
}
Output: