Sending mail in android without intents using SMTP

Question

Hi I am developing an android app which will send mail on click of a button. Code worked at first but due to some reason its not working now. Could anyone please help me wit

Answer 1

Here's the code in Kotlin.
Make sure to enable less secure app access in Gmail. To use secure access you will need to use OAUTH 2.
read more at: OAuth 2.0 Mechanism

    val username = "username"
    val password = "email@gmail.com"
    try {
        val props = Properties()
        props["mail.smtp.auth"] = "true"
        props["mail.smtp.starttls.enable"] = "true"
        props["mail.smtp.host"] = "smtp.gmail.com"
        props["mail.smtp.port"] = "587"

        val session = Session.getInstance(props, object : Authenticator() {
            override fun getPasswordAuthentication(): PasswordAuthentication? {
                return PasswordAuthentication(username, password)
            }
        })

        val message = MimeMessage(session)
        message.setFrom(username)
        message.setRecipients(Message.RecipientType.TO,InternetAddress.parse("email@gmail.com"))
        message.subject = "Automated Violation Detection Email";
        message.setText(
            "Your Text"
                    
        )

        Thread {
            Transport.send(message)
        }.start()
    } catch (e: Exception) {
        println("Error: $e")
        showToastLong("Oops! Something Went Wrong! Please Try Again")
    }