以编程方式发送自动电子邮件[重复]

Posted 2023-03-15

【中文标题】以编程方式发送自动电子邮件[重复]

【英文标题】：Send auto email programmatically [duplicate]

【发布时间】：2011-06-07 19:40:50

【问题描述】：

我想以编程方式发送电子邮件。

我尝试了以下代码。

最终意图 emailIntent = new Intent( android.content.Intent.ACTION_SEND);

  emailIntent.setType("plain/text");

  emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,
          new String[]  "[e-mail]" );

  emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT,
          "Email Subject");

  emailIntent.putExtra(android.content.Intent.EXTRA_TEXT,
          "Email Body");

  startActivity(Intent.createChooser(
          emailIntent, "Send mail..."));

但问题是在发送电子邮件之前应用程序打开活动

我想直接发送电子邮件而无需打开撰写活动。这怎么可能？

【问题讨论】：

你为什么不试试 startActivityforResult 的东西？

这能回答你的问题吗？ Sending Email in Android using JavaMail API without using the default/built-in app

【参考方案1】：

使用 Kotlin 以编程方式发送电子邮件。

简单的电子邮件发送，而不是所有其他功能（如附件）。 TLS 始终开启 也只需要 1 个 gradle 电子邮件依赖项。

我还发现这个电子邮件 POP 服务列表非常有用：

https://support.office.com/en-gb/article/pop-and-imap-email-settings-for-outlook-8361e398-8af4-4e97-b147-6c6c4ac95353

使用方法：

    val auth = EmailService.UserPassAuthenticator("yourUser", "yourPass")
    val to = listOf(InternetAddress("[e-mail]"))
    val from = InternetAddress("[e-mail]")
    val email = EmailService.Email(auth, to, from, "Test Subject", "Hello Body World")
    val emailService = EmailService("yourSmtpServer", 587)

    GlobalScope.launch  // or however you do background threads
        emailService.send(email)
    

代码：

import java.util.*
import javax.mail.*
import javax.mail.internet.InternetAddress
import javax.mail.internet.MimeBodyPart
import javax.mail.internet.MimeMessage
import javax.mail.internet.MimeMultipart

class EmailService(private var server: String, private var port: Int) 

    data class Email(
        val auth: Authenticator,
        val toList: List<InternetAddress>,
        val from: Address,
        val subject: String,
        val body: String
    )

    class UserPassAuthenticator(private val username: String, private val password: String) : Authenticator() 
        override fun getPasswordAuthentication(): PasswordAuthentication 
            return PasswordAuthentication(username, password)
        
    

    fun send(email: Email) 
        val props = Properties()
        props["mail.smtp.auth"] = "true"
        props["mail.user"] = email.from
        props["mail.smtp.host"] = server
        props["mail.smtp.port"] = port
        props["mail.smtp.starttls.enable"] = "true"
        props["mail.smtp.ssl.trust"] = server
        props["mail.mime.charset"] = "UTF-8"
        val msg: Message = MimeMessage(Session.getDefaultInstance(props, email.auth))
        msg.setFrom(email.from)
        msg.sentDate = Calendar.getInstance().time
        msg.setRecipients(Message.RecipientType.TO, email.toList.toTypedArray())
//      msg.setRecipients(Message.RecipientType.CC, email.ccList.toTypedArray())
//      msg.setRecipients(Message.RecipientType.BCC, email.bccList.toTypedArray())
        msg.replyTo = arrayOf(email.from)

        msg.addHeader("X-Mailer", CLIENT_NAME)
        msg.addHeader("Precedence", "bulk")
        msg.subject = email.subject

        msg.setContent(MimeMultipart().apply 
            addBodyPart(MimeBodyPart().apply 
                setText(email.body, "iso-8859-1")
                //setContent(email.htmlBody, "text/html; charset=UTF-8")
            )
        )
        Transport.send(msg)
    

    companion object 
        const val CLIENT_NAME = "Android *** programmatic email"
    

分级：

dependencies 
    implementation 'com.sun.mail:android-mail:1.6.4'
    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.3"

AndroidManifest：

<uses-permission name="android.permission.INTERNET" />

【参考方案2】：

这可能是最简单的方法-

    String recipientList = mEditTextTo.getText().toString();
    String[] recipients = recipientList.split(",");

    String subject = mEditTextSubject.getText().toString();
    String message = mEditTextMessage.getText().toString();

    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.putExtra(Intent.EXTRA_EMAIL, recipients);
    intent.putExtra(Intent.EXTRA_SUBJECT, subject);
    intent.putExtra(Intent.EXTRA_TEXT, message);

    intent.setType("message/rfc822");
    startActivity(Intent.createChooser(intent, "Choose an email client"));

【参考方案3】：

引用的链接有正确答案，但有编写一些库来让您的工作轻松。

https://github.com/yesidlazaro/GmailBackground https://github.com/thegenuinegourav/Android-Email-App-using-Javamail-Api https://github.com/prashantwosti/BackgroundMailLibrary

所以不要重新编写所有代码，只需使用这些库中的任何一个即可在短时间内完成您的工作。