Question

我正在尝试开发一个使用JavaMail发送电子邮件的Android应用程序。我已经尝试了下面的代码作为控制台应用程序，它的工作原理，但当我从模拟器中使用作为Android应用程序时，它抛出异常，没有消息。我修改了manifest.xml并放了

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

但它仍然无效。 message.setText("Welcome to JavaMail");会抛出异常，请帮助我！

我正在使用Sun的mail.jar和activation.jar。

Bellow是ClickHandler上的完整代码。

 public void btnSendClickHandler(View view)
   {
    try{

        String host = "smtp.gmail.com";
        String from = "Username@gmail.com";
        String pass = "Password";
        Properties props = System.getProperties();
        props.put("mail.smtp.starttls.enable", "true"); // added this line
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth", "true");

        String[] to = {"toEmailAddress@gmail.com"}; // added this line

        Session session = Session.getDefaultInstance(props, null);

        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));

        InternetAddress[] toAddress = new InternetAddress[to.length];

        // To get the array of addresses
        for( int i=0; i < to.length; i++ ) { 
            toAddress[i] = new InternetAddress(to[i]);
        }


        for( int i=0; i < toAddress.length; i++) {
            message.addRecipient(Message.RecipientType.TO, toAddress[i]);
        }

        message.setSubject("sending in a group");
        message.setText("Welcome to JavaMail");//The exception is thrown here   

        Transport transport = session.getTransport("smtp");
        transport.connect(host, from, pass);
        transport.sendMessage(message, message.getAllRecipients());
        transport.close();
 } catch(Exception e){Toast.makeText(this, e.toString(),
        Toast.LENGTH_LONG).show();
                      }}

Answer 1

如果您使用以下内容设置正文，也许可以解决异常：

_multipart = new MimeMultipart();

BodyPart messageBodyPart = new MimeBodyPart();

messageBodyPart.setText("Welcome to JavaMail");

_multipart.addBodyPart(messageBodyPart);

message.setContent(_multipart);

从Android应用发送电子邮件

1 个答案: