android - 发送邮件而不显示邮件编辑框

Question

通常当我们尝试发送邮件时，我们的设备会打开所有可用的邮件客户端，如 gmail、yahoo 等。是否可以在不打开任何邮件客户端的情况下发送邮件？？一旦我点击发送邮件按钮，它应该直接发送邮件而不提示任何邮件编辑框。

Answer 1

是的，可以在后台发送电子邮件：

在您的项目中使用以下 jar 文件：

1. 激活.jar
2. 附加的.jar
3. 邮件.jar

Mail.java在你的包中添加这个类：

package com.abc;

import java.util.Date;
import java.util.Properties;
import javax.activation.CommandMap;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.MailcapCommandMap;
import javax.mail.BodyPart;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class Mail extends javax.mail.Authenticator {
    private String _user;
    private String _pass;

    private String[] _to;
    private String _from;

    private String _port;
    private String _sport;

    private String _host;

    private String _subject;
    private String _body;

    private boolean _auth;

    private boolean _debuggable;

    private Multipart _multipart;


    public Mail() {
        _host = "smtp.gmail.com"; // default smtp server
        _port = "465"; // default smtp port
        _sport = "465"; // default socketfactory port

        _user = ""; // username
        _pass = ""; // password
        _from = ""; // email sent from
        _subject = ""; // email subject
        _body = ""; // email body

        _debuggable = false; // debug mode on or off - default off
        _auth = true; // smtp authentication - default on

        _multipart = new MimeMultipart();

        // There is something wrong with MailCap, javamail can not find a
        // handler for the multipart/mixed part, so this bit needs to be added.
        MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();
        mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
        mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
        mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
        mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
        mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
        CommandMap.setDefaultCommandMap(mc);
    }


    public Mail(String user, String pass) {
        this();

        _user = user;
        _pass = pass;
    }

     public void setTo(String[] toArr){
         _to = toArr;
     }

     public void setFrom(String from){
         _from = from;
     }
     public void setSubject(String subject){
         _subject = subject;
     }

    public boolean send() throws Exception {
        Properties props = _setProperties();

        if (!_user.equals("") && !_pass.equals("") && _to.length > 0
                && !_from.equals("") && !_subject.equals("")
                && !_body.equals("")) {
            Session session = Session.getInstance(props, this);

            MimeMessage msg = new MimeMessage(session);

            msg.setFrom(new InternetAddress(_from));

            InternetAddress[] addressTo = new InternetAddress[_to.length];
            for (int i = 0; i < _to.length; i++) {
                addressTo[i] = new InternetAddress(_to[i]);
            }
            msg.setRecipients(MimeMessage.RecipientType.TO, addressTo);

            msg.setSubject(_subject);
            msg.setSentDate(new Date());

            // setup message body
            BodyPart messageBodyPart = new MimeBodyPart();
            messageBodyPart.setText(_body);
            _multipart.addBodyPart(messageBodyPart);

            // Put parts in message
            msg.setContent(_multipart);

            // send email
            Transport.send(msg);

            return true;
        } else {
            return false;
        }
    }

    public void addAttachment(String filename) throws Exception {
        BodyPart messageBodyPart = new MimeBodyPart();
        DataSource source = new FileDataSource(filename);
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName(filename);

        _multipart.addBodyPart(messageBodyPart);
    }

    @Override
    public PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(_user, _pass);
    }

    private Properties _setProperties() {
        Properties props = new Properties();

        props.put("mail.smtp.host", _host);

        if (_debuggable) {
            props.put("mail.debug", "true");
        }

        if (_auth) {
            props.put("mail.smtp.auth", "true");
        }

        props.put("mail.smtp.port", _port);
        props.put("mail.smtp.socketFactory.port", _sport);
        props.put("mail.smtp.socketFactory.class",
                "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.socketFactory.fallback", "false");

        return props;
    }

    // the getters and setters
    public String getBody() {
        return _body;
    }

    public void setBody(String _body) {
        this._body = _body;
    }
//  static {   
//        Security.addProvider(new com.indianic.email.JSSEProvider());   
//    }  

    // more of the getters and setters �..
} 

---

现在发送邮件（在 asyncTask 中使用下面的代码）：它在不打开任何电子邮件编辑器的情况下发送邮件

try {

                Mail m1 = new Mail("fromEmail@gmail.com", "your password");
                String[] toArr1 = new String[1];
                toArr1[0] = "toEmail@gmail.com";
                m1.setTo(toArr1);
                m1.setFrom("<EMAIL>");

                m1.setSubject("mail from Android app");
                m1.setBody("" + sendMText);
                try {
                    // m1.addAttachment(filename);
                    if (m1.send()) {

                        Log.e("sent-->", ".sent");
                    } else {

                        Log.e("not sent-->", "sent");
                    }
                } catch (Exception e) { //
                    // TODO: handle exception
                    Log.e("mail not sent-->", "" + e.getMessage().toString());

                }

            } catch (Exception e) {

                e.printStackTrace();
            }