如何在 Android 后台发送电子邮件？ [复制]

Question

对于我的应用程序，我已检索到我的消息 inbox/sent。现在我想在我的电子邮件地址上发送检索到的数据。怎么可能？是否需要任何身份验证？我也尝试过下载认证文件（authentication.jar,mail.jar）但不能成功。

long currentTime = System.currentTimeMillis();
    long pastThreeHour = currentTime - (AlarmManager.INTERVAL_HOUR * 3);
    String[] selectionArgs = { "" + pastThreeHour, "" + currentTime };

    Cursor cursor = contentResolver.query(uri, null, selection, selectionArgs, "date DESC");

    if (cursor != null && cursor.getCount() > 0) {
        while (cursor.moveToNext()) {

            String number = cursor.getString(cursor.getColumnIndex("address")); // check for null
            String date = cursor.getString(cursor.getColumnIndex("date")); // convert to date its long
            String message_text = cursor.getString(cursor.getColumnIndex("body"));
            String type = cursor.getString(cursor.getColumnIndex("type")); // check type and get names

            // send email from here
            sendSMSEmail(number, date, message_text, type);
        }
    }
    cursor.close();
}

Answer 1

是的，可以使用以下代码在后台发送电子邮件，发送电子邮件

public class GMailSender extends javax.mail.Authenticator 
{   
    private String mailhost = "smtp.gmail.com";   
    private String user;   
    private String password;   
    private Session session;   
    private Multipart _multipart;

    static 
    {   
        Security.addProvider(new JSSEProvider());   
    }  

    public GMailSender(String user, String password) 
    {   
        this.user = user;   
        this.password = password;   

        Properties props = new Properties();   
        props.setProperty("mail.transport.protocol", "smtp");   
        props.setProperty("mail.host", mailhost);   
        props.put("mail.smtp.auth", "true");   
        props.put("mail.smtp.port", "465");   
        props.put("mail.smtp.socketFactory.port", "465");   
        props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");   
        props.put("mail.smtp.socketFactory.fallback", "false");   
        props.setProperty("mail.smtp.quitwait", "false");   

        session = Session.getDefaultInstance(props, this);
        _multipart = new MimeMultipart();
    }   

    protected PasswordAuthentication getPasswordAuthentication() 
    {   
        return new PasswordAuthentication(user, password);   
    }   

    public synchronized void sendMail(String subject, String body, String sender, String recipients) throws Exception 
    {   
        MimeMessage message = new MimeMessage(session);   
        DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain"));   
        message.setSender(new InternetAddress(sender));   
        message.setSubject(subject);   

        message.setDataHandler(handler);   
        message.setContent(_multipart);
        if (recipients.indexOf(',') > 0)   
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));   
        else  
            message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));   
        Transport.send(message);   

    }   

    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);
    }

    public class ByteArrayDataSource implements DataSource 
    {   
        private byte[] data;   
        private String type;   

        public ByteArrayDataSource(byte[] data, String type) 
        {   
            super();   
            this.data = data;   
            this.type = type;   
        }   

        public ByteArrayDataSource(byte[] data) 
        {   
            super();   
            this.data = data;   
        }   

        public void setType(String type) 
        {   
            this.type = type;   
        }   

        public String getContentType() 
        {   
            if (type == null)   
                return "application/octet-stream";   
            else  
                return type;   
        }   

        public InputStream getInputStream() throws IOException 
        {   
            return new ByteArrayInputStream(data);   
        }   

        public String getName() 
        {   
            return "ByteArrayDataSource";   
        }   

        public OutputStream getOutputStream() throws IOException 
        {   
            throw new IOException("Not Supported");   
        }   
    }   
}

和

public final class JSSEProvider extends Provider 
{
    private static final long serialVersionUID = 1L;

    public JSSEProvider() 
    {
        super("HarmonyJSSE", 1.0, "Harmony JSSE Provider");
        AccessController.doPrivileged(new java.security.PrivilegedAction<Void>() 
        {
            public Void run() 
            {
                put("SSLContext.TLS",
                        "org.apache.harmony.xnet.provider.jsse.SSLContextImpl");
                put("Alg.Alias.SSLContext.TLSv1", "TLS");
                put("KeyManagerFactory.X509",
                        "org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl");
                put("TrustManagerFactory.X509",
                        "org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl");
                return null;
            }
        });
    }
}

您将需要 activation.jar、additionnal.jar 和 mail.jar 文件

Answer 2

有一个用于在后台发送电子邮件的库，它的工作效率很高。 你可以从这里获取图书馆Background Mail Library

现在在你的eclipse中导入这个库，然后去项目属性，把这个库添加到你的项目中。 完成所有这些过程后，只需将这些代码放入您的项目中，它就会在后台发送电子邮件。

BackgroundMail bm = new BackgroundMail(context);
bm.setGmailUserName("sendername@gmail.com");
bm.setGmailPassword("sender_email_password");
bm.setMailTo("receiver@gmail.com");
bm.setFormSubject("Subject");
bm.setFormBody("Body");
bm.send();

拥有此权限

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

更新 1：更新库名称