如何在Android的后台发送电子邮件？

对于我的应用程序，我已经检索了我的消息inbox/sent 。 现在我想在我的电子邮件地址发送检索到的数据，可以吗？ 是否需要任何身份validation？ 另外我试图下载authentication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，可以在后台使用以下代码发送电子邮件，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; } }); } } 

你将需要activation.jar ， additionnal.jar和mail.jar文件

Answer 2

有一个在后台发送电子邮件的图书馆工作效率高。 您可以从这里获得图书馆的背景邮件库

现在在eclipse中导入这个库，然后转到项目属性并将这个库添加到你的项目中。 完成这个过程之后，把这些代码放到你的项目中，然后在后台发送邮件。

 BackgroundMail bm = new BackgroundMail(context); bm.setGmailUserName("[e-mail]"); bm.setGmailPassword("sender_email_password"); bm.setMailTo("[e-mail]"); bm.setFormSubject("Subject"); bm.setFormBody("Body"); bm.send(); 

有了这个权限

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

更新1：更新了库名称