需要三个jar包，可自行百度进行下载。 activation.jar additionnal.jar mail.jar 本例子是使用163邮箱进行邮件发送的。 这里面有些注意事项，下图中的权限是要开启的 另外一个注意事项就是，代码中的账户是 你的邮箱账号，但是密码是下图中的授权码，否则的话会提示“授权失败”
所需要的权限
<uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>废话不多说，直接上代码。
import android.os.AsyncTask; import java.io.IOException; import java.util.Date; import java.util.List; import java.util.Properties; import javax.mail.Authenticator; import javax.mail.Message; import javax.mail.MessagingException; 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; /** * 邮件管理类 */ public class MailManager { //以163邮箱为例,需要提前在163邮箱设置里面开启smtp. //发送账户 private static final String SENDER_NAME = "18010402108@163.com"; //发送账户的密码(客户端授权密码) private static final String SENDER_PASS = "wugui1234"; //邮箱服务器 private static final String VALUE_MAIL_HOST = "smtp.163.com"; //邮箱服务器主机 private static final String KEY_MAIL_HOST = "mail.smtp.host"; //邮箱是否需要鉴权 private static final String KEY_MAIL_AUTH = "mail.smtp.auth"; //需要鉴权 private static final String VALUE_MAIL_AUTH = "true"; public static MailManager getInstance() { return InstanceHolder.instance; } private MailManager() { } private static class InstanceHolder { private static MailManager instance = new MailManager(); } class MailTask extends AsyncTask<Void, Void, Boolean> { private MimeMessage mimeMessage; public MailTask(MimeMessage mimeMessage) { this.mimeMessage = mimeMessage; } @Override protected Boolean doInBackground(Void... voids) { try { Transport.send(mimeMessage); return Boolean.TRUE; } catch (MessagingException e) { e.printStackTrace(); return Boolean.FALSE; } } } public void sendMail(final String title, final String content) { MimeMessage mimeMessage = createMessage(title, content); MailTask mailTask = new MailTask(mimeMessage); mailTask.execute(); } public void sendMailWithFile(String title, String content, String filePath) { MimeMessage mimeMessage = createMessage(title, content); appendFile(mimeMessage, filePath); MailTask mailTask = new MailTask(mimeMessage); mailTask.execute(); } public void sendMailWithMultiFile(String title, String content, List<String> pathList) { MimeMessage mimeMessage = createMessage(title, content); appendMultiFile(mimeMessage, pathList); MailTask mailTask = new MailTask(mimeMessage); mailTask.execute(); } private Authenticator getAuthenticator() { return new Authenticator(){ @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(SENDER_NAME, SENDER_PASS); } }; } private MimeMessage createMessage(String title, String content) { Properties properties = System.getProperties(); properties.put(KEY_MAIL_HOST, VALUE_MAIL_HOST); properties.put(KEY_MAIL_AUTH, VALUE_MAIL_AUTH); Session session = Session.getInstance(properties, getAuthenticator()); //创建消息 MimeMessage mimeMessage = new MimeMessage(session); try { //设置发送者 mimeMessage.setFrom(new InternetAddress(SENDER_NAME)); //设置接收者 InternetAddress[] addresses = new InternetAddress[]{new InternetAddress(SENDER_NAME)}; mimeMessage.setRecipients(Message.RecipientType.TO, "18010402108@163.com"); //设置邮件的主题 mimeMessage.setSubject(title); //设置邮件的内容 MimeBodyPart textPart = new MimeBodyPart(); textPart.setContent(content, "text/html;charset=gbk"); Multipart multipart = new MimeMultipart(); multipart.addBodyPart(textPart); mimeMessage.setContent(multipart); //设置发送时间 mimeMessage.setSentDate(new Date()); } catch (MessagingException e) { e.printStackTrace(); } return mimeMessage; } //添加文件附件 private void appendFile(MimeMessage message, String filePath) { try { Multipart multipart = (Multipart) message.getContent(); MimeBodyPart filePart = new MimeBodyPart(); filePart.attachFile(filePath); multipart.addBodyPart(filePart); } catch (IOException e) { e.printStackTrace(); } catch (MessagingException e) { e.printStackTrace(); } } //添加多个文件附件 private void appendMultiFile(MimeMessage message, List<String> pathList) { try { Multipart multipart = (Multipart) message.getContent(); for (String path : pathList) { MimeBodyPart filePart = new MimeBodyPart(); filePart.attachFile(path); multipart.addBodyPart(filePart); } } catch (IOException e) { e.printStackTrace(); } catch (MessagingException e) { e.printStackTrace(); } } }调用时代码
//发送邮件 MailManager.getInstance().sendMailWithFile("123","123","/sdcard/Test/log.txt");感谢：https://github.com/Dev-Wiki/MailSender
