Javamail-Android配置步骤：
下载Android版本JavaMail包，additional.jar、mail.jar和activation.jar，下载地址JavaMail-Android
在项目与src同一目录级别下，新建文件夹lib，将下载的3个jar包放入该文件夹
右键->Properties->Java Build Path->Libraries，选择Add External JARs，找到项目下lib目录的3个jar包
我的代码有三个类：
第一个类：MailSenderInfo.java
package com.util.mail;
import java.util.Properties;
public class MailSenderInfo {
// 发送邮件的服务器的IP和端口
private String mailServerHost;
private String mailServerPort = "25";
// 邮件发送者的地址
private String fromAddress;
// 邮件接收者的地址
private String toAddress;
// 登陆邮件发送服务器的用户名和密码
private String userName;
private String password;
// 是否需要身份验证
private boolean validate = false;
// 邮件主题
private String subject;
// 邮件的文本内容
private String content;
// 邮件附件的文件名
private String[] attachFileNames;
public Properties getProperties(){
Properties p = new Properties();
p.put("mail.smtp.host", this.mailServerHost);
p.put("mail.smtp.port", this.mailServerPort);
p.put("mail.smtp.auth", validate ? "true" : "false");
return p;
}
public String getMailServerHost() {
return mailServerHost;
}
public void setMailServerHost(String mailServerHost) {
this.mailServerHost = mailServerHost;
}
public String getMailServerPort() {
return mailServerPort;
}
public void setMailServerPort(String mailServerPort) {
this.mailServerPort = mailServerPort;
}
public boolean isValidate() {
return validate;
}
public void setValidate(boolean validate) {
this.validate = validate;
}
public String[] getAttachFileNames() {
return attachFileNames;
}
public void setAttachFileNames(String[] fileNames) {
this.attachFileNames = fileNames;
}
public String getFromAddress() {
return fromAddress;
}
public void setFromAddress(String fromAddress) {
this.fromAddress = fromAddress;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getToAddress() {
return toAddress;
}
public void setToAddress(String toAddress) {
this.toAddress = toAddress;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
public String getContent() {
return content;
}
public void setContent(String textContent) {
this.content = textContent;
}
}
第二个类：MultiMailsender.java
package com.util.mail;
import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
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 MultiMailsender {
public boolean sendTextMail(MultiMailSenderInfo mailInfo) {
// 判断是否需要身份认证
MyAuthenticator authenticator = null;
Properties pro = mailInfo.getProperties();
if (mailInfo.isValidate()) {
// 如果需要身份认证，则创建一个密码验证器
authenticator = new MyAuthenticator(mailInfo.getUserName(), mailInfo.getPassword());
}
// 根据邮件会话属性和密码验证器构造一个发送邮件的session
Session sendMailSession = Session.getDefaultInstance(pro,authenticator);
try {
// 根据session创建一个邮件消息
Message mailMessage = new MimeMessage(sendMailSession);
// 创建邮件发送者地址
Address from = new InternetAddress(mailInfo.getFromAddress());
// 设置邮件消息的发送者
mailMessage.setFrom(from);
// 创建邮件的接收者地址，并设置到邮件消息中
Address[] tos = null;
String[] receivers = mailInfo.getReceivers();
if (receivers != null){
// 为每个邮件接收者创建一个地址
tos = new InternetAddress[receivers.length + 1];
tos[0] = new InternetAddress(mailInfo.getToAddress());
for (int i=0; i
tos[i+1] = new InternetAddress(receivers[i]);
}
} else {
tos = new InternetAddress[1];
tos[0] = new InternetAddress(mailInfo.getToAddress());
}
// Message.RecipientType.TO属性表示接收者的类型为TO
mailMessage.setRecipients(Message.RecipientType.TO,tos);
// 设置邮件消息的主题
mailMessage.setSubject(mailInfo.getSubject());
// 设置邮件消息发送的时间
mailMessage.setSentDate(new Date());
// 设置邮件消息的主要内容
String mailContent = mailInfo.getContent();
mailMessage.setText(mailContent);
// 发送邮件
Transport.send(mailMessage);
return true;
} catch (MessagingException ex) {
ex.printStackTrace();
}
return false;
}
public static boolean sendMailtoMultiReceiver(MultiMailSenderInfo mailInfo){
MyAuthenticator authenticator = null;
if (mailInfo.isValidate()) {
authenticator = new MyAuthenticator(mailInfo.getUserName(),
mailInfo.getPassword());
}
Session sendMailSession = Session.getInstance(mailInfo
.getProperties(), authenticator);
try {
Message mailMessage = new MimeMessage(sendMailSession);
// 创建邮件发送者地址
Address from = new InternetAddress(mailInfo.getFromAddress());
mailMessage.setFrom(from);
// 创建邮件的接收者地址，并设置到邮件消息中
Address[] tos = null;
String[] receivers = mailInfo.getReceivers();
if (receivers != null){
// 为每个邮件接收者创建一个地址
tos = new InternetAddress[receivers.length + 1];
tos[0] = new InternetAddress(mailInfo.getToAddress());
for (int i=0; i
tos[i+1] = new InternetAddress(receivers[i]);
}
} else {
tos = new InternetAddress[1];
tos[0] = new InternetAddress(mailInfo.getToAddress());
}
// 将所有接收者地址都添加到邮件接收者属性中
mailMessage.setRecipients(Message.RecipientType.TO, tos);
mailMessage.setSubject(mailInfo.getSubject());
mailMessage.setSentDate(new Date());
// 设置邮件内容
Multipart mainPart = new MimeMultipart();
BodyPart html = new MimeBodyPart();
html.setContent(mailInfo.getContent(), "text/html; charset=GBK");
mainPart.addBodyPart(html);
mailMessage.setContent(mainPart);
// 发送邮件
Transport.send(mailMessage);
return true;
} catch (MessagingException ex) {
ex.printStackTrace();
}
return false;
}
public static boolean sendMailtoMultiCC(MultiMailSenderInfo mailInfo){
MyAuthenticator authenticator = null;
if (mailInfo.isValidate()) {
authenticator = new MyAuthenticator(mailInfo.getUserName(),
mailInfo.getPassword());
}
Session sendMailSession = Session.getInstance(mailInfo
.getProperties(), authenticator);
try {
Message mailMessage = new MimeMessage(sendMailSession);
// 创建邮件发送者地址
Address from = new InternetAddress(mailInfo.getFromAddress());
mailMessage.setFrom(from);
// 创建邮件的接收者地址，并设置到邮件消息中
Address to = new InternetAddress(mailInfo.getToAddress());
mailMessage.setRecipient(Message.RecipientType.TO, to);
// 获取抄送者信息
String[] ccs = mailInfo.getCcs();
if (ccs != null){
// 为每个邮件接收者创建一个地址
Address[] ccAdresses = new InternetAddress[ccs.length];
for (int i=0; i
ccAdresses[i] = new InternetAddress(ccs[i]);
}
// 将抄送者信息设置到邮件信息中，注意类型为Message.RecipientType.CC
mailMessage.setRecipients(Message.RecipientType.CC, ccAdresses);
}
mailMessage.setSubject(mailInfo.getSubject());
mailMessage.setSentDate(new Date());
// 设置邮件内容
Multipart mainPart = new MimeMultipart();
BodyPart html = new MimeBodyPart();
html.setContent(mailInfo.getContent(), "text/html; charset=GBK");
mainPart.addBodyPart(html);
mailMessage.setContent(mainPart);
// 发送邮件
Transport.send(mailMessage);
return true;
} catch (MessagingException ex) {
ex.printStackTrace();
}
return false;
}
public static class MultiMailSenderInfo extends MailSenderInfo{
// 邮件的接收者，可以有多个
private String[] receivers;
// 邮件的抄送者，可以有多个
private String[] ccs;
public String[] getCcs() {
return ccs;
}
public void setCcs(String[] ccs) {
this.ccs = ccs;
}
public String[] getReceivers() {
return receivers;
}
public void setReceivers(String[] receivers) {
this.receivers = receivers;
}
}
}
第三个类：MyAuthenticator.java
package com.util.mail;
import javax.mail.*;
public class MyAuthenticator extends Authenticator{
String userName=null;
String password=null;
public MyAuthenticator(){
}
public MyAuthenticator(String username, String password) {
this.userName = username;
this.password = password;
}
protected PasswordAuthentication getPasswordAuthentication(){
return new PasswordAuthentication(userName, password);
}
}
下面给出使用上面三个类的代码：
public static void main(String[] args){
//这个类主要是设置邮件
MultiMailSenderInfo mailInfo = new MultiMailSenderInfo();
mailInfo.setMailServerHost("smtp.163.com");
mailInfo.setMailServerPort("25");
mailInfo.setValidate(true);
mailInfo.setUserName("xxx@163.com");
mailInfo.setPassword("**********");//您的邮箱密码
mailInfo.setFromAddress("xxx@163.com");
mailInfo.setToAddress("xxx@163.com");
mailInfo.setSubject("设置邮箱标题");
mailInfo.setContent("设置邮箱内容");
String[] receivers = new String[]{"***@163.com", "***@tom.com"};
String[] ccs = receivers; mailInfo.setReceivers(receivers);
mailInfo.setCcs(ccs);
//这个类主要来发送邮件
MultiMailsender sms = new MultiMailsender();
sms.sendTextMail(mailInfo);//发送文体格式
MultiMailsender.sendHtmlMail(mailInfo);//发送html格式
MultiMailsender.sendMailtoMultiCC(mailInfo);//发送抄送
最后，给出朋友们几个注意的地方：
1、使用此代码你可以完成你的javamail的邮件发送功能、发多个邮箱。三个类缺一不可。
2、这三个类我打包是用的com.util.mail包，如果不喜欢，你可以自己改，但三个类文件必须在同一个包中
3、不要使用你刚刚注册过的邮箱在程序中发邮件，如果你的163邮箱是刚注册不久，那你就不要使用“smtp.163.com”。因为你发不出去。刚注册的邮箱是不会给你这种权限的，也就是你不能通过验证。要使用你经常用的邮箱，而且时间比较长的。
4、另一个问题就是mailInfo.setMailServerHost("smtp.163.com");与mailInfo.setFromAddress("xxx@163.com");这两句话。即如果你使用163smtp服务器，那么发送邮件地址就必须用163的邮箱，如果不的话，是不会发送成功的。
5、关于javamail验证错误的问题，网上的解释有很多，但我看见的只有一个。就是我的第三个类。你只要复制全了代码，我想是不会有问题的。
6、 然后在Android项目中添加网络访问权限