javax.mail 无法在 Marshmallow 或更高版本的系统上运行

Question

我正在尝试使用 javax.mail 包从 android 应用程序发送电子邮件 我发现了这个，它在前棉花糖操作系统上运行良好，但是当我尝试从具有棉花糖或更高版本操作系统的手机发送电子邮件时Transport.send(message)挂着，再也回不来了 这是我SendEmailTask课

public static class SendEmailTask extends AsyncTask<Void, Void, Boolean> {
@Override
protected Boolean doInBackground(Void... params) {
int a=5;
Log.e("ErrorAsync","before out");
try {
Log.e("ErrorAsync","before in");
Transport.send(message);
Log.e("ErrorAsync","after in");
} catch (Exception e) {
e.printStackTrace();
Log.e("ErrorAsync",e.getMessage());
}
Log.e("ErrorAsync","after out");
return true;
}
@Override
protected void onPostExecute(Boolean result) {
}
@Override
protected void onPreExecute() {
if(android.os.Debug.isDebuggerConnected())
android.os.Debug.waitForDebugger();
}
@Override
protected void onProgressUpdate(Void... values) {}
}

日志猫输出如下

09-12 08：29：21.872 6498-6542/？E/错误异步：在输出之前

09-12 08：29：21.873 6498-6542/？E/错误异步：在

我的问题是： 有没有办法在棉花糖或更高版本的操作系统上以编程方式发送电子邮件？

Answer 1

我使用这个库创建了我的实现，它长期以来一直工作正常。所以像下面这样尝试：

JSSEProvider.java

import java.security.AccessController;
import java.security.Provider;
public final class JSSEProvider extends Provider {
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;
}
});
}
}

邮件发件人.java

import android.util.Log;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.Security;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
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 MailSender extends javax.mail.Authenticator {
private String mailhost = "smtp.zoho.com";
private String user;
private String password;
private Session session;
private Multipart _multipart = new MimeMultipart();
static {
Security.addProvider(new JSSEProvider());
}
public MailSender(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);
}
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, password);
}
public synchronized void sendMail(String subject, String body,
String sender, String recipients) throws Exception {
try {
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);
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText(body);
_multipart.addBodyPart(messageBodyPart);
// Put parts in message
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);
} catch (Exception e) {
e.printStackTrace();
}
}
public void addAttachment(String filename) throws Exception {
BodyPart messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(filename);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName("download image");
_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");
}
}
}

邮件.java

import android.util.Log;
public class Mail {
String senderId,password,receiverId,subject,body;
public Mail() {
}
public void setSenderId(String senderId) {
this.senderId = senderId;
}
public void setPassword(String password) {
this.password = password;
}
public void setReceiverId(String receiverId) {
this.receiverId = receiverId;
}
public void setSubject(String subject) {
this.subject = subject;
}
public void setBody(String body) {
this.body = body;
}
public void sendMail(){
new Thread(new Runnable() {
public void run() {
try {
MailSender sender = new MailSender(
senderId,
password);
sender.sendMail(subject,
body,
senderId,
receiverId);
} catch (Exception e) {
Log.e("mailError",e.getMessage());
e.printStackTrace();
}
}
}).start();
}
}

将所有这些类保存在一个包中。 您可以像这样发送电子邮件：

Mail email = new Mail();
email.setReceiverId("");
email.setSenderId("");
email.setPassword("");
email.setSubject("");
email.setBody("");
email.sendMail();

注意：根据您的提供程序更改邮件发件人类中的 smtp 设置。我使用了 zoho 邮件。