我正在尝试使用javax.mail软件包从Android应用程序发送电子邮件，我发现this，它在premarshmallow操作系统上工作得很好但是当我试图从具有Marshmallow或以上操作系统的手机发送电子邮件时，Transport.send(message)挂起并且永远不会回来这是我的SendEmailTask课程
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) {}
}
logcat输出如下
09-12 08：29：21.872 6498-6542 /？ E / ErrorAsync：在出局之前
09-12 08：29：21.873 6498-6542 /？ E / ErrorAsync：在之前
我的问题是：有没有办法在Marshmallow或以上操作系统上以编程方式发送电子邮件？
我已经使用这个库创建了我的实现，并且它很长时间以来工作正常。所以尝试如下：
J SSE provider.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;
}
});
}
}
mail sender.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");
}
}
}
mail.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。您可以发送以下电子邮件：
Mail email = new Mail();
email.setReceiverId("");
email.setSenderId("");
email.setPassword("");
email.setSubject("");
email.setBody("");
email.sendMail();
注意根据您的提供商更改MailSender类中的smtp设置。我用过zoho邮件。