我已经使用此代码制作了一个邮件应用程序，该应用程序在代码中接受验证参数。单独发送普通邮件工作正常，但添加附件是一个问题，注释行m.addAttachment（）使邮件成功发送即使我正确传递文件的路径。这是我使用的代码：
class MailSender extends AsyncTask<Void, Integer, Integer>
{
ProgressDialog pd = null;
/* (non-Javadoc)
* @see android.os.AsyncTask#onPreExecute()
*/
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pd = new ProgressDialog(MailSenderActivity.this);
pd.setTitle("Uploading...");
pd.setMessage("Uploading logs. Please wait...");
pd.setCancelable(false);
pd.show();
}
/* (non-Javadoc)
* @see android.os.AsyncTask#doInBackground(Params[])
*/
@Override
protected Integer doInBackground(Void... params) {
Mail m = new Mail("from_mail@gmail.com", "password");
String toAddresses = "to_mail@gmail.com";
m.setToAddresses(toAddresses);
m.setFromAddress("from_mail@gmail.com");
m.setMailSubject("This is an email sent using my Mail JavaMail wrapper from an Android device.");
m.setMailBody("Email body.");
/*try {
ZipUtility.zipDirectory(new File("/mnt/sdcard/logs/"), new File("/mnt/sdcard/logs.zip"));
} catch (IOException e1) {
Log.e("MailApp", "Could not zip folder", e1);
}*/
try {
m.addAttachment("/mnt/sdcard/Pictures/test.jpg");
if (m.send()) {
System.out.println("Message sent");
return 1;
} else {
return 2;
}
} catch (Exception e) {
Log.e("MailApp", "Could not send email", e);
}
return 3;
}
/* (non-Javadoc)
* @see android.os.AsyncTask#onPostExecute(java.lang.Object)
*/
@Override
protected void onPostExecute(Integer result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
pd.dismiss();
if(result==1)
Toast.makeText(MailSenderActivity.this,
"Email was sent successfully.", Toast.LENGTH_LONG)
.show();
else if(result==2)
Toast.makeText(MailSenderActivity.this,
"Email was not sent.", Toast.LENGTH_LONG).show();
else if(result==3)
Toast.makeText(MailSenderActivity.this,
"There was a problem sending the email.",
Toast.LENGTH_LONG).show();
}
Mail.java类
public class Mail extends javax.mail.Authenticator {
private Multipart attachements;
private String fromAddress = "";
private String accountEmail = "";
private String accountPassword = "";
private String smtpHost = "smtp.gmail.com";
private String smtpPort = "465"; // 465,587
private String toAddresses = "";
private String mailSubject = "";
private String mailBody = "";
public Mail() {
attachements = new MimeMultipart();
}
public Mail(String user, String pass) {
this();
accountEmail = user;
accountPassword = pass;
}
public boolean send() throws Exception {
Properties props = new Properties();
//props.put("mail.smtp.user", d_email);
props.put("mail.smtp.host", smtpHost);
props.put("mail.smtp.port", smtpPort);
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.debug", "true");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.socketFactory.port", smtpPort);
props.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback", "false");
try {
Session session = Session.getInstance(props, this);
session.setDebug(true);
MimeMessage msg = new MimeMessage(session);
// create the message part
MimeBodyPart messageBodyPart = new MimeBodyPart();
//fill message
messageBodyPart.setText(mailBody);
// add to multipart
attachements.addBodyPart(messageBodyPart);
//msg.setText(mailBody);
msg.setSubject(mailSubject);
msg.setFrom(new InternetAddress(fromAddress));
msg.addRecipients(Message.RecipientType.TO,
InternetAddress.parse(toAddresses));
msg.setContent(attachements);
Transport transport = session.getTransport("smtps");
transport.connect(smtpHost, 465, accountEmail, accountPassword);
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();
return true;
} catch (Exception e) {
return false;
}
}
public void addAttachment(String filename) throws Exception {
BodyPart messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(filename);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(filename);
attachements.addBodyPart(messageBodyPart);
}
private String getFormattedDate(Date date)
{
SimpleDateFormat sdf = new SimpleDateFormat("EEE, dd-MMM-yyyy hh:mm:ss a");
return sdf.format(date);
}
@Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(accountEmail, accountPassword);
}
/**
* Gets the fromAddress.
*
* @return <tt> the fromAddress.</tt>
*/
public String getFromAddress() {
return fromAddress;
}
/**
* Sets the fromAddress.
*
* @param fromAddress <tt> the fromAddress to set.</tt>
*/
public void setFromAddress(String fromAddress) {
this.fromAddress = fromAddress;
}
/**
* Gets the toAddresses.
*
* @return <tt> the toAddresses.</tt>
*/
public String getToAddresses() {
return toAddresses;
}
/**
* Sets the toAddresses.
*
* @param toAddresses <tt> the toAddresses to set.</tt>
*/
public void setToAddresses(String toAddresses) {
this.toAddresses = toAddresses;
}
/**
* Gets the mailSubject.
*
* @return <tt> the mailSubject.</tt>
*/
public String getMailSubject() {
return mailSubject;
}
/**
* Sets the mailSubject.
*
* @param mailSubject <tt> the mailSubject to set.</tt>
*/
public void setMailSubject(String mailSubject) {
this.mailSubject = mailSubject;
}
/**
* Gets the mailBody.
*
* @return <tt> the mailBody.</tt>
*/
public String getMailBody() {
return mailBody;
}
/**
* Sets the mailBody.
*
* @param mailBody <tt> the mailBody to set.</tt>
*/
public void setMailBody(String mailBody) {
this.mailBody = mailBody;
}
}
如您所见，addAttachment方法仅接受字符串，特别是文件路径。我已经直接传递了文件路径，因为我有一个名为＆＃39; test.jpg＆＃39;在我的图片文件夹中，但我仍然收到此消息：
java.io.FileNotFoundException: /mnt/sdcard/Pictures/test.jpg: open failed: EACCES (Permission denied)
我已经为INTERNET和EXTERNAL_DATA_STORAGE添加了权限，因此不是问题。似乎由于某种原因我无法在图片文件夹中访问此文件。
这里是Amaze中文件的位置：
