我需要使用JAVA Mail发送电子邮件，内联图片不是附件。我使用了第三方JAR文件并修改了一些代码，但没有在我的电子邮件中获得任何图像。这是我的代码。
GMailSender.java
import java.io.ByteArrayInputStream;
import java.io.File;
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.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 GMailSender extends javax.mail.Authenticator
{
private String mailhost = "smtp.gmail.com";
private String user;
private String password;
private Session session;
private Transport transport;
private static final int SMTP_HOST_PORT = 465;
static
{
Security.addProvider(new com.power.calculator.gal.JSSEProvider());
}
public GMailSender(String user, String password) throws Exception
{
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);
session.setDebug(true);
transport = session.getTransport();
}
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(user, password);
}
public synchronized void sendMail(String subject, String body, String sender, String recipients, String imagePath) throws Exception
{
try
{
MimeMessage message = new MimeMessage(session);
DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/html"));
message.setSubject(subject);
message.addRecipient(Message.RecipientType.TO,
new InternetAddress(sender));
message.setDataHandler(handler);
message.setSender(new InternetAddress(sender));
Multipart multipart = new MimeMultipart();
MimeBodyPart messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(new File(imagePath));
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName("1.png");
messageBodyPart.setDisposition(MimeBodyPart.INLINE);
messageBodyPart.setHeader("Content-ID","<vogue>");
multipart.addBodyPart(messageBodyPart);
messageBodyPart = new MimeBodyPart();
String htmlText = body;
messageBodyPart.setContent(htmlText, "text/html");
multipart.addBodyPart(messageBodyPart);
message.setContent(multipart);
transport.connect(mailhost, SMTP_HOST_PORT, user, password);
if (recipients.indexOf(',') > 0)
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));
else
message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));
transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
transport.close();
}
catch(Exception e){}
}
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");
}
}
}
JSSEProvider.java
import java.security.AccessController;
import java.security.Provider;
@SuppressWarnings("serial")
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;
}
});
}
}
我的活动类：
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.app.Activity;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class PowerCalculatorActivity extends Activity implements OnClickListener, Runnable
{
protected static final String TAG = "TAG";
private static final String ERROR = "Error";
private static final String OK = "OK";
private static final int ZERO = 0;
private static final int ONE = 1;
private static final int TWO = 2;
private static final int THREE = 3;
private static final String MESSAGEONE = " Please enter valid email address ";
private static final String MESSAGETWO = "Please enter valid name and email address";
private static String mErrorMessages;
private EditText mName, mEmail;
private Button mSubmit;
private Dialog showErrorDialog, showProgressDialog;
private Handler mHandler = new Handler()
{
public void handleMessage(Message nMessage)
{
switch (nMessage.what)
{
case ZERO:
showProgressDialog.dismiss();
Intent mHelpIntent = new Intent(PowerCalculatorActivity.this, ByOptions.class);
mHelpIntent.setFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
startActivity(mHelpIntent);
PowerCalculatorActivity.this.finish();
break;
case ONE:
showProgressDialog.dismiss();
showErrorDialog(ERROR, MESSAGEONE, OK);
break;
case TWO:
showProgressDialog.dismiss();
showErrorDialog(ERROR, MESSAGETWO, OK);
break;
case THREE:
showProgressDialog.dismiss();
showErrorDialog(ERROR, mErrorMessages, OK);
break;
}
}
};
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.login);
//Initialize view
mName = (EditText)findViewById(R.id.NameText);
mEmail = (EditText)findViewById(R.id.EmailText);
mSubmit = (Button)findViewById(R.id.Submit);
mSubmit.setOnClickListener(this);
}
@Override
public void onClick(View nView)
{
switch(nView.getId())
{
case R.id.Submit:
showCustomProgressDialog();
Thread mLoadingThread = new Thread(this);
mLoadingThread.start();
break;
}
}
@Override
public void run()
{
if(mName.getText().toString().trim().length() > 0 && mEmail.getText().toString().trim().length() > 0)
{
String mSenderEmail = mEmail.getText().toString().trim();
boolean mValidEMail = isEmailValid(mSenderEmail);
if(mValidEMail)
{
String mEmailSubject = getResources().getString(R.string.emailsubject);
String mRecipients = getResources().getString(R.string.clientemail);
String mMyEmail = getResources().getString(R.string.emailaddress);
String mMessage = "Name: " + mName.getText().toString().trim() + "<br>" + "Email: " + mEmail.getText().toString().trim()
+ "<br><br>" + "<img src=\"cid:vogue\">";
String mImagePath = "/sdcard/1.png";
String mPassword = getResources().getString(R.string.emailpassword);
try
{
GMailSender mSender = new GMailSender(mMyEmail, mPassword);
mSender.sendMail(mEmailSubject,
mMessage,
mSenderEmail,
mRecipients, mImagePath);
}
catch(Exception e)
{
mErrorMessages = e.getMessage();
Log.e(TAG, e.getMessage(), e);
Message mMessageSend = new Message();
mMessageSend.what = THREE;
mHandler.sendMessage(mMessageSend);
}
Message mMessageSend = new Message();
mMessageSend.what = ZERO;//Success
mHandler.sendMessage(mMessageSend);
}
else
{
Message mMessageSend = new Message();
mMessageSend.what = ONE;//Fail
mHandler.sendMessage(mMessageSend);
}
}
else
{
Message mMessageSend = new Message();
mMessageSend.what = TWO;//Fail
mHandler.sendMessage(mMessageSend);
}
}
/**
* This method send data to the client using JAVA Mail
*/
private void showCustomProgressDialog()
{
showProgressDialog = new Dialog(PowerCalculatorActivity.this, R.style.ProgressDialog);
showProgressDialog.setContentView(R.layout.customloadingprogress);
showProgressDialog.getWindow().setGravity(Gravity.CENTER);
showProgressDialog.setCancelable(true);
showProgressDialog.show();
}
/**
* This method is used for checking valid email id format.
* @param email
* @return boolean true for valid and false for invalid
*/
public static boolean isEmailValid(String nComingEmail)
{
boolean isValid = false;
String mExpression = "^[\\w\\.-]+@([\\w\\-]+\\.)+[A-Z]{2,4}$";
CharSequence mInputEmail = nComingEmail;
Pattern mPattern = Pattern.compile(mExpression, Pattern.CASE_INSENSITIVE);
Matcher mMatcher = mPattern.matcher(mInputEmail);
if (mMatcher.matches())
{
isValid = true;
}
return isValid;
}
/**
* This method shows error message when entered information is wrong
* @param nTitle
* @param nMessage
* @param nPosButton
*/
private void showErrorDialog(String nTitle, String nMessage, String nPosButton)
{
showErrorDialog = new Dialog(this);
CustomDialog.Builder customBuilder = new CustomDialog.Builder(this);
customBuilder.setTitle(nTitle);
customBuilder.setMessage(nMessage);
customBuilder.setPositiveButton(nPosButton, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
showErrorDialog.dismiss();
}
});
showErrorDialog = customBuilder.create();
showErrorDialog.setCancelable(true);
showErrorDialog.show();
}
/**
* This method create option menu
* @param menu
* @return true if menu created successfully
*/
@Override
public boolean onCreateOptionsMenu(Menu nMenu)
{
MenuInflater mInflater = getMenuInflater();
mInflater.inflate(R.menu.menubar, nMenu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
//Handle item selection
switch (item.getItemId())
{
case R.id.help:
Intent mHelpIntent = new Intent(PowerCalculatorActivity.this, HelpScreen.class);
mHelpIntent.setFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
startActivity(mHelpIntent);
return true;
case R.id.contactus:
Intent mContactUsIntent = new Intent(PowerCalculatorActivity.this, ContactUs.class);
mContactUsIntent.setFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
startActivity(mContactUsIntent);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/**
* This method catches the back key event and finish the current activity
* @param keyevent
* @return boolean true for valid catch
*/
@Override
public boolean onKeyDown(int mKeyCode, KeyEvent mKeyEvent)
{
if ((!(android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.DONUT)
&& mKeyCode == KeyEvent.KEYCODE_BACK && mKeyEvent.getRepeatCount() == 0))
{
onBackPressed();
}
return super.onKeyDown(mKeyCode, mKeyEvent);
}
public void onBackPressed()
{
finish();
}
}
外部JARS可在此处获取：Sending Email in Android using JavaMail API without using the default/built-in app
完整解决方案：我已编辑了所有文件。
谢谢， AndroidVogue
答案 0 :(得分：3)
您需要另一个包含引用您图片的HTML的部分，请查看以下小例子：
public class GMail {
private static final String SMTP_HOST_NAME = "smtp.gmail.com";
private static final int SMTP_HOST_PORT = 465;
private static final String SMTP_AUTH_USER = "...@gmail.com";
private static final String SMTP_AUTH_PWD = "pwd";
public static void main(String[] args) throws Exception{
new GMail().send();
}
public void send() throws Exception{
// prepare session & transport object
Properties props = new Properties();
props.put("mail.transport.protocol", "smtps");
props.put("mail.smtps.host", SMTP_HOST_NAME);
props.put("mail.smtps.auth", "true");
Session mailSession = Session.getDefaultInstance(props);
mailSession.setDebug(true);
Transport transport = mailSession.getTransport();
// prepare messge
MimeMessage message = new MimeMessage(mailSession);
message.setSubject("Testing embedded image");
message.addRecipient(Message.RecipientType.TO,
new InternetAddress("...@googlemail.com"));
// create multipart
Multipart multipart = new MimeMultipart();
// create bodypart with image and set content-id
MimeBodyPart messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(new File("/Users/Tim/Desktop/image.png"));
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName("image.png");
messageBodyPart.setDisposition(MimeBodyPart.INLINE);
messageBodyPart.setHeader("Content-ID","<vogue>");
multipart.addBodyPart(messageBodyPart);
// create bodypart with html content and reference to the content-id
messageBodyPart = new MimeBodyPart();
String htmlText = "<img src=\"cid:vogue\">";
messageBodyPart.setContent(htmlText, "text/html");
multipart.addBodyPart(messageBodyPart);
// add multipart to message
message.setContent(multipart);
// connect & send message
transport.connect
(SMTP_HOST_NAME, SMTP_HOST_PORT, SMTP_AUTH_USER, SMTP_AUTH_PWD);
transport.sendMessage(message,
message.getRecipients(Message.RecipientType.TO));
transport.close();
}
}