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我一直在努力让邮件应用从一个教程工作在为什么我的邮件应用程序不能运行（运行时错误）？
http://www.jondev.net/articles/Sending_Emails_without_User_Intervention_%28no_Intents%29_in_Android
但是我一直在每一次我尝试运行它时得到一个运行时错误。我是新来的android编程，我不太清楚如何阅读logcat错误，所以我把自己摆在互联网的摆布，请帮助。
我已正确设置了互联网权限，并且activation.jar，mail.jar和additional.jar包含在项目中，并且已为其设置了构建路径。
主代码
package com.dummies.android.MailTest;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MailTestActivity extends Activity
{
private Button mButton;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
mButton = (Button) findViewById(R.id.send);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button mButton = (Button) findViewById(R.id.send);
mButton.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
Mail m = new Mail("********.com", "********");
String[] toArr = {"*******@gmail.com"};
m.setTo(toArr);
m.setFrom("*********.com");
m.setSubject("This is an email sent using my Mail JavaMail wrapper from an Android device.");
m.setBody("Email body.");
try {
//m.addAttachment("/sdcard/filelocation");
if(m.send()) {
Toast.makeText(MailTestActivity.this, "Email was sent successfully.", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(MailTestActivity.this, "Email was not sent.", Toast.LENGTH_LONG).show();
}
} catch(Exception e) {
//Toast.makeText(MailApp.this, "There was a problem sending the email.", Toast.LENGTH_LONG).show();
Log.e("MailApp", "Could not send email", e);
}
}
});
}
}
邮件类
package com.dummies.android.MailTest;
import java.util.Date;
import java.util.Properties;
import javax.activation.CommandMap;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.MailcapCommandMap;
import javax.mail.BodyPart;
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 Mail extends javax.mail.Authenticator {
private String _user;
private String _pass;
private String[] _to;
private String _from;
private String _port;
private String _sport;
private String _host;
private String _subject;
private String _body;
private boolean _auth;
private boolean _debuggable;
private Multipart _multipart;
public Mail() {
_host = "smtp.gmail.com"; // default smtp server
_port = "465"; // default smtp port
_sport = "465"; // default socketfactory port
_user = ""; // username
_pass = ""; // password
_from = ""; // email sent from
_subject = ""; // email subject
_body = ""; // email body
_debuggable = false; // debug mode on or off - default off
_auth = true; // smtp authentication - default on
_multipart = new MimeMultipart();
// There is something wrong with MailCap, javamail can not find a handler for the multipart/mixed part, so this bit needs to be added.
MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();
mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
mc.addMailcap("text/plain;; x-java-content- handler=com.sun.mail.handlers.text_plain");
mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
CommandMap.setDefaultCommandMap(mc);
}
public Mail(String user, String pass) {
this();
_user = user;
_pass = pass;
}
public Mail(EditText user, EditText pass)
{
_userE = user;
_passE = pass;
}
public boolean send() throws Exception {
Properties props = _setProperties();
if(!_user.equals("") && !_pass.equals("") && _to.length > 0 && !_from.equals("") && !_subject.equals("") && !_body.equals("")) {
Session session = Session.getInstance(props, this);
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(_from));
InternetAddress[] addressTo = new InternetAddress[_to.length];
for (int i = 0; i < _to.length; i++) {
addressTo[i] = new InternetAddress(_to[i]);
}
msg.setRecipients(MimeMessage.RecipientType.TO, addressTo);
msg.setSubject(_subject);
msg.setSentDate(new Date());
// setup message body
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText(_body);
_multipart.addBodyPart(messageBodyPart);
// Put parts in message
msg.setContent(_multipart);
// send email
Transport.send(msg);
return true;
} else {
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);
_multipart.addBodyPart(messageBodyPart);
}
@Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(_user, _pass);
}
private Properties _setProperties() {
Properties props = new Properties();
props.put("mail.smtp.host", _host);
if(_debuggable) {
props.put("mail.debug", "true");
}
if(_auth) {
props.put("mail.smtp.auth", "true");
}
props.put("mail.smtp.port", _port);
props.put("mail.smtp.socketFactory.port", _sport);
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback", "false");
return props;
}
// the getters and setters
public String getBody() {
return _body;
}
public void setBody(String _body) {
this._body = _body;
}
public void setSubject(String _subject)
{
this._subject = _subject;
}
public void setFrom(String _from)
{
this._from = _from;
}
public void setTo(String[] _to)
{
this._to = _to;
}
// more of the getters and setters …..
}
最后，这里是我的logcat
06-21 12:42:32.049: E/dalvikvm(1079): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
06-21 12:42:32.859: E/dalvikvm(1079): Could not find class 'com.dummies.android.MailTest.Mail', referenced from method com.dummies.android.MailTest.MailTestActivity$1.onClick
06-21 12:42:36.820: E/AndroidRuntime(1079): FATAL EXCEPTION: main
06-21 12:42:36.820: E/AndroidRuntime(1079): java.lang.NoClassDefFoundError: com.dummies.android.MailTest.Mail
06-21 12:42:36.820: E/AndroidRuntime(1079): at com.dummies.android.MailTest.MailTestActivity$1.onClick(MailTestActivity.java:30)
06-21 12:42:36.820: E/AndroidRuntime(1079): at android.view.View.performClick(View.java:3511)
06-21 12:42:36.820: E/AndroidRuntime(1079): at android.view.View$PerformClick.run(View.java:14105)
06-21 12:42:36.820: E/AndroidRuntime(1079): at android.os.Handler.handleCallback(Handler.java:605)
06-21 12:42:36.820: E/AndroidRuntime(1079): at android.os.Handler.dispatchMessage(Handler.java:92)
06-21 12:42:36.820: E/AndroidRuntime(1079): at android.os.Looper.loop(Looper.java:137)
06-21 12:42:36.820: E/AndroidRuntime(1079): at android.app.ActivityThread.main(ActivityThread.java:4424)
06-21 12:42:36.820: E/AndroidRuntime(1079): at java.lang.reflect.Method.invokeNative(Native Method)
06-21 12:42:36.820: E/AndroidRuntime(1079): at java.lang.reflect.Method.invoke(Method.java:511)
06-21 12:42:36.820: E/AndroidRuntime(1079): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
06-21 12:42:36.820: E/AndroidRuntime(1079): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
06-21 12:42:36.820: E/AndroidRuntime(1079): at dalvik.system.NativeStart.main(Native Method)
编辑：由于没有编辑正在给我的代码所做的，我没有得到改为NoClassDefFoundError。这两个类都直接添加到包下的src文件夹中，这两个代码都不是外部添加的。那么，为什么我现在得到这个错误？
我认为他们是在正确的地方，这两个类都在src文件夹内，并在同一个包中。那应该是课程的正确场所，如果不是的话？ – user1457104