在Android中发送电子邮件而无需用户干预（无意图）

Question

我想直接发送邮件而没有Intent。 我已经下载了必要的文件，添加到我的库中。 但是，当我单击提交按钮时，程序已停止。 不知道是什么问题？

Java代码：

package com.kpbird.sendemail;
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 SendEmail extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button send=(Button)findViewById(R.id.button_send);
    send.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            Mail m = new Mail("<USER EMAIL>", "<PASSWORD>"); 
            String[] toArr = {"<EMAIL-1>", "<EMAIL-2>"}; 
            m.setTo(toArr); 
            m.setFrom("<EMAIL>"); 
            m.setSubject("This is an email sent using my Mail JavaMail wrapper from an Android device."); 
            m.setBody("Email body"); 
            try { 
              m.addAttachment("/sdcard/bday.jpg"); 
              if(m.send()) { 
                Toast.makeText(getBaseContext(), "Email was sent successfully.", Toast.LENGTH_LONG).show(); 
              } else { 
                Toast.makeText(getBaseContext(), "Email was not sent.", Toast.LENGTH_LONG).show(); 
              } 
            } catch(Exception e) { 
              Log.e("MailApp", "Could not send email", e); 
            } 
        }
    });

}
 }

我也有一个文件Mail.java

package com.kpbird.sendemail;
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 void setTo(String[] toArr){
     _to = toArr;
 }

 public void setFrom(String from){
     _from = from;
 }
 public void setSubject(String subject){
     _subject = subject;
 }

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;
}
  //    static {   
   //        Security.addProvider(new com.indianic.email.JSSEProvider());   
   //    }  

    // more of the getters and setters É..
 }

在我的程序中。

LogCat是：

02-03 15:40:56.957: E/AndroidRuntime(19523): FATAL EXCEPTION: main
02-03 15:40:56.957: E/AndroidRuntime(19523): java.lang.NoClassDefFoundError: com.kpbird.sendemail.Mail
02-03 15:40:56.957: E/AndroidRuntime(19523):    at com.kpbird.sendemail.SendEmail$1.onClick(SendEmail.java:23)
02-03 15:40:56.957: E/AndroidRuntime(19523):    at android.view.View.performClick(View.java:3574)
02-03 15:40:56.957: E/AndroidRuntime(19523):    at android.view.View$PerformClick.run(View.java:14293)
02-03 15:40:56.957: E/AndroidRuntime(19523):    at android.os.Handler.handleCallback(Handler.java:605)
02-03 15:40:56.957: E/AndroidRuntime(19523):    at android.os.Handler.dispatchMessage(Handler.java:92)
 02-03 15:40:56.957: E/AndroidRuntime(19523):   at android.os.Looper.loop(Looper.java:137)
 02-03 15:40:56.957: E/AndroidRuntime(19523):   at android.app.ActivityThread.main(ActivityThread.java:4448)
 02-03 15:40:56.957: E/AndroidRuntime(19523):   at java.lang.reflect.Method.invokeNative(Native Method)
 02-03 15:40:56.957: E/AndroidRuntime(19523):   at java.lang.reflect.Method.invoke(Method.java:511)
 02-03 15:40:56.957: E/AndroidRuntime(19523):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
 02-03 15:40:56.957: E/AndroidRuntime(19523):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
 02-03 15:40:56.957: E/AndroidRuntime(19523):   at dalvik.system.NativeStart.main(Native Method)

Answer 1

Right click your Project -> Properties -> Java Build Path -> Order & Export

到达此处后，请使用您所使用的库，“选择”这些库并将它们移到列表顶部。 即假设您已使用“ xyz.jar”文件，则将按照以下顺序进行操作。

[x] xyz.jar
[x] Android xx
[x] Android依赖关系....

保存更改并在清理后重建项目。

建议

我认为邮件类别名称有冲突。 尝试使用MyMail更改班级名称，然后尝试。