我有一个 android 应用注册表单，它必须向用户发送成功的注册电子邮件，但是 onClick 提交按钮，当我调用该类时，我收到以下错误：
FATAL EXCEPTION: AsyncTask #1
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:200)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
at java.lang.Thread.run(Thread.java:1019)
Caused by: java.lang.NoClassDefFoundError: net.asdqwe.utilities.Mail
at net.asdqwe.utilities.EmailSender.sendEmail(EmailSender.java:8)
at net.asdqwe.activities.Signup$sendVerificationEmail.doInBackground(Signup.java:308)
at net.asdqwe.activities.Signup$sendVerificationEmail.doInBackground(Signup.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:185)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
... 4 more
这是调用它的代码：
public class Signup extends Activity implements OnClickListener, {
@Override
public void onClick(View arg0) {
//some irrelevant code here
Intent signupSuccessAvatarUpload = new Intent(getApplicationContext(), SignupSuccessAvatarUpload.class);
signupSuccessAvatarUpload.putExtra("userEmailID", userEmail);
try {
new sendVerificationEmail().execute();
} catch (Exception e) {}
addNewContact();
startActivityForResult(signupSuccessAvatarUpload, 1);
//finish();
}
class sendVerificationEmail extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
try {
emailSender.sendEmail(userEmail, configurationz.EMAIL_OFFICIAL_ADDRESS, configurationz.EMAIL_SUCCESSFUL_SIGNUP_SUBJECT, configurationz.EMAIL_SUCCESSFUL_SIGNUP_BODY(userName), null);
} catch (Exception e) {}
return null;
}
}
}
这是电子邮件发件人类：
package net.asdqwe.utilities;
import net.asdqwe.utilities.Mail;
public class EmailSender {
public boolean sendEmail(String to, String from, String subject, String message, String[] attachements) throws Exception {
Mail mail = new Mail();
//code here
}
在同一个包中有 Mail 类：
public class Mail extends javax.mail.Authenticator {
//lots of code here
public Mail() {
host = "smtp.googlemail.com"; // default smtp server
port = "465"; // default smtp port
sport = "465"; // default socketfactory port
user = ""; // username
password = ""; // 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();
this.user = user;
password = pass;
}
}