我正在尝试使用此处找到的代码
从 Android 应用程序发送电子邮件。
我正在使用 ADT Build 22.0.5
我见过很多人有这个问题，但出于不同的原因，我真的无法理解它。
这是完整的错误日志
09-14 15:53:49.001: E/AndroidRuntime(4611): FATAL EXCEPTION: main
09-14 15:53:49.001: E/AndroidRuntime(4611): java.lang.IllegalStateException: Could not execute method of the activity
09-14 15:53:49.001: E/AndroidRuntime(4611): at android.view.View$1.onClick(View.java:3599)
09-14 15:53:49.001: E/AndroidRuntime(4611): at android.view.View.performClick(View.java:4204)
09-14 15:53:49.001: E/AndroidRuntime(4611): at android.view.View$PerformClick.run(View.java:17355)
09-14 15:53:49.001: E/AndroidRuntime(4611): at android.os.Handler.handleCallback(Handler.java:725)
09-14 15:53:49.001: E/AndroidRuntime(4611): at android.os.Handler.dispatchMessage(Handler.java:92)
09-14 15:53:49.001: E/AndroidRuntime(4611): at android.os.Looper.loop(Looper.java:137)
09-14 15:53:49.001: E/AndroidRuntime(4611): at android.app.ActivityThread.main(ActivityThread.java:5041)
09-14 15:53:49.001: E/AndroidRuntime(4611): at java.lang.reflect.Method.invokeNative(Native Method)
09-14 15:53:49.001: E/AndroidRuntime(4611): at java.lang.reflect.Method.invoke(Method.java:511)
09-14 15:53:49.001: E/AndroidRuntime(4611): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
09-14 15:53:49.001: E/AndroidRuntime(4611): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
09-14 15:53:49.001: E/AndroidRuntime(4611): at dalvik.system.NativeStart.main(Native Method)
09-14 15:53:49.001: E/AndroidRuntime(4611): Caused by: java.lang.reflect.InvocationTargetException
09-14 15:53:49.001: E/AndroidRuntime(4611): at java.lang.reflect.Method.invokeNative(Native Method)
09-14 15:53:49.001: E/AndroidRuntime(4611): at java.lang.reflect.Method.invoke(Method.java:511)
09-14 15:53:49.001: E/AndroidRuntime(4611): at android.view.View$1.onClick(View.java:3594)
09-14 15:53:49.001: E/AndroidRuntime(4611): ... 11 more
09-14 15:53:49.001: E/AndroidRuntime(4611): Caused by: java.lang.NoClassDefFoundError: com.example.naghe.Mail
09-14 15:53:49.001: E/AndroidRuntime(4611): at com.example.naghe.NagheMainActivity.sendMessage(NagheMainActivity.java:21)
这是我的主要活动
package com.example.naghe;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class NagheMainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_naghe_main);
}
public void sendMessage (View view) {
Mail m = new Mail("test", "test");
String[] toArr = {"mail};
m.setTo(toArr);
m.setFrom("wooo@wooo.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(NagheMainActivity.this, "Email was sent successfully.", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(NagheMainActivity.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);
}
}
}
这是 XML，它只是一个按钮，因为我正在测试它
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".NagheMainActivity" >
<Button
android:id="@+id/send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="84dp"
android:onClick="sendMessage"
android:text="Button" />
</RelativeLayout>
是的，我的项目中确实有邮件类。您可以在这篇文章的第一个链接上找到该课程，但在这里
邮件.java
package com.example.naghe;
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 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 setTo(String[] _to) {
this._to = _to;
}
public void setFrom(String _from){
this._from = _from;
}
public void setSubject(String _subject){
this._subject = _subject;
}
// more of the getters and setters …..
}
任何帮助都会非常感激！