您好，我正在开发一个 Android 应用程序，该应用程序将通过单击按钮发送邮件.代码起初可以工作，但由于某种原因它现在不能工作.谁能帮我解决这个问题?xyz@outlook.com 是收件人.abc@gmail.com 是发件人.我已经对邮件的主题和正文进行了硬编码.
Hi I am developing an android app which will send mail on click of a button. Code worked at first but due to some reason its not working now. Could anyone please help me with this? xyz@outlook.com is the recipient. abc@gmail.com is the sender. I have hard coded the subject and the body of the mail.
package com.example.clc_construction;
import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
public class Email extends Activity
{
public String jobNo;
public String teamNo;
private static final String username = "abc@gmail.com";
private static final String password = "000000";
private static final String emailid = "xyz@outlook.com";
private static final String subject = "Photo";
private static final String message = "Hello";
private Multipart multipart = new MimeMultipart();
private MimeBodyPart messageBodyPart = new MimeBodyPart();
public File mediaFile;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_screen);
Intent intent = getIntent();
jobNo = intent.getStringExtra("Job_No");
teamNo = intent.getStringExtra("Team_No");
sendMail(emailid,subject,message);
}
private void sendMail(String email, String subject, String messageBody)
{
Session session = createSessionObject();
try {
Message message = createMessage(email, subject, messageBody, session);
new SendMailTask().execute(message);
}
catch (AddressException e)
{
e.printStackTrace();
}
catch (MessagingException e)
{
e.printStackTrace();
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
}
private Session createSessionObject()
{
Properties properties = new Properties();
properties.put("mail.smtp.auth", "true");
properties.put("mail.smtp.starttls.enable", "true");
properties.put("mail.smtp.host", "smtp.gmail.com");
properties.put("mail.smtp.port", "587");
return Session.getInstance(properties, new javax.mail.Authenticator()
{
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(username, password);
}
});
}
private Message createMessage(String email, String subject, String messageBody, Session session) throws
MessagingException, UnsupportedEncodingException
{
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("xzy@outlook.com", "Naveed Qureshi"));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(email, email));
message.setSubject(subject);
message.setText(messageBody);
return message;
}
public class SendMailTask extends AsyncTask<Message, Void, Void>
{
private ProgressDialog progressDialog;
@Override
protected void onPreExecute()
{
super.onPreExecute();
progressDialog = ProgressDialog.show(Email.this, "Please wait", "Sending mail", true, false);
}
@Override
protected void onPostExecute(Void aVoid)
{
super.onPostExecute(aVoid);
progressDialog.dismiss();
}
protected Void doInBackground(javax.mail.Message... messages)
{
try
{
Transport.send(messages[0]);
} catch (MessagingException e)
{
e.printStackTrace();
}
return null;
}
}
}
放入你的清单文件，
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
检查您是否有互联网连接，
check if you have internet connection,
public boolean isOnline() {
ConnectivityManager cm =
(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting()) {
return true;
}
return false;
}
并最终使用此代码发送电子邮件
and finnaly use this code to send email
final String username = "username@gmail.com";
final String password = "password";
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");
Session session = Session.getInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
try {
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("from-email@gmail.com"));
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse("to-email@gmail.com"));
message.setSubject("Testing Subject");
message.setText("Dear Mail Crawler,"
+ "
No spam to my email, please!");
MimeBodyPart messageBodyPart = new MimeBodyPart();
Multipart multipart = new MimeMultipart();
messageBodyPart = new MimeBodyPart();
String file = "path of file to be attached";
String fileName = "attachmentName"
DataSource source = new FileDataSource(file);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(fileName);
multipart.addBodyPart(messageBodyPart);
message.setContent(multipart);
Transport.send(message);
System.out.println("Done");
} catch (MessagingException e) {
throw new RuntimeException(e);
}
这篇关于使用 SMTP 在没有意图的情况下在 android 中发送邮件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！