使用SMTP在没有意图的情况下在android中发送邮件

Sending mail in android without intents using SMTP

提问by Naveed

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? [email protected] is the recipient. [email protected] is the sender.I have hard coded the subject and the body of the mail.

嗨，我正在开发一个 android 应用程序，它将通过单击按钮发送邮件。代码起初工作但由于某种原因它现在不工作。任何人都可以帮我解决这个问题吗？ [email protected] 是收件人。[email protected] 是发件人。我对邮件的主题和正文进行了硬编码。

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 = "[email protected]";
private static final String password = "000000";
private static final String emailid = "[email protected]";
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("[email protected]", "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;
    }
}
}

回答by Jo?o Marcos

Put in your manifest file,

放入你的清单文件，

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

check if you have internet connection,

检查您是否有互联网连接，

public boolean isOnline() {
    ConnectivityManager cm =
        (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netInfo = cm.getActiveNetworkInfo();
    if (netInfo != null && netInfo.isConnectedOrConnecting()) {
        return true;
    }
    return false;
}

and finnaly use this code to send email

并最终使用此代码发送电子邮件

final String username = "[email protected]";
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("[email protected]"));
        message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse("[email protected]"));
        message.setSubject("Testing Subject");
        message.setText("Dear Mail Crawler,"
            + "\n\n 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);
    }

回答by Manthan Patel

config gradle as per below define get reference from Here

按照下面的配置 gradle 定义从这里获取参考

repositories { 
     jcenter()
     maven {
         url "https://maven.java.net/content/groups/public/"
     }
}

dependencies {
     compile 'com.sun.mail:android-mail:1.5.5'
     compile 'com.sun.mail:android-activation:1.5.5'
}

android {
   packagingOptions {
       pickFirst 'META-INF/LICENSE.txt' // picks the JavaMail license file
   }
}

Add this async task to send mail

添加此异步任务以发送邮件

 public class sendemail extends AsyncTask<String, Integer, Integer> {

    ProgressDialog progressDialog;
    private StringBuilder all_email;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        progressDialog = new ProgressDialog(GetuserActivity.this);
        progressDialog.setMessage("Uploading, please wait...");
        progressDialog.show();
        if (selecteduser_arr != null) {
            all_email = new StringBuilder();
            for (int i = 0; i < selecteduser_arr.size(); i++) {
                if (i == 0) {
                    all_email.append(selecteduser_arr.get(i));
                } else {
                    String temp = "," + selecteduser_arr.get(i);
                    all_email.append(temp);
                }
            }
        }
    }

    @Override
    protected Integer doInBackground(String... strings) {

        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.socketFactory.class",
                "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.port", "465");

        Session session = Session.getDefaultInstance(props,
                new javax.mail.Authenticator() {
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication("enterhereyouremail", "enterherepassword");
                    }
                });

        try {

            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("enterhereyouremail"));
            message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse("[email protected],[email protected]"));
            message.setSubject("Testing Subject");
            message.setText("Dear Mail Crawler," +
                    "\n\n No spam to my email, please!");

            Transport.send(message);

            System.out.println("Done");

        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }
        return 1;
    }

    @Override
    protected void onPostExecute(Integer integer) {
        super.onPostExecute(integer);
        progressDialog.dismiss();
    }
}

回答by Nishanthi Grashia

Since you say it worked previously, your app should already be having internet permission and other necessary permissions.

既然你说它以前有效，你的应用程序应该已经拥有互联网权限和其他必要的权限。

1. Check if the current phone you are trying has proper mobile Data /Internet
2. If connected via wi-fi, check if any new firewall restriction is not allowing the mail to be sent.

1. 检查您当前使用的手机是否有适当的移动数据/互联网
2. 如果通过 wi-fi 连接，请检查是否有任何新的防火墙限制不允许发送邮件。

回答by Ludger

Try to use port 465

尝试使用 465 端口

 private Session createSessionObject()
    {
        Properties properties = new Properties();
        properties.setProperty("mail.smtp.auth", "true");
        properties.setProperty("mail.smtp.starttls.enable", "true");
        properties.setProperty("mail.smtp.host", "smtp.gmail.com");
        properties.setProperty("mail.smtp.port", "465");

        return Session.getInstance(properties, new javax.mail.Authenticator()
        {
            protected PasswordAuthentication getPasswordAuthentication()
            {
                return new PasswordAuthentication(username, password);
            }
        });
    }