Enviar correo electrónico en el servicio (sin preguntar al usuario)

Question

es posible que envíe un correo electrónico en segundo plano mediante el servicio ... como en el servicio utilizo Intento con ACTION_SENDTO con URI data mailto: recipient_email y se envía en segundo plano sin intervención del usuario .. o a través de la aplicación de correo electrónico predeterminada sin preguntar al usuario ...

Answer 1

La mejor solución es usar la cuenta de Gmail para enviar el correo electrónico.

En términos generales:

1. descarga mail.jar y activation.jar para android https://code.google.com/p/javamail-android/
2. conectarse a Gmail para obtener el token de OAuth
3. Envía el correo

aquí está el código

import java.util.Properties; 

import javax.activation.DataHandler; 
import javax.mail.Message; 
import javax.mail.Session; 
import javax.mail.URLName; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeMessage; 
import javax.mail.util.ByteArrayDataSource; 

import android.accounts.Account; 
import android.accounts.AccountManager; 
import android.accounts.AccountManagerCallback; 
import android.accounts.AccountManagerFuture; 
import android.app.Activity; 
import android.os.Bundle; 
import android.os.StrictMode; 
import android.util.Log; 

import com.sun.mail.smtp.SMTPTransport; 
import com.sun.mail.util.BASE64EncoderStream; 

public class GMailSender { 
    private Session session; 
    private String token; 


    public String getToken() { 
     return token; 
    } 

    public GMailSender(Activity ctx) { 
     super(); 
     initToken(ctx); 
    } 

    public void initToken(Activity ctx) { 

     AccountManager am = AccountManager.get(ctx); 

     Account[] accounts = am.getAccountsByType("com.google"); 
     for (Account account : accounts) { 
      Log.d("getToken", "account="+account); 
     } 

     Account me = accounts[0]; //You need to get a google account on the device, it changes if you have more than one 


     am.getAuthToken(me, "oauth2:https://mail.google.com/", null, ctx, new AccountManagerCallback<Bundle>(){ 
      @Override 
      public void run(AccountManagerFuture<Bundle> result){ 
       try{ 
        Bundle bundle = result.getResult(); 
        token = bundle.getString(AccountManager.KEY_AUTHTOKEN); 
        Log.d("initToken callback", "token="+token);  

       } catch (Exception e){ 
        Log.d("test", e.getMessage()); 
       } 
      } 
     }, null); 

     Log.d("getToken", "token="+token); 
    } 



    public SMTPTransport connectToSmtp(String host, int port, String userEmail, 
      String oauthToken, boolean debug) throws Exception { 

     Properties props = new Properties(); 
     props.put("mail.smtp.starttls.enable", "true"); 
     props.put("mail.smtp.starttls.required", "true"); 
     props.put("mail.smtp.sasl.enable", "false"); 

     session = Session.getInstance(props); 
     session.setDebug(debug); 

     final URLName unusedUrlName = null; 
     SMTPTransport transport = new SMTPTransport(session, unusedUrlName); 
     // If the password is non-null, SMTP tries to do AUTH LOGIN. 
     final String emptyPassword = null; 

     /* enable if you use this code on an Activity (just for test) or use the AsyncTask 
     StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); 
     StrictMode.setThreadPolicy(policy); 
     */ 

     transport.connect(host, port, userEmail, emptyPassword); 

     byte[] response = String.format("user=%s\1auth=Bearer %s\1\1", 
       userEmail, oauthToken).getBytes(); 
     response = BASE64EncoderStream.encode(response); 

     transport.issueCommand("AUTH XOAUTH2 " + new String(response), 235); 

     return transport; 
    } 

    public synchronized void sendMail(String subject, String body, String user, 
      String oauthToken, String recipients) { 
     try { 

      SMTPTransport smtpTransport = connectToSmtp("smtp.gmail.com", 587, 
        user, oauthToken, true); 

      MimeMessage message = new MimeMessage(session); 
      DataHandler handler = new DataHandler(new ByteArrayDataSource(
        body.getBytes(), "text/plain")); 
      message.setSender(new InternetAddress(user)); 
      message.setSubject(subject); 
      message.setDataHandler(handler); 
      if (recipients.indexOf(',') > 0) 
       message.setRecipients(Message.RecipientType.TO, 
         InternetAddress.parse(recipients)); 
      else 
       message.setRecipient(Message.RecipientType.TO, 
         new InternetAddress(recipients)); 
      smtpTransport.sendMessage(message, message.getAllRecipients()); 

     } catch (Exception e) { 
      Log.d("test", e.getMessage(), e); 
     } 
    } 

} 

este código fue publicado originalmente aquí Javamail api in android using XOauth.

Tenga en cuenta que para obtener el token de OAuth necesita una Actividad y debe preguntar al usuario qué cuenta usar. El token debe recuperarse durante la fase OnCreate y guardarse en las preferencias. Consulte también How to get the Android device's primary e-mail address

Alternativamente, puede usar mail.jar pero debe solicitar al usuario su nombre de usuario y contraseña.

Answer 2

Luego tiene que hacerlo programáticamente. Aquí hay un tutorial para eso http://nilvec.com/sending-email-without-user-interaction-in-android/

Answer 3

Enviar correo electrónico en Android con la API JavaMail mediante la autenticación de Gmail

Pasos para crear un proyecto de ejemplo:

MailSenderActivity.java

YOUR PACKAGE; 

import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.Button; 

public class MailSenderActivity extends Activity { 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     final Button send = (Button) this.findViewById(R.id.send); 
     send.setOnClickListener(new View.OnClickListener() { 

      public void onClick(View v) { 
       // TODO Auto-generated method stub 

       try { 
        GMailSender sender = new GMailSender("username@gmail.com", "password"); 
        sender.sendMail("This is Subject", 
          "This is Body", 
          "user@gmail.com", 
          "user@yahoo.com"); 
       } catch (Exception e) { 
        Log.e("SendMail", e.getMessage(), e); 
       } 

      } 
     }); 

    } 
} 

GMailSender.java

YOUR PACKAGE; 

import javax.activation.DataHandler; 
import javax.activation.DataSource; 
import javax.mail.Message; 
import javax.mail.PasswordAuthentication; 
import javax.mail.Session; 
import javax.mail.Transport; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeMessage; 
import java.io.ByteArrayInputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.OutputStream; 
import java.security.Security; 
import java.util.Properties; 

public class GMailSender extends javax.mail.Authenticator { 
    private String mailhost = "smtp.gmail.com"; 
    private String user; 
    private String password; 
    private Session session; 

    static { 
     Security.addProvider(new com.provider.JSSEProvider()); 
    } 

    public GMailSender(String user, String password) { 
     this.user = user; 
     this.password = password; 

     Properties props = new Properties(); 
     props.setProperty("mail.transport.protocol", "smtp"); 
     props.setProperty("mail.host", mailhost); 
     props.put("mail.smtp.auth", "true"); 
     props.put("mail.smtp.port", "465"); 
     props.put("mail.smtp.socketFactory.port", "465"); 
     props.put("mail.smtp.socketFactory.class", 
       "javax.net.ssl.SSLSocketFactory"); 
     props.put("mail.smtp.socketFactory.fallback", "false"); 
     props.setProperty("mail.smtp.quitwait", "false"); 

     session = Session.getDefaultInstance(props, this); 
    } 

    protected PasswordAuthentication getPasswordAuthentication() { 
     return new PasswordAuthentication(user, password); 
    } 

    public synchronized void sendMail(String subject, String body, String sender, String recipients) throws Exception { 
     try{ 
     MimeMessage message = new MimeMessage(session); 
     DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain")); 
     message.setSender(new InternetAddress(sender)); 
     message.setSubject(subject); 
     message.setDataHandler(handler); 
     if (recipients.indexOf(',') > 0) 
      message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients)); 
     else 
      message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients)); 
     Transport.send(message); 
     }catch(Exception e){ 

     } 
    } 

    public class ByteArrayDataSource implements DataSource { 
     private byte[] data; 
     private String type; 

     public ByteArrayDataSource(byte[] data, String type) { 
      super(); 
      this.data = data; 
      this.type = type; 
     } 

     public ByteArrayDataSource(byte[] data) { 
      super(); 
      this.data = data; 
     } 

     public void setType(String type) { 
      this.type = type; 
     } 

     public String getContentType() { 
      if (type == null) 
       return "application/octet-stream"; 
      else 
       return type; 
     } 

     public InputStream getInputStream() throws IOException { 
      return new ByteArrayInputStream(data); 
     } 

     public String getName() { 
      return "ByteArrayDataSource"; 
     } 

     public OutputStream getOutputStream() throws IOException { 
      throw new IOException("Not Supported"); 
     } 
    } 
} 

J Proveedor SSE

JSSEProvider.java

/* 
* Licensed to the Apache Software Foundation (ASF) under one or more 
* contributor license agreements. See the NOTICE file distributed with 
* this work for additional information regarding copyright ownership. 
* The ASF licenses this file to You under the Apache License, Version 2.0 
* (the "License"); you may not use this file except in compliance with 
* the License. You may obtain a copy of the License at 
* 
*  http://www.apache.org/licenses/LICENSE-2.0 
* 
* Unless required by applicable law or agreed to in writing, software 
* distributed under the License is distributed on an "AS IS" BASIS, 
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
* See the License for the specific language governing permissions and 
* limitations under the License. 
*/ 

/** 
* @author Alexander Y. Kleymenov 
* @version $Revision$ 
*/ 


import java.security.AccessController; 
import java.security.Provider; 

public final class JSSEProvider extends Provider { 

    public JSSEProvider() { 
     super("HarmonyJSSE", 1.0, "Harmony JSSE Provider"); 
     AccessController.doPrivileged(new java.security.PrivilegedAction<Void>() { 
      public Void run() { 
       put("SSLContext.TLS", 
         "org.apache.harmony.xnet.provider.jsse.SSLContextImpl"); 
       put("Alg.Alias.SSLContext.TLSv1", "TLS"); 
       put("KeyManagerFactory.X509", 
         "org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl"); 
       put("TrustManagerFactory.X509", 
         "org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl"); 
       return null; 
      } 
     }); 
    } 
} 

añadir 3 frascos que se encuentran en el siguiente enlace a su proyecto Android

• mail.jar
• activation.jar
• additional.jar

Click here - How to add External Jars

y no se olvide de añadir esta línea en su manifiesto:

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

ejecutar el proyecto y comprobar su cuenta de correo del destinatario para el correo. ¡Saludos!

Esperanza esto ayuda

P. S. Y no olvide que no puede hacer operaciones de red desde ninguna actividad en Android. Por lo tanto, se recomienda utilizar AsyncTask o IntentService para evitar la red en la excepción del hilo principal.

archivos Jar: https://code.google.com/p/javamail-android/