Question

我正在开发一个应用程序，我想发送一封电子邮件而不通过默认程序＆amp;没有用户互动。

我有以下代码，但它没有用。我读了更多关于这个问题的内容，我发现我应该使用“thread”或“AsyncTask”。但是，我不知道如何正确使用它们。

以下是代码：

MainActivity.java：

package com.example.dialup;

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

import android.util.Log;


public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_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", "pass");
                        sender.sendMail("Subject",   
                                "Body",   
                                "blabla@gmail.com",   
                                "blabla@yahoo.com"); 
                        System.out.println("Email sent");

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

                }
            });} }

JSSEProvider.java

package com.example.dialup;


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;
            }
        });
    }
}

GMailSender.java

package com.example.dialup;


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.example.dialup.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");   
        }   
    }   
}

这是LogCat

12-27 13:33:46.589: E/Trace(8410): error opening trace file: No such file or directory (2)
12-27 13:33:46.729: E/SensorManager(8410): thread start
12-27 13:33:46.729: D/SensorManager(8410): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42bfd9b8
12-27 13:33:46.739: D/SensorManager(8410): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42bfd9b8
12-27 13:33:46.739: D/Sensors(8410): Remain listener = Sending .. normal delay 200ms
12-27 13:33:46.739: I/Sensors(8410): sendDelay --- 200000000
12-27 13:33:46.739: D/SensorManager(8410): JNI - sendDelay
12-27 13:33:46.739: I/SensorManager(8410): Set normal delay = true
12-27 13:33:46.754: D/SensorManager(8410): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42bfd9b8
12-27 13:33:46.784: D/libEGL(8410): loaded /system/lib/egl/libEGL_mali.so
12-27 13:33:46.789: D/libEGL(8410): loaded /system/lib/egl/libGLESv1_CM_mali.so
12-27 13:33:46.794: D/libEGL(8410): loaded /system/lib/egl/libGLESv2_mali.so
12-27 13:33:46.799: D/(8410): Device driver API match
12-27 13:33:46.799: D/(8410): Device driver API version: 10
12-27 13:33:46.799: D/(8410): User space API version: 10 
12-27 13:33:46.799: D/(8410): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Fri Sep 28 10:42:56 KST 2012 
12-27 13:33:46.834: D/OpenGLRenderer(8410): Enabling debug mode 0
12-27 13:34:04.184: D/SensorManager(8410): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42bfd9b8
12-27 13:34:04.184: D/Sensors(8410): Remain listener = Sending .. normal delay 200ms
12-27 13:34:04.184: I/Sensors(8410): sendDelay --- 200000000
12-27 13:34:04.184: D/SensorManager(8410): JNI - sendDelay
12-27 13:34:04.184: I/SensorManager(8410): Set normal delay = true
12-27 13:34:06.034: D/SensorManager(8410): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42bfd9b8
12-27 13:34:37.794: D/SensorManager(8410): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42bfd9b8
12-27 13:34:37.794: D/Sensors(8410): Remain listener = Sending .. normal delay 200ms
12-27 13:34:37.794: I/Sensors(8410): sendDelay --- 200000000
12-27 13:34:37.794: D/SensorManager(8410): JNI - sendDelay
12-27 13:34:37.794: I/SensorManager(8410): Set normal delay = true
12-27 13:34:37.924: D/SensorManager(8410): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42c3a088
12-27 13:34:37.944: D/dalvikvm(8410): GC_CONCURRENT freed 190K, 7% free 12382K/13191K, paused 3ms+13ms, total 35ms
12-27 13:34:37.954: D/SensorManager(8410): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42c3a088
12-27 13:34:37.954: D/Sensors(8410): Remain listener = Sending .. normal delay 200ms
12-27 13:34:37.954: I/Sensors(8410): sendDelay --- 200000000
12-27 13:34:37.954: D/SensorManager(8410): JNI - sendDelay
12-27 13:34:37.954: I/SensorManager(8410): Set normal delay = true
12-27 13:34:37.959: W/IInputConnectionWrapper(8410): showStatusIcon on inactive InputConnection
12-27 13:34:37.964: D/SensorManager(8410): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42c3a088
12-27 13:34:38.069: W/IInputConnectionWrapper(8410): getSelectedText on inactive InputConnection
12-27 13:34:38.074: W/IInputConnectionWrapper(8410): setComposingText on inactive InputConnection
12-27 13:34:45.439: D/SensorManager(8410): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42c3a088
12-27 13:34:45.439: D/Sensors(8410): Remain listener = Sending .. normal delay 200ms
12-27 13:34:45.439: I/Sensors(8410): sendDelay --- 200000000
12-27 13:34:45.439: D/SensorManager(8410): JNI - sendDelay
12-27 13:34:45.439: I/SensorManager(8410): Set normal delay = true
12-27 13:34:45.504: W/IInputConnectionWrapper(8410): getSelectedText on inactive InputConnection
12-27 13:34:45.504: W/IInputConnectionWrapper(8410): setComposingText on inactive InputConnection
12-27 13:35:01.614: W/IInputConnectionWrapper(8410): showStatusIcon on inactive InputConnection
12-27 13:35:01.874: D/SensorManager(8410): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42c184e8
12-27 13:35:01.924: D/SensorManager(8410): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42c184e8
12-27 13:35:01.924: D/Sensors(8410): Remain listener = Sending .. normal delay 200ms
12-27 13:35:01.924: I/Sensors(8410): sendDelay --- 200000000
12-27 13:35:01.944: D/SensorManager(8410): JNI - sendDelay
12-27 13:35:01.944: I/SensorManager(8410): Set normal delay = true
12-27 13:35:01.954: D/SensorManager(8410): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@42c184e8

那么如何使用“thread”或“AsyncTask”来使其工作？

Answer 1

在android AsyncTask doInBackground方法中使用此代码。

                try {   


                    GMailSender sender = new GMailSender("username", "pass");
                    sender.sendMail("Subject",   
                            "Body",   
                            "blabla@gmail.com",   
                            "blabla@yahoo.com"); 
                    System.out.println("Email sent");

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

Answer 2

首先检查您是否在清单中添加了Internet权限。

然后检查您是否在您的Android项目中添加了3个罐子

如果您没有这些罐子，可以从这里进行装载。

Click here - How to add External Jars

如何使用“线程”或“AsyncTask”发送电子邮件而不显示Android中的默认电子邮件

2 个答案: