I’m developing an application and I want to send an email without going through the default procedure & without the user interaction.
I have the following code, but it didn’t work.
I read more about the problem and I figured out that I should use “thread” or “AsyncTask “. However, I dunno how to use them exactly.
Here is the code:
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");
}
}
}
and here is the 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
So how can I use “thread” or “AsyncTask ” to make it work?
Use this code in android AsyncTask doInBackground method.