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POSecond time Authentication fails Java Mail API
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copied!<p>Well i put my gmail address and my pass in 2 EditTexts and when i click the OK button i try to send a mail in my gmail account with the java mail api. BUT if i put wrong data it doesn't authenticate and thus i do not send the email. If i start again the application and use the real data then it fails to authenticate again. Do i do something wrong or that is the way things done with java mail api? Here is what i use for sending the email:</p> <pre><code>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.port", "587"); props.put("mail.smtp.socketFactory.port", "465"); props.put("mail.smtp.socketFactory.port", "587"); 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 { 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); } 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"); } } </code></pre> <p>} Here what i get from logcat</p> <pre><code>12-07 09:58:50.781: E/Validate(595): println needs a message 12-07 09:58:50.781: E/Validate(595): java.lang.NullPointerException: println needs a message 12-07 09:58:50.781: E/Validate(595): at android.util.Log.println_native(Native Method) 12-07 09:58:50.781: E/Validate(595): at android.util.Log.i(Log.java:143) 12-07 09:58:50.781: E/Validate(595): at stathis.example.teliko.Data.onClick(Data.java:107) 12-07 09:58:50.781: E/Validate(595): at android.view.View.performClick(View.java:2408) 12-07 09:58:50.781: E/Validate(595): at android.view.View$PerformClick.run(View.java:8816) 12-07 09:58:50.781: E/Validate(595): at android.os.Handler.handleCallback(Handler.java:587) 12-07 09:58:50.781: E/Validate(595): at android.os.Handler.dispatchMessage(Handler.java:92) 12-07 09:58:50.781: E/Validate(595): at android.os.Looper.loop(Looper.java:123) 12-07 09:58:50.781: E/Validate(595): at android.app.ActivityThread.main(ActivityThread.java:4627) 12-07 09:58:50.781: E/Validate(595): at java.lang.reflect.Method.invokeNative(Native Method) 12-07 09:58:50.781: E/Validate(595): at java.lang.reflect.Method.invoke(Method.java:521) 12-07 09:58:50.781: E/Validate(595): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 12-07 09:58:50.781: E/Validate(595): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 12-07 09:58:50.781: E/Validate(595): at dalvik.system.NativeStart.main(Native Method) </code></pre>

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