android - 尽管没有连接，但GMailSender不会缓存任何异常

我正在尝试使用GMailSender直接从我的应用发送电子邮件

我的片段：

公共类updateFragment扩展了SherlockFragment {

public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle saved)
{
    View v = inflater.inflate(R.layout.update_layout, group, false);





    Button buttonsubmit = (Button) v.findViewById(R.id.buttonsubmit);
    buttonsubmit.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            try {
                GMailSender sender = new GMailSender("[email protected]", "test");
                sender.sendMail("Update info",
                        "",
                        "[email protected]", "[email protected]");
                Toast.makeText(updateFragment.this.getActivity().getBaseContext(), "Info Submitted Successfully", Toast.LENGTH_SHORT).show();

            } catch (Exception e) {
                Log.e("SendMail", e.getMessage(), e);
                Toast.makeText(updateFragment.this.getActivity().getBaseContext(), "Please make sure that you have an internet connection", Toast.LENGTH_SHORT).show();
            }




        }

    });

    return v;

}
}

GMailSender：

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");
    }
}
}

它可以正常工作，但是如果没有连接，则好像工作正常，我的意思是吐司会说“信息已成功提交”，为什么不引起或捕获异常？

提前致谢

最佳答案

这是因为
GMailSender.sendMail已经在捕获异常。删除GMailSender.sendMail中的try catch块，您将获得异常。

关于android - 尽管没有连接，但GMailSender不会缓存任何异常，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/12230935/