android - GMailSender 不缓存任何异常，尽管没有连接

Question

我正在尝试使用 GMailSender 直接从我的应用程序发送电子邮件

我的 fragment :

公共(public)类 updateFragment 扩展 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("<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="423627313602252f232b2e6c212d2f" rel="noreferrer noopener nofollow">[email protected]</a>", "test");
                sender.sendMail("Update info",   
                        "",   
                        "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="0b7f6e787f4b6c666a626725686466" rel="noreferrer noopener nofollow">[email protected]</a>", "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="f88c9d8b8cb89f95999194d69b9795" rel="noreferrer noopener nofollow">[email protected]</a>");
                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;

}
}

GMail发送器:

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");   
    }   
}   
}  

它工作正常，但如果没有连接，它看起来工作正常，我的意思是 toast 会说“信息提交成功”，为什么它没有导致或捕获异常？？

提前致谢

Answer 1

发生这种情况是因为 GMailSender.sendMail 已捕获异常。删除 GMailSender.sendMail 内的 try catch block ，您将得到异常。