是否有任何好的短代码示例只是阅读新的Gmail邮件?

时间:2010-07-21 20:58:16

标签: android gmail imap javamail

我一直在尝试编写一个定期解析gmail消息内容的应用。我已经阅读了JavaMail常见问题解答,我已经查看了JavaMail下载包中的一些示例,但是无法使其工作。下面的代码当前导致以下gmail错误:

  

主机未解析:imaps.gmail.com:993

我也试过imap.gmail.com:143但得到:

  

主机未解析:imap.gmail.com:143

非常感谢任何帮助或建议。 GMailReader是我用来尝试返回gmail imap消息的类:

public class GMailReader extends javax.mail.Authenticator { 
    private String mailhost = "imaps.gmail.com"; 
    private String user; 
    private String password; 
    private Session session; 
    public GMailReader(String user, String password) { 
        this.user = user; 
        this.password = password; 
        Properties props = new Properties(); 
        props.setProperty("mail.transport.protocol", "imaps"); 
        props.setProperty("mail.imaps.host", mailhost); 
        props.put("mail.imaps.auth", "true"); 
        props.put("mail.imaps.port", "993"); 
        props.put("mail.imaps.socketFactory.port", "993"); 
        props.put("mail.imaps.socketFactory.class", 
                  "javax.net.ssl.SSLSocketFactory"); 
        props.put("mail.imaps.socketFactory.fallback", "false"); 
        props.setProperty("mail.imaps.quitwait", "false"); 
        session = Session.getDefaultInstance(props, this); 
    } 
    public synchronized Message[] readMail() throws Exception { 
        try { 
            Store store = session.getStore("imaps"); 
            store.connect("imaps.gmail.com", user, password); 
            Folder folder = store.getFolder("INBOX"); 
            folder.open(Folder.READ_ONLY); 
            Message[] msgs = folder.getMessages(1, 10); 
            FetchProfile fp = new FetchProfile(); 
            fp.add(FetchProfile.Item.ENVELOPE); 
            folder.fetch(msgs, fp); 
            return msgs; 
        } catch (Exception e) { 
            Log.e("readMail", e.getMessage(), e); 
            return null; 
        } 
    } 
}

4 个答案:

答案 0 :(得分:5)

我找到了一个有用的示例here。我的错误是使用“mail.transport.protocol”而不是“mail.store.protocol。”

答案 1 :(得分:4)

此后是

的更正版本
public class GMailReader extends javax.mail.Authenticator { 
    private static final String TAG = "GMailReader";

    private String mailhost = "imap.gmail.com";  
    private Session session;
    private Store store;

    public GMailReader(String user, String password) {

        Properties props = System.getProperties();
        if (props == null){
         Log.e(TAG, "Properties are null !!");
        }else{
        props.setProperty("mail.store.protocol", "imaps");            

        Log.d(TAG, "Transport: "+props.getProperty("mail.transport.protocol"));
        Log.d(TAG, "Store: "+props.getProperty("mail.store.protocol"));
        Log.d(TAG, "Host: "+props.getProperty("mail.imap.host"));
        Log.d(TAG, "Authentication: "+props.getProperty("mail.imap.auth"));
        Log.d(TAG, "Port: "+props.getProperty("mail.imap.port"));
        }
    try {
        session = Session.getDefaultInstance(props, null);
        store = session.getStore("imaps");
        store.connect(mailhost, user, password);
        Log.i(TAG, "Store: "+store.toString());
    } catch (NoSuchProviderException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (MessagingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

public synchronized Message[] readMail() throws Exception { 
    try { 
        Folder folder = store.getFolder("Inbox"); 
        folder.open(Folder.READ_ONLY);

        /* TODO to rework
        Message[] msgs = folder.getMessages(1, 10);
        FetchProfile fp = new FetchProfile(); 
        fp.add(FetchProfile.Item.ENVELOPE); 
        folder.fetch(msgs, fp);
        */
        Message[] msgs = folder.getMessages();
        return msgs; 
    } catch (Exception e) { 
        Log.e("readMail", e.getMessage(), e); 
        return null; 
    } 
} 
}

再见

答案 2 :(得分:2)

我发现GmailReader概念非常实用且设计精良,符合GmailSender示例所示: Sending Email in Android using JavaMail API without using the default/built-in app

但有任何消息,关于下面提到的错误?并实现了JackN的命题?

最诚挚的问候 SKN

答案 3 :(得分:2)

经过大量的试验,错误和谷歌搜索,这个答案的蛇人版为我提供了gmail阅读器所需的可行示例;

然而,其他人应该知道(如果使用更高版本的Android SDK)Manifest权限要求以及需要使用asyncTask将潜在的长时间运行任务移出主UI线程),这两者都在{ {3}}

我还应该提一下,如果像我一样,你打算也实现一个smtp发送类,我已经在某处讨论过建议应该使用session.getInstance来代替session.getDefaultInstance。