我正在构建一个使用 Gmail 来备份一些数据的应用程序。我使用 XOAUTH 连接到 Gmail 并获取令牌和秘密。但我无法连接到 Gmail 的 IMAP 服务。我按照以下示例进行操作http://code.google.com/p/google-mail-xoauth-tools/wiki/JavaSampleCode http://code.google.com/p/google-mail-xoauth-tools/wiki/JavaSampleCode:
Properties props = new Properties();
props.put("mail.imaps.sasl.enable", "true");
props.put("mail.imaps.sasl.mechanisms", "XOAUTH");
props.put(OAUTH_TOKEN_PROP, oauthToken);
props.put(OAUTH_TOKEN_SECRET_PROP, oauthTokenSecret);
props.put(CONSUMER_KEY_PROP, Const.CONSUMER_KEY);
props.put(CONSUMER_SECRET_PROP, Const.CONSUMER_SECRET);
Session session = Session.getInstance(props);
session.setDebug(debug);
final URLName unusedUrlName = null;
IMAPSSLStore store = new IMAPSSLStore(session, unusedUrlName);
final String emptyPassword = "";
store.connect(host, port, userEmail, emptyPassword);
return store;
运行时，报告以下异常。
javax.mail.MessagingException: * BYE [UNAVAILABLE] Temporary System Error;
nested exception is:
com.sun.mail.iap.ConnectionException: * BYE [UNAVAILABLE] Temporary System Error
at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:569)
at javax.mail.Service.connect(Service.java:288)
at com.doodlemobile.zy.finenote.OAuthHelperActivity$XoauthAuthenticator.connectToImap(OAuthHelperActivity.java:565)
at com.doodlemobile.zy.finenote.OAuthHelperActivity$ConnectGmailTask.doInBackground(OAuthHelperActivity.java:484)
at com.doodlemobile.zy.finenote.OAuthHelperActivity$ConnectGmailTask.doInBackground(OAuthHelperActivity.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
Caused by: com.sun.mail.iap.ConnectionException: * BYE [UNAVAILABLE] Temporary System Error
at com.sun.mail.iap.Protocol.handleResult(Protocol.java:346)
at com.sun.mail.imap.protocol.IMAPProtocol.login(IMAPProtocol.java:336)
at com.sun.mail.imap.IMAPStore.login(IMAPStore.java:615)
at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:549)
... 11 more
我用的是SUN的javamail。有人愿意帮助我吗？
我面临着同样的问题。
启用调试后（session.setDebug(true)）我注意到我收到了ClassNotFoundException http://docs.oracle.com/javase/1.4.2/docs/api/java/lang/ClassNotFoundException.html在显示临时系统错误之前。
08-06 14:38:59.148: I/System.out(3139): DEBUG IMAP: Can't load SASL authenticator: java.lang.ClassNotFoundException: com.sun.mail.imap.protocol.IMAPSaslAuthenticator
08-06 14:38:59.148: I/System.out(3139): DEBUG IMAP: LOGIN command trace suppressed
08-06 14:39:00.265: I/System.out(3139): DEBUG IMAP: LOGIN command result: * BYE [UNAVAILABLE] Temporary System Error
08-06 14:39:00.289: E/com.example.gmailandroid.MainActivity(3139): * BYE [UNAVAILABLE] Temporary System Error
08-06 14:39:00.289: E/com.example.gmailandroid.MainActivity(3139): javax.mail.MessagingException: * BYE [UNAVAILABLE] Temporary System Error;
08-06 14:39:00.289: E/com.example.gmailandroid.MainActivity(3139): nested exception is:
08-06 14:39:00.289: E/com.example.gmailandroid.MainActivity(3139): com.sun.mail.iap.ConnectionException: * BYE [UNAVAILABLE] Temporary System Error
08-06 14:39:00.289: E/com.example.gmailandroid.MainActivity(3139): at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:668)
查看JavaMail源代码，似乎这是因为它试图加载依赖于非android java资源的com.sun.mail.imap.protocol.IMAPSaslAuthenticator。
javax.security.sasl.*
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