请问可以在我的 gmail 状态中发布倒计时吗？ 像“01:44:15:23”和它不断递减。
【问题讨论】：
找到一个好article to share：
Google Talk 使用 XMPP，如果您可以使用 XMPP client 连接到您的 Google account，您可以使用客户端而不是 Google Talk。
整个机制太简单了（使用了 Smack XMPP Library，因为它很简单，对我很有帮助）：
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import org.jivesoftware.smack.XMPPConnection;
public void connect() {
XMPPConnection connection = new XMPPConnection(server); //Server is gmail.com for Google Talk.
connection.connect();
connection.login(username, password); //Username and password.
}
计算现在与目标日期之间的差异
这个过程是使用 Java Calendar 和 Date 对象完成的：
import java.util.Calendar;
import java.util.Date;
{
Calendar calendar1 = Calendar.getInstance();
Date d = new Date();
calendar1.setTime(d);
Calendar calendar2 = Calendar.getInstance();
calendar2.setTime(endLine); //End line is the date we're counting to.
long milliseconds1 = calendar1.getTimeInMillis();
long milliseconds2 = calendar2.getTimeInMillis();
long diff = milliseconds2 - milliseconds1;
long diffDays = diff / (24 * 60 * 60 * 1000);
diff = diff % (24 * 60 * 60 * 1000);
long diffHours = diff / (60 * 60 * 1000);
diff = diff % (60 * 60 * 1000);
long diffMinutes = diff / (60 * 1000);
diff = diff % (60 * 1000);
}
此代码以天、小时和分钟计算两个日期之间的差异。
发送状态
计算完差值后，我们要做的就是发送出席信息：
import org.jivesoftware.smack.packet.Presence;
{
String remaining = Long.toString(diffDays) + " day(s), " + Long.toString(diffHours) + " hour(s), " + Long.toString(diffMinutes) + " minute(s) " + message; //Message is usually: Until "something".
Presence presence = new Presence(Presence.Type.available);
presence.setStatus(remaining);
presence.setPriority(24); //Highest priority in Google Talk
presence.setMode(presenceMode); //This is one of XMPP modes (Available, Chat, DND, Away, XA).
connection.sendPacket(presence);
}
在此之后，人们将看到您的新状态，而不是 Google Talk 中的状态。 （请注意，您无法在 Google Talk 中看到更改，但请放心，它已更改。如果您想确保更改，请让您的一位朋友告诉您您的状态）。