假设我有一个示例Firebase实时数据库，如下所示：
void insertEvent(String summary, String location, String des, DateTime startDate, DateTime endDate, EventAttendee[] eventAttendees) throws IOException {
Event event = new Event()
.setSummary(summary)
.setLocation(location)
.setDescription(des); EventDateTime start = new EventDateTime()
.setDateTime(startDate)
.setTimeZone(“America/Los_Angeles”);
event.setStart(start); EventDateTime end = new EventDateTime()
.setDateTime(endDate)
.setTimeZone(“America/Los_Angeles”);
event.setEnd(end); String[] recurrence = new String[] {“RRULE:FREQ=DAILY;COUNT=1”};
event.setRecurrence(Arrays.asList(recurrence)); event.setAttendees(Arrays.asList(eventAttendees)); EventReminder[] reminderOverrides = new EventReminder[] {
new EventReminder().setMethod(“email”).setMinutes(24 * 60),
new EventReminder().setMethod(“popup”).setMinutes(10),
};
Event.Reminders reminders = new Event.Reminders()
.setUseDefault(false)
.setOverrides(Arrays.asList(reminderOverrides));
event.setReminders(reminders); String calendarId = “primary”;
//event.send
if(mService!=null)
mService.events().insert(calendarId, event).setSendNotifications(true).execute();
}
节点用户所在的位置，跟踪已签名的用户及其名称。如果用户ABC发帖，帖子将插入到Feed节点中。
发布后，我需要使用uid知道名称。
我可以使用XYZDBName:
{
users:
{
uid1:
{
name: "ABC"
}
uid2:
{
name: "XYZ"
}
}
feeds:
{
postid:
{
content: "Hello"
madeby: "ABC"
}
}
}
获取uid，
但是如何遍历用户节点以匹配它呢？