如何在smack 4.1 beta2中创建持久的muc空间

Question

从asmack迁移到smack 4.1 beta2.创建的muc房间不再持久.

MultiUserChatManager mucm=MultiUserChatManager.getInstanceFor(connection);
muc=mucm.getMultiUserChat(groupid+"@conference.localhost");
DiscussionHistory histroy=new DiscussionHistory();
histroy.setMaxStanzas(10);
muc.createOrJoin(username,null,histroy,SmackConfiguration.getDefaultPacketReplyTimeout());
muc.nextMessage();

当用gajim创建时,房间是持久的.

编辑:这是我们之前使用的代码.默认情况下聊天室是持久的,

muc = new MultiUserChat(connection, groupid+"@conference.localhost");

if(!muc.isJoined())
{
DiscussionHistory histroy=new DiscussionHistory();
histroy.setMaxStanzas(10);
muc.join(username,null,histroy,SmackConfiguration.getDefaultPacketReplyTimeout());
muc.nextMessage(0);
}

Answer 1

创建会议室时，您需要在MUC配置中设置muc#roomconfig_persistentroom为。true

MultiuserChat muc = manager.getMultiUserChat("myroom@muc.example.org");
muc.create("myNick");
// room is now created by locked
Form form = muc.getConfigurationForm();
Form answerForm = form.createAnswerForm();
answerForm.setAnswer("muc#roomconfig_persistentroom", true);
muc.sendConfigurationForm(answerForm);
// sending the configuration form unlocks the room

请注意，并非所有XMPP MUC服务都支持持久空间。有关更多信息，请参见：

• https://www.igniterealtime.org/builds/smack/dailybuilds/javadoc/org/jivesoftware/smackx/muc/MultiUserChat.html#create(java.lang.String）
• https://www.igniterealtime.org/builds/smack/dailybuilds/documentation/extensions/muc.html
• http://xmpp.org/extensions/xep-0045.html#createroom

Answer 2

您需要提交这样的表单来制作持久性组:

private void setConfig(MultiUserChat multiUserChat) {
    try {
        Form form = multiUserChat.getConfigurationForm();
        Form submitForm = form.createAnswerForm();
        for (Iterator<FormField> fields = submitForm.getFields(); fields.hasNext();) {
            FormField field = (FormField) fields.next();
            if (!FormField.TYPE_HIDDEN.equals(field.getType()) && field.getVariable() != null) {
                submitForm.setDefaultAnswer(field.getVariable());
            }
        }
        submitForm.setAnswer("muc#roomconfig_publicroom", true);
        submitForm.setAnswer("muc#roomconfig_persistentroom", true);
        multiUserChat.sendConfigurationForm(submitForm);
    } catch (Exception e) {
        e.printStackTrace();
    }
}