环信聊天室模型支持最大成员数为5000，和群组不同，聊天室内成员离线后，服务器当监听到此成员不在线后不在会给此成员再发推送。
curl -X POST “http://a1.easemob.com/easemob-demo/chatdemoui/chatrooms” -H “Authorization: Bearer ${token}” -d ‘{“owner”:”u1”,”members”:[“u1”,”u2”],”maxusers”:5000,”groupname”:”chatroom title”,”desc”:”chatroom description”}”curl -X GET “http://a1.easemob.com/easemob-demo/chatdemoui/chatrooms” -H “Authorization: Bearer ${token}”curl -X GET “http://a1.easemob.com/easemob-demo/chatdemoui/chatrooms/1430798028680235” -H “Authorization: Bearer ${token}”curl -X DELETE ‘https://a1.easemob.com/easemob-demo/chatdemoui/chatrooms/1430798028680235/users/u2’ -H “Authorization: Bearer ${token}”curl -X DELETE ‘https://a1.easemob.com/easemob-demo/chatdemoui/chatrooms/143228117786605’ -H “Authorization: Bearer ${token}”更多REST操作请参考 聊天室管理。
public void joinChatRoom(final String roomId, final EMValueCallBack<EMChatRoom> callback)参数：
示例：
public void onChatroomViewCreation{
findViewById(R.id.container_to_group).setVisibility(View.GONE);
final ProgressDialog pd = ProgressDialog.show(this, "", "Joining......");
EMChatManager.getInstance().joinChatRoom(toChatUsername, new EMValueCallBack<EMChatRoom>() {
@Override
public void onSuccess(EMChatRoom value) {
runOnUiThread(new Runnable(){
@Override
public void run(){
pd.dismiss();
room = EMChatManager.getInstance().getChatRoom(toChatUsername);
if(room !=null){
((TextView) findViewById(R.id.name)).setText(room.getName());
}else{
((TextView) findViewById(R.id.name)).setText(toChatUsername);
}
EMLog.d(TAG, "join room success : " + room.getName());
onConversationInit();
onListViewCreation();
}
});
}
@Override
public void onError(final int error, String errorMsg) {
EMLog.d(TAG, "join room failure : " + error);
runOnUiThread(new Runnable(){
@Override
public void run(){
pd.dismiss();
}
});
finish();
}
});
}
protected void onConversationInit(){
if(chatType == CHATTYPE_SINGLE){
conversation = EMChatManager.getInstance().getConversationByType(toChatUsername,EMConversationType.Chat);
}else if(chatType == CHATTYPE_GROUP){
conversation = EMChatManager.getInstance().getConversationByType(toChatUsername,EMConversationType.GroupChat);
}else if(chatType == CHATTYPE_CHATROOM){
conversation = EMChatManager.getInstance().getConversationByType(toChatUsername,EMConversationType.ChatRoom);
}
// 把此会话的未读数置为0
conversation.markAllMessagesAsRead();
// 初始化db时，每个conversation加载数目是getChatOptions().getNumberOfMessagesLoaded
// 这个数目如果比用户期望进入会话界面时显示的个数不一样，就多加载一些
final List<EMMessage> msgs = conversation.getAllMessages();
int msgCount = msgs != null ? msgs.size() : 0;
if (msgCount < conversation.getAllMsgCount() && msgCount < pagesize) {
String msgId = null;
if (msgs != null && msgs.size() > 0) {
msgId = msgs.get(0).getMsgId();
}
if (chatType == CHATTYPE_SINGLE) {
conversation.loadMoreMsgFromDB(msgId, pagesize);
} else {
conversation.loadMoreGroupMsgFromDB(msgId, pagesize);
}
}
// 监听聊天室变化回调
EMChatManager.getInstance().addChatRoomChangeListener(new EMChatRoomChangeListener(){
@Override
public void onInvitationReceived(String roomId, String roomName,
String inviter, String reason) {
}
@Override
public void onChatRoomDestroyed(String roomId, String roomName) {
if(roomId.equals(toChatUsername)){
finish();
}
}
@Override
public void onMemberJoined(String roomId, String participant) {
}
@Override
public void onMemberExited(String roomId, String roomName,
String participant) {
}
@Override
public void onMemberKicked(String roomId, String roomName,
String participant) {
if(roomId.equals(toChatUsername)){
String curUser = EMChatManager.getInstance().getCurrentUser();
if(curUser.equals(participant)){
EMChatManager.getInstance().leaveChatRoom(toChatUsername);
finish();
}
}
}
});
}请注意对于聊天室模型，请一定要等到 Join 回调成功后再去初始化 conversation。
public void leaveChatRoom(String roomId)参数：
roomId: 要退出的聊天室的ID。
此方法是异步方法，不会阻塞当前线程。此方法没有回调，原因是在任何场景下退出聊天室，SDK 保证退出成功，无论有网出错，还是无网退出。对于聊天室模型，一般退出会话页面，就会调用此 leave 方法。
public EMCursorResult<EMChatRoom> fetchPublicChatRoomsFromServer(int pageSize, String cursor) throws EaseMobException参数：
返回值：
EMCursorResult<EMChatRoom> 内部包含返回的 cursor，和 List<EMChatRoom>。
获取所有环信的聊天室信息，包括聊天室 ID 和名称。
public EMChatRoom fetchChatRoomFromServer(String roomId) throws EaseMobExceptionpublic interface EMChatRoomChangeListener {
/**
* 聊天室被解散。
*
* @param roomId
* 聊天室id
* @param roomName
* 聊天室名称
*/
void onChatRoomDestroyed(String roomId, String roomName);
/**
* 聊天室加入新成员事件
*
* @param roomId
* 聊天室id
* @param participant
* 新成员username
*/
void onMemberJoined(String roomId, String participant);
/**
* 聊天室成员主动退出事件
*
* @param roomId
* 聊天室id
* @param roomName
* 聊天室名字
* @param participant
* 退出的成员的username
*/
void onMemberExited(String roomId, String roomName, String participant);
/**
* 聊天室人员被移除
*
* @param roomId
* 聊天室id
*@param roomName
* 聊天室名字
* @param participant
* 被移除人员的username
*/
void onMemberKicked(String roomId, String roomName, String participant);
}
应用可以通过注册聊天室监听，进行对UI的刷新。
public void addChatRoomChangeListener(EMChatRoomChangeListener listener)在会话页面注册监听，来监听成员被踢和聊天室被删除。
EMChatManager.getInstance().addChatRoomChangeListener(new EMChatRoomChangeListener(){
@Override
public void onChatRoomDestroyed(String roomId, String roomName) {
if(roomId.equals(toChatUsername)){
finish();
}
}
@Override
public void onMemberJoined(String roomId, String participant) {
}
@Override
public void onMemberExited(String roomId, String roomName,
String participant) {
}
@Override
public void onMemberKicked(String roomId, String roomName,
String participant) {
if(roomId.equals(toChatUsername)){
finish();
}
}
});