​
Before you begin

  1. Register a QuickBlox account. This is a matter of a few minutes and you will be able to use this account to build your apps.
  2. Configure QuickBlox SDK for your app. Check out Setup page for more details.
  3. Create a user session to be able to use QuickBlox functionality. See Authentication page to learn how to do it.
  4. Connect to the Chat server. See Connection page to learn how to do it.
Visit Key Concepts page to learn the most important QuickBlox concepts.

​
Dialog types

All chats between users are organized in dialogs. There are 3 types of dialogs:
  • private dialog - a dialog between 2 users.
  • group dialog - a dialog between the specified list of users.
  • public dialog - an open dialog. Any user from your app can be joined to it.
You need to create a new dialog and then use it to chat with other users. You also can obtain a list of your existing dialogs.

​
Create dialog

To create a private dialog, you need to set the dialog type to QBDialogType.PRIVATE and ID of an opponent you want to create a chat with. 
ArrayList<Integer> occupantIdsList = new ArrayList<Integer>();
occupantIdsList.add(123);

QBChatDialog dialog = new QBChatDialog();
dialog.setType(QBDialogType.PRIVATE);
dialog.setOccupantsIds(occupantIdsList);

// or just use DialogUtils
//QBChatDialog dialog = DialogUtils.buildPrivateDialog(recipientId);

QBRestChatService.createChatDialog(dialog).performAsync(new QBEntityCallback<QBChatDialog>() {
    @Override
    public void onSuccess(QBChatDialog result, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
To create a group dialog for a predefined number of occupants, you need to set the dialog type to QBDialogType.GROUP and IDs of opponents you want to create a chat with using the QBChatDialog value. 
ArrayList<Integer> occupantIdsList = new ArrayList<Integer>();
occupantIdsList.add(123);
occupantIdsList.add(234);
occupantIdsList.add(345);
occupantIdsList.add(456);

QBChatDialog dialog = new QBChatDialog();
dialog.setName("Group chat");
dialog.setType(QBDialogType.GROUP);
dialog.setOccupantsIds(occupantIdsList);
// Photo can be a link to a file in Content module, Custom Objects module or just a web link.
// dialog.setPhoto("");

// or just use DialogUtils
// QBChatDialog dialog = DialogUtils.buildDialog("Chat with Friends", QBDialogType.GROUP, occupantIdsList);

QBRestChatService.createChatDialog(dialog).performAsync(new QBEntityCallback<QBChatDialog>() {
    @Override
    public void onSuccess(QBChatDialog result, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
It’s possible to create a public dialog, so any user from your application can be joined to it. There is no list of occupants. This dialog is open for everybody. You just need to set QBDialogType.PUBLIC_GROUP as a dialog type. 
QBChatDialog dialog = new QBChatDialog();
dialog.setName("Public group chat");
dialog.setType(QBDialogType.PUBLIC_GROUP);
// Photo can be a link to a file in Content module, Custom Objects module or just a web link.
// dialog.setPhoto("");

QBRestChatService.createChatDialog(dialog).performAsync(new QBEntityCallback<QBChatDialog>() {
    @Override
    public void onSuccess(QBChatDialog result, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});

​
Create dialog with custom parameters

Any dialog can be extended with additional parameters whether it is a private, group, or public. These parameters can be used to store additional data. Also, these parameters can be used in dialogs retrieval requests. To start using additional parameters, create an additional schema of your parameters. This is a Custom Objects class. Just create an empty class with all fields that you need. These fields will be additional parameters in your dialog. See this section to learn how to create a schema using Custom Objects. Then, specify the parameters defined in the schema in a new dialog. 
private void createDialogWithCurtomParameters() {
    QBDialogCustomData customData = new QBDialogCustomData();
    customData.putBoolean("customBoolean", true);
    customData.putInteger("customInteger", 327);
    customData.putString("customString", "Value");
    customData.putDate("customDate", new Date());
    customData.putFloat("customFloat", 327.2f);
    List<String> paramsList = new ArrayList<>();
    paramsList.add("param1");
    customData.putArray("nameOfCustomArray", paramsList);

    QBChatDialog chatDialog = new QBChatDialog();
    chatDialog.setCustomData(customData);

    QBRestChatService.createChatDialog(chatDialog).performAsync(new QBEntityCallback<QBChatDialog>() {
        @Override
        public void onSuccess(QBChatDialog chatDialog, Bundle bundle) {

        }

        @Override
        public void onError(QBResponseException exception) {

        }
    });
}

// now we can get the same parameters from any dialog we load
private void getDataFromDialog(QBChatDialog chatDialog) {
    Integer customInteger = chatDialog.getCustomData().getInteger("customInteger");
    String customString = chatDialog.getCustomData().getString("customString");
    }

​
Join dialog

Before you start chatting in a group or public dialog, you need to join it by calling the join() method. If you’ve successfully joined the dialog, you can send/receive messages in real-time. See this section to learn how to send/receive messages. 
for (QBChatDialog dialog : chatDialogs) {
    if (dialog.getType() != QBDialogType.PRIVATE) {
        try {
            dialog.join(new DiscussionHistory());
        } catch (XMPPException exception) {

        } catch (SmackException exception) {

        }
    }
}
This is a synchronous way to join dialogs, so you need to handle XMPPException and SmackException. But in case of using .performAsync(), you will receive onSuccess() or onError() callbacks. To define if you have already joined the dialog, you should call the appropriate method from the dialog model. 
anyDialog.isJoined();
Let’s see, how the join() method is used with regard to the dialog type.
CapabilitiesPublicGroupPrivate
Join✓✓✗
You can join a group dialog only if your user ID is present in the occupantIDs array, in the dialog model.Your user ID is added to the occupantIDs array if you create a dialog or you are added to the dialog by the other user. See this section to learn how to add occupants to the group dialog.

​
Leave dialog

You can leave the group and public dialog by calling the leave() method. If the dialog is left, you can’t send/receive messages. To be able to receive/send messages, you need to join it. 
try {
    groupDialog.leave();
} catch (XMPPException | SmackException.NotConnectedException exception) {

}
Let’s see, how the leave() method is used with regard to the dialog type.
CapabilitiesPublicGroupPrivate
Leave✓✓✗
When you leave a group dialog, your user ID is still present in the occupantIDs array, in the dialog model. As a result, the dialog will still be present in the list of dialogs and you will still have access to the chat history.To remove yourself from the group dialog, use the updateChatDialog() method. See this section to learn how to remove occupants from the group dialog.

​
Retrieve online users

You can get a list of dialog occupants who are currently online. Call the requestOnlineUsers() method to get the list of online users who are joined to the dialog. As a result, a list of user IDs is returned. 
try {
    Collection<Integer> onlineUsersIds = chatDialog.requestOnlineUsers();
} catch (XMPPException.XMPPErrorException exception) {

} catch (SmackException.NotConnectedException exception) {

} catch (SmackException.NoResponseException exception) {

}
Let’s see, how the requestOnlineUsers() method is used with regard to the dialog type
CapabilitiesPublicGroupPrivate
Retrieve online users✗✓✗
You can retrieve online users from the group dialog only if you are joined to it.

​
Retrieve list of dialogs

It’s common to request all your dialogs on every app login. The request below will return group dialogs containing the test in the names, sorted in descending order, and limited to 50 dialogs on the page. 
String field = "name";
String searchValue = "test";
QBDialogType type = QBDialogType.GROUP;

QBRequestGetBuilder requestBuilder = new QBRequestGetBuilder();
requestBuilder.setLimit(50);
requestBuilder.setSkip(0);
requestBuilder.sortDesc(field);
requestBuilder.in(field, searchValue);

QBRestChatService.getChatDialogs(type, requestBuilder).performAsync(new QBEntityCallback<ArrayList<QBChatDialog>>() {
    @Override
    public void onSuccess(ArrayList<QBChatDialog> result, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
ArgumentRequiredDescription
typeyesDialog type. Pass null to retrieve all dialogs.
requestBuilderyesAllows to set parameters for the request.
If you want to retrieve only dialogs updated after some specific date time and order the search results, you can apply operators. This is useful if you cache dialogs somehow and do not want to obtain the whole list of your dialogs on every app start. Thus, you can apply search and sort operators to list dialogs on the page so that it is easier to view specific dialogs. The operators are set in the QBRequestGetBuilder class. If you want to get a paginated list of users from the server, you can set the following pagination parameters in the QBRequestGetBuilder class.
Pagination parameterDescription
skipSkip N records in search results. Useful for pagination. Default (if not specified): 0.
limitLimit search results to N records. Useful for pagination. Default value: 100.

​
Search operators

You can use search operators to get more specific search results. The request below will return group dialogs in the array containing test in their names. 
String field = "name";
String searchValue = "test";
QBDialogType type = QBDialogType.GROUP;

QBRequestGetBuilder requestBuilder = new QBRequestGetBuilder();
requestBuilder.in(field, searchValue);

QBRestChatService.getChatDialogs(type, requestBuilder).performAsync(new QBEntityCallback<ArrayList<QBChatDialog>>() {
    @Override
    public void onSuccess(ArrayList<QBChatDialog> result, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
Here are the methods that you can use to search for the exact data that you need.
MethodsApplicable to typesApplicable to fieldsDescription
lt(field, searchValue)number, string, datelast_message_date_sent, created_at, updated_atLess Than operator.
lte(field, searchValue)number, string, datelast_message_date_sent, created_at, updated_atLess Than or Equal to operator.
gt(field, searchValue)number, string, datelast_message_date_sent, created_at, updated_atGreater Than operator.
gte(field, searchValue)number, string, datelast_message_date_sent, created_at, updated_atGreater Than or Equal to operator.
ne(field, searchValue)number, string, date_id, name, last_message_date_sentNot Equal to operator.
in(field, searchValue)number, string, datetype, last_message_date_sent, nameIN array operator.
nin(field, searchValue)number, string, datelast_message_date_sentNot IN array operator.
all(field, searchValue)numberoccupants_idsALL are contained in array.
ctn(field, searchValue)stringnameAll records that contain a particular substring.

​
Sort operators

You can use sort operators to order the search results. The request below will return group dialogs by the field sorted in descending order. 
String field = "name";
QBDialogType type = QBDialogType.GROUP;

QBRequestGetBuilder requestBuilder = new QBRequestGetBuilder();
requestBuilder.sortDesc(field);

QBRestChatService.getChatDialogs(type, requestBuilder).performAsync(new QBEntityCallback<ArrayList<QBChatDialog>>() {
    @Override
    public void onSuccess(ArrayList<QBChatDialog> result, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
Here are the methods that you can use to order the search results.
MethodsApplicable to typesApplicable to fieldsDescription
sortAsc(field)All typesid, created_at, name, last_message_date_sentSearch results will be sorted in ascending order by the specified field.
sortDesc(field)All typesid, created_at, name, last_message_date_sentSearch results will be sorted in descending order by the specified field.

​
Update dialog

You can update the information for a private, group, and public dialog. 
QBChatDialog dialog = new QBChatDialog();
dialog.setDialogId("dsfsd934329hjhkda98793j2");  // to make updates - the dialog must contain dialogId
dialog.setName("Team room");
dialog.setPhoto("https://new_photo_url"); // or it can be ID of uploaded File with QBContent

QBRequestUpdateBuilder requestBuilder = new QBRequestUpdateBuilder();

QBRestChatService.updateChatDialog(dialog, requestBuilder).performAsync(new QBEntityCallback<QBChatDialog>() {
    @Override
    public void onSuccess(QBChatDialog updatedDialog, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
Let’s see what capabilities a particular user role has with regard to the dialog type.
CapabilitiesPublic dialogGroup dialogPrivate dialog
Update a dialog nameOwnerOwner✗
Update a photoOwnerOwner✗
Update custom parametersOwner,OccupantOwner,OccupantOwner,Occupant

​
Add occupants

You can add occupants in a group dialog by using the addUsers() method. As a result, your ID will be added to the occupantIDs array. 
// to add users you should pass whole QBUser model or it's ID (user.getId)t
QBDialogRequestBuilder requestBuilder = new QBDialogRequestBuilder();

QBChatDialog dialog = new QBChatDialog();

ArrayList<QBUser> usersToAdd = new ArrayList<QBUser>();
usersToAdd.add(QBUser());
usersToAdd.add(QBUser());

QBUser[] usersArray = new QBUser[usersToAdd.size()];
requestBuilder.addUsers(usersToAdd.toArray(usersArray));

QBRestChatService.updateChatDialog(dialog, requestBuilder).performAsync(new QBEntityCallback<QBChatDialog>() {
    @Override
    public void onSuccess(QBChatDialog chatDialog, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
ArgumentRequiredDescription
dialogyesA dialog to add users to.
requestBuilderyesSpecifies requestBuilder fields that should be set.
Let’s see what capabilities a particular user role has with regard to the dialog type.
CapabilitiesPublic dialogGroup dialogPrivate dialog
Add other users✗Owner,Occupant✗

​
Remove occupants

You can remove occupants from a group dialog by using the removeUsers() method. As a result, the IDs will be removed the occupantIDs array. 
// to remove users you should pass whole QBUser model or it's ID (user.getId)
QBDialogRequestBuilder requestBuilder = new QBDialogRequestBuilder();

QBChatDialog dialog = new QBChatDialog();

ArrayList<QBUser> usersToRemove = new ArrayList<QBUser>();
usersToRemove.add(QBUser());
usersToRemove.add(QBUser());

QBUser[] usersArray = new QBUser[usersToRemove.size()];
requestBuilder.removeUsers(usersToRemove.toArray(usersArray));

QBRestChatService.updateChatDialog(dialog, requestBuilder).performAsync(new QBEntityCallback<QBChatDialog>() {
    @Override
    public void onSuccess(QBChatDialog chatDialog, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
ArgumentRequiredDescription
dialogyesA dialog to remove users from.
requestBuilderyesSpecifies requestBuilder fields that should be set.
Let’s see what capabilities a particular user role has with regard to the dialog type.
CapabilitiesPublic dialogGroup dialogPrivate dialog
Remove other users✗Owner✗
Remove yourself✗Owner,Occupant✗

​
Delete dialog

A request below will remove a dialog for a current user, but other users will be still able to chat there. 
String dialogId = qbChatDialog.getDialogId();
boolean forceDelete = false;

QBRestChatService.deleteDialog(dialogId, forceDelete).performAsync(new QBEntityCallback<Void>() {
    @Override
    public void onSuccess(Void aVoid, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
Set the forceDelete parameter as true to completely remove the dialog for all users. You can also delete multiple dialogs in a single request. You can also use multiple dialogs deleting using the snippet below. 
StringifyArrayList<String> dialogsIds = new StringifyArrayList<>();
for (QBChatDialog dialog : dialogsIds) {
    dialogsIds.add(dialog.getDialogId());
}
Bundle bundle = new Bundle();
boolean forceDelete = false;

QBRestChatService.deleteDialogs(dialogsIds, forceDelete, bundle).performAsync(new QBEntityCallback<ArrayList<String>>() {
    @Override
    public void onSuccess(ArrayList<String> strings, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
Let’s see what capabilities a particular user role has with regard to the dialog type.
CapabilitiesPublicGroupPrivate
Delete a dialog for all usersusing the forceDeleteparameter.OwnerOwnerOwner
Delete a dialog for a current userOwnerOwner,OccupantOwner,Occupant

​
Get number of dialogs

You can get a number of dialogs using the getChatDialogsCount() method. The request below will return a count of all group dialogs. 
QBRequestGetBuilder requestBuilder = new QBRequestGetBuilder();
String field = "type";
Bundle bundle = new Bundle();

requestBuilder.addRule(field, QueryRule.IN, QBDialogType.GROUP.getCode());

QBRestChatService.getChatDialogsCount(requestBuilder, bundle).performAsync(new QBEntityCallback<Integer>() {
    @Override
    public void onSuccess(Integer count, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
ArgumentRequiredDescription
requestBuilderyesAllows to set parameters for the request.
bundlenoThe bundle with response additional information.

​
Get number of unread messages

To get a number of unread messages from a particular dialog, use the code snippet below. 
QBRestChatService.getChatDialogById(dialog.getDialogId()).performAsync(new QBEntityCallback<QBChatDialog>() {
    @Override
    public void onSuccess(QBChatDialog chatDialog, Bundle bundle) {
        // get unread messages count
        int unreadMessageCount = chatDialog.getUnreadMessageCount();
    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
You can also retrieve total unread messages count by using the getTotalUnreadMessagesCount() method. 
Set<String> dialogsIds = new HashSet<String>();
dialogsIds.add("44g9867978v894365tf7g3y4");
dialogsIds.add("47r8738478394ffdi39id493");
Bundle bundle = new Bundle();

QBRestChatService.getTotalUnreadMessagesCount(dialogsIds, bundle).performAsync(new QBEntityCallback<Integer>() {
    @Override
    public void onSuccess(Integer totalCount, Bundle bundle) {

    }

    @Override
    public void onError(QBResponseException exception) {

    }
});
ArgumentRequiredDescription
dialogsIdsyesIDs of dialogs.- If dialogsIds are not specified, the total number of unread messages for all dialogs of the user will be returned.- If dialogsIds are specified, the number of unread messages for each specified dialog will be returned. Also, the total number of unread messages for all dialogs of the user will be returned.

​
Resources

A sequence of steps a user takes to start a dialog by moving through the application lifecycle.