> ## Documentation Index
> Fetch the complete documentation index at: https://cometchat-22654f5b-docs-rn-guide-message-privately.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Create Group

> Create public, private, and password-protected CometChat groups with the Android SDK and configure group details.

<Accordion title="AI Integration Quick Reference">
  ```kotlin theme={null}
  // Create a public group
  val group = Group("GUID", "Group Name", CometChatConstants.GROUP_TYPE_PUBLIC, "")
  CometChat.createGroup(group, object : CometChat.CallbackListener<Group>() {
      override fun onSuccess(group: Group) { }
      override fun onError(e: CometChatException) { }
  })

  // Create with members
  val groupMembers = listOf(
      GroupMember("uid1", CometChatConstants.SCOPE_ADMIN),
      GroupMember("uid2", CometChatConstants.SCOPE_PARTICIPANT)
  )
  CometChat.createGroupWithMembers(group, groupMembers, emptyList(), callback)
  ```
</Accordion>

## Create a Group

Use `createGroup()` with a [`Group`](/sdk/reference/entities#group) object. The `groupType` must be one of:

1. `CometChatConstants.GROUP_TYPE_PUBLIC`
2. `CometChatConstants.GROUP_TYPE_PASSWORD`
3. `CometChatConstants.GROUP_TYPE_PRIVATE`

<Tabs>
  <Tab title="Java">
    ```java theme={null}
    private String GUID = "GUID";
    private String groupName = "Hello Group!";
    private String groupType = CometChatConstants.GROUP_TYPE_PUBLIC;
    private String password = "";

    Group group = new Group(GUID, groupName, groupType, password);

    CometChat.createGroup(group, new CometChat.CallbackListener<Group>(){
    @Override
    public void onSuccess(Group group) {
      Log.d(TAG, "Group created successfully: " + group.toString());
    }
    @Override
    public void onError(CometChatException e) {
      Log.d(TAG, "Group creation failed with exception: " + e.getMessage());
    }
    });
    ```
  </Tab>

  <Tab title="Kotlin">
    ```kotlin theme={null}
    val GUID:String="GUID"
    val groupName:String="Hello Group"
    val groupType:String=CometChatConstants.GROUP_TYPE_PUBLIC
    val password:String=""

    val group=Group(GUID,groupName,groupType,password)

    CometChat.createGroup(group,object :CometChat.CallbackListener<Group>(){
    override fun onSuccess(p0: Group?) {
      Log.d(TAG, "Group created successfully: " + p0?.toString())
    }
    override fun onError(p0: CometChatException?) {
      Log.d(TAG, "Group creation failed with exception: " + p0?.message)
    }
    })
    ```
  </Tab>
</Tabs>

The `createGroup()` method takes the following parameters:

| Parameter | Description                  |
| --------- | ---------------------------- |
| `group`   | An instance of `Group` class |

After the successful creation of the group, you will receive an instance of the `Group` class which contains all the information about the particular group.

<Warning>
  GUID can be alphanumeric with underscore and hyphen. Spaces, punctuation, and other special characters are not allowed.
</Warning>

## Add members while creating a group

You can create a group and add members at the same time using the `createGroupWithMembers()` method. This method takes the [`Group`](/sdk/reference/entities#group) object, an array of [`GroupMember`](/sdk/reference/entities#groupmember) objects to be added, and an array of `UIDs` to be banned.

To create an object of the `Group` class, you can use either of the following constructors:

1. `new Group(String GUID, String name, String groupType, String password)`
2. `new Group(String GUID, String name, String groupType, String password, String icon, String description)`

The `groupType` needs to be one of the following values:

1. `CometChat.GROUP_TYPE.PUBLIC`
2. `CometChat.GROUP_TYPE.PASSWORD`
3. `CometChat.GROUP_TYPE.PRIVATE`

To create an object of the [`GroupMember`](/sdk/reference/entities#groupmember) class, you can use the following constructor:

* `new GroupMember(String UID, String scope)`

<Tabs>
  <Tab title="Java">
    ```java theme={null}
    Group group = new Group("test_1", "Test 1", CometChatConstants.GROUP_TYPE_PUBLIC,null);

    List<GroupMember> groupMembers = new ArrayList<>();
    groupMembers.add(new GroupMember("cometchat-uid-1",CometChatConstants.SCOPE_ADMIN));
    groupMembers.add(new GroupMember("cometchat-uid-2",CometChatConstants.SCOPE_MODERATOR));
    groupMembers.add(new GroupMember("cometchat-uid-3",CometChatConstants.SCOPE_PARTICIPANT));

    List<String> bannedUIDs = new ArrayList<>();
    bannedUIDs.add("cometchat-uid-4");

    CometChat.createGroupWithMembers(group, groupMembers, bannedUIDs, new CometChat.CreateGroupWithMembersListener() {
    @Override
    public void onSuccess(Group group, HashMap<String, String> hashMap) {
      Logger.error(TAG, group.toString());
      Logger.error(TAG, hashMap.toString());
    }

    @Override
    public void onError(CometChatException e) {
      Logger.error(TAG, e.getMessage());
    }
    });
    ```
  </Tab>

  <Tab title="Kotlin">
    ```kotlin theme={null}
    val group = Group("test_1", "Test 1", CometChatConstants.GROUP_TYPE_PUBLIC, null)

    val groupMembers: MutableList<GroupMember> = ArrayList()
    groupMembers.add(GroupMember("cometchat-uid-1", CometChatConstants.SCOPE_ADMIN))
    groupMembers.add(GroupMember("cometchat-uid-2", CometChatConstants.SCOPE_MODERATOR))
    groupMembers.add(GroupMember("cometchat-uid-3", CometChatConstants.SCOPE_PARTICIPANT))

    val bannedUIDs: MutableList<String> = ArrayList()
    bannedUIDs.add("cometchat-uid-4")

    CometChat.createGroupWithMembers(
    group,
    groupMembers,
    bannedUIDs,
    object : CreateGroupWithMembersListener() {
      override fun onSuccess(group: Group, hashMap: HashMap<String?, String?>) {
        Logger.error(TAG, group.toString())
        Logger.error(TAG, hashMap.toString())
      }

      override fun onError(e: CometChatException) {
        Logger.error(TAG, e.message)
      }
    })
    ```
  </Tab>
</Tabs>

The `onSuccess()` block of this method provides you with 2 sets of information:

1. `Group`: The group object containing information about the group that was created.
2. `HashMap<String, String>`: A HashMap that contains the UID of the user that was supposed to be added as the key and `success` or an error message as the value.

## Group Class

| Field        | Editable                                                        | Information                                                               |
| ------------ | --------------------------------------------------------------- | ------------------------------------------------------------------------- |
| guid         | Needs to be specified at group creation. Cannot be edited later | A unique identifier for a group                                           |
| name         | Yes                                                             | Name of the group                                                         |
| type         | No                                                              | Type of the group: Can be 1. Public 2. Password 3. Private                |
| password     | No                                                              | Password for the group in case the group is of type password.             |
| icon         | Yes                                                             | An URL to group icon                                                      |
| description  | Yes                                                             | Description about the group                                               |
| owner        | Yes                                                             | UID of the owner of the group.                                            |
| metadata     | Yes                                                             | Additional data for the group as JSON                                     |
| createdAt    | No                                                              | The unix timestamp of the time the group was created                      |
| updatedAt    | No                                                              | The unix timestamp of the time the group was last updated                 |
| hasJoined    | No                                                              | A boolean to determine if the logged in user is a member of the group.    |
| joinedAt     | No                                                              | The unix timestamp of the time the logged in user joined the group.       |
| scope        | Yes                                                             | Scope of the logged in user. Can be: 1. Admin 2. Moderator 3. Participant |
| membersCount | No                                                              | The number of members in the groups                                       |
| tags         | Yes                                                             | A list of tags to identify specific groups.                               |

## Group Payload Structure

<Accordion title="Group Object">
  The `Group` object returned by SDK methods contains the following fields:

  | Parameter           | Type           | Description                                                                        |
  | ------------------- | -------------- | ---------------------------------------------------------------------------------- |
  | `guid`              | String         | Unique identifier of the group                                                     |
  | `name`              | String         | Display name of the group                                                          |
  | `type`              | String         | Group type. Values: `"public"`, `"private"`, `"password"`                          |
  | `password`          | String         | Password for protected groups (null for public/private groups)                     |
  | `icon`              | String         | URL to group icon image                                                            |
  | `description`       | String         | Description of the group                                                           |
  | `owner`             | String         | UID of the group owner                                                             |
  | `metadata`          | JSONObject     | Custom data set by developer. Can contain any key-value pairs                      |
  | `createdAt`         | long           | Unix timestamp when group was created                                              |
  | `updatedAt`         | long           | Unix timestamp of last group update                                                |
  | `hasJoined`         | boolean        | Whether the logged-in user has joined this group                                   |
  | `joinedAt`          | long           | Unix timestamp when logged-in user joined the group                                |
  | `scope`             | String         | Logged-in user's scope in group. Values: `"admin"`, `"moderator"`, `"participant"` |
  | `membersCount`      | int            | Total number of members in the group                                               |
  | `tags`              | Array\<String> | List of tags for group identification and filtering                                |
  | `isBannedFromGroup` | boolean        | Whether the logged-in user is banned from this group                               |

  **Sample Group Object:**

  ```json theme={null}
  {
    "guid": "group_123",
    "name": "Developers",
    "type": "public",
    "password": null,
    "icon": "https://example.com/icon.png",
    "description": "A group for developers",
    "owner": "user_123",
    "metadata": {
      "category": "tech",
      "isVerified": true
    },
    "createdAt": 1699800000,
    "updatedAt": 1699900000,
    "hasJoined": true,
    "joinedAt": 1699850000,
    "scope": "admin",
    "membersCount": 25,
    "tags": ["official", "support"],
    "isBannedFromGroup": false
  }
  ```
</Accordion>

***

## Next Steps

<CardGroup cols={2}>
  <Card title="Join Group" icon="user-plus" href="/sdk/android/join-group">
    Join existing groups to participate in conversations
  </Card>

  <Card title="Add Members" icon="user-group" href="/sdk/android/group-add-members">
    Add members to your created groups
  </Card>

  <Card title="Update Group" icon="pen" href="/sdk/android/update-group">
    Modify group details and settings
  </Card>

  <Card title="Send Messages" icon="paper-plane" href="/sdk/android/send-message">
    Start sending messages in your group
  </Card>
</CardGroup>