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Overview

CometChatAddMembers is a Component that empowers administrators or group owners with the ability to expand group membership by seamlessly adding new participants. This component facilitates effortless management of group membership and enhances collaboration within the group’s discussions and activities. Administrators can meticulously select desired users to join the group, whether by targeted search or from a list of available users. Selected users receive notifications, streamlining the process of joining the group and ensuring smooth integration into the community.
The CometChatAddMembers component is composed of the following BaseComponents:
ComponentsDescription
CometChatUsersCometChatUsers is a standalone component that presents a user list and enables targeted user searches. As a container inheriting from CometChatListBase, it seamlessly incorporates the CometChatUserList component. This setup streamlines user browsing and search capabilities, enhancing overall usability and facilitating efficient interactions.
CometChatListItemThis component renders information extracted from a User object onto a tile, featuring a title, subtitle, leading view, and trailing view. experience, facilitating seamless navigation and interaction within the component.

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Usage

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Integration

CometChatAddMembers, as a Composite Component, offers flexible integration options, allowing it to be launched directly via button clicks or any user-triggered action. Additionally, it seamlessly integrates into tab view controllers. With add members, users gain access to a wide range of parameters and methods for effortless customization of its user interface. The following code snippet exemplifies how you can seamlessly integrate the GroupMembers component into your application. 
<com.cometchat.chatuikit.addmembers.CometChatAddMembers
    android:id="@+id/add_members"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />
If you’re defining the Group members within the XML code, you’ll need to extract them and set them on the Group object using the appropriate method. 
CometChatAddMembers cometchatAddMembers = binding.groupMember;

Group group = new Group();
group.setGuid("GROUP_ID");
group.setName("GROUP_NAME");

cometchatAddMembers.setGroup(group);

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Actions

Actions dictate how a component functions. They are divided into two types: Predefined and User-defined. You can override either type, allowing you to tailor the behavior of the component to fit your specific needs.
1. SetOnItemClick
This method proves valuable when users seek to override onItemClick functionality within CometChatAddMembers, empowering them with greater control and customization options. The setOnItemClick action doesn’t have a predefined behavior. You can override this action using the following code snippet. 
cometchatAddMembers.setItemClickListener(new OnItemClickListener<User>() {
    @Override
    public void OnItemClick(User user, int i) {

    }

});
2. OnSelection
The OnSelection event is triggered upon the completion of a selection in SelectionMode. It does not have a default behavior. However, you can override its behavior using the following code snippet.
YourActivity.java
cometchatAddMembers.setSelectionMode(UIKitConstants.SelectionMode.MULTIPLE);
cometchatAddMembers.setOnSelection(new CometChatUsers.OnSelection() {
    @Override
    public void onSelection(List<User> list) {
        // Handle selected members here
    }
});
3. SetOnError
You can customize this behavior by using the provided code snippet to override the On Error and improve error handling. 
cometchatAddMembers.setOnError(new OnError() {
    @Override
    public void onError(Context context, CometChatException e) {

    }

});
4. AddOnBackPressListener
You can customize this behavior by using the provided code snippet to override the addOnBackPressListener and improve error handling. 
cometchatAddMembers.addOnBackPressListener(new CometChatListBase.OnBackPress() {
    @Override
    public void onBack() {

    }

});

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Filters

Filters allow you to customize the data displayed in a list within a Component. You can filter the list based on your specific criteria, allowing for a more customized. Filters can be applied using RequestBuilders of Chat SDK.
1. UsersRequestBuilder
The UsersRequestBuilder enables you to filter and customize the group list based on available parameters in UsersRequestBuilder. This feature allows you to create more specific and targeted queries when fetching users. The following are the parameters available in UsersRequestBuilder
PropertyDescriptionCode
LimitConfigure the maximum number of groups to fetch in a single request, optimizing pagination for smoother navigation..setLimit(Int)
Search KeywordEmployed to retrieve groups that match the provided string, facilitating precise searches..setSearchKeyword(String)
TagsUsed for fetching users containing the passed tags..setTags(List<String>)
RolesUsed for fetching users containing the passed roles..setRoles(List<String>)
UIDsUsed for fetching users containing the passed UIDs..setUIDs(List<String>)
User StatusUsed for fetching users by their status online or offline..setUserStatus(String)
Example 
UsersRequest.UsersRequestBuilder usersRequestBuilder = new UsersRequest.UsersRequestBuilder()
        .setLimit(LIMIT)
        .setTags(new ArrayList<>())
        .setRoles(new ArrayList<>())
        .setUIDs(new ArrayList<>())
        .setUserStatus(STATUS);

cometchatAddMembers.setUsersRequestBuilder(usersRequestBuilder);
2. SearchRequestBuilder
The SearchRequestBuilder uses UsersRequestBuilder enables you to filter and customize the search list based on available parameters in UsersRequestBuilder. This feature allows you to keep uniformity between the displayed User List and searched User List. Example 
UsersRequest.UsersRequestBuilder usersRequestBuilder = new UsersRequest.UsersRequestBuilder()
        .setLimit(LIMIT)
        .setSearchKeyword(SEARCH_KEYWORD);

cometchatAddMembers.setSearchRequestBuilder(usersRequestBuilder);

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Events

Events are emitted by a Component. By using event you can extend existing functionality. Being global events, they can be applied in Multiple Locations and are capable of being Added or Removed. Events emitted by the Join Group component is as follows.
EventDescription
ccGroupMemberAddedTriggers when a user added to a group successfully
CometChatGroupEvents.addGroupListener("LISTENER_ID", new CometChatGroupEvents() {
    @Override
    public void ccGroupMemberAdded(List<Action> actionMessages, List<User> usersAdded, Group userAddedIn, User addedBy) {
        super.ccGroupMemberAdded(actionMessages, usersAdded, userAddedIn, addedBy);
    }
});
Remove the added listener 
CometChatGroupEvents.removeListener("LISTENER_ID");

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Customization

To fit your app’s design requirements, you can customize the appearance of the Groups component. We provide exposed methods that allow you to modify the experience and behavior according to your specific needs.

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Style

Using Style you can customize the look and feel of the component in your app, These parameters typically control elements such as the color, size, shape, and fonts used within the component.
1. AddMembers Style
To apply customized styles to the AddMembers component in the Group Member Component, you can use the following code snippet. 
AddMembersStyle addMembersStyle = new AddMembersStyle();
addMembersStyle.setBackground(getResources().getColor(android.R.color.holo_red_dark));
addMembersStyle.setTitleColor(getResources().getColor(R.color.red));

cometchatAddMembers.setStyle(addMembersStyle);
List of properties exposed by AddMembersStyle
MethodsTypeDescription
Background@ColorInt intUsed to set the background color
Border WidthintUsed to set border
Border Color@ColorInt intUsed to set border color
Corner RadiusfloatUsed to set border radius
BackgroundDrawableUsed to set background Drawable
Title Appearance@StyleRes intUsed to customise the appearance of the title in the app bar
Back Icon Tint@ColorInt intUsed to set the color of the back icon in the app bar
Search Background@ColorInt intUsed to set the background color of the search box
Search Border RadiusintUsed to set the border radius of the search box
Search Icon Tint@ColorInt intUsed to set the color of the search icon in the search box
Search Border WidthintUsed to set the border width of the search box
Search Text Appearance@StyleRes intUsed to set the style of the text in the search box
Loading Icon Tint@ColorInt intUsed to set the color of the icon shown while the list of group members is being fetched
Empty Text Appearance@StyleRes intUsed to set the style of the response text shown when fetchig the list of group members has returned an empty list
Error Text Appearance@StyleRes intUsed to set the style of the response text shown in case some error occurs while fetching the list of group members
Online Status Color@ColorInt intUsed to set the color of the status indicator shown if a group member is online
Separator Color@ColorInt intUsed to set the color of the divider separating the group member items
Section Header TextAppearance@StyleRes intUsed to customise the appearance of the section header text.
Section Header TextColor@ColorInt intUsed to set the color of the section header text.
2. Avatar Style
To apply customized styles to the Avatar component in the Group Member Component, you can use the following code snippet. For further insights on Avatar Styles refer 
AvatarStyle avatarStyle = new AvatarStyle();
avatarStyle.setBorderWidth(10);
avatarStyle.setBorderColor(Color.BLACK);
cometchatAddMembers.setAvatarStyle(avatarStyle);
3. StatusIndicator Style
To apply customized styles to the Status Indicator component in the Group Member Component, You can use the following code snippet. For further insights on Status Indicator Styles refer 
StatusIndicatorStyle statusIndicatorStyle = new StatusIndicatorStyle();
statusIndicatorStyle.setCornerRadius(3.5f);
statusIndicatorStyle.setBorderColor(Color.GREEN);
cometchatAddMembers.setStatusIndicatorStyle(statusIndicatorStyle);
4. ListItem Style
To apply customized styles to the List Item component in the Group Member Component, you can use the following code snippet. For further insights on List Item Styles refer 
ListItemStyle listItemStyle = new ListItemStyle();
listItemStyle.setBackground(R.color.purple_200);
listItemStyle.setBorderWidth(2);
listItemStyle.setBorderColor(R.color.purple_700);
listItemStyle.setCornerRadius(20);
cometchatAddMembers.setListItemStyle(listItemStyle);

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Functionality

These are a set of small functional customizations that allow you to fine-tune the overall experience of the component. With these, you can change text, set custom icons, and toggle the visibility of UI elements. 
cometchatAddMembers.setTitle("Your Title");
cometchatAddMembers.disableUsersPresence(true);
cometchatAddMembers.hideSeparator(true);
List of functionality exposed by CometChatAddMembers | Property | Description | Code | | --------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------ | --- | | Group | The group to which the users selected will be added. A required parameter. | .setGroup(Group) | | Title | Used to set title in the app bar | .setTitle(String) | | Style | Used to set styling properties | .setStyle(AddMembersStyle) | | Avatar Style | Used to customise the Avatar of the group member | .setAvatarStyle(AvatarStyle) | | Status Indicator Style | Used to customise the status indicator shown if a group member is online | .setStatusIndicatorStyle(StatusIndicatorStyle) | | Search Placeholder Text | Used to set search placeholder text | .setSearchPlaceholderText(String) | | Back Icon | Used to set back button icon | .backIcon(@DrawableRes int res) | | Show Back Button | Used to toggle visibility for back button | .showBackButton(boolean) | | Search Box Icon | Used to set search Icon in the search field | .setSearchBoxIcon(@DrawableRes int res) | | Hide Search | Used to toggle visibility for search box | .hideSearch(boolean) | | Hide Error | Used to hide error on fetching users and failing to add selected users to the group. | .hideError(boolean) | | Hide Separator | Used to hide the divider separating the user items | .hideSeparator(boolean) | | Hide Section Separator | Used to hide the text separating grouped user items | .hideSectionSeparator(boolean) | | Disable Users Presence | Used to control visibility of user indicator shown if user is online | .disableUsersPresence(boolean) | | Selection Icon | Used to override the default selection complete icon | .setSelectionIcon(@DrawableRes int res) | | Submit Icon | Used to override the default selection complete icon | .setSubmitIcon(@DrawableRes int res) | | Selection Mode | Used to set the number of users that can be selected. By default it is SelectionMode.multiple. SelectionMode can be single, multiple or none. | .setSelectionMode(SelectionMode) | |

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Advanced

For advanced-level customization, you can set custom views to the component. This lets you tailor each aspect of the component to fit your exact needs and application aesthetics. You can create and define your own views, layouts, and UI elements and then incorporate those into the component. The Add Members component does not provide additional functionalities beyond this level of customization.

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SetListItemView

With this function, you can assign a custom ListItem to the Conversations Component. 
cometchatAddMembers.setListItemView(new UsersViewHolderListener() {
    @Override
    public View createView(Context context, CometChatListItem cometChatListItem) {
        return null;
    }

    @Override
    public void bindView(Context context, View view, User user, RecyclerView.ViewHolder viewHolder, List<User> list, int i) {

    }
});
Example
You can indeed create a custom layout file named item_list.xml for more complex or unique list items. Once this layout file is made, you would inflate it inside the createView() method of the UsersViewHolderListener. The inflation process prepares the layout for use in your application: Following this, you would use the bindView() method to initialize and assign values to your individual views. This could include setting text on TextViews, images on ImageViews, and so on based on the properties of the Group object:
item_list.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:elevation="10dp"
        app:cardBackgroundColor="@color/purple_500"
        app:cardCornerRadius="10dp">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <com.cometchat.chatuikit.shared.views.CometChatAvatar.CometChatAvatar
                android:id="@+id/item_avatar"
                android:layout_width="50dp"
                android:layout_height="50dp"
                android:layout_centerVertical="true"
                android:layout_margin="10dp"
                android:padding="10dp" />

            <TextView
                android:id="@+id/txt_item_name"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_toRightOf="@+id/item_avatar"
                android:text="name"
                android:textSize="17sp" />

            <TextView
                android:id="@+id/txt_item_date"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_centerVertical="true"
                android:layout_margin="10dp"
                android:text="date"
                android:textSize="12sp" />
        </RelativeLayout>
    </androidx.cardview.widget.CardView>
</RelativeLayout>
YourActivity.java
cometchatAddMembers.setListItemView(new UsersViewHolderListener() {
    @Override
    public View createView(Context context, CometChatListItem cometChatListItem) {
        View view = getLayoutInflater().inflate(R.layout.item_list, null);
        return view;
    }

    @Override
    public void bindView(Context context, View view, User user, RecyclerView.ViewHolder viewHolder, List<User> list, int i) {
        CometChatAvatar avatarView = view.findViewById(R.id.item_avatar);
        avatarView.setRadius(100);
        TextView nameView = view.findViewById(R.id.txt_item_name);
        nameView.setText(user.getName());
        avatarView.setImage(user.getAvatar());
    }
});

​
SetSubTitleView

You can customize the subtitle view for each conversation item to meet your requirements 
cometchatAddMembers.setSubTitleView(new UsersViewHolderListener() {
    @Override
    public View createView(Context context, CometChatListItem cometChatListItem) {
        return null;
    }

    @Override
    public void bindView(Context context, View view, User user, RecyclerView.ViewHolder viewHolder, List<User> list, int i) {

    }
});
Example
You can indeed create a custom layout file named subtitle_layout.xml for more complex or unique list items. Once this layout file is made, you would inflate it inside the createView() method of the UsersViewHolderListener. The inflation process prepares the layout for use in your application: Following this, you would use the bindView() method to initialize and assign values to your individual views. This could include setting text on TextViews, images on ImageViews, and so on based on the properties of the Group object:
subtitle_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/txt_subtitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Subtitle" />

    <ImageView
        android:id="@+id/img_conversation"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txt_subtitle"
        android:layout_margin="2dp"
        android:src="@drawable/ic_message_grey" />

    <ImageView
        android:id="@+id/img_audio_call"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txt_subtitle"
        android:layout_margin="2dp"
        android:layout_toEndOf="@+id/img_conversation"
        android:src="@drawable/ic_call" />

    <ImageView
        android:id="@+id/img_video_call"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txt_subtitle"
        android:layout_margin="2dp"
        android:layout_toEndOf="@+id/img_audio_call"
        android:src="@drawable/ic_video" />

</RelativeLayout>
YourActivity.java
cometchatAddMembers.setSubTitleView(new UsersViewHolderListener() {
    @Override
    public View createView(Context context, CometChatListItem cometChatListItem) {
        View view = getLayoutInflater().inflate(R.layout.subtitle_layout, null);
        return view;
    }

    @Override
    public void bindView(Context context, View view, User user, RecyclerView.ViewHolder viewHolder, List<User> list, int i) {
        TextView txtSubtitle = view.findViewById(R.id.txt_subtitle);
        ImageView imgConversation = view.findViewById(R.id.img_conversation);
        ImageView imgAudioCall = view.findViewById(R.id.img_audio_call);;
        ImageView imgVideCall = view.findViewById(R.id.img_video_call);;
        txtSubtitle.setText(user.getName());
        imgConversation.setOnClickListener(v -> {
            Toast.makeText(context, "Conversation Clicked", Toast.LENGTH_SHORT).show();
        });
        imgAudioCall.setOnClickListener(v -> {
            Toast.makeText(context, "Audio Call Clicked", Toast.LENGTH_SHORT).show();
        });
        imgVideCall.setOnClickListener(v -> {
            Toast.makeText(context, "Video Call Clicked", Toast.LENGTH_SHORT).show();
        });
    }
});

​
SetTailView

Used to generate a custom trailing view for the GroupList item. You can add a Tail view using the following method. 
cometchatAddMembers.setTailView(new UsersViewHolderListener() {
    @Override
    public View createView(Context context, CometChatListItem cometChatListItem) {
        return null;
    }

    @Override
    public void bindView(Context context, View view, User user, RecyclerView.ViewHolder viewHolder, List<User> list, int i) {

    }
});
Example
You can indeed create a custom layout file named tail_view_layout.xml for more complex or unique list items. Once this layout file is made, you would inflate it inside the createView() method of the UsersViewHolderListener. The inflation process prepares the layout for use in your application: Following this, you would use the bindView() method to initialize and assign values to your individual views. This could include setting text on TextViews, images on ImageViews, and so on based on the properties of the Group object:
tail_view_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/txt_subtitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Subtitle" />

    <ImageView
        android:id="@+id/img_conversation"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txt_subtitle"
        android:layout_margin="2dp"
        android:src="@drawable/ic_message_grey" />

    <ImageView
        android:id="@+id/img_audio_call"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txt_subtitle"
        android:layout_margin="2dp"
        android:layout_toRightOf="@+id/img_conversation"
        android:src="@drawable/ic_call" />

    <ImageView
        android:id="@+id/img_video_call"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/txt_subtitle"
        android:layout_margin="2dp"
        android:layout_toRightOf="@+id/img_audio_call"
        android:src="@drawable/ic_video" />

</RelativeLayout>
YourActivity.java
cometchatAddMembers.setTailView(new UsersViewHolderListener() {
    @Override
    public View createView(Context context, CometChatListItem cometChatListItem) {
        View view = getLayoutInflater().inflate(R.layout.subtitle_layout, null);
        return view;
    }

    @Override
    public void bindView(Context context, View view, User user, RecyclerView.ViewHolder viewHolder, List<User> list, int i) {
        TextView txtSubtitle = view.findViewById(R.id.txt_subtitle);
        ImageView imgConversation = view.findViewById(R.id.img_conversation);
        ImageView imgAudioCall = view.findViewById(R.id.img_audio_call);;
        ImageView imgVideCall = view.findViewById(R.id.img_video_call);;
        txtSubtitle.setText(user.getName());
        imgConversation.setOnClickListener(v -> {
            Toast.makeText(context, "Conversation Clicked", Toast.LENGTH_SHORT).show();
        });
        imgAudioCall.setOnClickListener(v -> {
            Toast.makeText(context, "Audio Call Clicked", Toast.LENGTH_SHORT).show();
        });
        imgVideCall.setOnClickListener(v -> {
            Toast.makeText(context, "Video Call Clicked", Toast.LENGTH_SHORT).show();
        });
    }
});

​
SetMenu

You can set the Custom Menu view to add more options to the Groups component. 
cometchatAddMembers.setMenu(View v);
Example
You need to create a view_menu.xml as a custom view file. Which we will inflate and pass to .setMenu().
view_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/img_refresh"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:src="@drawable/ic_refresh_black" />

</LinearLayout>
You inflate the view and pass it to setMenu. You can get the child view reference and can handle click actions.
YourActivity.java
View view = getLayoutInflater().inflate(R.layout.view_menu, null);
ImageView imgRefresh = view.findViewById(R.id.img_refresh);
imgRefresh.setOnClickListener(v -> {
    Toast.makeText(requireContext(), "Clicked on Refresh", Toast.LENGTH_SHORT).show();
});
cometchatAddMembers.setMenu(view);

​
SetLoadingStateView

You can set a custom loader view using setLoadingStateView to match the loading view of your app. 
cometchatAddMembers.setLoadingStateView();
Example
We have added a ContentLoadingProgressBar to loading_view_layout.xml. You can choose any view you prefer. This view should be inflated and passed to the setLoadingStateView() method.
loading_view_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center_vertical">

    <androidx.core.widget.ContentLoadingProgressBar
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal" />

</FrameLayout>
YourActivity.java
cometchatAddMembers.setLoadingStateView(R.layout.loading_view_layout);

​
SetEmptyStateView

You can set a custom EmptyStateView using setEmptyStateView to match the empty view of your app. 
cometchatAddMembers.setEmptyStateView();
Examples We have added an error view to empty_view_layout.xml. You can choose any view you prefer. This view should be inflated and passed to the setEmptyStateView() method.
empty_view_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center_vertical">

    <TextView
        android:id="@+id/txt_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="No Friends available"
        android:textColor="@color/cometchat_grey"
        android:textSize="20sp"
        android:textStyle="bold" />

</RelativeLayout>
YourActivity.java
cometchatAddMembers.setEmptyStateView(R.layout.empty_view_layout);

​
SetErrorStateView

You can set a custom ErrorStateView using setErrorStateView to match the error view of your app. 
cometchatAddMembers.setErrorStateView();
Example
We have added an error view to error_state_view_layout.xml. You can choose any view you prefer. This view should be inflated and passed to the setErrorStateView() method.
error_state_view_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/img_error"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_centerInParent="true"
        android:src="@drawable/ic_error" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/img_error"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="50dp"
        android:text="Something Went Wrong"
        android:textSize="30sp" />

</RelativeLayout>
YourActivity.java
cometchatAddMembers.setErrorStateView(R.layout.error_state_view_layout);