UIKit Android v3
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This is the new Docs for UIKit v3 beta for Android. To see the previous Docs, click here.

Migration Guide

UIKit v3 beta for Android is now available. The biggest change from v2 to v3 is modularization, which allows you to build and customize views at a component level. You can execute key functions, such as list channels, using a fragment, module, and view model. Each fragment has a module that creates the view, and each module is made up of components. A fragment also has a corresponding ViewModel that provides the necessary data and APIs from Sendbird Chat SDK. This new architecture allows for easier and more detailed customization.

When migrating from v2 to v3, there are several breaking changes you need to remember. Since modules and view models are one of the main parts of the new architecture, you need to make changes to the existing codes in your client app. Refer to the breaking changes below.


Key functions

Key functions are carried out on a screen basis, meaning each function corresponds to a single screen. In v3, a key function is composed of three main components: fragment, module, and ViewModel. Refer to the table below to see which key functions we provide and the components that make up each key function.

Key functionFragmentModuleComponentViewModel

List channels

ChannelListFragment

ChannelListModule

HeaderComponent

ChannelListComponent

StatusComponent

ChannelListViewModel

Chat in a group channel

ChannelFragment

ChannelModule

ChannelHeaderComponent

MessageListComponent

MessageInputComponent

StatusComponent

ChannelViewModel

Chat in an open channel

OpenChannelFragment

OpenChannelModule

OpenChannelHeaderComponent

OpenChannelMessageListComponent

OpenChannelMessageInputComponent

StatusComponent

OpenChannelViewModel

Create a group channel

CreateChannelFragment

CreateChannelModule

SelectUserHeaderComponent

CreateChannelUserListComponent

StatusComponent

CreateChannelViewModel

Configure group channel settings

ChannelSettingsFragment

ChannelSettingsModule

ChannelSettingsHeaderComponent

ChannelSettingsInfoComponent

ChannelSettingsMenuComponent

ChannelSettingsViewModel

Configure open channel settings

OpenChannelSettingsFragment

OpenChannelSettingsModule

OpenChannelSettingsHeaderComponent

OpenChannelSettingsInfoComponent

OpenChannelSettingsMenuComponent

OpenChannelSettingsViewModel

Invite users

InviteUserFragment

InviteUserModule

SelectUserHeaderComponent

InviteUserListComponent

StatusComponent

InviteUserViewModel

Promote to operator

PromoteOperatorFragment

PromoteOperatorModule

SelectUserHeaderComponent

PromoteOperatorListComponent

StatusComponent

PromoteOperatorViewModel

List channel members

MemberListFragment

MemberListModule

HeaderComponent

MemberListComponent

StatusComponent

MemberListViewModel

List channel participants

ParticipantsListFragment

ParticipantListModule

HeaderComponent

ParticipantListComponent

StatusComponent

ParticipantListViewModel

List banned users

BannedUserListFragment

BannedUserListModule

HeaderComponent

BannedUserListComponent

StatusComponent

BannedUserListViewModel

List muted members

MutedMemberListFragment

MutedMemberListModule

HeaderComponent

MutedMemberListComponent

StatusComponent

MutedMemberListViewModel

List operators

OperatorListFragment

OperatorListModule

HeaderComponent

OperatorListComponent

StatusComponent

OperatorListViewModel

Moderate channels and members

ModerationFragment

ModerationModule

HeaderComponent

ModerationListComponent

ModerationViewModel

Search messages

MessageSearchFragment

MessageSearchModule

MessageSearchHeaderComponent

MessageSearchListComponent

StatusComponent

MessageSearchViewModel


Configuration changes

To migrate to the new version, open the build.gradle file at the application level. For both Java and Kotlin, add the code blocks and dependencies as follows:

android {
    defaultConfig {
        minSdkVersion 21
    }
    buildFeatures {
        viewBinding true
    }
}

API changes in all fragments

In v3, there are new changes to APIs that create and customize fragments. Refer to the breaking changes that apply to all fragments in the UIKit below.

Change default setter method value

In v2, the default value of the setter method in a fragment was set to false. But in v3, the value has changed to true. For example, the default value of the setUseHeader() method in the HeaderComponent of ChannelListFragment was previously false but it's now changed to true. In fragments that previously didn't use a header region in v2, you must now manually change the value to false if you don't wish to use it in v3. When using custom fragments, call the onConfigureParams method to access the setter methods that were previously provided by the builder. Refer to the codes below.

Fragment fragment = new ChannelListFragment.Builder().build();
// Use non-customized fragments through the builder.
Fragment fragment = new ChannelListFragment.Builder()
    .setUseHeader(false)
    .build();

// Use custom fragments.
public class CustomChannelListFragment extends ChannelListFragment {
    @Override
    protected void onConfigureParams(@NonNull ChannelListModule module, @NonNull Bundle args) {
        final ChannelListModule.Params params = module.getParams();
        params.setUseHeader(false);
    }
}

Customize theme

Starting in v3, you can't apply a custom theme to customized fragments using a fragment.builder() class. In order to do so, you must call the Params class of the fragment and set the style resource as a parameter. For non-custom fragments, you can apply a custom theme using the builder class. See the codes below.

Fragment fragment = new ChannelListFragment.Builder(R.style.custom_theme_resource_id).build();
// Apply custom theme to non-customized fragments through the builder.
Fragment fragment = new ChannelListFragment.Builder(R.style.custom_theme_resource_id).build();

// Apply custom theme to customized fragments.
public class CustomChannelListFragment extends ChannelListFragment {
    @Override
    protected ChannelListModule onCreateModule(Bundle args) {
        final ChannelListModule.Params params = new ChannelListModule.Params(context, R.string.custom_theme_resource_id);
        return new ChannelListModule(requireContext(), params);
    }
}

Note: Go to the Customize style resource page to learn more.


Custom fragment changes

Unlike v2, the new version doesn't allow you to use custom fragments through fragment.builder() to create a view. You can only use default fragments through the builder class. See the guide below on how to build your own custom fragment.

Create a custom fragment

  1. Inherit the fragment you wish to make changes to and create a custom fragment.
  2. In each fragment.builder() class, there are UI-related APIs such as view properties, methods, and event handlers. To customize each fragment, you must override those setter methods. Refer to the following codes on how to build a custom ChannelListFragment as an example.
ChannelListFragment Fragment = new ChannelListFragment.Builder()
    .setCustomChannelListFragment(new CustomChannelListFragment())
    .setUseHeader(true)
    .setHeaderTitle("Channels")
    .setUseHeaderLeftButton(true)
    .setUseHeaderRightButton(true)
    .setHeaderLeftButtonIconResId(R.drawable.icon_arrow_left)
    .setHeaderRightButtonIconResId(R.drawable.icon_create)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setHeaderRightButtonListener(rightButtonListener)
    .setChannelListAdapter(adapter)
    .setItemClickListener(itemClickListener)
    .setItemLongClickListener(itemLongClickListener)
    .setGroupChannelListQuery(query)
    .setEmptyIcon(R.drawable.icon_chat)
    .setEmptyText(R.string.text_empty)
    .build();
public class CustomChannelListFragment extends ChannelListFragment {
    @Override
    protected void onConfigureParams(@NonNull ChannelListModule module, @NonNull Bundle args) {
        final HeaderComponent.Params headerParams = module.getHeaderComponent().getParams();
        headerParams.setTitle("title");
        headerParams.setUseRightButton(false);
        headerParams.setUseLeftButton(false);
        headerParams.setLeftButtonIcon(leftButtonDrawable);
        headerParams.setRightButtonIcon(rightButtonDrawable);

        final StatusComponent.Params statusParams = module.getStatusComponent().getParams();
        statusParams.setEmptyIcon(emptyDrawable);
        statusParams.setEmptyIconTint(emptyIconTint);
        statusParams.setEmptyText("empty text");
    }

    @Override
    protected void onBeforeReady(@NonNull ReadyStatus status, @NonNull ChannelListModule module, @NonNull ChannelListViewModel viewModel) {
        super.onBeforeReady(status, module, viewModel);
        module.getChannelListComponent().setAdapter(adapter);
    }

    @Override
    protected void onBindHeaderComponent(@NonNull HeaderComponent headerComponent, @NonNull ChannelListViewModel viewModel) {
        super.onBindHeaderComponent(headerComponent, viewModel);
        headerComponent.setOnLeftButtonClickListener(leftButtonListener);
        headerComponent.setOnRightButtonClickListener(rightButtonListener);
    }

    @Override
    protected void onBindChannelListComponent(@NonNull ChannelListComponent channelListComponent, @NonNull ChannelListViewModel viewModel) {
        super.onBindChannelListComponent(channelListComponent, viewModel);
        channelListComponent.setOnItemClickListener(itemClickListener);
        channelListComponent.setOnItemLongClickListener(itemLongClickListener);
    }
}

List of methods to override

The following table shows a list of methods you must override to build a custom fragment.

v3
MethodDescription

onConfigureParams(ChannelListModule, Bundle)

Specifies the method to change the value of view properties using the parameters of the corresponding component.

onBeforeReady(ReadyStatus, ChannelListModule, ChannelListViewModel)

Specifies the method to set custom adapters in the component once a view has been created.

onBindHeaderComponent()

Specifies the method to bind event handlers to HeaderComponent of the channel list screen.

onBindChannelListComponent(ChannelListComponent, ChannelListViewModel)

Specifies the method to bind event handlers to ChannelListComponent of the channel list screen.

Set a custom fragment factory

After creating a custom fragment, follow the guide below on how to set a custom fragment factory. In UIKit v3, all activities use the UIKitFragmentFactory class to create a fragment. UIKitFragmentFactory is a global class that provides and manages all fragments used in Sendbird UIKit. While an activity creates the basic UI screen and allows the user to navigate between different screens, the fragment within the activity is what allows you to customize components and manage data.

If you wish to customize a fragment, you need to inherit the UIKitFragmentFactory class and override the method that creates the fragment. Then, you must return the customized fragment in order to apply the customization throughout the UIKit.

Note: If you're only using fragments to build a screen in UIKit instead of using an activity, you can skip the following steps.

  1. Inherit the UIKitFragmentFactory class to create a custom UIKitFragmentFactory.
  2. Override the method that creates the fragment you wish to customize and return the custom fragment. When returning the fragment, the Bundle class containing necessary data to build a view is also returned as parameters.
public class CustomFragmentFactory extends UIKitFragmentFactory {
    @Override
    public Fragment newChannelFragment(@NonNull String channelUrl, @NonNull Bundle args) {
        final CustomChannelFragment fragment = new CustomChannelFragment();
        args.putString("KEY_CHANNEL_URL", channelUrl);
        fragment.setArguments(args);
        return fragment;
    }
}
  1. Set the custom fragment factory to Application using SendbirdUIKit.setUIKitFragmentFactory(UIKitFragmentFactory).
public class MyApplication extends Application {
    @Override
    public void onCreate() {
        SendbirdUIKit.setUIKitFragmentFactory(new CustomFragmentFactory());
    }
}

List of methods to inherit

The following table shows a list of methods you must inherit to create a new fragment in each key function.

Key functionFragmentMethod

List channels

ChannelListFragment

Fragment newChannelListFragment(Bundle)

Chat in a group channel

ChannelFragment

Fragment newChannelFragment(String, Bundle)

Chat in an open channel

OpenChannelFragment

Fragment newOpenChannelFragment(String, Bundle)

Create a group channel

CreateChannelFragment

Fragment newCreateChannelFragment(CreatableChannelType, Bundle)

Configure group channel settings

ChannelSettingsFragment

Fragment newChannelSettingsFragment(String, Bundle)

Configure open channel settings

OpenChannelSettingsFragment

Fragment newOpenChannelSettingsFragment(String, Bundle)

Invite users

InviteUserFragment

Fragment newInviteUserFragment(String, Bundle)

Promote to operator

PromoteOperatorFragment

Fragment newPromoteOperatorFragment(String, Bundle)

List channel members

MemberListFragment

Fragment newMemberListFragment(String, Bundle)

List channel participants

ParticipantListFragment

Fragment newParticipantListFragment(String, Bundle)

List banned users

BannedUserListFragment

Fragment newBannedUserListFragment(String, Bundle)

List muted members

MutedMemberListFragment

Fragment newMutedMemberListFragment(String, Bundle)

List operators

OperatorListFragment

Fragment newOperatorListFragment(String, Bundle)

Moderate channels and members

ModerationFragment

Fragment newModerationFragment(String, Bundle)

Search messages

MessageSearchFragment

Fragment newMessageSearchFragment(String, Bundle)


API changes in each fragment

When migrating from v2 to v3, you should be aware of some changes to the setter methods in the builder class of each fragment. Refer to the codes below to see how to migrate the changed APIs for each fragment builder.

ChannelListFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new ChannelListFragment.Builder()
    .setHeaderLeftButtonListener(leftButtonListener)
    .setHeaderRightButtonListener(rightButtonListener)
    .setItemClickListener(itemClickListener)
    .setItemLongClickListener(itemLongClickListener)
    .build();
Fragment fragment = new ChannelListFragment.Builder()
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setOnHeaderRightButtonClickListener(rightButtonListener)
    .setOnItemClickListener(itemClickListener)
    .setOnItemLongClickListener(itemLongClickListener)
    .build();

ChannelFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new ChannelFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setHeaderRightButtonListener(rightButtonListener)
    .setInputLeftButtonListener(inputClickListener)
    .setOnProfileClickListener(profileClickListener)
    .build();
Fragment fragment = new ChannelFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setOnHeaderRightButtonClickListener(rightButtonListener)
    .setOnInputLeftButtonClickListener(inputClickListener)
    .setOnMessageProfileClickListener(profileClickListener)
    .build();

In the ChannelFragment.Builder class, the setListItemClickListener method and setListItemLongClickListener method have separated into individual event listener methods for each view item.

Fragment fragment = new ChannelFragment.Builder(channelUrl)
    .setListItemClickListener(identifiableItemClickListener)
    .setListItemLongClickListener(identifiableItemLongClickListener)
    .build();

// Or use the code below.

public class CustomChannelListFragment extends ChannelListFragment {
    @Override
    public void onIdentifiableItemClick(View view, String identifier, int position, BaseMessage message) {
        switch (identifier) {
            case StringSet.Chat:
                break;
            case StringSet.Profile:
                break;
            case StringSet.QuoteReply:
                break;
        }
    }
}
Fragment fragment = new ChannelFragment.Builder(channelUrl)
    .setOnMessageClickListener(messageClickListener)
    .setOnQuoteReplyMessageClickListener(quoteReplyMessageClickListener)
    .setOnMessageProfileclickListener(messageProfileClickListener)
    .setOnMessageLongClickListener(messageLongClickListener)
    .setOnQuoteReplyMessageLongClickListener(quoteReplyMessageLongClickListener)
    .setOnMessageProfileLongClickListener(messageProfileLongClickListener)
    .build();

// Or use the code below.

public class CustomChannelListFragment extends ChannelListFragment {
    @Override
    protected void onMessageClicked(@NonNull View view, int position, @NonNull BaseMessage message) {}

    @Override
    protected void onMessageProfileClicked(@NonNull View view, int position, @NonNull BaseMessage message) {}

    @Override
    protected void onQuoteReplyMessageClicked(@NonNull View view, int position, @NonNull BaseMessage message) {}
}

OpenChannelFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new OpenChannelFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setHeaderRightButtonListener(rightButtonListener)
    .setInputLeftButtonListener(inputClickListener)
    .setOnProfileClickListener(profileClickListener)
    .build();
 Fragment fragment = new OpenChannelFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setOnHeaderRightButtonClickListener(rightButtonListener)
    .setOnInputLeftButtonClickListener(inputClickListener)
    .setOnMessageProfileClickListener(profileClickListener)
    .build();

In the OpenChannelFragment.Builder class, the setListItemClickListener method and setListItemLongClickListener method have now been divided into individual event listener methods for each view item.

Fragment fragment = new OpenChannelFragment.Builder(channelUrl)
    .setListItemClickListener(identifiableItemClickListener)
    .setListItemLongClickListener(identifiableItemLongClickListener)
    .build();

// Or use the code below.

public class CustomOpenChannelListFragment extends OpenChannelListFragment {
    @Override
    public void onIdentifiableItemClick(View view, String identifier, int position, BaseMessage message) {
        switch (identifier) {
            case StringSet.Chat:
                break;
            case StringSet.Profile:
                break;
        }
    }
}
Fragment fragment = new OpenChannelFragment.Builder(channelUrl)
    .setOnMessageClickListener(messageClickListener)
    .setOnMessageProfileClickListener(messageProfileClickListener)
    .setOnMessageLongClickListener(messageLongClickListener)
    .setOnMessageProfileLongClickListener(messageProfileLongClickListener)
    .build();

// Or use the code below.

public class CustomOpenChannelListFragment extends OpenChannelListFragment {
    @Override
    protected void onMessageClicked(@NonNull View view, int position, @NonNull BaseMessage message) {}

    @Override
    protected void onMessageProfileClicked(@NonNull View view, int position, @NonNull BaseMessage message) {}

    @Override
    protected void onQuoteReplyMessageClicked(@NonNull View view, int position, @NonNull BaseMessage message) {}
}

CreateChannelFragment.Builder

The CreateableChannelType property has been changed to CreatableChannelType and the following methods have also changed names in v3.

Fragment fragment = new CreateChannelFragment.Builder(CreateableChannelType.Normal)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setCustomUserListQueryHandler(customQueryHandler)
    .build();
Fragment fragment = new CreateChannelFragment.Builder(CreatableChannelType.Normal)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setCustomPagedQueryHandler(customQueryHandler)
    .build();

ChannelSettingsFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new ChannelSettingsFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setMemberSettingClickListener(memberSettingClickListener)
    .setOnSettingMenuClickListener(menuClickListener)
    .build();
Fragment fragment = new ChannelSettingsFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setOnMenuClickListener(menuItemClickListener)
    .build();

OpenChannelSettingsFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new OpenChannelSettingsFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setMemberSettingClickListener(memberSettingClickListener)
    .setOnSettingMenuClickListener(menuClickListener)
    .build();
Fragment fragment = new OpenChannelSettingsFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setOnMenuClickListener(menuItemClickListener)
    .build();

InviteUserFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new InviteUserFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setUserListAdapter(userListAdapter)
    .setCustomUserListQueryHandler(userListQueryHandler)
    .build();
Fragment fragment = new InviteUserFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setInviteUserListAdapter(inviteUserListAdapter)
    .setOnCustomPagedQueryHandler(customPagedQueryHandler)
    .build();

PromoteOperatorFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new PromoteOperatorFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setUserListAdapter(userListAdapter)
    .setCustomUserListQueryHandler(userListQueryHandler)
    .build();
Fragment fragment = new PromoteOperatorFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setPromoteOperatorListAdapter(promoteOperatorListAdapter)
    .setOnCustomPagedQueryHandler(customPagedQueryHandler)
    .build();

MemberListFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new MemberListFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setHeaderRightButtonListener(rightButtonListener)
    .setItemClickListener(itemClickListener)
    .setItemLongClickListener(itemLongClickListener)
    .setActionItemClickListener(actionItemClickListener)
    .build();
Fragment fragment = new MemberListFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setOnHeaderRightButtonClickListener(rightButtonListener)
    .setOnItemClickListener(itemClickListener)
    .setOnItemLongClickListener(itemLongClickListener)
    .setOnActionItemClickListener(actionItemClickListener)
    .build();

ParticipantListFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new ParticipantListFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setHeaderRightButtonListener(rightButtonListener)
    .setItemClickListener(itemClickListener)
    .setItemLongClickListener(itemLongClickListener)
    .setActionItemClickListener(actionItemClickListener)
    .setUserListAdapter(userListAdapter)
    .build();
Fragment fragment = new ParticipantListFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setOnHeaderRightButtonClickListener(rightButtonListener)
    .setOnItemClickListener(itemClickListener)
    .setOnItemLongClickListener(itemLongClickListener)
    .setOnActionItemClickListener(actionItemClickListener)
    .setParticipantListAdapter(participantListAdapter)
    .build();

MutedMemberListFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new MutedMemberListFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setHeaderRightButtonListener(rightButtonListener)
    .setItemClickListener(itemClickListener)
    .setItemLongClickListener(itemLongClickListener)
    .setActionItemClickListener(actionItemClickListener)
    .setMemberListAdapter(memberListAdapter)
    .build();
Fragment fragment = new MutedMemberListFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setOnHeaderRightButtonClickListener(rightButtonListener)
    .setOnItemClickListener(itemClickListener)
    .setOnItemLongClickListener(itemLongClickListener)
    .setOnActionItemClickListener(actionItemClickListener)
    .setMutedMemberListAdapter(mutedMemberListAdapter)
    .build();

OperatorListFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new OperatorListFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .setHeaderRightButtonListener(rightButtonListener)
    .setItemClickListener(itemClickListener)
    .setItemLongClickListener(itemLongClickListener)
    .setActionItemClickListener(actionItemClickListener)
    .setUserListAdapter(userListAdapter)
    .build();
Fragment fragment = new OperatorListFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .setOnHeaderRightButtonClickListener(rightButtonListener)
    .setOnItemClickListener(itemClickListener)
    .setOnItemLongClickListener(itemLongClickListener)
    .setOnActionItemClickListener(actionItemClickListener)
    .setOperatorListAdapter(operatorListAdapter)
    .build();

ModerationFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new ModerationFragment.Builder(channelUrl)
    .setHeaderLeftButtonListener(leftButtonListener)
    .build();
Fragment fragment = new ModerationFragment.Builder(channelUrl)
    .setOnHeaderLeftButtonClickListener(leftButtonListener)
    .build();

MessageSearchFragment.Builder

The following methods have changed names in v3.

Fragment fragment = new MessageSearchFragment.Builder(channelUrl)
    .setItemClickListener(itemClickListener)
    .build();
Fragment fragment = new MessageSearchFragment.Builder(channelUrl)
    .setOnItemClickListener(itemClickListener)
    .build();