This document describes how to integrate Kakao Talk Channel APIs into your service with the Kakao SDK for Flutter ("Flutter SDK").

Follow Kakao Talk Channel and Add Kakao Talk Channel are available. Refer to Add Kakao Talk Channel and decide what to use. Follow Kakao Talk Channel is recommended because of the easy implementation.

To use Follow Kakao Talk channel, set a custom URL scheme in AndroidManifest.xml. The custom URL scheme is used to launch the service app after following Kakao Talk channel. Refer to the sample below.

<!-- Custom URL scheme setting for Android device in the Flutter project -->
<activity
    android:name="com.kakao.sdk.flutter.auth.AppsHandlerActivity"
    android:exported="true">
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <!-- Redirect URI: "kakao${NATIVE_APP_KEY}://channel" -->
        <data android:scheme="kakao${YOUR_NATIVE_APP_KEY}" android:host="channel"/>
    </intent-filter>
    </intent-filter>
</activity>

Requests adding Kakao Talk Channel to the user.

Displays a screen for adding Kakao Talk Channel and returns the result in the response.

Request followChannel() in TalkApi. Kakao Talk Channel profile ID is required. Refer to Services using Kakao Login and Services not using Kakao Login for the request process.

If the request is successful, FollowChannelResult in the response includes the Kakao Talk Channel profile ID and the result. If the request fails, refer to Trouble shooting to figure out the reason.

try {
  // Follow Kakao Talk Channel
  await TalkApi.instance.followChannel("${CHANNEL_PUBLIC_ID}");
  print("Success")
  // Success
} catch(error) {
  print("Fail $error");
  // Fail
}

Provides a bridge page that lets users go to a Kakao Talk Channel and add it as a friend.

To use this feature, users must be in a logged-in state. If users click [Add Channel] in a logged-out state, direct them to the login page to log in.

Call addChannel() in TalkApi. Pass the profile ID of the Kakao Talk Channel.

This API does not inform whether the user adds the Kakao Talk Channel. To check the added status, use the Check Kakao Talk Channel relationship API that shows the relationship between a user and a Kakao Talk Channel.

try {
  // Add Kakao Talk Channel
  await TalkApi.instance.addChannel(channelId);
} catch(error) {
  print('Failed to add channel $error');
}

To send the user to a bridge page before launching Kakao Talk, use addChannelUrl(). Pass the profile ID of the Kakao Talk Channel. To open the specified Kakao Talk Channel via a default web browser, call the launchBrowser() method.

// Add URL of Kakao Talk Channel
Uri url = await TalkApi.instance.addChannelUrl('_ABcdE');

// Open URL via a device browser
try {
  await launchBrowser(url);
} catch (error) {
  print('Any web browser is not installed: Install a web browser. $error');
}

Provides a bridge page to start a chat with the Kakao Talk Channel on Kakao Talk.

Call chatChannel() in TalkApi. Pass the profile ID of the Kakao Talk Channel.

This API does not inform you whether the user has successfully started the chat.

try {
  // Start Kakao Talk Channel chat
  await TalkApi.instance.chatChannel(channelId);
} catch(error) {
  print('Failed to start a chat $error');
}

To send the user to a bridge page before launching Kakao Talk, use addChannelUrl(). Pass the profile ID of the Kakao Talk Channel. To open the specified Kakao Talk Channel via a default web browser, call launchBrowser() method.

// Kakao Talk Channel chat URL
Uri url = await TalkApi.instance.chatChannelUrl('_ABcdE');

// Open URL via a device browser
try {
  await launchBrowser(url);
} catch (error) {
  print('Any web browser is not installed: Install a web browser. $error');
}

Checks whether a specific user has added or blocked your Kakao Talk Channel connected to your service app.

Call the channels() method defined in the TalkApi class.

Make sure that this API only informs the relationship between the user and the Kakao Talk Channel connected to the app that made a request. Thus, you cannot get all Kakao Talk Channels' information that the user has added but the channels related to your service only.

If the request is successful, channels() returns the Channels object.

// Check Kakao Talk Channel relationship
try {
  Channels relations = await TalkApi.instance.channels();
  print('Succeeded in checking channel relationship.\n${relations.channels}');
} catch (error) {
  print('Failed to check channel relationship. $error');
}