kakao developers

Android

This document describes how to integrate Kakao Login APIs into your service with the Kakao SDK for Android.

To learn about each API in detail, refer to Concepts.

For a Kakao Login button, you can download the resources provided by Kakao or customize buttons according to your service user interface by referring to the Design Guide.

Kakao Login button resource downloadoutlinkDesign Guide

Before you begin

Before using Kakao Login APIs with the Android SDK,

1. Register the Android platform.
2. Add modules.
3. Set Redirect URI.

Add modules

To use the Kakao Login feature, you need to add the v2-user module for Kakao Login and user management in the module-level build.gradle file by referring to Add modules.

Set Redirect URI

To implement 'Kakao Login' feature, your app must be able to receive the authorization code through redirection. To make this state, add AuthCodeHandlerActivity in AndroidManifest.xml and specify redirect_uri by adding host and scheme data in <intent-filter>.

<activity android:name="com.kakao.sdk.auth.AuthCodeHandlerActivity"
          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${YOUR_NATIVE_APP_KEY}://oauth" -->
        <data android:scheme="kakao${YOUR_NATIVE_APP_KEY}" android:host="oauth" />
    </intent-filter>
</activity>

When the authorization server sends an authorization code to the specified redirect_uri in kakao${YOUR_NATIVE_APP_KEY}://oauth?code=${AUTHORIZATION_CODE} format, the SDK receives the authorization code and requests an access token with the passed authorization code. Refer to Concepts to see the login process.

If your app is targeting Android 12 or higher, you must declare android:exported and set it to true. Refer to Behavior changes: Apps targeting Android 12.

Login

This API enables users to log in through Kakao Talk or their Kakao Account information.

If Kakao Talk is not installed or a browser is not available on a user's device, the ClientErrorCause.NotSupported error occurs. To see more about the error cases that you may encounter during the login process, refer to Troubleshooting > Android. You can also refer to Kakao Login Sample.

Login with Kakao Talk

Basic information

For 'Login with Kakao Talk', call the loginWithKakaoTalk() method that runs Kakao Talk and prompts the Consent screen that asks consent.

Parameter

Sample

// Login with Kakao Talk
UserApiClient.instance.loginWithKakaoTalk(context) { token, error ->
    if (error != null) {
        Log.e(TAG, "Login failed.", error)
    }
    else if (token != null) {
        Log.i(TAG, "Login succeeded.${token.accessToken}")
    }
}

var disposables = CompositeDisposable()

// Login with Kakao Talk
UserApiClient.rx.loginWithKakaoTalk(context)
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ token ->
        Log.i(TAG, "Login succeeded.${token.accessToken}")
    }, { error ->
        Log.e(TAG, "Login failed.", error)
    })
    .addTo(disposables)

When a user consents, Kakao identifies the user with the user's Kakao Account information linked to Kakao Talk, and then issues tokens. The Android SDK provides the issued tokens through the OAuthToken object.

OAuthToken

The issued tokens are stored through the TokenManagerProvider class. The stored tokens are automatically added to the authorization header when calling the token-based APIs.

Login with Kakao Account

Basic information

For 'Login with Kakao Account', you must set Redirect URI in advance and call the loginWithKakaoAccount() method that opens a default web browser and prompts the Consent screen that asks consent.

Parameter

Sample

//  Login with Kakao Account
UserApiClient.instance.loginWithKakaoAccount(context) { token, error ->
    if (error != null) {
        Log.e(TAG, "Login failed.", error)
    }
    else if (token != null) {
        Log.i(TAG, "Login succeeded.${token.accessToken}")
    }
}

var disposables = CompositeDisposable()

//  Login with Kakao Account
UserApiClient.rx.loginWithKakaoAccount(context)
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ token ->
        Log.i(TAG, "Login succeeded.${token.accessToken}")
    }, { error ->
        Log.e(TAG, "Login failed.", error)
    })
    .addTo(disposables)

When a user consents, Kakao identifies the user through the user's Kakao Account cookie stored on the default web browser and then issues tokens through the OAuthToken class.

Advanced: Request reauthentication

You can request reauthentication regardless of a user's login status to enhance security. Set prompts to Prompt.LOGIN, and pass it along with context. Then, the login screen is prompted even though a user has already been logged in on the same web browser on the device.

UserApiClient.instance.loginWithKakaoAccount(context, prompts = listOf(Prompt.LOGIN)) { token, error ->
    if (error != null) {
        Log.e(TAG, "Login failed.", error)
    }
    else if (token != null) {
        Log.i(TAG, "Login succeeded.${token.accessToken}")
    }
}

var disposables = CompositeDisposable()

UserApiClient.rx.loginWithKakaoAccount(context, prompts = listOf(Prompt.LOGIN))
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ token ->
        Log.i(TAG, "Login succeeded.${token.accessToken}")
    }, { error ->
        Log.e(TAG, "Login failed.", error)
    })
    .addTo(disposables)

Advanced: Log in after signing up for Kakao Account

You can request to prompt the Kakao Account sign-up page before Kakao Login. Set prompts to Prompt.CREATE, and pass it along with context. The Kakao Login consent screen will be present after signing up for Kakao Account.

UserApiClient.instance.loginWithKakaoAccount(context, prompts = listOf(Prompt.CREATE)) { token, error ->
    if (error != null) {
        Log.e(TAG, "Login failed.", error)
    }
    else if (token != null) {
        Log.i(TAG, "Login succeeded.${token.accessToken}")
    }
}

var disposables = CompositeDisposable()

UserApiClient.rx.loginWithKakaoAccount(context, prompts = listOf(Prompt.CREATE))
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ token ->
        Log.i(TAG, "Login succeeded.${token.accessToken}")
    }, { error ->
        Log.e(TAG, "Login failed.", error)
    })
    .addTo(disposables)

Kakao Login Sample

You can implement Kakao Login by combining 'Kakao Login with Kakao Talk' and 'Kakao Login with Kakao Account' together, as exemplified below. You can also use the isKakaoTalkLoginAvailable() method to check if Kakao Talk has been installed on a user's device so that the user can log in with Kakao Talk. The code snippet below shows the logic of Kakao Login depending on whether Kakao Talk is installed and a user's action.

After a user initially installs Kakao Talk and does not complete app permission for Kakao Talk, the user can cancel to log in with Kakao Talk. In this case, ClientErrorCause.Cancelled error occurs. Thus, you need to implement the subsequent process after the user cancels the login, such as redirecting the user to the main page or going back to the previous page by referring to this code snippet.

// Login common callback 
val callback: (OAuthToken?, Throwable?) -> Unit = { token, error ->
    if (error != null) {
        Log.e(TAG, "Login failed.", error)
    } else if (token != null) {
        Log.i(TAG, "Login succeeded. ${token.accessToken}")
    }
}

// If Kakao Talk is installed on user's device, proceed to log in with Kakao Talk. Otherwise, implement to log in with Kakao Account.
if (UserApiClient.instance.isKakaoTalkLoginAvailable(context)) {
    UserApiClient.instance.loginWithKakaoTalk(context) { token, error ->
        if (error != null) {
            Log.e(TAG, "Login failed.", error)

            // After installing Kakao Talk, if a user does not complete app permission and cancels Login with Kakao Talk, skip to log in with Kakao Account, considering that the user does not want to log in. 
            // You could implement other actions such as going back to the previous page.
            if (error is ClientError && error.reason == ClientErrorCause.Cancelled) {
                return@loginWithKakaoTalk
            }

            // If a user is not logged into Kakao Talk after installing Kakao Talk and allowing app permission, make the user log in with Kakao Account.
            UserApiClient.instance.loginWithKakaoAccount(context, callback = callback)
        } else if (token != null) {
            Log.i(TAG, "Login succeeded. ${token.accessToken}")
        }
    }
} else {
    UserApiClient.instance.loginWithKakaoAccount(context, callback = callback)
}

var disposables = CompositeDisposable()

// If Kakao Talk has been installed, log in with Kakao Talk. Otherwise, log in with Kakao Account.
if (UserApiClient.instance.isKakaoTalkLoginAvailable(context)) {
    UserApiClient.rx.loginWithKakaoTalk(context)
        .observeOn(AndroidSchedulers.mainThread())
        .onErrorResumeNext { error ->
            // After installing Kakao Talk, if a user does not complete app permission and cancels Login with Kakao Talk, skip to log in with Kakao Account, considering that the user does not want to log in.
            // You could implement other actions such as going back to the previous page.
            if (error is ClientError && error.reason == ClientErrorCause.Cancelled) {
                Single.error(error)
            } else {
                // If a user is not logged into Kakao Talk after installing Kakao Talk and allowing app permission, make the user log in with Kakao Account.
                UserApiClient.rx.loginWithKakaoAccount(context)
            }
        }.observeOn(AndroidSchedulers.mainThread())
        .subscribe({ token ->
            Log.i(TAG, "Login succeeded. ${token.accessToken}")
        }, { error ->
            Log.e(TAG, "Login failed.", error)
        }).addTo(disposables)
} else {
    UserApiClient.rx.loginWithKakaoAccount(context)
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe({ token ->
            Log.i(TAG, "Login succeeded. ${token.accessToken}")
        }, { error ->
            Log.e(TAG, "Login failed.", error)
        }).addTo(disposables)
}

Check token presence

Basic information

To check if a user has obtained an access token through Kakao Login, call the hasToken() method in AuthApiClient. This API returns the presence of an access token or refresh token as a boolean type. However, note that the return value true does not guarantee that the user is in a logged-in state.

Sample

if (AuthApiClient.instance.hasToken()) {
    UserApiClient.instance.accessTokenInfo { _, error ->
        if (error != null) {
            if (error is KakaoSdkError && error.isInvalidTokenError() == true) {
                //Login is required.
            }
            else {
                //Handle other errors.
            }
        }
        else {
            //Succeeded in validating token (Token is refreshed if needed).
        }
    }
}
else {
    //Login is required.
}

var disposables = CompositeDisposable()

if (AuthApiClient.instance.hasToken()) {
    UserApiClient.rx.accessTokenInfo()
            .subscribe({ tokenInfo ->
                //Succeeded in validating token (Token is refreshed if needed).

            }, { error ->
                if (error != null) {
                    if (error is KakaoSdkError && error.isInvalidTokenError() == true) {
                        //Login is required.
                    }
                    else {
                        //Handle other errors.
                    }
                }
                else {
                    //Succeeded in validating token (Token is refreshed if needed).
                }

            })
            .addTo(disposables)
}
else {
    //Login is required.
}

If the value false is returned, it means that tokens do not exist. In this case, implement a process for a user to log in to issue tokens. On the other hand, if the return value is true, you can validate the access token that the user has through the accessTokenInfo() method in UserApiClient, and then proceed as follows depending on the request result:

• If the request is successful, the access token information is returned,
  • Access token is valid, which means the user does not need to log in.
  • You can call the Kakao APIs with the access token.
• If an error occurs,
  • Access and refresh tokens are invalid, which means the user needs to log in.
  • You need to handle errors by referring to API Reference.

Logout

Basic information

The Logout API deletes the access and refresh token issued through the login process to have a user log out. Call the logout() method in the UserApiClient class.

Regardless of the result of the logout request, the Android SDK deletes the access and refresh tokens and has the login session end.

Sample

// Logout
UserApiClient.instance.logout { error ->
    if (error != null) {
        Log.e(TAG, "Logout fail. Tokens are deleted from SDK", error)
    }
    else {
        Log.i(TAG, "Logout success. Tokens are deleted from SDK")
    }
}

var disposables = CompositeDisposable()

// Logout
UserApiClient.rx.logout()
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({
        Log.i(TAG, "Logout success. Tokens are deleted from SDK.")
    }, { error ->
        Log.e(TAG, "Logout fail. Tokens are deleted from SDK.", error)
    }).addTo(disposables)

Unlink

Basic information

The Unlink API unlinks a user's Kakao Account from a service app. Call the unlink() method in the UserApiClient class.

If the request is successful, the Android SDK deletes the access and refresh tokens. As the issued tokens are deleted, the session between an app and a user is disconnected, and the user is logged out and unlinked from your app.

Sample

// Unlink
UserApiClient.instance.unlink { error ->
    if (error != null) {
        Log.e(TAG, "Unlink fail", error)
    }
    else {
        Log.i(TAG, "Unlink success. Tokens are deleted from SDK.")
    }
}

var disposables = CompositeDisposable()

// Unlink
UserApiClient.rx.unlink()
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({
        Log.i(TAG, "Unlink success. Tokens are deleted from SDK.")
    }, { error ->
        Log.e(TAG, "Unlink fail", error)
    }).addTo(disposables)

Retrieve token information

Basic information

You can simply check the validity of the access token and refresh token, instead of requesting user information. Call the accessTokenInfo() method in the UserApiClient.

Parameter

Sample

// Retrieving token information
UserApiClient.instance.accessTokenInfo { tokenInfo, error ->
    if (error != null) {
        Log.e(TAG, "Failed to retrieve token information.", error)
    }
    else if (tokenInfo != null) {
        Log.i(TAG, "Retrieving token information success" +
                "\nService user ID: ${tokenInfo.id}" +
                "\nValidity period: ${tokenInfo.expiresIn} seconds")
    }
}

var disposables = CompositeDisposable()

// Retrieving token information
UserApiClient.rx.accessTokenInfo()
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ tokenInfo ->
        Log.i(TAG, "Retrieving token information success" +
                "\nService user ID: ${tokenInfo.id}" +
                "\nValidity period: ${tokenInfo.expiresIn} seconds")
    }, { error ->
        Log.e(TAG, "Failed to retrieve token information.", error)
    })
    .addTo(disposables)

AccessTokenInfo

Retrieve user information

Basic information

To retrieve the information of the user who is currently logged in, call the me() method in the UserApiClient class.

Sample

Here is an example of retrieving user information — Service user ID, email, nickname and profile thumbnail image URI.

// Retrieving user information (Default) 
UserApiClient.instance.me { user, error ->
    if (error != null) {
        Log.e(TAG, "Retrieving user information fails", error)
    }
    else if (user != null) {
        Log.i(TAG, "Retrieving user information succeeds" +
                "\nService user ID: ${user.id}" +
                "\nEmail: ${user.kakaoAccount?.email}" +
                "\nNickname: ${user.kakaoAccount?.profile?.nickname}" +
                "\nProfile Thumbnail Image URI: ${user.kakaoAccount?.profile?.thumbnailImageUrl}")
    }
}

var disposables = CompositeDisposable()

// Retrieving user information (Default) 
UserApiClient.rx.me()
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ user ->
        Log.i(TAG, "Retrieving user information succeeds" +
                "\nService user ID: ${user.id}" +
                "\nEmail: ${user.kakaoAccount?.email}" +
                "\nNickname: ${user.kakaoAccount?.profile?.nickname}" +
                "\nProfile Thumbnail Image URI: ${user.kakaoAccount?.profile?.thumbnailImageUrl}")
    }, { error ->
        Log.e(TAG, "Retrieving user information fails", error)
    })
    .addTo(disposables)

The user information in response to this request is passed through the User class defined in the com.kakao.sdk.user.model package. For example, you can access user.id to retrieve Service user ID, user.kakaoAccount.profile for Kakao Account's profile information, user.kakaoAccount.email for email.

User

Ensure that you need to handle exceptions for the following cases in which you cannot get the user information:

• If you do not enable the consent item for some user information.
• If a user has not agreed to provide the user information to the third-party service.
• If a user has not provided the user information to Kakao.

Retrieve shipping address

Basic information

This API enables you to retrieve shipping addresses saved in user's Kakao Account.

To retrieve shipping address,

• You must enable the 'Shipping information (shipping_address)' scope.
• Users must consent to the scope. If a user does not consent, you cannot get the user data even though you enabled the scope. If Kakao does not retain a user's shipping address, Kakao cannot provide the information to your service even when a user consents.

The shipping_address scope is inactivated by default. To set the scope to 'Optional consent', connect your app to a Biz Channel. If your service must get users' shipping addresses, set the scope to 'Required consent' by going through the Review for Provision of Personal Information provided by Kakao Sync and use the Provision after collecting information option.

To retrieve a user's shipping addresses, call the shippingAddresses() method defined in the UserApiClient class. You can also pass the following parameters.

Parameter

Sample

// Retrieve shipping address with requesting additional consent
UserApiClient.instance.shippingAddresses { userShippingAddresses, error ->
    if (error != null) {
        Log.e(TAG, "Failed to retrieve shipping address", error)
    }
    else if (userShippingAddresses != null) {
        if (userShippingAddresses.shippingAddresses != null) {
            Log.i(TAG, "Succeeded in retrieving shipping addresses" +
                    "\nService user ID: ${userShippingAddresses.userId}" +
                    "\nShipping addresses: \n${userShippingAddresses.shippingAddresses?.joinToString("\n")}")
        }
        else if (userShippingAddresses.needsAgreement == false) {
            Log.e(TAG, "User account does not have a shipping address. If required, select 'Provision after collecting information' option in [My Application] > [Kakao Login] > [Consent items].")
        }
        else if (userShippingAddresses.needsAgreement == true) {
            Log.d(TAG, "You must obtain consent to providing shipping address from a user.")

            val scopes = listOf("shipping_address")

            // Request consent to providing shipping address 
            UserApiClient.instance.loginWithNewScopes(context, scopes) { token, error ->
                if (error != null) {
                    Log.e(TAG, "Failed to get consent to providing shipping address", error)
                }
                else if (token != null) {
                    Log.d(TAG, "allowed scopes: ${token.scopes}")

                    // Retry the request retrieving shipping address
                    UserApiClient.instance.shippingAddresses { userShippingAddresses, error ->
                        if (error != null) {
                            Log.e(TAG, "Failed to retrieve shipping address", error)
                        }
                        else if (userShippingAddresses != null) {
                            Log.i(TAG, "Succeeded in retrieving shipping addresses" +
                                    "\nService user ID: ${userShippingAddresses.userId}" +
                                    "\nShipping addresses: \n${userShippingAddresses.shippingAddresses?.joinToString("\n")}")
                        }
                    }
                }
            }
        }
    }
}

var disposables = CompositeDisposable()

// Retrieve shipping address with requesting additional consent
UserApiClient.rx.shippingAddresses()
    .flatMap { userShippingAddresses ->
        if (userShippingAddresses.needsAgreement == true) {
            Log.d(TAG, "You must obtain consent to providing shipping address from a user.")

            // If InsufficientScope error occurs
            Single.error(ApiError.fromScopes(listOf("shipping_address")))
        }
        else {
            Single.just(userShippingAddresses)
        }
    }
    .retryWhen(
        //  Retry the request the Retrieving shipping address API after requesting additional consent to resolve the InsufficientScope error.
        RxAuthOperations.instance.incrementalAuthorizationRequired(context)
    )
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ userShippingAddresses ->
        if (userShippingAddresses.shippingAddresses != null) {
            Log.i(TAG, "Succeeded in retrieving shipping addresses" +
                    "\nService user ID: ${userShippingAddresses.userId}" +
                    "\nShipping addresses: \n${userShippingAddresses.shippingAddresses?.joinToString("\n")}")
        } else {
            Log.e(TAG, "User account does not have a shipping address. If required, select 'Provision after collecting information' option in [My Application] > [Kakao Login] > [Consent items].")
        }
    }, { error ->
        Log.e(TAG, "Failed to retrieve shipping address", error)
    })
    .addTo(disposables)

shippingAddresses() returns the UserShippingAddresses object.

UserShippingAddresses

ShippingAddress

Store user information

Basic information

You can store or update additional user information into the user property keys that you designated in [My Application] > [User Properties].

Call the updateProfile() method in the UserApiClient class. You must pass the custom property keys and values that you want to upadate through properties in a key-value pair using mapOf. For example, if you want to update a user's clothing size, set properties to mapOf("clothing_size" to "small").

Parameter

Sample

// Storing user information

// Properties to be updated
val properties = mapOf("${CUSTOM_PROPERTY_KEY}" to "${CUSTOM_PROPERTY_VALUE}")

UserApiClient.instance.updateProfile(properties) { error ->
    if (error != null) {
        Log.e(TAG, "Storing user information fails", error)
    }
    else {
        Log.i(TAG, "Storing user information succeeds")
    }
}

var disposables = CompositeDisposable()

// Storing user information

// Properties to be updated
val properties = mapOf("${CUSTOM_PROPERTY_KEY}" to "${CUSTOM_PROPERTY_VALUE}")

UserApiClient.rx.updateProfile(properties)
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({
        Log.i(TAG, "Storing user information succeeds")
    }, { error ->
        Log.e(TAG, "Storing user information fails", error)
    })

Request additional consent

Basic information

You can request consent to access permission or specific personal information if the user has not agreed when the user logged in with Kakao. Before using this API, read Concepts > Request additional consent thoroughly for a better understanding.

Call the loginWithNewScopes() method in the UserApiClient class. Pass the scopes of user information you want to request additional consent as a list of strings.

loginWithNewScopes() presents the Consent screen asking for consent to the requested scope. When a user chooses to provide the scope and selects [Accept and Continue] on the Consent screen, new tokens are issued, and the scope information is updated in the OAuthToken class.

Parameter

Sample

Here is an example of checking which scopes are required to get consent with the me() method and requesting additional consent by passing scopes when calling loginWithNewScopes.

// Retrieving user information (additional consent)

// You can request additional consent when the user attempts to use a service 
// that requires specific user information and then obtain the user information as follows. 

//  * CAUTION: Consider the case that users refuse to consent to 'Optional consent' item 
// to prevent a problem with the use of the service. 

// Example that checks available scopes and requests consent to all available scopes.
UserApiClient.instance.me { user, error ->
    if (error != null) {
        Log.e(TAG, "Failed to retrieve user information.", error)
    }
    else if (user != null) {
        var scopes = mutableListOf<String>()

        if (user.kakaoAccount?.emailNeedsAgreement == true) { scopes.add("account_email") }
        if (user.kakaoAccount?.birthdayNeedsAgreement == true) { scopes.add("birthday") }
        if (user.kakaoAccount?.birthyearNeedsAgreement == true) { scopes.add("birthyear") }
        if (user.kakaoAccount?.genderNeedsAgreement == true) { scopes.add("gender") }
        if (user.kakaoAccount?.phoneNumberNeedsAgreement == true) { scopes.add("phone_number") }
        if (user.kakaoAccount?.profileNeedsAgreement == true) { scopes.add("profile") }
        if (user.kakaoAccount?.ageRangeNeedsAgreement == true) { scopes.add("age_range") }
        if (user.kakaoAccount?.ciNeedsAgreement == true) { scopes.add("account_ci") }

        if (scopes.count() > 0) {
            Log.d(TAG, "Need to obtain consent from user.")

            // If OpenID Connect (OIDC) is enabled,
            // - When "openid" is added to `scopes`, OIDC is applied.
            // - When "openid" is not added to `scopes`, OAuth 2.0 is applied. 
                                                
            // To use OIDC, add "openid" to `scopes`.
            // scopes.add("openid")

            UserApiClient.instance.loginWithNewScopes(context, scopes) { token, error ->
                if (error != null) {
                    Log.e(TAG, "Failed to obtain additional consent.", error)
                } else {
                    Log.d(TAG, "allowed scopes: ${token!!.scopes}")

                    // Re-request user information
                    UserApiClient.instance.me { user, error ->
                        if (error != null) {
                            Log.e(TAG, "Failed to retrieve user information.", error)
                        }
                        else if (user != null) {
                            Log.i(TAG, "Succeeded in retrieving user information.")
                        }
                    }
                }
            }
        }
    }
}

var disposables = CompositeDisposable()

// Retrieving user information (additional consent)

// You can request additional consent when the user attempts to use a service 
// that requires specific user information and then obtain the user information as follows. 


//  * CAUTION: Consider the case that users refuse to consent to 'Optional consent' item 
// to prevent a problem with the use of the service. 

// Example that checks available scopes and requests consent to all available scopes.
UserApiClient.rx.me()
    .flatMap { user ->

        var scopes = mutableListOf<String>()

        if (user.kakaoAccount?.emailNeedsAgreement == true) { scopes.add("account_email") }
        if (user.kakaoAccount?.birthdayNeedsAgreement == true) { scopes.add("birthday") }
        if (user.kakaoAccount?.birthyearNeedsAgreement == true) { scopes.add("birthyear") }
        if (user.kakaoAccount?.genderNeedsAgreement == true) { scopes.add("gender") }
        if (user.kakaoAccount?.phoneNumberNeedsAgreement == true) { scopes.add("phone_number") }
        if (user.kakaoAccount?.profileNeedsAgreement == true) { scopes.add("profile") }
        if (user.kakaoAccount?.ageRangeNeedsAgreement == true) { scopes.add("age_range") }
        if (user.kakaoAccount?.ciNeedsAgreement == true) { scopes.add("account_ci") }

        if (scopes.count() > 0) {
            Log.d(TAG, "Need to obtain consent from user.")

            // If OpenID Connect (OIDC) is enabled,
            // - When "openid" is added to `scopes`, OIDC is applied.
            // - When "openid" is not added to `scopes`, OAuth 2.0 is applied. 
                                                
            // To use OIDC, add "openid" to `scopes`.
            // scopes.add("openid")

            // InsufficientScope  error occurs
            Single.error(ApiError.fromScopes(scopes))
        }
        else {
            Single.just(user)
        }
    }
    .retryWhen(
        // Request additional consent for InsufficientScope.
        RxAuthOperations.instance.incrementalAuthorizationRequired(context)
    )
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ user ->
        Log.i(TAG, "Succeeded in retrieving user information.")
    }, { error ->
        Log.e(TAG, "Failed to retrieve user information.", error)
    })
    .addTo(disposables)

If the request is successful, the newly issued tokens are returned through the OAuthToken object.

Retrieve consent details

Basic information

This API enables you to retrieve the detailed information of the scopes (consent items) that a user has agreed to. You can check all scopes set in [My Application] > [Kakao Login] > [Consent Items] and the details of the scopes. If a user has consented to the scope before, the scope is included in the response even though your app is currently not using the scope.

Call the scopes() method in the UserApiClient class.

Parameter

Sample

UserApiClient.instance.scopes { scopeInfo, error->
    if (error != null) {
        Log.e(TAG, "Failed to retrieve consent details.", error)
    }else if (scopeInfo != null) {
        Log.i(TAG, "Succeeded in retrieving consent details succeeds.\n Scopes being used or agreed: $scopeInfo")
    }
}

var disposables = CompositeDisposable()

UserApiClient.rx.scopes()
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ scopeInfo: ScopeInfo?->
        Log.i(TAG, "Succeeded in retrieving consent details succeeds.\n Scopes being used or agreed: $scopeInfo")
    }, { error: Throwable? ->
        Log.e(TAG, "Failed to retrieve consent details.", error)
    }).addTo(disposables)

You can also retrieve the information of specific scopes by passing scope IDs. In this case, the response includes only the detailed information of the specified scopes if the request is successful.

// List of the scope IDs that you want to retrieve
val scopes = mutableListOf("account_email", "friends")

UserApiClient.instance.scopes(scopes) { scopeInfo, error->
    if (error != null) {
        Log.e(TAG, "Failed to retrieve consent details.", error)
    }else if (scopeInfo != null) {
        Log.i(TAG, "Succeeded in retrieving consent details succeeds.\n Scopes being used or agreed: $scopeInfo")
    }
}

var disposables = CompositeDisposable()

// List of the scope IDs that you want to retrieve
val scopes = mutableListOf("account_email", "friends")

UserApiClient.rx.scopes(scopes)
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ scopeInfo: ScopeInfo?->
        Log.i(TAG, "Succeeded in retrieving consent details succeeds.\n Scopes being used or agreed: $scopeInfo")
    }, { error: Throwable? ->
        Log.e(TAG, "Failed to retrieve consent details.", error)
    }).addTo(disposables)

If the request is successful, scopes() returns the ScopeInfo object that includes the changed details of each scope and whether a user has agreed to the scope.

ScopeInfo

Scope

Revoke consent

Basic information

This API revokes the scope that a user has agreed to. Call the revokeScopes() method in the UserApiClient class.

Parameter

Sample

// List of the scope IDs that you want to revoke
val scopes = mutableListOf("account_email", "legal_birth_date", "friends")

UserApiClient.instance.revokeScopes(scopes) { scopeInfo, error->
    if (error != null) {
        Log.e(TAG, "Failed to revoke consent.", error)
    }else if (scopeInfo != null) {
        Log.i(TAG, "Succeeded in revoking consent.\n Scopes being used or agreed: $scopeInfo")
    }
}

var disposables = CompositeDisposable()

// List of the scope IDs that you want to revoke
val scopes = mutableListOf("account_email", "legal_birth_date", "friends")

UserApiClient.rx.revokeScopes(scopes)
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ scopeInfo: ScopeInfo?->
        Log.i(TAG, "Succeeded in revoking consent.\n Scopes being used or agreed: $scopeInfo")
    }, {error: Throwable? ->
        Log.e(TAG, "Failed to revoke consent.", error)
    }).addTo(disposables)

If the request is successful, revokeScopes() returns the ScopeInfo object that includes the changed details of each scope and whether a user has agreed to the scope.

Retrieve user agreed terms

Basic information

To check which terms a user has consented to when the user logs in, call the serviceTerms() method defined in the UserApiClient class.

Parameter

Sample

// Check the terms that a user has consented
UserApiClient.instance.serviceTerms { userServiceTerms, error ->
    if (error != null) {
        Log.e(TAG, "Failed to check the agreed terms", error)
    }
    else if (userServiceTerms != null) {
        Log.i(TAG, "Succeeded in checking the agreed terms" +
                "\nService user ID: ${userServiceTerms.userId}" +
                "\nAgreed terms: \n${userServiceTerms.allowedServiceTerms?.joinToString("\n")}")
    }
}

var disposables = CompositeDisposable()

// the terms that a user has consented
UserApiClient.rx.serviceTerms()
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ userServiceTerms ->
        Log.i(TAG, "Succeeded in check the agreed terms" +
                "\nService user ID: ${userServiceTerms.userId}" +
                "\nAgreed terms: \n${userServiceTerms.allowedServiceTerms?.joinToString("\n")}")
    }, { error ->
        Log.e(TAG, "Failed to check the agreed terms", error)
    })
    .addTo(disposables)

serviceTerms() returns the UserServiceTerms object.

UserServiceTerms

AppServiceTerms

ServiceTerms

Get consent to desired terms

Basic information

This API enables you to request consent to a specific term that a user has not consented, regardless of whether the user has already signed up or not.

If your app is used for multiple services and each service requires consent to different terms, or if a new required term is added to your service, you can use this API. For more details, Design terms and policies.

To request consent to specific scopes from a user, pass the list of term tags through serviceTerms as an argument when you call loginWithKakaoTalk() or loginWithKakaoAccount().

If you do not add serviceTerms when requesting an authorization code, the general Kakao Login API proceeds. In this case, you cannot request consent to the desired terms. Also, if a user has already consented to all required terms, the user is logged in without the Consent screen prompted. For more details, refer to FAQ.

Parameter

Sample

// Get consent to desired terms

// Designate tags for the terms that you want to get consent
// among the terms registered in [My Application] > [Simple Signup] in Kakao Developers. 
val serviceTerms = listOf("service")

// Request login with Kakao Talk using the serviceTerms parameter (same for Login with Kakao Account)
UserApiClient.instance.loginWithKakaoTalk(
    context = context,
    serviceTerms = serviceTerms
) { token, error ->
    if (error != null) {
        Log.e(TAG, "Login fail", error)
    }
    else if (token != null) {
        Log.i(TAG, "Login success ${token.accessToken}")
    }
}

var disposables = CompositeDisposable()

// Get consent to desired terms

// Designate tags for the terms that you want to get consent
// among the terms registered in [My Application] > [Simple Signup] in Kakao Developers. 
val serviceTerms = listOf("service")

// Request login with Kakao Talk using the serviceTerms parameter (same for Login with Kakao Account)
UserApiClient.rx.loginWithKakaoTalk(
    context = context,
    serviceTerms = serviceTerms
)
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ token ->
        Log.i(TAG, "Login success ${token.accessToken}")
    }, { error ->
        Log.e(TAG, "Login fail", error)
    })
    .addTo(disposables)

The response is returned through the OAuthToken object in the same as the Kakao Login.

Advanced: Manual signup

Basic information

The Manual signup API manually links a user with your app to complete signup when the Auto-link is disabled.

To figure out if the currently logged-in user needs to be linked with your app, check the value of hasSignedUp in the response of the Retrieving user information API and handle each case:

• true: The user is already linked with your app. You do not need to call the Manual signup API.
• false: The user is not linked with your app. You must call signup() to link the user with your app manually.
• null: Your app is using the Auto-link feature. You do not need to call the Manual signup API.

UserApiClient.instance.me { user, error ->
    if (error != null) {
        Log.e(TAG, "Retrieving user information fails", error)
    } else {
        Log.i(TAG, "Retrieving user information succeeds" +
                "\nService user ID: ${user.id}" +
                "\nLinked status: ${user.hasSignedUp}")
    }
}

var disposables = CompositeDisposable()

UserApiClient.rx.me()
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ user ->
        Log.i(TAG, "Retrieving user information succeeds" +
                "\nService user ID: ${user.id}" +
                "\nLinked status: ${user.hasSignedUp}")
    }, { error ->
        Log.e(TAG, "Retrieving user information fails", error)
    }).addTo(disposables)

If the return value of hasSignedUp is false and the user is ready to sign up, call the signup() method to complete the signup.

Parameter

Sample

UserApiClient.instance.signup { error ->
    if (error != null) {
        Log.e(TAG, "signup fails", error)
    } else {
        Log.i(TAG, "signup succeeds")
    }
}

var disposables = CompositeDisposable()

UserApiClient.rx.signup()
        .subscribeOn(Schedulers.io())
        .subscribe(Action { showSnackbar("signup() succeeds") }, onError).addTo(disposables)

If the request is successful, the user's service ID is returned.

To check the request result, request the Retrieving user information API again and check the value of hasSignedUp because the user's linked status is not provided even when the request is successful.

See more

• Download Android SDK
• API Reference →