Add the Zoho maven repository URL in app/build.gradle:

Integrate Zoho Creator Core Library & Authentication Library in app/build.gradle

Add the below string in the strings.xml of your app:

In the oncreate method in your application / activity class, Initialize the Accounts SDK as follows:

ZohoSDK.getInstance(this).init(scopes, showlogs);

where,

• scopes - "aaaserver.profile.READ,zohocontacts.userphoto.READ,ZohoContacts.contactapi.READ,
  ZohoCreator.meta.CREATE,ZohoCreator.meta.READ,ZohoCreator.meta.UPDATE,
  ZohoCreator.meta.DELETE,ZohoCreator.data.CREATE,ZohoCreator.data.READ,
  ZohoCreator.data.UPDATE,ZohoCreator.data.DELETE,Stratus.stratusop.READ,
  ZohoCRM.modules.READ,ZohoCRM.users.READ"

  Note: The scope list have been updated for version 1.4 and above.
• showLogs - To show debug logs or not

Create an Activity called HandleRedirectActivity and add the following code in its oncreate method:

ZohoSDK.getInstance(this).handleRedirection(this);

Add the following code to the AndroidManifest.xml file:

To open the login screen, add the below code snippet:

val sdk = ZohoSDK.getInstance(applicationContext)
if (!sdk.isUserSignedIn) {
   sdk.presentLoginScreen(this, object : ZohoTokenCallback {

      override fun onTokenFetchInitiated() {

      }

      override fun onTokenFetchComplete(zohoToken: ZohoToken?) {
         // This method will be called after user logged-in successfully
      }

      override fun onTokenFetchFailed(zohoErrorCodes: ZohoErrorCodes?) {
         // This method will be called if any error occurred in the login. You will receive the error code in this callback.
      }

   }, null)
} else {
   // Start intent to your first activity
}

Implement the Creator Authentication interface ZCOauthHelper as follows:

class ZCAuthImpl(private val context: Context) : ZCOauthHelper {

    @Throws(ZCException::class)
    override suspend fun getAccessToken(): String? {
        return ZohoSDK.getInstance(context).token.token
    }

    override fun getInitialScopes(context: Context): String 	  {
        return ""
    }

    override fun isUserSignedIn(): Boolean {
        return false
    }

    override fun getUserData(): Any? {
        return null
    }

    override fun getTransformedUrl(url: String): String {
        return url
    }

    override fun checkAndLogout(): Boolean {
        return false
    }
override fun isEnhanceTokenNeeded(newScopes: String): Boolean {
        return false
    }

    override fun enhanceToken(tokenHelper: ZCOauthHelper.ZCOAuthTokenHelper, newScopes: String) {
    }
}

Add the following code to your application's / activity's oncreate method to set the instance of Authentication interface to the Creator SDK:

ZCAPIUtil.setOAuthHelper(ZCAuthImpl(applicationContext))

Initialize ZohoCreator SDK in your application's / activity's oncreate method:

ZCAPIUtil.initialize(applicationContext)