Iam previously using the v1 version of the dialogflow and then they announced that they are going to suspend it.I migrated my code in the cloud functions to the v2. But i could not find a way to integrate it into the ios and android apps. Please help me out. Thanks.
To update your agent to V2, you should create a Cloud Function for Firebase that sends requests to Dialogflow (using dialogflow-nodejs-client-v2), then call that Cloud Function from your iOS or Android code rather than calling the API directly.
The major benefit of this approach is that you will no longer have your API credentials exposed on the client side, which is a security risk.
来源：https://stackoverflow.com/questions/50981178/dialogflow-integration-of-enterprise-edition-v2-into-the-ios-and-andriod-app