在Android上验证Google Cloud API

Question

I'm using the Google Cloud Speech-to-text API, within my android app.

How would one authenticate to the API without the ability to set the necessary environment variable?

I've not been able to find any documentation covering authenticating on android, with the environment variable, and file

Answer 1

Your question is unclear but I think you're trying to use a service account ("file") and perhaps GOOGLE_APPLICATION_CREDENTIALS ("environment variable") to authenticate your app.

You should not.

Service Accounts are best applied to software (eg another service) that's running autonomously (ie not directly by a human user) that needs to authenticate with a Google API.

For an Android App, I think you probably wish to authenticate the human user of your app against the Google API using the full OAuth flow were your user is prompted to approve use of the Google API and then, your application is authenticated as this user.

See here for an explanation of the 3 primary authentication methods: https://cloud.google.com/docs/authentication/

See here for an overview of authenticating a human user to a Google API: https://cloud.google.com/docs/authentication/end-user

See here -- less confident in this as I've not used it -- as a way to authenticate Android apps using Google Sign-In (ie OAuth): https://developers.google.com/identity/sign-in/android/sign-in

HTH