How may I create a WebView in Android to process the user's authentication? Thank You in advance.
Due to a recent change in Google's policy around using OAuth flows in web views, we no longer support or recommend using web views to process the OAuth flow, in order to support users using "Google Sign In" to sign in to Dropbox.
If you're developing with the Dropbox API on Android, we recommend using the official Dropbox API v2 Java SDK. There's an example Android app using that here that shows how to process the app authorization flow.