Access to the whole Drive not allowed

[mvysny]

I'm trying to use this API to access all files on user's Drive, but it is not possible:

1. Using Drive.SCOPE_FILE only lists New Folder as a child of the root folder (client.rootFolder)
2. Using just Scope("https://www.googleapis.com/auth/drive.readonly") fails with:

   java.lang.IllegalArgumentException: You must request a Drive scope in order to interact with the Drive API.
      at com.google.android.gms.common.internal.zzbq.checkArgument(Unknown Source)
      at com.google.android.gms.drive.Drive.zza(Unknown Source)
      at com.google.android.gms.drive.Drive.getDriveResourceClient(Unknown Source)

3. Using both scopes: requestScopes(Drive.SCOPE_FILE, Scope("https://www.googleapis.com/auth/drive.readonly")) seems to ignore the latter one and still only lists the New Folder

[mvysny]

4. Passing the scope of https://www.googleapis.com/auth/drive (the full access rights) fails with an exception:

   E/ClientConnectOperation: Handling authorization failure
                                                         nzh: Authorization failed: Unsupported scope: https://www.googleapis.com/auth/drive
                                                             at nzl.a(:com.google.android.gms@11951448:25)
                                                             at nvy.<init>(:com.google.android.gms@11951448:26)
                                                             at nxh.a(:com.google.android.gms@11951448:72)
                                                             at swi.run(:com.google.android.gms@11951448:11)
                                                             at mvc.run(:com.google.android.gms@11951448:26)
                                                             at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
                                                             at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
                                                             at nak.run(:com.google.android.gms@11951448)
                                                             at java.lang.Thread.run(Thread.java:761)

   Is there a way to access all files in user's Google Drive with this API?