How to access Google Drive from Dart.

gistfile1.dart

// Add google_drive_v2_api to pubspec.yaml

import "package:google_oauth2_client/google_oauth2_console.dart" as oauth;
import "package:google_drive_v2_api/drive_v2_api_console.dart" as drivelib;

const _IDENTIFIER = "<YOUR CLIENT ID>";
const _SECRET     = "<YOUR CLIENT SECRET>";
const _SCOPES     = const ["https://www.googleapis.com/auth/drive.file"];

void main() {
  oauth.OAuth2Console auth   = new oauth.OAuth2Console(identifier: _IDENTIFIER,
                                                       secret:     _SECRET,
                                                       scopes:     _SCOPES);
  drivelib.Drive      drive  = new drivelib.Drive(auth);
  String              fileid = "<SOME FILE ID>";

  drive.makeAuthRequests = true;
  drive.files.get(fileid).then((data) => print(data.toString()));
}