I\'ve been trying to save a plain text file into a specific folder in Google Drive on Android.
So far using the Documentation and QuickStart Guide on Google Drive I
You need to use the parent parameter to put a file in a folder using insert. More details at https://developers.google.com/drive/v2/reference/files/insert
Something like this
File body = new File();
body.setTitle(fileContent.getName());
body.setMimeType("text/plain");
body.setParents(Arrays.asList(new File.ParentReference().setId(parentId));
File file = service.files().insert(body, textContent).execute();