@Override
public void onConnected(Bundle connectionHint) {
    super.onConnected(connectionHint);
    IntentSender intentSender = Drive.DriveApi
            .newOpenFileActivityBuilder()
            .setMimeType(new String[] { "text/plain", "text/html" })
            .build(getGoogleApiClient());
    try {
        startIntentSenderForResult(
                intentSender, REQUEST_CODE_OPENER, null, 0, 0, 0);
    } catch (SendIntentException e) {
        Log.w(TAG, "Unable to send intent", e);
    }
}

ResultCallback<DriveContentsResult> newDriveContentsCallback = new
        ResultCallback<DriveContentsResult>() {
    @Override
    public void onResult(DriveContentsResult result) {
        MetadataChangeSet metadataChangeSet = new MetadataChangeSet.Builder()
                .setMimeType("text/html").build();
        IntentSender intentSender = Drive.DriveApi
                 .newCreateFileActivityBuilder()
                 .setInitialMetadata(metadataChangeSet)
                 .setInitialDriveContents(result.getDriveContents())
                 .build(getGoogleApiClient());
        try {
            startIntentSenderForResult(
                    intentSender, REQUEST_CODE_CREATOR, null, 0, 0, 0);
        } catch (SendIntentException e) {
            Log.w(TAG, "Unable to send intent", e);
        }
    }
}