Google Drive Android Api Completion Event for Folder Creation

问题

The completion events in Google Drive Android Api (GDAA) seem to be invoked only by contents change (file create, file contents update). Since I need to retrieve a Resource Id of a folder (seen here for a file with contents), referring to this method:

   DriveFolder.createFolder(mGAC, meta).setResultCallback(...);

I need a completion event for a folder creation, but I can't find a solution.

Any hints? Thank you.

回答1:

No, takers for this question, so I assume there is no straightforward solution. Meanwhile, I slammed together a hack until this gets fixed (if ever).

1/ Create a folder, you get the 'preliminary' DriveId that YIELDS NO ResourceId (nothing's commited).

2/ Use this DriveId as a parent of a dummy file with a dummy content and a completion event request attached. The folder creation is now apparently forced by it's child.

3/ In the completion event (as seen here), get the dummy file's DriveId and retrieve it's parent ID:

  com.google.android.gms.common.api.GoogleApiClient GAC;   
  //...   
  DriveId parentID(DriveId dId) {
    MetadataBuffer mdb = null;
    DriveApi.MetadataBufferResult mbRslt = dId.asDriveResource().listParents(GAC).await();
    if (mbRslt.getStatus().isSuccess()) try {
      mdb = mbRslt.getMetadataBuffer();
      if (mdb.getCount() > 0)
        return mdb.get(0).getDriveId();
    } catch (Exception e) { e.printStackTrace();}
    finally {
      if (mdb != null) mdb.close();
    }
    return null;   
  }

('await()' flavor works here since 'DriveEventService' is off-UI)

Now you get folder's 'real' DriveId that can produce a valid ResourceId:

String resourceId = driveId.getResourceId()

4/ zap the dummy file that has served it's lifetime mission

Is there a better solution? Please let me know.

来源：https://stackoverflow.com/questions/34318220/google-drive-android-api-completion-event-for-folder-creation

标签

google-drive-android-api