Glide using custom ModelLoader & DataFetcher .. loadData not called

[x2hokim]

Hello~

I wan to to download image file with custom ModelLoader with AttachFileFetcher that downlaod image files & save ..
but..
AttachFileFetcher.loadData not called ... why?..

---

            Glide.with(_context)
            .using(new ChatAttachFileInfoModelLoader(_context, _roomInfo.getRoomNum(),  pbLoading))
                .load(item)
            .into(ivImage); 

public class ChatAttachFileInfoModelLoader implements StreamModelLoader {

/**
 * The default factory for {@link com.bumptech.glide.samples.flickr.FlickrModelLoader}s.
 *
public static class Factory implements ModelLoaderFactory<FileItem, InputStream> {
    private final ModelCache<FileItem, GlideUrl> modelCache = new ModelCache<FileItem, GlideUrl>(500);

    @Override
    public ModelLoader<FileItem, InputStream> build(Context context, GenericLoaderFactory factories) {
        return new FileItemThumbModelLoader(context, modelCache);
    }

    @Override
    public void teardown() {
    }
}*/

private Context _context;
private String _roomNum = null;
private ProgressBar _pbar = null;

public ChatAttachFileInfoModelLoader(Context context, String roomNum, ProgressBar pbar) 
{
    _context = context;
    _roomNum = roomNum;
    _pbar = pbar;
}

@Override
public DataFetcher<InputStream> getResourceFetcher(AttachFileInfo model, int width, int height) 
{
    return new AttachFileFetcher(_context, model, _roomNum, _pbar);
}

}

public class AttachFileFetcher implements DataFetcher {

private Context _context;
private ProgressBar _progressBar;
private AttachFileInfo _afi;
private String _roomNum;

public static final String PARAM_ATTACHFILEINFO = "aff.param.atfi";
public static final String PARAM_ROOMNUM = "aff.param.roomnum";


public AttachFileFetcher(Context context, AttachFileInfo afi, String roomNum, ProgressBar pbar) {
    _context = context;
    _afi = afi;
    _roomNum = roomNum;
    _progressBar = pbar;
}

@Override
public InputStream loadData(Priority priority) throws Exception {
    if (_progressBar!=null)
        _progressBar.setVisibility(View.VISIBLE);

           //Download file & saved code.. here

        return new FileInputStream(downloadFile);
}

@Override
public String getId() {
        String targetFileName = AttachFileInfo.getSavedFileName(_roomNum, String.valueOf(_afi.msgId),
                String.valueOf(_afi.fileNo), _afi.fileName);

        String savedFile = NMConfiguration.getInstance(_context).getNearFileTmpPath() + File.separator +targetFileName;

        return savedFile;
}

@Override
public void cleanup() {
    if (_progressBar!=null) {
        _progressBar.setVisibility(View.GONE);
        if (_progressBar.getTag()!=null && _progressBar.getTag() instanceof BaseAdapter) {
            ((BaseAdapter)_progressBar.getTag()).notifyDataSetChanged();
        }
    }
}
@Override
public void cancel() {
    // TODO: we should consider disconnecting the url connection here, but we can't do so directly because cancel is
    // often called on the main thread.
}

}

[x2hokim]

Ok~ I found error...

@OverRide
public InputStream loadData(Priority priority) throws Exception {
if (_progressBar!=null)
_progressBar.setVisibility(View.VISIBLE); <== this is error...

       //Download file & saved code.. here

    return new FileInputStream(downloadFile);

}