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google-glassgoogle-gdk

Updating a Card in a CardScrollAdapter from an AsyncTask

I've implemented a CardScrollAdapter to show a list of Cards in Google Glass. Each card has text and an image. I want the image to come from a content provider (specifically, MediaStore.Video.Thumbnails) so it must be loaded in an AsyncTask.

How can I modify the view returned from the adapter's getView method from the AsyncTask, where the view is obtained from a Card?

    @Override
public View getView(int position, View convertView, ViewGroup parent) {
    if(convertView == null) {
        view = mInflater.inflate(R.layout.movie_row, parent, false);
    } else {
        view = convertView;
    }

    mVideoColumnIndex = mCursor.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME);
    mIdColumnIndex = mCursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID);

    mCursor.moveToPosition(position);

    Card card = new Card(mContext);
    card.setImageLayout(ImageLayout.FULL);
    card.setText(mCursor.getString(mVideoColumnIndex));
    card.setFootnote((String.format("%d of %d", mCursor.getPosition() + 1, mCursor.getCount())));


    long id = mCursor.getLong(mIdColumnIndex);

            // AsyncTask not included for brevity (since it doesn't work yet)
    new ImageLoader().execute(card, Long.valueOf(id));

    return card.getView();
}
Solution

  • You need to create your owns layouts. If you use Card, you can't modify the image after calling getView()

    If you don't know how to do a similar layout of Card, Google give you some examples here: https://developers.google.com/glass/develop/gdk/ui-widgets#xml_layouts

    PD: I think that you could change the image if you could know the id of the imageView that is created when card.getView() is called and i think you can do this while you are debuging and cheking the variables.