Android Programming: The Big Nerd Ranch Guide, Third Edition

From AsyncTask Back to the Main Thread

To finish off, let’s switch to the view layer and get PhotoGalleryFragment’s RecyclerView to display some captions.

First define a ViewHolder as an inner class.

Listing 25.14  Adding a ViewHolder implementation (PhotoGalleryFragment.java)

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        ...
    }

    private class PhotoHolder extends RecyclerView.ViewHolder {
        private TextView mTitleTextView;

        public PhotoHolder(View itemView) {
            super(itemView);

            mTitleTextView = (TextView) itemView;
        }

        public void bindGalleryItem(GalleryItem item) {
            mTitleTextView.setText(item.toString());
        }
    } private class FetchItemsTask extends AsyncTask<Void,Void,Void> ...