Sample Project on Xamarin Android on how to create Collapsible AppBar (Toolbar) with CardView as a content of RecyclerView.

If you would like to use url instead of Image in Drawable just change the method PopulateAlbum(); using

     private static async Task<MusicData> RawMusic()
     {
        const string url = "myapimusic.json";
        var httpCleint = new HttpClient();
        var data = await httpCleint.GetStringAsync(url);
        return JsonConvert.DeserializeObject<MusicData>(data);
     }

Then Add to _albumlist