public override Android.Views.View OnCreateView(Android.Views.LayoutInflater inflater, Android.Views.ViewGroup container, Android.OS.Bundle savedInstanceState)
{
// Console.WriteLine("[{0}] OnCreateView Called: {1}", TAG, DateTime.Now.ToLongTimeString());
View v = inflater.Inflate(Resource.Layout.fragment_photo_gallery, container, false);
mGridView = v.FindViewById <GridView>(Resource.Id.gridView);
mGridView.Scroll += async(object sender, AbsListView.ScrollEventArgs e) => {
if (e.FirstVisibleItem + e.VisibleItemCount == e.TotalItemCount && !endReached && e.TotalItemCount > 0)
{
endReached = true;
// Console.WriteLine("[{0}] Scroll Ended", TAG);
currentPage++;
List <GalleryItem> newItems;
if (query != null)
{
newItems = await new FlickrFetchr().Search(query, currentPage.ToString());
}
else
{
newItems = await new FlickrFetchr().Fetchitems(currentPage.ToString());
}
galleryItems = galleryItems.Concat(newItems).ToList();
var adapter = (ArrayAdapter)mGridView.Adapter;
adapter.AddAll(newItems);
//adapter.NotifyDataSetChanged();
endReached = false;
}
};
mGridView.ScrollStateChanged += (object sender, AbsListView.ScrollStateChangedEventArgs e) => {
if (e.ScrollState == ScrollState.Idle)
{
if (idlePreloadTokenSource != null)
{
idlePreloadTokenSource.Cancel();
// Console.WriteLine("[{0}] IdlePreloadTaskState: {1}", TAG, idlePreloadTask.IsCompleted);
}
idlePreloadTokenSource = new CancellationTokenSource();
idlePreloadTask = Task.Run(async() => {
await new FlickrFetchr().PreloadImages(mGridView.FirstVisiblePosition, mGridView.LastVisiblePosition, galleryItems).ConfigureAwait(false);
}, idlePreloadTokenSource.Token);
}
};
mGridView.ItemClick += (object sender, AdapterView.ItemClickEventArgs e) => {
GalleryItem item = galleryItems[e.Position];
var photoPageUri = Android.Net.Uri.Parse(item.PhotoPageUrl);
// Implicit intent
// Intent i = new Intent(Intent.ActionView, photoPageUri);
// Explicit intent
Intent i = new Intent(Activity, typeof(PhotoPageActivity));
i.SetData(photoPageUri);
StartActivity(i);
};
mGridView.ItemLongClick += (object sender, AdapterView.ItemLongClickEventArgs e) => {
if (galleryItems[e.Position].Url != null && galleryItems[e.Position].Url != String.Empty)
{
Intent intent = new Intent(Activity, typeof(PhotoActivity));
intent.PutExtra(PHOTO_URL_EXTRA, galleryItems[e.Position].Url);
Activity.StartActivity(intent);
}
};
SetupAdapter();
// Console.WriteLine("[{0}] OnCreateView Done: {1}", TAG, DateTime.Now.ToLongTimeString());
return(v);
}
public async Task<List<GalleryItem>> DownloadGalleryItems(string url)
{
// Console.WriteLine("[{0}] Start DownloadGalleryItems: {1}", TAG, DateTime.Now.ToLongTimeString());
List<GalleryItem> items = new List<GalleryItem>();
try {
// Console.WriteLine("[{0}] DownloadGalleryItems Start GetUrlAsync: {1}", TAG, DateTime.Now.ToLongTimeString());
string xmlString = await GetUrlAsync(url).ConfigureAwait(false);
// Console.WriteLine("[{0}] DownloadGalleryItems End GetUrlAsync: {1}", TAG, DateTime.Now.ToLongTimeString());
// Console.WriteLine("[{0}] Received xml from Url: {1}\n{2}", TAG, url, xmlString);
// Console.WriteLine("[{0}] Received xml from Url: {1}", TAG, url);
//https://api.flickr.com:443/services/rest/?method=flickr.photos.getRecent&api_key=ea248fbeac480b7c14fce5cece516ef0&extras=url_s
XmlSerializer serializer = new XmlSerializer(typeof(rsp));
// Console.WriteLine("[{0}] Fetchitems Start Deserialzer: {1}", TAG, DateTime.Now.ToLongTimeString());
using (var reader = new StringReader(xmlString)) {
var rsp = (rsp)serializer.Deserialize(reader);
NumberOfHits = rsp.photos.total;
var photos = rsp.photos.photo;
foreach (rspPhotosPhoto photo in photos) {
//Console.WriteLine("[{0}]\nPhoto Id: {1}\nCaption: {2}\nUrl: {3}", TAG, photo.id, photo.title, photo.url_s);
GalleryItem item = new GalleryItem(){
Caption = photo.title,
Id = photo.id.ToString(),
Url = photo.url_s,
Owner = photo.owner,
Filename = GetFilenameFromUrl(photo.url_s)
};
items.Add(item);
}
}
// Console.WriteLine("[{0}] Fetchitems End Deserialzer: {1}", TAG, DateTime.Now.ToLongTimeString());
}
catch (IOException ioex) {
Console.WriteLine("[{0}] Failed to fetch items: {1}", TAG, ioex.Message);
}
catch (Exception ex){
Console.WriteLine("[{0}] Failed to parse items: {1}", TAG, ex.Message);
}
//Console.WriteLine("[{0}] End DownloadGalleryItems: {1}", TAG, DateTime.Now.ToLongTimeString());
return items;
// Using httpUtility to make query string... no ? added automatically
// try {
// var query = HttpUtility.ParseQueryString(string.Empty);
// query["method"] = methodGetRecent;
// query["api_key"] = flickrAPIKey;
// query[paramExtras] = extraSmallUrl;
//
// string url = baseUrl + query;
// string xmlString = await GetUrlAsync(url).ConfigureAwait(false);
// Console.WriteLine("[{0}] Received xml from Url: {1}\n{2}", TAG, url, xmlString);
// //https://api.flickr.com/services/rest/method=flickr.photos.getRecent&api_key=ea248fbeac480b7c14fce5cece516ef0&extras=url_s
// }
// catch (Exception ex) {
// Console.WriteLine("[{0}] Failed to fetch items: {1}", TAG, ex.Message);
// }
// Using Android API to make query string
// try {
// string url = Android.Net.Uri.Parse(baseUrl).BuildUpon()
// .AppendQueryParameter("method", methodGetRecent)
// .AppendQueryParameter("api_key", flickrAPIKey)
// .AppendQueryParameter(paramExtras, extraSmallUrl)
// .Build().ToString();
// string xmlString = await GetUrlAsync(url).ConfigureAwait(false);
// Console.WriteLine("[{0}] Received xml from Url: {1}\n{2}", TAG, url, xmlString);
// //https://api.flickr.com/services/rest/?method=flickr.photos.getRecent&api_key=ea248fbeac480b7c14fce5cece516ef0&extras=url_s
// }
// catch (Exception ex) {
// Console.WriteLine("[{0}] Failed to fetch items: {1}", TAG, ex.Message);
// }
}
public async Task <List <GalleryItem> > DownloadGalleryItems(string url)
{
// Console.WriteLine("[{0}] Start DownloadGalleryItems: {1}", TAG, DateTime.Now.ToLongTimeString());
List <GalleryItem> items = new List <GalleryItem>();
try {
// Console.WriteLine("[{0}] DownloadGalleryItems Start GetUrlAsync: {1}", TAG, DateTime.Now.ToLongTimeString());
string xmlString = await GetUrlAsync(url).ConfigureAwait(false);
// Console.WriteLine("[{0}] DownloadGalleryItems End GetUrlAsync: {1}", TAG, DateTime.Now.ToLongTimeString());
// Console.WriteLine("[{0}] Received xml from Url: {1}\n{2}", TAG, url, xmlString);
// Console.WriteLine("[{0}] Received xml from Url: {1}", TAG, url);
//https://api.flickr.com:443/services/rest/?method=flickr.photos.getRecent&api_key=ea248fbeac480b7c14fce5cece516ef0&extras=url_s
XmlSerializer serializer = new XmlSerializer(typeof(rsp));
// Console.WriteLine("[{0}] Fetchitems Start Deserialzer: {1}", TAG, DateTime.Now.ToLongTimeString());
using (var reader = new StringReader(xmlString)) {
var rsp = (rsp)serializer.Deserialize(reader);
NumberOfHits = rsp.photos.total;
var photos = rsp.photos.photo;
foreach (rspPhotosPhoto photo in photos)
{
//Console.WriteLine("[{0}]\nPhoto Id: {1}\nCaption: {2}\nUrl: {3}", TAG, photo.id, photo.title, photo.url_s);
GalleryItem item = new GalleryItem()
{
Caption = photo.title,
Id = photo.id.ToString(),
Url = photo.url_s,
Owner = photo.owner,
Filename = GetFilenameFromUrl(photo.url_s)
};
items.Add(item);
}
}
// Console.WriteLine("[{0}] Fetchitems End Deserialzer: {1}", TAG, DateTime.Now.ToLongTimeString());
}
catch (IOException ioex) {
Console.WriteLine("[{0}] Failed to fetch items: {1}", TAG, ioex.Message);
}
catch (Exception ex) {
Console.WriteLine("[{0}] Failed to parse items: {1}", TAG, ex.Message);
}
//Console.WriteLine("[{0}] End DownloadGalleryItems: {1}", TAG, DateTime.Now.ToLongTimeString());
return(items);
// Using httpUtility to make query string... no ? added automatically
// try {
// var query = HttpUtility.ParseQueryString(string.Empty);
// query["method"] = methodGetRecent;
// query["api_key"] = flickrAPIKey;
// query[paramExtras] = extraSmallUrl;
//
// string url = baseUrl + query;
// string xmlString = await GetUrlAsync(url).ConfigureAwait(false);
// Console.WriteLine("[{0}] Received xml from Url: {1}\n{2}", TAG, url, xmlString);
// //https://api.flickr.com/services/rest/method=flickr.photos.getRecent&api_key=ea248fbeac480b7c14fce5cece516ef0&extras=url_s
// }
// catch (Exception ex) {
// Console.WriteLine("[{0}] Failed to fetch items: {1}", TAG, ex.Message);
// }
// Using Android API to make query string
// try {
// string url = Android.Net.Uri.Parse(baseUrl).BuildUpon()
// .AppendQueryParameter("method", methodGetRecent)
// .AppendQueryParameter("api_key", flickrAPIKey)
// .AppendQueryParameter(paramExtras, extraSmallUrl)
// .Build().ToString();
// string xmlString = await GetUrlAsync(url).ConfigureAwait(false);
// Console.WriteLine("[{0}] Received xml from Url: {1}\n{2}", TAG, url, xmlString);
// //https://api.flickr.com/services/rest/?method=flickr.photos.getRecent&api_key=ea248fbeac480b7c14fce5cece516ef0&extras=url_s
// }
// catch (Exception ex) {
// Console.WriteLine("[{0}] Failed to fetch items: {1}", TAG, ex.Message);
// }
}