void FreeImageResources( )
{
if (HeaderImage != null)
{
HeaderImage.Recycle( );
HeaderImage.Dispose( );
HeaderImage = null;
}
if (ImageBanner != null && ImageBanner.Drawable != null)
{
ImageBanner.Drawable.Dispose( );
ImageBanner.SetImageBitmap(null);
}
}
bool TryLoadBanner(string filename)
{
// if the file exists
if (FileCache.Instance.FileExists(filename) == true)
{
// load it asynchronously
AsyncLoader.LoadImage(filename, false, false,
delegate(Bitmap imageBmp)
{
if (IsFragmentActive == true)
{
// if for some reason it loaded corrupt, remove it.
if (imageBmp == null)
{
FileCache.Instance.RemoveFile(filename);
return(false);
}
else
{
FreeImageResources( );
HeaderImage = imageBmp;
ImageBanner.SetImageBitmap(HeaderImage);
ImageBanner.Invalidate( );
Rock.Mobile.PlatformSpecific.Android.UI.Util.FadeView(ImageBanner, true, null);
return(true);
}
}
return(false);
});
return(true);
}
else
{
return(false);
}
}
void SetupDisplay(View view)
{
// get the placeholder image in case we need it
// attempt to load the image from cache. If that doesn't work, use a placeholder
HeaderImage = null;
bool imageExists = TryLoadBanner(HeaderImageName);
if (imageExists == false)
{
// use the placeholder and request the image download
string widthParam = string.Format("&width={0}", NavbarFragment.GetContainerDisplayWidth_Landscape( ));
string requestUrl = Rock.Mobile.Util.Strings.Parsers.AddParamToURL(HeaderImageURL, widthParam);
FileCache.Instance.DownloadFileToCache(requestUrl, HeaderImageName, null,
delegate
{
TryLoadBanner(HeaderImageName);
});
AsyncLoader.LoadImage(PrivateGeneralConfig.NewsDetailsPlaceholder, true, false,
delegate(Bitmap imageBmp)
{
if (IsFragmentActive == true && imageBmp != null)
{
HeaderImage = imageBmp;
ImageBanner.SetImageBitmap(HeaderImage);
ImageBanner.Invalidate( );
Rock.Mobile.PlatformSpecific.Android.UI.Util.FadeView(ImageBanner, true, null);
return(true);
}
return(false);
});
}
}
