public static void LoadBitmap(ImageView imageView, double d, int w, int h)
{
int direction = (int)d;
// Check, if there is another image creation is running
if (CancelPotentialWork(direction, imageView))
{
// Create task for image creation
AsyncImageFromDirection asyncImageTask = new AsyncImageFromDirection(imageView, 0, w, h);
// Has the ImageView an existing AsyncDrawable
if (imageView.Drawable == null || !(imageView.Drawable is AsyncDrawable))
{
// No, than create one
AsyncDrawable asyncDrawable = new AsyncDrawable(imageView.Context.Resources, BitmapFactory.DecodeResource(imageView.Context.Resources, Android.Resource.Drawable.IcMenuGallery), asyncImageTask);
// Set it as bitmap for the ImageView until the correct image is ready
imageView.SetImageDrawable(asyncDrawable);
}
asyncImageTask.Execute(direction);
}
}
/// <summary>
/// Determines if there is another task for this ImageView, with the same direction.
/// </summary>
/// <returns><c>true</c> if no task is associated with this ImageView with the same direction; otherwise, <c>false</c>.</returns>
/// <param name="direction">Direction in degrees.</param>
/// <param name="imageView">ImageView to check.</param>
public static Boolean CancelPotentialWork(int direction, ImageView imageView)
{
AsyncImageFromDirection asyncImageTask = GetAsyncImageTask(imageView) as AsyncImageFromDirection;
if (asyncImageTask != null)
{
int?bitmapDirection = asyncImageTask.Direction;
// If bitmapDirection is not yet set or it differs from the new direction
if (bitmapDirection == null || bitmapDirection != direction)
{
// Cancel previous task, because it is not longer needed
asyncImageTask.Cancel(true);
}
else
{
// The same work is already in progress
return(false);
}
}
// No task associated with the ImageView, or an existing task was cancelled
return(true);
}
public static void LoadBitmap(ImageView imageView, double d, int w, int h)
{
int direction = (int)d;
// Check, if there is another image creation is running
if(CancelPotentialWork(direction, imageView)) {
// Create task for image creation
AsyncImageFromDirection asyncImageTask = new AsyncImageFromDirection(imageView, 0, w, h);
// Has the ImageView an existing AsyncDrawable
if(imageView.Drawable == null || !(imageView.Drawable is AsyncDrawable)) {
// No, than create one
AsyncDrawable asyncDrawable = new AsyncDrawable(imageView.Context.Resources, BitmapFactory.DecodeResource(imageView.Context.Resources, Android.Resource.Drawable.IcMenuGallery), asyncImageTask);
// Set it as bitmap for the ImageView until the correct image is ready
imageView.SetImageDrawable(asyncDrawable);
}
asyncImageTask.Execute(direction);
}
}
