/// <summary>
/// Method for drawing whole image from Intent data
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="data"></param>
/// <param name="context"></param>
/// <returns></returns>
public static async Task <Bitmap> CreateBitmapImage(int reqWidth, int reqHeight, int width, int height, Intent data, Context context)
{
Bitmap image = Bitmap.CreateBitmap(width, height, Bitmap.Config.Argb8888);
// Draw image into bitmap
using (Canvas can = new Canvas(image))
{
can.DrawColor(Color.Black); // Set the color
// Get the image from the stream scaled and resampled
Bitmap bmp = Bitmap.CreateScaledBitmap(await BitmapResampler.DecodeBitmapFromStreamAsync(data.Data, reqWidth, reqHeight, context), width, height, true);
can.DrawBitmap(bmp, new Rect(0, 0, width, height), new Rect(0, 0, width, height), null);
bmp.Recycle();
}
return(image);
}
/// <summary>
/// Method for drawing whole image from url asynchronously
/// </summary>
/// <param name="reqWidth"></param>
/// <param name="reqHeight"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="url"></param>
/// <param name="txtProgress"></param>
/// <param name="context"></param>
/// <returns></returns>
public static async Task <Bitmap> CreateBitmapImage(int reqWidth, int reqHeight, int width, int height, string url, TextView txtProgress, Context context)
{
Bitmap image = Bitmap.CreateBitmap(width, height, Bitmap.Config.Argb8888);
byte[] imageBytes = null;
using (WebClient webClient = new WebClient())
{
try
{
// Show download progress
webClient.DownloadProgressChanged += (s, e) =>
{
txtProgress.Text = e.ProgressPercentage.ToString() + "%";
};
// Download the image into a byte array
imageBytes = await webClient.DownloadDataTaskAsync(url);
}
catch
{
return(null);
}
}
if (imageBytes != null && imageBytes.Length > 0)
{
// Draw image into bitmap
using (Canvas can = new Canvas(image))
{
can.DrawColor(Color.Black); // Set the color
// Get the image from the byte array scaled and resampled
Bitmap bmp = Bitmap.CreateScaledBitmap(await BitmapResampler.DecodeBitmapFromStreamAsync(imageBytes, reqWidth, reqHeight, context), width, height, true);
can.DrawBitmap(bmp, new Rect(0, 0, width, height), new Rect(0, 0, width, height), null);
bmp.Recycle();
}
}
return(image);
}
