if (File.Exists(productInfo.预览图路径))
       this.picPreview.Image = BitmapFactory.Alloc(productInfo.预览图路径, false);
else
       this.picPreview.Image = null;

var bmp = _imgQueue.Dequeue();

if (i == 0)
  pic0.Image = (Bitmap)bmp.Clone();
else if (i == 1)
  pic1.Image = (Bitmap)bmp.Clone();
else if (i == 2)
  pic2.Image = (Bitmap)bmp.Clone();
else
  picPreview.Image = (Bitmap)bmp.Clone();