如何在imagebutton中显示URL中的图像 - xamarin Android

Question

我是Xamarin的新手。我一直在尝试从C＃for Xamarin中的特定URL设置图像到Imagebutton。我用Google搜索，无法找到示例代码或文档。如果有人为我提供了有用的文档或一些示例代码，那将会很有帮助。

先谢谢...... :)

Answer 1

要从本地图像设置按钮的“默认”图像，请调用SetImage

button1 = UIButton.FromType(UIButtonType.RoundedRect);
button1.SetImage(UIImage.FromFile ("sample.png"), UIControlState.Normal);

从网址申请

button1  = FindViewById(Resource.Id.RoundedRect);
var imageBitmap = GetImageBitmapFromUrl("http://xamarin.com/resources/design/home/test.png");
button1.SetImageBitmap(imageBitmap);


private Bitmap GetImageBitmapFromUrl(string url)
{
     Bitmap imageBitmap = null;

     using (var webClient = new WebClient())
     {
          var imageBytes = webClient.DownloadData(url);
          if (imageBytes != null && imageBytes.Length > 0)
          {
               imageBitmap = BitmapFactory.DecodeByteArray(imageBytes, 0, imageBytes.Length);
          }
     }

     return imageBitmap;
}