Question

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Closed 11 years ago.

Bitmap bmp;
bmp = (Android.Graphics.Bitmap)data.Extras.Get("data");
CallToFunction (bmp);

用 Bitmap 调用函数。

private void CallToFunction(Bitmap bmp)
    {
       if(bmp)
         {
         }
    }

Answer 1

private void CallToFunction(Bitmap bmp)
{
       if (bmp != null)
       {
       }
 }

Answer 2

不过我猜想,当你暗含转换到“数据”可能无效的位图时, 你会得到一个完全无效的引用例外?

在转换为位图前检查数据不是空的。

var data = data.Extras.Get("data");
if(data != null){

    CallToFunction ((Android.Graphics.Bitmap)data);
}

Answer 3

您可以通过

if(data.Extras.Get("data")!=null && data.Extras.Get("data") instanceOf Bitmap){
     CallToFunction ((Android.Graphics.Bitmap)data.Extras.Get("data"));
}

Answer 4

You can use the following it will check if bitmap is not not null only then that method will be called other it will not called that method.

      Bitmap bmp;
       bmp = (Android.Graphics.Bitmap)data.Extras.Get("data");
       if (bmp != null)
       {
         CallToFunction (bmp);
       }

友情链接