無法將Java.IO.FileOutputStream轉換爲System.IO.Stream？

Question

我試圖保存圖片並在行bitmapImg.Compress（Bitmap.CompressFormat.Png，90，fos）;顯示錯誤無法將Java.IO.FileOutputStream轉換爲System.IO.Stream。如何解決它？

File file = new File(Android.OS.Environment.DirectoryPictures + File.Separator + "newProdict.png"); 
      FileOutputStream fos = null; 
      try 
      { 
       fos = new FileOutputStream(file); 
       if (fos != null) 
       { 
        bitmapImg.Compress(Bitmap.CompressFormat.Png, 90, fos); 
        fos.Close(); 
       } 
      } 
      catch (Exception ex) { } 

Answer 1

壓縮功能期待，而你從Java命名空間傳遞一個類從.NET System.IO.Stream派生出來的，使用FileStream來代替：

try 
    { 

    string path = Path.Combine(Environment.GetExternalStoragePublicDirectory(Environment.DirectoryPictures).AbsolutePath, "newProdict.png"); 
    var fs = new FileStream(path, FileMode.Open); 
     if (fs != null) 
     { 
      bitmapImg.Compress(Bitmap.CompressFormat.Png, 90, fs); 
      fos.Close(); 
     } 
    } 
    catch (Exception ex) { }