圖像有時返回null圖像

Question

我使用下面的代碼從URL下載一個位圖，：

 

myFileUrl = new URL(fileUrl); 


HttpURLConnection conn = (HttpURLConnection) myFileUrl 
        .openConnection(); 
conn.setDoInput(true); 
conn.connect(); 
InputStream is = conn.getInputStream(); 
Bitmap bmpTemp = BitmapFactory.decodeStream(is); 

但有時，我在一百倍意味着一次，位圖是空！任何機構知道什麼可能是問題，

謝謝

Answer 1

有一個在連接中的錯誤。它有一個修復程序，它使用FlushedInputStream裝飾器功能。 這裏是它的代碼：

/* 
    * An InputStream that skips the exact number of bytes provided, unless it reaches EOF. 
    */ 
    public static class FlushedInputStream extends FilterInputStream { 

     public FlushedInputStream(InputStream inputStream) { 
      super(inputStream); 
     } 
     @Override 
     public long skip(long n) throws IOException { 
      long totalBytesSkipped = 0L; 
      while (totalBytesSkipped < n) { 
       long bytesSkipped = in.skip(n - totalBytesSkipped); 
       if (bytesSkipped == 0L) { 
        int b = read(); 
        if (b < 0) { 
         break; // we reached EOF 
        } else { 
         bytesSkipped = 1; // we read one byte 
        } 
       } 
       totalBytesSkipped += bytesSkipped; 
      } 
      return totalBytesSkipped; 
     } 
    } 

的用法是：

BitmapFactory.decodeStream(new FlushedInputStream(is));