是否可以使用BitmapFactory.decodeFile方法解码来自http位置的图像？

Question

我想知道是否可以使用BitmapFactory.decodeFile方法解码来自http位置的图像？

例如.

ImageView imageview = new ImageView(context);
Bitmap bmp = BitmapFactory.decodeFile("http://<my IP>/test/abc.jpg");  
imageview.setImageBitmap(bmp);

但是bmp总是返回null.

有没有其他方法来实现这种情况,我的服务器PC中有一组图像,我通过xml将图像加载到我的画廊应用程序？

谢谢,
森

Answer 1

使用decodeStream并传递URL的输入流.

这是一个例子:

Bitmap bmp = BitmapFactory.decodeStream(new java.net.URL(url).openStream())

Answer 2

@Amir&@Sankar:感谢您提出的宝贵建议.

我通过执行以下代码片段解决了上述问题:

ImageView iv = new ImageView(context);

try{
    String url1 = "http://<my IP>/test/abc.jpg";
    URL ulrn = new URL(url1);
    HttpURLConnection con = (HttpURLConnection)ulrn.openConnection();
    InputStream is = con.getInputStream();
    Bitmap bmp = BitmapFactory.decodeStream(is);
    if (null != bmp)
        iv.setImageBitmap(bmp);
    else
        System.out.println("The Bitmap is NULL");

} catch(Exception e) {
}

谢谢,
森

Answer 3

String urldisplay="http://www.google.com/";//sample url
Log.d("url_dispaly",urldisplay);
try{    
InputStream in = new java.net.URL(urldisplay).openStream();
Bitmap  mIcon11 = BitmapFactory.decodeStream(new SanInputStream(in));
}
catch(Exception e){}

创建类名SanInputStream

public class SanInputStream extends FilterInputStream {
      public SanInputStream(InputStream in) {
        super(in);
      }
      public long skip(long n) throws IOException {
        long m = 0L;
        while (m < n) {
          long _m = in.skip(n-m);
          if (_m == 0L) break;
          m += _m;
        }

        return m;
      }
}