Bitmap android.graphics.BitmapFactory.decodeStream(InputStream is)public static Bitmap decodeStream (InputStream is)
Since: API Level 1
Decode an input stream into a bitmap. <strong>If the input stream is null, or cannot be used to decode a bitmap, the function returns null</strong>. The stream's position will be where ever it was after the encoded data was read.Parameters
is  The input stream that holds the raw data to be decoded into a bitmap. Returns
The decoded bitmap, or null if the image data could not be decoded. 

public static Bitmap bmpFromURL(URL imageURL){Bitmap result = null;try {HttpURLConnection connection = (HttpURLConnection)imageURL .openConnection();connection.setDoInput(true);connection.connect();InputStream input = connection.getInputStream();result = BitmapFactory.decodeStream(input);} catch (IOException e) {e.printStackTrace();}return result;
}

result = BitmapFactory.decodeStream(new PatchInputStream(input));

public class PatchInputStream extends FilterInputStream{protected PatchInputStream(InputStream in) {super(in);// TODO Auto-generated constructor stub
        }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;}}

InputStream is = httpConn.getInputStream();

if (is == null){
       throw new RuntimeException("stream is null");
  }else{
       try {
           byte[] data=readStream(is);
           if(data!=null){
           bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
       }
  } catch (Exception e) {
       e.printStackTrace();
  }
   is.close();
  }

    /** 得到图片字节流 数组大小* */public static byte[] readStream(InputStream inStream) throws Exception{      ByteArrayOutputStream outStream = new ByteArrayOutputStream();      byte[] buffer = new byte[1024];      int len = 0;      while( (len=inStream.read(buffer)) != -1){      outStream.write(buffer, 0, len);      }      outStream.close();      inStream.close();      return outStream.toByteArray();      }