通过一个网络url地址获取一个bitmap对象

/**
*
* @param url
* @return
*/
public Bitmap returnBitMap(String url) {
URL myFileUrl = null;
Bitmap bitmap = null;
InputStream is=null;
try{
myFileUrl = new URL(url);
}catch(MalformedURLException e) {
e.printStackTrace();
}
try{
HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
conn.setDoInput(true);
conn.connect();
is = conn.getInputStream();
bitmap = BitmapFactory.decodeStream(is);
is.close();
}catch(IOException e) {
e.printStackTrace();
}finally {
if(is!=null)
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return bitmap;
}