android - Error (1-10) in the MediaPlayer class -

i want create radio using on-line stream via http protocol. error(1,-10). don't know how resolve it. please help. thanks! below code:

string url = "http://";         mediaplayer radio = new mediaplayer();         radio.setaudiostreamtype(audiomanager.stream_music);           try {             radio.setdatasource(url);         } catch (exception e) {             e.printstacktrace();         }             radio.prepareasync();          radio.setonpreparedlistener(new mediaplayer.onpreparedlistener() {              @override             public void onprepared(mediaplayer radio) {                     radio.start();             }         });