how to fetch data json from server?

[kousaka-vale]

@OverRide
protected Void doInBackground(Void... voids) {
//resp = getDataResponse();
String response = loadJSONFromAsset(context);
listMusic = getMusicList(response, "music");
return null;
}

I know the code above is for retrieve json data from Assets file "music.json"
now, how to fetch data from json in the server?
please help me sir.