Best method to shuffle songs in music player

I am trying to make a music player app. For the shuffle option in the app ,

let's say when one song is completed, I use the Random function to generate a number from the list of the songs' ID.

Random r=new Random();
                int i1= r.nextInt(songs.newCurrentPlayList.size()-1);
                songs.newCurrentPlayingSongItemInPlaylist=i1;

Using this method, many times the song is repeated. That's why I am skeptical about using this method.

Is there any better approach to shuffle the songs?

Thanks in Advance!