Play sounds in a loop from a list

 Intent intent = new Intent(Intent.ACTION_VIEW);
    Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI,"1"); 
    intent.setData(uri);
    intent.setType("audio/*");
    List<ResolveInfo> apps = getPackageManager().queryIntentActivities(intent, 0);
    for (ResolveInfo rInfo : apps) {
        //process list here
    }

var a1 = new Audio('http://developer.mozilla.org/@api/deki/files/2926/=AudioTest_(1).ogg'); a1.id = "1"; // id helps to see console.log is fine
var a2 = new Audio('http://developer.mozilla.org/@api/deki/files/2926/=AudioTest_(1).ogg'); a2.id = "2";
var a3 = new Audio('http://developer.mozilla.org/@api/deki/files/2926/=AudioTest_(1).ogg'); a3.id = "3";
var a4 = new Audio('http://developer.mozilla.org/@api/deki/files/2926/=AudioTest_(1).ogg'); a4.id = "4";

var order = [2, 1, 4, 3, 2, 1];

rotateAudio(order); // main function; pass order array here

function rotateAudio(order) {
  var orderMap = {1: a1, 2: a2, 3: a3, 4: a4};
  var iterator = order[Symbol.iterator]();
  var value, done;
  
  function rotate({value, done}) { // get next iteration
    function next(e) {
      e.target.removeEventListener('ended', next); // helps for garbage removal I guess
      rotate(iterator.next())
    };
    if (done) { console.log('done!'); return };
    var current = orderMap[value];
    console.log('current: ', current);
    current.play();
    current.addEventListener('ended', next) // listen to 'ended' on audio, start next one
  }
  
  rotate(iterator.next()); // first call
}