//Called when application is started.
function OnStart()
{
  //Create a layout with objects vertically centered.
  lay = app.CreateLayout("linear", "VCenter,FillXY");

  //Create a list and add to layout.
  lst = app.CreateList("Please Wait");
  lay.AddChild(lst);
  //Add layout to app.
  app.AddLayout(lay);

  app.ShowProgress("Loading...");
  lst.SetList(GetDirs("/sdcard/DroidScript", []).sort());
  app.HideProgress();
}

//Check a directory for subdirectories.
function GetDirs(path, kidsfound)
{
  if (path != null && app.IsFolder(path))
  {
    kidsfound.push(path);
    var children = app.ListFolder(path);
    for (var i = 0; i < children.length; i++)
    {
      var fil = path + "/" + children[i];
      if (app.IsFolder(fil))
      {
        kidsfound = GetDirs(fil, kidsfound);
      }
    }
  }
  return kidsfound;
}