(Sample code by Dave Smart taken from the DroidScript Google Group)
Here is an example of how to list all files on your Lego NXT brick:
//Called when application is started. function OnStart() { //Create our screen layout. CreateLayout(); //Create NXT controller object. nxt = app.CreateNxt(); } //Create the screen layout. function CreateLayout() { //Create the layout (with repeating pattern background). lay = app.CreateLayout( "Linear", "VCenter,FillXY" ); lay.SetBackground( "/Sys/Img/Tile.png", "repeat" ); //Create 'Connect' button. btn = app.CreateButton( "Connect", 0.3,0.1, "Lego" ); btn.SetMargins( 0,0,0,0.1 ); btn.SetOnTouch( btn_OnTouch ); lay.AddChild( btn ); //Create 'List Files' button. btnCon = app.CreateButton( "List Files", 0.3, 0.1, "Lego" ); btnCon.SetOnTouch( btnCon_OnTouch ); lay.AddChild( btnCon ); //Add layout to the app. app.AddLayout( lay ); } //Called when user presses connect. function btn_OnTouch() { //Show list of NXT devices. nxt.ShowDevices(); } //Called when 'List Files' button is pressed. function btnCon_OnTouch( e ) { alert( ListFiles( "*.*" ) ); } //List files on the NXT using a search pattern. //eg. "*.rso" finds all sound files. function ListFiles( pattern ) { app.ShowProgress("Working..."); //Find first matching file on nxt. var list = ""; var inf = nxt.FileFindFirst( pattern ); if( inf!=null ) list = inf.GetName(); //Find remaining files. while( 1 ) { inf = nxt.FileFindNext( inf.GetHandle() ); if( inf==null ) break; list += "," + inf.GetName(); } app.HideProgress(); return list; }