android - lv.getItemAtPosition(position) crash -


i'm new android been learning go, , @ point can't find answer. question why crashing. know problem lies at: music m = (music) lv.getitematposition(position);. can comment out , substitute string ex: string song_name = "mp3"; , works.

what i'm trying make list of songs found anywhere on phone , on selection change text of button set title of selection. said got working except when go use music m = (music) lv.getitematposition(position);

@override protected void oncreate(bundle savedinstancestate) {     // todo auto-generated method stub     super.oncreate(savedinstancestate);     listview listview = getlistview();      string selection = mediastore.audio.media.is_music + " != 0";     string[] projection = { mediastore.audio.media._id,             mediastore.audio.media.artist, mediastore.audio.media.title,             mediastore.audio.media.data, mediastore.audio.media.display_name,             mediastore.audio.media.duration};        list<string> songs = new arraylist<string>();     arrayadapter<string> arrayadaptor = new arrayadapter<string>(musiclistactivity.this, r.layout.a_listview,r.id.tv, songs);     listview.setadapter(arrayadaptor);      cursor cursor = this.getcontentresolver().query(              mediastore.audio.media.external_content_uri, projection, selection,null, null);             while(cursor.movetonext()){              songs.add(cursor.getstring(1) + "||" +                      cursor.getstring(2));              cursor.getstring(3);               collections.sort(songs);              string sname = cursor.getstring(cursor.getcolumnindex(mediastore.audio.media.title));              music mb = new music();         mb.setname(sname);         }        }  protected void onlistitemclick(listview lv, view v, int position, long id) {     super.onlistitemclick(lv, v, position, id);      music m = (music) lv.getitematposition(position);     string song_name = m.getname();       intent = getintent(); string msg = i.getstringextra("local"); if(msg.contentequals("song")){      i.putextra("songname", song_name);     setresult(result_ok, i);     finish();  } }}

here's log, 

  04-18 06:23:12.932: w/dalvikvm(3383): threadid=1: thread exiting uncaught exception (group=0x40017560)     04-18 06:23:12.932: e/androidruntime(3383): fatal exception: main     04-18 06:23:12.932: e/androidruntime(3383): java.lang.classcastexception: java.lang.string     04-18 06:23:12.932: e/androidruntime(3383):     @ com.alarm.smsalarmclock.musiclistactivity.onlistitemclick(musiclistactivity.java:59)     04-18 06:23:12.932: e/androidruntime(3383):     @ android.app.listactivity$2.onitemclick(listactivity.java:319)     04-18 06:23:12.932: e/androidruntime(3383):     @ android.widget.adapterview.performitemclick(adapterview.java:284)     04-18 06:23:12.932: e/androidruntime(3383):     @ android.widget.listview.performitemclick(listview.java:3513)     04-18 06:23:12.932: e/androidruntime(3383):     @ android.widget.abslistview$performclick.run(abslistview.java:1812)     04-18 06:23:12.932: e/androidruntime(3383):     @ android.os.handler.handlecallback(handler.java:587)     04-18 06:23:12.932: e/androidruntime(3383):     @ android.os.handler.dispatchmessage(handler.java:92)     04-18 06:23:12.932: e/androidruntime(3383):     @ android.os.looper.loop(looper.java:130)     04-18 06:23:12.932: e/androidruntime(3383):     @ android.app.activitythread.main(activitythread.java:3683)     04-18 06:23:12.932: e/androidruntime(3383):     @ java.lang.reflect.method.invokenative(native method)     04-18 06:23:12.932: e/androidruntime(3383):     @ java.lang.reflect.method.invoke(method.java:507)     04-18 06:23:12.932: e/androidruntime(3383):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:875)     04-18 06:23:12.932: e/androidruntime(3383):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:633)     04-18 06:23:12.932: e/androidruntime(3383):     @ dalvik.system.nativestart.main(native method)

i've tried googling fatal exception: main java.lang.classcastexception: java.lang.string , variations of not finding anything. if pointed in right direction helpful, , in advanced.

you try cast string music, cant. if need song name, can try:

string song_name = (string) lv.getitematposition(position);

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