java - asynctask fatal exception #1 in loadermanager -

i have problem loadermanager should extracts data contentprovider. error :

06-27 10:14:29.053: e/androidruntime(2270): fatal exception: asynctask #1 06-27 10:14:29.053: e/androidruntime(2270): process: com.trackme, pid: 2270 06-27 10:14:29.053: e/androidruntime(2270): java.lang.runtimeexception: error occured while executing doinbackground() 06-27 10:14:29.053: e/androidruntime(2270):     @ android.os.asynctask$3.done(asynctask.java:300) 06-27 10:14:29.053: e/androidruntime(2270):     @ java.util.concurrent.futuretask.finishcompletion(futuretask.java:355) 06-27 10:14:29.053: e/androidruntime(2270):     @ java.util.concurrent.futuretask.setexception(futuretask.java:222) 06-27 10:14:29.053: e/androidruntime(2270):     @ java.util.concurrent.futuretask.run(futuretask.java:242) 06-27 10:14:29.053: e/androidruntime(2270):     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112) 06-27 10:14:29.053: e/androidruntime(2270):     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587) 06-27 10:14:29.053: e/androidruntime(2270):     @ java.lang.thread.run(thread.java:841) 06-27 10:14:29.053: e/androidruntime(2270): caused by: java.lang.indexoutofboundsexception` 

and code :

public class routeslistactivity extends listactivity implements loadermanager.loadercallbacks<cursor>{  public static final string tag = "routelist";  private static final int loader_id = 1;  public static final int activity_create = 0; public static final int activity_results = 1;  private simplecursoradapter mroutescursoradapter;  @override protected void oncreate(bundle savedinstancestate){      log.i(tag, "oncreate della lista ");      super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_routes_list);      string[] = new string[] {geoprovider.key_rowid};     int[] = new int[] {r.id.route1};      mroutescursoradapter = new simplecursoradapter(this, r.layout.route_row, null, from, to, 0);     setlistadapter(mroutescursoradapter);      //permette di interfacciare l'activity col loader     loadermanager lm = getloadermanager();     lm.initloader(loader_id, null, this);      registerforcontextmenu(getlistview());      log.i(tag, "fine del metodo oncreate"); }   public boolean oncreateoptionmenu(menu menu) {      log.i(tag, "creazione dell'optionmenu");      super.oncreateoptionsmenu(menu);     getmenuinflater().inflate(r.menu.routes_list, menu);     return true; }   public boolean onoptionitemselected(menuitem item) {      log.i(tag, "selezione dell'item del menu ");      super.onoptionsitemselected(item);     switch(item.getitemid()) {     case r.id.create_route:         createroute();         return true;     }     return super.onoptionsitemselected(item); }  @override protected void onlistitemclick(listview l, view v, int position, long id) {      log.i(tag, "selezione elemento della lista ");      super.onlistitemclick(l, v, position, id);     showresults(id); }  @override public void oncreatecontextmenu(contextmenu menu, view v, contextmenuinfo menuinfo){     super.oncreatecontextmenu(menu, v, menuinfo);     getmenuinflater().inflate(r.menu.context, menu); }  @override protected void onactivityresult(int requestcode, int resultcode, intent intent) {     super.onactivityresult(requestcode, resultcode, intent); }  private void createroute(){     log.i(tag , "createroute");     intent toroute = new intent(this, geoactivity.class);     startactivityforresult(toroute, activity_create); }  private void deleteroute(long id) {     log.i(tag , "deleteroute");     uri baseuri = geoprovider.geo_table_uri;     long idwrapper = long.valueof(id);     getcontentresolver().delete(uri.withappendedpath(baseuri, idwrapper.tostring()), null, null); }  private void showresults(long id){     log.i(tag , "showresults");     intent toresults = new intent(this, results.class);     toresults.putextra(geoprovider.key_rowid, id);     startactivityforresult(toresults, activity_results); }  //il loader serve per il caricamento asincrono dei dati dal db @override public loader<cursor> oncreateloader(int id, bundle args){     log.i(tag , "oncreateloader");     return new cursorloader(this, geoprovider.geo_table_uri, new string[] {geoprovider.key_rowid},             null, null, null); }  @override public void onloadfinished(loader<cursor> loader, cursor cursor) {     log.i(tag , "onloadfinished");     switch(loader.getid()){     case loader_id:         log.i(tag , "onloadfinished case loader_id");         mroutescursoradapter.swapcursor(cursor);         break;     }     log.i(tag , "fine onloadfinished"); }  @override public void onloaderreset(loader<cursor> arg0){     mroutescursoradapter.swapcursor(null); } 

}

i can't understand why i'm getting error not using class asynctask! contentprovider should ok , in opinion error here don't know where...

thanks

you getting indexoutofboundsexception in asynctask. means trying access index outside range of array. example in code:

int[] x = new int[5]; // x has size 5 int y = x[10]; // outofbounds since x has size of 5, , trying access 11th element (index 10) 

your example shows activity cannot find , have change asynctask, can view this related question see example of indexoutofboundsexception.