android - update multiple home screen widget from activity -

i have 2 widgets on home screen. know how update single widget main activity. following code updates single widget when press button on main activity.

@override public void onbackpressed() {     intent intent = new intent(this, todo_widget.class);     intent.setaction("android.appwidget.action.appwidget_update");     int[] ids = appwidgetmanager.getinstance(getapplication())             .getappwidgetids(                     new componentname(getapplication(),         todo_widget.class));     intent.putextra(appwidgetmanager.extra_appwidget_ids, ids);     sendbroadcast(intent);} 

but both widgets not updating if put code :-

@override public void onbackpressed() {     intent intent = new intent(this, todo_widget.class);     intent.setaction("android.appwidget.action.appwidget_update");     int[] ids = appwidgetmanager.getinstance(getapplication())             .getappwidgetids(                     new componentname(getapplication(),     todo_widget.class));     intent.putextra(appwidgetmanager.extra_appwidget_ids, ids);     sendbroadcast(intent);     intent intent1 = new intent(this, todo_widget2.class);     intent1.setaction("android.appwidget.action.appwidget_update");     int[] ids1 = appwidgetmanager.getinstance(getapplication())             .getappwidgetids(                     new componentname(getapplication(), todo_widget2.class));     intent.putextra(appwidgetmanager.extra_appwidget_ids, ids1);     sendbroadcast(intent1);     this.finish(); } 

please me out of this. how update both widgets when press button or when main activity created?