android - Navigation drawer: How do I set the selected item at startup? -

my code works perfectly: every time item in navigation drawer clicked item selected.

of course want start app default fragment (home), navigation drawer doesn't have item selected. how can select item programmatically?

public class baseapp extends appcompatactivity {      //defining variables     protected string logtag = "logdebug";     protected toolbar toolbar;     protected navigationview navigationview;     protected drawerlayout drawerlayout;      private datemanager db = null;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.base_layout);          navigationview = (navigationview) findviewbyid(r.id.navigation_view);           // set home/dashboard @ startup          fragmenttransaction fragmenttransaction = getsupportfragmentmanager().begintransaction();         fragmenttransaction.replace(r.id.frame, new dashboardfragment());         fragmenttransaction.commit();          setnavdrawer();     }      private void setnavdrawer(){          // initializing toolbar , setting actionbar         toolbar = (toolbar) findviewbyid(r.id.toolbar);         setsupportactionbar(toolbar);          //initializing navigationview          //setting navigation view item selected listener handle item click of navigation menu         navigationview.setnavigationitemselectedlistener(new navigationview.onnavigationitemselectedlistener() {              // method trigger on item click of navigation menu             @override             public boolean onnavigationitemselected(menuitem menuitem) {                   //checking if item in checked state or not, if not make in checked state                  // think need edit here...                  if (menuitem.ischecked()) menuitem.setchecked(false);                 else menuitem.setchecked(true);                  //closing drawer on item click                 drawerlayout.closedrawers();                   //check see item being clicked , perform appropriate action                 switch (menuitem.getitemid()) {                          //replacing main content contentfragment                       case r.id.home:                          dashboardfragment dashboardfragment = new dashboardfragment();                         fragmenttransaction fragmenttransaction = getsupportfragmentmanager().begintransaction();                         fragmenttransaction.replace(r.id.frame, dashboardfragment,"dashboard_fragment");                         fragmenttransaction.commit();                         return true; [...] 

i think need edit here:

if (menuitem.ischecked()) menuitem.setchecked(false);                     else menuitem.setchecked(true); 

or in oncreate @ app startup fragmenttransaction.

thank support.

use code below:

navigationview.getmenu().getitem(0).setchecked(true); 

call method after call setnavdrawer();

the getitem(int index) method gets menuitem can call setchecked(true); on menuitem, left find out element index default have, , replace 0 index.

you can select(highlight) item calling

onnavigationitemselected(navigationview.getmenu().getitem(0)); 

here reference link: http://thegeekyland.blogspot.com/2015/11/navigation-drawer-how-set-selected-item.html

edit did not work on nexus 4, support library revision 24.0.0. recommend use

navigationview.setcheckeditem(r.id.nav_item);

answered @kingston below.