android - Navigation Drawer shows error to the Java File when maps integrated -

i trying have navigation drawer, on of activity current location. when set code in drawer if statement error , doesnt give solution.

this mainactivity:

@suppresswarnings("statementwithemptybody") @override public boolean onnavigationitemselected(menuitem item) {     // handle navigation view item clicks here.     int id = item.getitemid();     fragmentmanager fragmentmanager = getfragmentmanager();       if (id == r.id.nav_home_layout)         fragmentmanager.begintransaction().replace(r.id.newframelayout, new mapsactivitytest()).commit();     else if (id == r.id.nav_earning_layout) {         fragmentmanager.begintransaction().replace(r.id.newframelayout, new earningactivity()).commit();     } else if (id == r.id.nav_campaign_layout) {         fragmentmanager.begintransaction().replace(r.id.newframelayout, new campaignactivity()).commit();     }  else if (id == r.id.nav_vehicle) {         fragmentmanager.begintransaction().replace(r.id.newframelayout, new vehicle()).commit();     }  else if (id == r.id.nav_alerts) {         fragmentmanager.begintransaction().replace(r.id.newframelayout, new alerts()).commit();     }  else if (id == r.id.nav_faqs) {         fragmentmanager.begintransaction().replace(r.id.newframelayout, new faqs()).commit();     }else if (id == r.id.nav_track_location) {      } else if (id == r.id.nav_send) {      }      drawerlayout drawer = (drawerlayout) findviewbyid(r.id.drawer_layout);     drawer.closedrawer(gravitycompat.start);     return true; } 

mapsactivitytest() class shows error on if statement.

this mapsactivitytest()

 public class mapsactivitytest extends fragment implements onmapreadycallback {  private googlemap mmap;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_maps_test);     // obtain supportmapfragment , notified when map ready used.     supportmapfragment mapfragment = (supportmapfragment) getsupportfragmentmanager()             .findfragmentbyid(r.id.map);     mapfragment.getmapasync(this); }  @override public void onmapready(googlemap googlemap) {     mmap = googlemap;      // add marker in sydney , move camera     latlng sydney = new latlng(-34, 151);     mmap.addmarker(new markeroptions().position(sydney).title("marker in sydney"));     mmap.movecamera(cameraupdatefactory.newlatlng(sydney)); } 

}