Android ListView adapter doesnt show items properly -

below listview adapter doesnt show items when click item jump next activity , come after. data received database.

public class cropselectionactivity extends activity implements         android.widget.adapterview.onitemclicklistener {      private static final string tag = cropselectionactivity.class.getname();     private static cropsadapter listadapter;     private static listview listview;     public static string selectedcrop = null;     private static pendingintent pendingintent;     private static alarmmanager alarmmanager;     private static pendingintent pendingintent1;     private static alarmmanager alarmmanager1;     private static final long syncalaramintervel = 15 * 60 * 1000;     private static final long deletionintervel = 15 * 60 * 1000;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.displaypoints);         getwindow().setflags(windowmanager.layoutparams.flag_fullscreen,windowmanager.layoutparams.flag_fullscreen);         log.i(tag, "----oncreate()-----");         firealarm();         final string details[] = dalaccesslayer.getusermailandid(cropselectionactivity.this);         actionbar actionbar = getactionbar();         actionbar.settitle("esap expert"+"("+details[1]+")");         actionbar.sethomebuttonenabled(true);          strictmode.setthreadpolicy(new strictmode.threadpolicy.builder()                 .detectdiskreads()                 .detectdiskwrites()                 .detectnetwork()   // or .detectall() detectable problems                 .penaltylog()                 .build());          strictmode.setvmpolicy(new strictmode.vmpolicy.builder()                 .penaltylog()                 .penaltydeath()                 .build());         listview = (listview) findviewbyid(r.id.list);         listview.setonitemclicklistener(this);         listadapter = new cropsadapter(this,r.layout.listview);     }     @override     protected void onpostresume() {         super.onpostresume();          map<string, integer> list = dalaccesslayer.getcrops(getapplicationcontext(), databaseconstantsstring.status_unresolve.getvalue(), "0");         int pointscount = 0;         (string key : list.keyset()) {             croppojo cp = new croppojo();             cp.setcropname(key);             pointscount = pointscount+list.get(key);             log.i(tag, "pointscount ="+pointscount);             cp.setcount(list.get(key));             listadapter.add(cp);         }         listview.setadapter(listadapter);         log.i(tag, "number of existing points ="+pointscount);     }      @override     protected void ondestroy() {         super.ondestroy();         listadapter.clear();         listview.setadapter(listadapter);     }      @override     public void onitemclick(adapterview<?> parent, view view, int position,                             long id) {         croppojo cp = (croppojo) listview.getitematposition(position);         selectedcrop = cp.getcropname();         intent intent = new intent(this, displaypoints.class);         startactivity(intent);     }      @override     public void onbackpressed() {     }       @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.mainmenu, menu);         return true;     }     @override     public boolean onoptionsitemselected(menuitem item){          switch (item.getitemid()){              case r.id.logout:                 intent = new intent(getapplicationcontext(),mainactivity.class);                 i.addflags(intent.flag_activity_clear_top);                 i.addflags(intent.flag_activity_new_task);                 startactivity(i);                 return true;              case r.id.refresh:                 startservice(new intent(getapplicationcontext(), myservice.class));                 return true;              case r.id.getexpertporfile:                 communicationhandler.getexpertprofile(getapplicationcontext());                 return true;              default:                 return super.onoptionsitemselected(item);         }     } 

public class cropsadapter extends arrayadapter<croppojo>{    	private int textviewresourceid;  	  	public cropsadapter(context context, int textviewresourceid) {  		super(context, textviewresourceid);  		this.textviewresourceid = textviewresourceid;  	}    	@override  	public view getview(int position, view convertview, viewgroup parent) {  		final view view = getworkingview(convertview);  		final viewholder viewholder = getviewholder(view);  		final croppojo croppojo = getitem(position);  		viewholder.titleview.settext(croppojo.getcropname());  		viewholder.locationview.settext(string.valueof(croppojo.getcount()));  		return view;  	}    	private view getworkingview(final view convertview) {  		// workingview convertview re-used if possible  		// or inflated new if not possible  		view workingview = null;  		  		if(null == convertview) {  			final context context = getcontext();  			final layoutinflater inflater = (layoutinflater)context.getsystemservice  		      (context.layout_inflater_service);  			  			workingview = inflater.inflate(textviewresourceid, null);  		} else {  			workingview = convertview;  		}  		return workingview;  	}  	  	private viewholder getviewholder(final view workingview) {  		// viewholder allows avoid re-looking view references  		// since views recycled, these references never change  		final object tag = workingview.gettag();  		viewholder viewholder = null;  		  		  		if(null == tag || !(tag instanceof viewholder)) {  			viewholder = new viewholder();  			  			viewholder.titleview = (textview) workingview.findviewbyid(r.id.firstline);  			viewholder.locationview = (textview) workingview.findviewbyid(r.id.location);  			  			workingview.settag(viewholder);  			  		} else {  			viewholder = (viewholder) tag;  		}  		  		return viewholder;  	}  	  	/**  	 * viewholder allows avoid re-looking view references  	 * since views recycled, these references never change  	 */  	private static class viewholder {  		public textview titleview;  		public textview locationview;  	}    	  }