Spinner with custom layout doesn't show nothing Android -

in application must use spinner should show 3 items (it,en,pr). must use personalized layout. code in adapter in oncreate method:

holder.spinnerlenguage = (spinner) convertview                 .findviewbyid(r.id.spinnerlenguage);         arraylist<string> spinnerarray = new arraylist<string>();         spinnerarray.add("it");         spinnerarray.add("en");         spinnerarray.add("pr");         final lenguagespinneradapter lenguageadapter = new lenguagespinneradapter(                 convertview.getcontext(), spinnerarray);         holder.spinnerlenguage.setadapter(lenguageadapter);          holder.spinnerlenguage                 .setonitemselectedlistener(new onitemselectedlistener() ... ... 

the adapter class is:

private class lenguagespinneradapter extends arrayadapter<string> implements         spinneradapter {      private arraylist<string> lenguages;      public lenguagespinneradapter(context context,             arraylist<string> lenguages) {         super(context, r.layout.lenguage_item_layout);         this.lenguages = lenguages;     }      @override     public view getdropdownview(int position, view convertview,             viewgroup parent) {         // first let's verify convertview not null         if (convertview == null) {             // new view inflate new layout             layoutinflater inflater = (layoutinflater) context                     .getsystemservice(context.layout_inflater_service);             convertview = inflater.inflate(r.layout.lenguage_item_layout,                     parent, false);         }          textview lenguage = (textview) convertview                 .findviewbyid(r.id.textviewlenguage);         lenguage.settext(lenguages.get(position).tostring());          return convertview;      }  } 

edit: getcount error is:

07-11 11:09:20.222: e/androidruntime(32564): fatal exception: main 07-11 11:09:20.222: e/androidruntime(32564): java.lang.runtimeexception: unable start activity componentinfo{com.app/com.app.flipmainactivity}: java.lang.illegalstateexception: arrayadapter requires resource id textview 07-11 11:09:20.222: e/androidruntime(32564):    @ android.app.activitythread.performlaunchactivity(activitythread.java:2247) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.app.activitythread.handlelaunchactivity(activitythread.java:2297) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.app.activitythread.access$700(activitythread.java:152) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.app.activitythread$h.handlemessage(activitythread.java:1282) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.os.handler.dispatchmessage(handler.java:99) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.os.looper.loop(looper.java:137) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.app.activitythread.main(activitythread.java:5328) 07-11 11:09:20.222: e/androidruntime(32564):    @ java.lang.reflect.method.invokenative(native method) 07-11 11:09:20.222: e/androidruntime(32564):    @ java.lang.reflect.method.invoke(method.java:511) 07-11 11:09:20.222: e/androidruntime(32564):    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:1102) 07-11 11:09:20.222: e/androidruntime(32564):    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:869) 07-11 11:09:20.222: e/androidruntime(32564):    @ dalvik.system.nativestart.main(native method) 07-11 11:09:20.222: e/androidruntime(32564): caused by: java.lang.illegalstateexception: arrayadapter requires resource id textview 07-11 11:09:20.222: e/androidruntime(32564):    @ android.widget.arrayadapter.createviewfromresource(arrayadapter.java:386) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.widget.arrayadapter.getview(arrayadapter.java:362) 07-11 11:09:20.222: e/androidruntime(32564):     07-11 11:09:20.222: e/androidruntime(32564):    @ android.widget.spinner.onmeasure(spinner.java:443) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.view.view.measure(view.java:16059) 071 11:09:20.222: e/androidruntime(32564):  @ android.widget.relativelayout.measurechildhorizontal(relativelayout.java:681) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.widget.relativelayout.onmeasure(relativelayout.java:461) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.view.view.measure(view.java:16059) 07-11 11:09:20.222: e/androidruntime(32564):    @ android.widget.relativelayout.measurechildhorizontal(relativelayout.java:681) ... ... 07-11 11:09:20.222: e/androidruntime(32564): caused by: java.lang.classcastexception: android.widget.relativelayout cannot cast android.widget.textview 07-11 11:09:20.222: e/androidruntime(32564):    @ android.widget.arrayadapter.createviewfromresource(arrayadapter.java:379) 07-11 11:09:20.222: e/androidruntime(32564):    ... 29 more 

the spinner draw in layout there no items. ideas?

try implement following code instead of one.

private class lenguagespinneradapter extends baseadapter implements         spinneradapter {      private arraylist<string> lenguages;      public lenguagespinneradapter(context context,             arraylist<string> lenguages) {         this.lenguages = lenguages;     }      public int getcount() {         return lenguages.size();     }      public object getitem(int position) {         return lenguages.get(position);     }      public long getitemid(int position) {         return position;     }      public view getview(int position, view convertview, viewgroup parent) {         if (convertview == null) {             // new view inflate new layout             layoutinflater inflater = (layoutinflater) getapplicationcontext()                     .getsystemservice(context.layout_inflater_service);             convertview = inflater.inflate(r.layout.get_exercise_activity,                     parent, false);         }          textview lenguage = (textview) convertview                 .findviewbyid(r.id.btnsave);         lenguage.settext(lenguages.get(position).tostring());          return convertview;     }  }