android - Show Edit text on spinner item selected -

i have spinner in class items. have display edittext visibility have set "invisible". need show edittext when "others" item selected in spinner.

here code:-

activity class:-              protected void oncreate(bundle savedinstancestate)                  {                     // todo auto-generated method stub                     super.oncreate(savedinstancestate);                     requestwindowfeature(window.feature_no_title);                     setcontentview(r.layout.maintenance);                      etservicestation = (edittext)findviewbyid(r.id.etservicestation);                     etservicetype = (edittext)findviewbyid(r.id.etservicetype);                     etservicecost= (edittext)findviewbyid(r.id.etservicecost);                      spinservicetype = (spinner)findviewbyid(r.id.spinservicetype);                     btnmaintenencesave= (imagebutton)findviewbyid(r.id.btnmaintenencesave);                     btnmaintenanceclear = (imagebutton)findviewbyid(r.id.btnmaintenenceclear);                      spinservicetype.setonitemselectedlistener(this);                      btnmaintenanceclear.setonclicklistener(this);                     btnmaintenencesave.setonclicklistener(this);                  arrayadapter<string> servicetypeadapter = new arrayadapter<string>(getapplicationcontext(), r.array.service_type_array, android.r.layout.simple_spinner_item);                 servicetypeadapter.setdropdownviewresource(android.r.layout.simple_spinner_dropdown_item);                 spinservicetype.setadapter(servicetypeadapter);                   }        public void onitemselected(adapterview<?> parent, view view, int servicepos, long id)      {         // todo auto-generated method stub         spinnerservicetype = spinservicetype.getitematposition(servicepos).tostring();           if(spinnerservicetype.matches("others"))         {             etservicetype = (edittext)findviewbyid(r.id.etservicetype);             etservicetype.setvisibility(view.visible);             spinnerservicetype = etservicetype.gettext().tostring();             }         servicetype = spinnerservicetype;     }         }        resource:-          <?xml version="1.0" encoding="utf-8"?>         <resources>             <string-array name="service_type_array">                 <item>full service</item>                 <item value="serviceother">other</item>              </string-array>         </resources>          maintenance.xml          <?xml version="1.0" encoding="utf-8"?>         <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"             android:layout_width="match_parent"             android:layout_height="match_parent"             android:orientation="vertical"              android:padding="30dp">              <textview                 android:id="@+id/txtmtitle"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="maintenance"                 android:layout_gravity="center_horizontal"                 android:textsize="25sp"                  android:textcolor="@color/steelblue"                 android:typeface="sans"/>               <textview                 android:layout_margintop="60dp"                 android:id="@+id/txtservicestation"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="service station name:" />              <edittext                 android:id="@+id/etservicestation"                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:ems="10" >                  <requestfocus />             </edittext>              <textview                 android:id="@+id/txtservicetype"                 android:layout_margintop="10dp"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="service type: "/>              <spinner                 android:id="@+id/spinservicetype"                 android:layout_margintop="10dp"                 android:layout_width="fill_parent"                 android:layout_height="wrap_content" />              <edittext                 android:id="@+id/etservicetype"                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:inputtype="numberdecimal"                 android:visibility="invisible"                 android:ems="10" />              <textview                 android:id="@+id/txtservicecost"                 android:layout_margintop="10dp"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="servicing expence:" />              <edittext                 android:id="@+id/etservicecost"                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:inputtype="numberdecimal"                 android:ems="10" />                      <linearlayout                             android:layout_width="match_parent"                             android:layout_height="wrap_content"                             android:layout_margintop="40dp"                             android:layout_marginleft="50dp"                             android:orientation="horizontal">                                 <imagebutton                                          android:id="@+id/btnmaintenencesave"                                          android:layout_width="wrap_content"                                          android:layout_height="wrap_content"                                          android:background="@color/white"                                          android:src="@drawable/fuelbtnsaveclick" />                                  <imagebutton                                     android:id="@+id/btnmaintenenceclear"                                     android:layout_width="wrap_content"                                     android:layout_height="wrap_content"                                     android:layout_marginleft="20dp"                                     android:background="@color/white"                                     android:src="@drawable/fuelbtnclearclick" />                      </linearlayout>         </linearlayout>           database:         public long createmainentry(maintenanceexpense me)     {         contentvalues mcv = new contentvalues();         mcv.put(key_service_station,me.getservicestation());         mcv.put(key_service_type,me.getservicetype());         mcv.put(key_service_cost,me.getservicecost());         return otherinfodatabase.insert(maintenance_database_table, null, mcv);     } 

i have display etservicetype when "others" item clicked. help.

     public void onitemselected(adapterview<?> parent, view view, int position, long id)          {             // todo auto-generated method stub              spinnerservicetype = spinservicetype.getitematposition(position).tostring();             //if spinnerservicetype 's value other //then set visibility of textview visible put text watcher on u can text when user finished ..if u dont want u can use simple gettext change visibility //as u setting array value resource cant update programmatically //so first of u have take array items in list . u can update list after user enter value in edit text           }