java - ListView items not changing text colour -

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i've used colouring adapter change text colour of list view items after debugging app crashes , error don't know how fix. know problem lies line 77 reason not clear me. ideas on how rectify this?

    package com.apptacularapps.exitsexpertlondonlite;  import android.content.context; import android.os.bundle; import android.support.v7.app.actionbaractivity; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.adapterview; import android.widget.arrayadapter; import android.widget.listview; import android.widget.textview;   public class stationchooseractivity extends actionbaractivity {      listview list_linechooser;      string[] listcontent = {             "bakerloo line", "central line", "circle line",             "district line", "hammersmith & city line",             "jubilee line", "metropolitan line",             "northern line", "piccadilly line",             "victoria line", "waterloo & city line",             "docklands light railway", "london overground",             "tramlink"     };      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_stationchooser);           list_linechooser = (listview)findviewbyid(r.id.list_linechooser);         mycoloringadapter adapter = new mycoloringadapter(this,listcontent);         list_linechooser.setadapter(adapter);     }      private class mycoloringadapter extends arrayadapter<string> {         private final context context;         private final string[] values;          public mycoloringadapter(context context, string[] values) {             super(context, r.layout.list_item, values);             this.context = context;             this.values = values;         }          @override         public view getview(int position, view convertview, viewgroup parent) {             layoutinflater inflater = (layoutinflater) context                     .getsystemservice(context.layout_inflater_service);             view rowview = inflater.inflate(r.layout.list_item, parent, false);             textview textview = (textview) rowview.findviewbyid(r.id.list_item);             // set text             textview.settext(values[position]);             // set color depending on position             int textcolorid = r.color.white; // default color             switch (position) {                 case 0:                     textcolorid = r.color.bakerloo; break;                 case 1:                     textcolorid = r.color.central; break;                 case 2:                     textcolorid = r.color.circle; break;                 case 3:                     textcolorid = r.color.district; break;                 case 4:                     textcolorid = r.color.hc; break;                 case 5:                     textcolorid = r.color.jubilee; break;                 case 6:                     textcolorid = r.color.metropolitan; break;                 case 7:                     textcolorid = r.color.white; break;                 case 8:                     textcolorid = r.color.piccadilly; break;                 case 9:                     textcolorid = r.color.victoria; break;                 case 10:                     textcolorid = r.color.wc; break;                 case 11:                     textcolorid = r.color.dlr; break;                 case 12:                     textcolorid = r.color.overground; break;                 case 13:                     textcolorid = r.color.tramlink; break;             }             textview.settextcolor(getresources().getcolor(textcolorid));             return rowview;         }     } }

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your list item layout file name list_item think not giving correct id textview. here

textview textview = (textview) rowview.findviewbyid(r.id.list_item);

make double sure text view id in xml file list_item (i dont think so). in case change correct id , work hopefully.


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