listview - Android Custom SimpleAdapter Background Color -

i have been trying implement getting listview item background color change based on state using custom simpleadapter. following code references found here , on other sites. have partially working, not completely.

first, code:
the xml over-all gui containing listview:

<?xml version="1.0" encoding="utf-8"?>     <relativelayout       android:id="@+id/widget37"       android:layout_width="fill_parent"       android:layout_height="fill_parent"       android:background="#ffffffff"       xmlns:android="http://schemas.android.com/apk/res/android"     >  <progressbar     android:id="@+id/progressbar"     style="?android:attr/progressbarstylelarge"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_centerhorizontal="true"     android:layout_centervertical="true" />  <textview     android:id="@+id/textviewmessage"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparentleft="true"     android:layout_alignparenttop="true"     android:layout_marginleft="10dp"     android:layout_margintop="10dp"     android:text="building list..."     android:textappearance="?android:attr/textappearancemedium"     android:textcolor="#ff000000"     android:textsize="22sp" />  <relativelayout     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignbaseline="@+id/textviewmessage"     android:layout_alignparentleft="true"     android:layout_margintop="20dp">      <listview         android:id="@id/listlocations"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_margintop="20dp"         android:layout_marginleft="10dp"         android:cachecolorhint="#00000000"         android:choicemode="singlechoice"         android:clickable="true"         android:scrollingcache="false"         android:background="@color/transparent"         android:listselector="@drawable/listitem_selector">     </listview> </relativelayout>  <button     android:id="@+id/buttontryagain"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparentright="true"     android:layout_alignparenttop="true"     android:text="try again" /> 

based on other postings, notice using listitem_selector background listview individual items can reflect state in different colors.

next xml listitem_selector:

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android">   <item android:state_selected="true" android:drawable="@color/itemselected" />   <item android:state_pressed="true" android:drawable="@color/itempressed" />  <item android:drawable="@color/text_white" /> 

here 'wrinkle' due fact each item comprised of 4 textboxes - adapter built utilize layout list_parkers_tmp

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="60dp" android:background="@drawable/listitem_selector">  <imageview     android:id="@+id/logo"     android:layout_width="40dp"     android:layout_height="50dp"     android:layout_alignparentleft="true"     android:layout_alignparenttop="true"     android:src="@drawable/hangtag" />  <textview     android:id="@+id/textviewpermit"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparenttop="true"     android:layout_torightof="@+id/logo"     android:text="permit number"     android:textstyle="bold"     android:textcolor="#ff00aa00"     android:textsize="22dp" />  <textview     android:id="@+id/textviewcategory"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparenttop="true"     android:layout_torightof="@+id/textviewpermit"     android:paddingleft="10dp"     android:text="category"     android:textcolor="#ff555555"     android:textsize="16dp" />  <textview     android:id="@+id/textviewcars"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignbottom="@+id/logo"     android:layout_alignparentright="true"     android:layout_torightof="@+id/logo"     android:text="textview"     android:textcolor="#ff000000"     android:textsize="18dp" />  <textview     android:id="@+id/textstatus"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparentright="true"     android:layout_alignparenttop="true"     android:paddingleft="10dp"     android:text="status"     android:textstyle="bold"             android:textcolor="#ff0000"     android:textsize="16dp" /> 

code within activity:

// create our selectedadapter selectedadapter = new selectedadapter(getbasecontext(), itemlist, r.layout.list_parkers_tmp,      new string[]{"permit", "status", "category", "cars"},      new int[]{r.id.textviewpermit, r.id.textstatus, r.id.textviewcategory, r.id.textviewcars}); selectedadapter.notifydatasetchanged(); listlocations.setadapter(selectedadapter); 

and custom simpleadapter:

public class selectedadapter extends simpleadapter { private int[] mto; private string[] mfrom; private viewbinder mviewbinder; private list<? extends map<string, ?>> mdata; private int mresource; private int mdropdownresource; private layoutinflater minflater;  public selectedadapter(context context,                        list<? extends map<string, string>> data, int resource, string[] from,                        int[] to) {     super(context, data, resource, from, to);     mdata = data;     mresource = mdropdownresource = resource;     mfrom = from;     mto = to;     minflater = (layoutinflater) context.getsystemservice(context.layout_inflater_service); }  /**  * @see android.widget.adapter#getview(int, view, viewgroup)  */  // used keep selected position in listview private int selectedpos = -1;    // init value not-selected  public void setselectedposition(int pos) {     selectedpos = pos;     // inform view of change     notifydatasetchanged(); }  public int getselectedposition() {     return selectedpos; }  @override public long getitemid(int position) {     return position; }  @override public view getview(int position, view convertview, viewgroup parent) {     //view v = convertview;     view v = super.getview(position, convertview, parent);      // inflate view if it's null     if (v == null) {         layoutinflater vi = (layoutinflater) config.context.getsystemservice(context.layout_inflater_service);         //layoutinflater vi         //        = (layoutinflater) this.getcontext().getsystemservice(context.layout_inflater_service);         v = vi.inflate(r.layout.list_parkers_tmp, null);     }      // text view     string textviewstr = "";     string categorytext = "";     textviewstr = this.getitem(position).tostring();   // of listview item's text values      textview viewpermit = (textview) v.findviewbyid(r.id.textviewpermit);     categorytext = parseitemstr(textviewstr,"permit=","");     viewpermit.settext(categorytext);      textview status = (textview) v.findviewbyid(r.id.textstatus);     categorytext = parseitemstr(textviewstr,"status=","cars=");     status.settext(categorytext);      textview viewcategory = (textview) v.findviewbyid(r.id.textviewcategory);     categorytext = parseitemstr(textviewstr,"category=","permit=");     viewcategory.settext(categorytext);      textview viewcars = (textview) v.findviewbyid(r.id.textviewcars);     categorytext = parseitemstr(textviewstr,"cars=","category=");     viewcars.settext(categorytext);      // change row color based on selected state     if (selectedpos == position) {         v.setselected(true);         v.setpressed(true);         v.setbackgroundcolor(r.color.amber_800);     } else {         v.setselected(false);         v.setpressed(false);         v.setbackgroundcolor(r.color.text_white);     }      /*     // use other .tostring()     myclass myobj = (myclass)this.getitem(position);     label.settext(myobj.myreturnsstring());     */     return (v); }  public string parseitemstr (string itemstr, string category1, string category2) {     itemstr = itemstr.replace("}","");     itemstr = itemstr.replace("{","");     int loc1 = itemstr.indexof((category1));     int loc2 = 0;     if (!category2.equals("")) {         loc2 = itemstr.indexof((category2));     } else {         loc2 = itemstr.length();     }     string shortstr = itemstr.substring(loc1,loc2);     shortstr = shortstr.replace(category1,"").trim();     int len = shortstr.length();     if (len > 0){         if (shortstr.substring(len-1,len).equals(",")) {             shortstr = shortstr.substring(0,math.max(0,len-1));         }     }      return shortstr; } 

}

i can watch code execute , getview() executes expected.

first, when listview created (no specific item selected), individual item's background color not transparent expected, gray. that's not right.

then, when item selected getview() code portion selectedpos == position executes intended.
no background color change results it.

have totally messed things or have missed few things?

try using setactivated.

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android">     <item android:state_activated="true" android:drawable="@color/amber_800" />     <item android:state_pressed="true" android:drawable="@color/itempressed" />     <item android:drawable="@color/transparent" /> </selector> 

then activate , deactivate

// change row color based on selected state if (selectedpos == position) {     v.setactivated(true); } else {     v.setactivated(false); }