[android help] Android: Items in lists not turning orange when clicked?

I have a ListView in my app's code, which when clicked uses an AdapterView.OnItemClickListener to detect clicks. The problem is, when I click on an item , that item's background turns to white, instead of the default orange. Like this:

Also, when I dont use AdapterView, the clicked items turn orange without any problem. How do I make the clicked item's background orange again?

EDIT:

layout of list: main.xml

    
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" 
    android:background="#00000000">


        

                    android:layout_height="fill_parent"
            android:textSize="15px"
            android:layout_width="fill_parent"
            android:background="#00000000">
        

onCreate():

public void onCreate(Bundle savedInstanceState) {try{
    super.onCreate(savedInstanceState);


    setContentView(R.layout.main);
    lv= (ListView)findViewById(R.id.listview);
    lv.setBackgroundColor(Color.TRANSPARENT);
    lv.setCacheColorHint(Color.TRANSPARENT);
    //......calculations
    for(int q = 0; q         HashMap map = new HashMap();
        map.put("col_1", array[q]);
        fillMaps.add(map);
        lv.setOnItemClickListener(onListClick);
    }
    //......calculations
    }

AdapterView:

private AdapterView.OnItemClickListener onListClick=new AdapterView.OnItemClickListener(){

public void onItemClick(AdapterView parent,View view, int position, long id)
{

lv.setBackgroundColor(Color.TRANSPARENT);
lv.setCacheColorHint(Color.TRANSPARENT);
//.....calculations
}

Custom theme being used:

.

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