Android : Select a Text-view from a selected List Item

mListView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // TODO Auto-generated method stub
                View vie = (View)parent.getParent();  
                TextView tv = (TextView) vie.findViewById(R.id.tv_id);
                String genus = (String) tv.getText();
            Toast.makeText(getBaseContext(),genus+"--"+id , Toast.LENGTH_SHORT).show(); 

            }
        });

        return adapter;
    }

every time it is returning same value for every item. here is my list items.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView 
        android:id="@+id/tv_country"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"        
        android:textSize="20dp"   
        android:textStyle="bold" />

    <ImageView 
        android:id="@+id/iv_flag"
        android:layout_width="100dip"
        android:layout_height="100dip"
        android:layout_below="@id/tv_country"
        android:layout_centerVertical="true"
        android:padding="5dp"
       />

    <TextView 
        android:id="@+id/tv_country_details"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/iv_flag"
        android:layout_below="@id/tv_country"  />
     <TextView 
        android:id="@+id/tv_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/tv_country_details" 
       />          
 </RelativeLayout>

here is my view file. please help me guys. i hav spend a lot of time searching for solutions.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >    


<ListView
    android:id="@+id/lv_countries"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    tools:context=".NearbyGymList" />
<Button android:id="@+id/btnNoResults"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/lv_countries"
            android:text="No More Results"/>