<LinearLayout android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/mainContent"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <TextView
        android:id="@+id/traveller_data_title"
        android:layout_width="fill_parent"
        android:layout_height="70dp"
        android:gravity="center_vertical"
        android:layout_weight="1"
        android:textAlignment="center"
        android:paddingLeft="5dp"
        android:textSize="17dp"
        android:textColor="#0c333f"
        android:singleLine="true"
        />
    </LinearLayout>

<LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/traveller_data_content"
        xmlns:android="http://schemas.android.com/apk/res/android">

// rest of my layout elments here

</LinearLayout>

View childView =getChildView(groupPos,childPos)