Android add Views inside a ListView

how can I add Views inside a LinearLayout in a ListView? I want to display some additional information inside the ListView and I want to add them in a for loop going through the items to add. Here's the code I currently have:

Activity:

<LinearLayout
        xmlns:android="http://ift.tt/nIICcg"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/layout"
        android:orientation="vertical" >

        <ListView
            android:id="@+id/list_view"
            android:layout_height="match_parent"
            android:layout_width="match_parent"
            android:scrollbars="vertical"
            android:layout_marginTop="0dp" />

</LinearLayout>

ListView:

<LinearLayout
    xmlns:android="http://ift.tt/nIICcg"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:paddingRight="?android:attr/scrollbarSize">

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="15dp"
        android:layout_marginEnd="6dp"
        android:layout_marginTop="6dp"
        android:layout_marginBottom="6dp">

        <TextView android:id="@+id/list_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@color/textColor"
            android:textSize="16sp"
            android:layout_alignParentLeft="true"/>

        <TextView android:id="@+id/list_title_summary"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@color/textColor"
            android:textSize="16sp"
            android:layout_alignParentLeft="true"/>


        <!-- VIEWS SHOULD BE ADDED HERE -->
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical">

        </LinearLayout>

    </RelativeLayout>

</LinearLayout>

Adapter:

public class ListViewAdapter extends ArrayAdapter<RowItem> {

    private final Context context;

    public ListViewAdapter(Context context, List<RowItem> items) {
        super(context,  R.layout.list_about, items);
        this.context = context;
    }

    private class ViewHolder {
        TextView txtTitle;
        TextView txtDesc;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        RowItem rowItem = getItem(position);

        LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.list, null);
            holder = new ViewHolder();
            holder.txtDesc = (TextView) convertView.findViewById(R.id.list_summary);
            holder.txtTitle = (TextView) convertView.findViewById(R.id.list_title);
            convertView.setTag(holder);
        } else
            holder = (ViewHolder) convertView.getTag();

        holder.txtDesc.setText(rowItem.getDesc());
        holder.txtTitle.setText(rowItem.getTitle());

        return convertView;
    }
}

RowItem:

public class RowItem {
    private final String title;
    private final String desc;

    public RowItem(String title, String desc) {
        this.title = title;
        this.desc = desc;
    }

    public String getDesc() {
        return desc;
    }

    public String getTitle() {
        return title;
    }

}

How can I add views inside the layout in the list? Each entry in the List should contain different views, so they can't all be the same