Android – ListView Rows with Different Layouts

What I am trying to achieve is to have different layouts for each row. The code in my ArrayAdapter is as follows:

@Override
    public int getCount() {
        return contentList.size();
    }

    @Override
    public MyContents getItem(int position) {
        return content.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public int getViewTypeCount() {
        // TODO Auto-generated method stub
        return 2;
    }

    @Override
    public int getItemViewType(int position) {
        // TODO Auto-generated method stub
        return super.getItemViewType(position);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final MyContents entry = content.get(position);

        View row = convertView;
        LayoutInflater inflater = null;
        boolean _haschild_ = entry.testBoolean();
        if (row == null) {
            if (entry.testBoolean()) {
                inflater = (LayoutInflater) context
                        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                row = inflater
                        .inflate(R.layout.contents_layout, null);
            } else {
                inflater = (LayoutInflater) context
                        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                row = inflater.inflate(R.layout.test_layout, null);
            }
        } 

        if (entry.testBoolean()) {
            TextView txtView = (TextView) row
                    .findViewById(R.id.txtView);
            //.....
        } else {
            ((TextView) row.findViewById(R.id.txtView_test)) //**LOE**
                    .setText("test: " + position); //**LOE**
        }


        return row;
    }

The layout file for *test_layout.xml*:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_test"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_margin="12dp"
    android:background="@color/grey_five"
    android:orientation="vertical"
    android:padding="@dimen/padding_small" >

    <TextView
        android:id="@+id/txtView_test"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:text="@string/lorem__ipsum"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textColor="@color/grey" />


</RelativeLayout>

But whenever I execute it throws a NullPointerException(check the line with the comment //LOE).

Any suggestion what to do? I am struggling with it for past one day.