Set rowSpan or colSpan of a child of a GridLayout programmatically?

I have a GridLayout with 5 columns and 3 rows. Now I can insert arbitrary child views, which is great. Even better is, that I can assign columnSpan=2 to some item in order to span it to 2 columns (the same with rowSpan).

The problem now is, that I cannot assign rowSpan or columnSpan programmatically (i.e. at runtime). Some search suggested something like this:

layoutParams.columnSpec = GridLayout.spec(0, columnSpan);

But I don't quite understand what the parameters of spec mean (start and size). The documentation is also quite poor at this point.

Any help is highly appreciated!

    GridLayout gridLayout = (GridLayout)findViewById(R.id.tableGrid);

    gridLayout.removeAllViews();

    int total = 12;
    int column = 5;
    int row = total / column;
    gridLayout.setColumnCount(column);
    gridLayout.setRowCount(row + 1);
    for(int i =0, c = 0, r = 0; i < total; i++, c++)
    {
        if(c == column)
        {
            c = 0;
            r++;
        }
        ImageView oImageView = new ImageView(this);
        oImageView.setImageResource(R.drawable.ic_launcher);
        GridLayout.LayoutParams param =new GridLayout.LayoutParams();
        param.height = LayoutParams.WRAP_CONTENT;
        param.width = LayoutParams.WRAP_CONTENT;
        param.rightMargin = 5;
        param.topMargin = 5;
        param.setGravity(Gravity.CENTER);
        param.columnSpec = GridLayout.spec(c);
        param.rowSpec = GridLayout.spec(r);
        oImageView.setLayoutParams (param);
        gridLayout.addView(oImageView);
    }

How about this?

GridLayout.LayoutParams layoutParams = new GridLayout.LayoutParams();
layoutParams.rowSpec = GridLayout.spec(GridLayout.UNDEFINED, item.getRowSpan());
layoutParams.columnSpec = GridLayout.spec(GridLayout.UNDEFINED, item.getColumnSpan());

According to documentation, you should also call setLayoutParams on GridLayout IF you change column or row span AFTER the child views are inserted into GridLayout. You don't need this if you add them while setting span