for循环修改GridLayout子控件layoutParams参数

可以使用以下代码来修改GridLayout子控件的LayoutParams参数：

GridLayout gridLayout = (GridLayout) findViewById(R.id.grid_layout);
for (int i = 0; i < gridLayout.getChildCount(); i++) {
    View child = gridLayout.getChildAt(i);
    GridLayout.LayoutParams layoutParams = (GridLayout.LayoutParams) child.getLayoutParams();
    layoutParams.width = 100;
    layoutParams.height = 100;
    layoutParams.setGravity(Gravity.CENTER);
    layoutParams.columnSpec = GridLayout.spec(GridLayout.UNDEFINED, 1f);
    layoutParams.rowSpec = GridLayout.spec(GridLayout.UNDEFINED, 1f);
    child.setLayoutParams(layoutParams);
}

在循环中，我们首先获取GridLayout的子控件对象，然后获取它的LayoutParams对象，并修改其中的属性值，最后将修改后的LayoutParams对象重新设置给子控件。以上代码中，我们将子控件的宽高都设置为了100，重心设置为居中，列和行都设置为了均分。您可以根据实际需求修改这些属性的值。