如何用Java在Android GridLayout中设置间距？

<GridLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/gridLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button 1" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button 2" />

    <!-- 添加更多子视图 -->

</GridLayout>

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

// 设置内边距
int padding = getResources().getDimensionPixelSize(R.dimen.grid_padding);
gridLayout.setPadding(padding, padding, padding, padding);

// 设置列间距
int columnSpacing = getResources().getDimensionPixelSize(R.dimen.grid_column_spacing);
gridLayout.setColumnSpacing(columnSpacing);

// 设置行间距
int rowSpacing = getResources().getDimensionPixelSize(R.dimen.grid_row_spacing);
gridLayout.setRowSpacing(rowSpacing);

<dimen name="grid_padding">16dp</dimen>
<dimen name="grid_column_spacing">8dp</dimen>
<dimen name="grid_row_spacing">8dp</dimen>