Set style programmatically doesn't work

This is the complex view code I wrote. It uses android.support.v7.widget.CardView as parent class:

public class ItemListItem extends CardView {

    TextView tvName;
    ImageView ivIcon;

    public ItemListItem(Context context) {
        super(context, null, R.style.GreenCardView);
        LayoutInflater.from(context).inflate(R.layout.item_list_item, this, true);
        tvName = (TextView) findViewById(R.id.tvName);
        ivIcon = (ImageView) findViewById(R.id.ivIcon);
    }

    public void setItem(Item item)
    {
        tvName.setText(item.getName());
    }
}

      

        
        
        
      

    

Although I add a custom style (R.style.GreenCardView) to the super-constructor call on line 7, it initializes every instance of that class with the default white style. Why is this so?

edit: style

<style name="GreenCardView" parent="CardView.Dark">
    <item name="contentPadding">@dimen/default_margin</item>
    <item name="cardBackgroundColor">@color/guiColor</item>
    <item name="cardElevation">@dimen/cardElevation</item>
    <item name="cardCornerRadius">@dimen/cardCornerRadius</item>
    <item name="android:foreground">?android:attr/selectableItemBackground</item>
</style>