如何在选项卡处于选中状态时更改TabLayout.Tab图标？

TabLayout tabLayout = findViewById(R.id.tab_layout);
TabLayout.Tab tab = tabLayout.getTabAt(position); // position为选项卡的位置
tab.setCustomView(R.layout.tab_custom);

tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
    @Override
    public void onTabSelected(TabLayout.Tab tab) {
        // 选中状态
        ImageView icon = tab.getCustomView().findViewById(R.id.tab_icon);
        icon.setImageResource(R.drawable.selected_icon);
    }

    @Override
    public void onTabUnselected(TabLayout.Tab tab) {
        // 未选中状态
        ImageView icon = tab.getCustomView().findViewById(R.id.tab_icon);
        icon.setImageResource(R.drawable.unselected_icon);
    }

    @Override
    public void onTabReselected(TabLayout.Tab tab) {
        // 重新选中状态
    }
});