在Android Studio中創建Activity會自動生成onOptionsItemSelected方法，請問老師，在方法體的那個if判斷句是什么意思呢？這個方法返回的布爾值又代表了什么呢？（代碼見下）

@Override
public?boolean?onOptionsItemSelected(MenuItem?item)?{
????//?Handle?action?bar?item?clicks?here.?The?action?bar?will
????//?automatically?handle?clicks?on?the?Home/Up?button,?so?long
????//?as?you?specify?a?parent?activity?in?AndroidManifest.xml.
????int?id?=?item.getItemId();

????//noinspection?SimplifiableIfStatement
????if?(id?==?R.id.action_settings)?{
????????return?true;
????}

????return?super.onOptionsItemSelected(item);
}

求解答；