我在自定义Android设备上使用AdListener() . 我没有调用onAdClicked() .

我读了documentation,它说这适用于有限的广告 .

public void onAdClicked() Called when a click is recorded for an ad. At the current time, this method is only used with native ads originating from Google in one of the system-defined formats (App Install or Content).

有人可以解释这是什么意思 - “这种方法只能用......”?有什么限制?