我无法导入以下套餐：
import com.vmax.android.ads.api.VmaxAdSettings;
import com.vmax.android.ads.mediation.partners.VMAXVideoPlayer;
由于这个原因我得到以下错误：
Error:(50, 55) error: <anonymous com.ads.AboutActivity$1> is not abstract and does not override abstract method onAdMediaEnd(boolean,long) in VmaxAdListener
Error:(61, 13) error: method does not override or implement a method from a supertype
Error:(66, 13) error: method does not override or implement a method from a supertype
Error:(71, 19) error: cannot find symbol method loadAd()
请帮助我，如果您有任何解决方案可以帮助我，或者任何可以帮助我的例子。
VMAX SDK for Android – Alternative method， AdMob Integration using Android SDK