必须在调用loadEd之前设置adsize和ad unit id在react native android app中发生错误

Question

我正在使用react-native-admob库来实现admob功能，它在iOS中运行良好，但在android中它显示错误“adsize和广告单元ID必须在调用loadEd之前设置”。我的代码是

                   <AdMobBanner
                        bannerSize="smartBannerPortrait"
                        adUnitID={(Platform.OS === 'ios') ? "iOS App Id" : "android App Id" }
                        //testDeviceID="SIMULATOR"
                        adViewDidReceiveAd={this.didReceiveAd}
                       didFailToReceiveAdWithError={this.bannerError}
                       />