java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.aggiemap/com.example.aggiemap.MapsActivity}: java.lang.NullPointerException: null cannot be cast to non-null type com.google.android.gms.maps.SupportMapFragmentup the map after those finish running
, notEqual:null可以看出,我希望这些字段大于0,不应为空或空白,但无论我做什么,而不是显示一条友好的消息,如“属性不能为空”,我的屏幕上充满了长时间的异常...有没有其他方法来验证非空输入的整数?Failed to convert property value of type java.lang.String to required type