在使用NFC开发碰一碰功能的代码:NfcController.ReaderModeCallbackstubnewNfcController.ReaderModeCallback()nfcController.setReaderMode(this.getAbility(),stub,1,newPacMapEx());这里报错报错java.lang.NullPointerException:Attempttoinvokevirtualmethod'voidohos.aafwk.ability.HarmonyosApplication.registerAbilityLifecycleCallbacks(ohos.aafwk.ability.AbilityLifecycleCallbacks)'onanullobjectreferenceatohos....
NFC