FCM服务:publicclassFCMServiceextendsFirebaseMessagingService{@OverridepublicvoidonMessageReceived(RemoteMessageremoteMessage){Log.i(Constants.TAG,"onMessageReceived");Log.i(Constants.TAG,"From:"+remoteMessage.getFrom());if(remoteMessage.getData().size()>0){Log.d(Constants.TAG,"Messagedatapayload:"