当我尝试像下面这样启动AppInviteContent时:AppInviteContentcontent=newAppInviteContent.Builder().setApplinkUrl("....").setPreviewImageUrl("https://amazingslider.com/wp-content/uploads/2012/12/dandelion.jpg").build();AppInviteDialog.show(activity,content);我收到错误TheSDKhasnotbeeninitialized,makesuretocallFacebook