arcgis for android 100 怎么获取当前底图的范围

val arcGISMapImageLayer = ArcGISMapImageLayer(底图的路径)

arcGISMapImageLayer.addDoneLoadingListener {

    mapViewFlag = when (arcGISMapImageLayer.loadStatus) {

        LoadStatus.FAILED_TO_LOAD -> {

            ToastUtils.showShort("地图加载失败")

            false

        }

        LoadStatus.LOADED -> {

            ToastUtils.showShort("地图加载成功")

            // 获取底图范围

            val extent = arcGISMapImageLayer.fullExtent

            true

        }

        else -> {

            ToastUtils.showShort("地图加载中")

            false

        }

    }

}