Kotlin 冒泡算法 ，高德地图 过滤掉两点之间距离小于50的数据，不重复显示

Posted 2022-06-13 黄毛火烧雪下

 /**
     * 冒泡过滤算法
     */
    private fun getNeedShowOilStation() 
        originalList?.forEachIndexed  i, oneModel ->
            //如果待删除列表不包含则继续执行
            if (deleteList?.contains(oneModel)) 
                return@forEachIndexed
            
            originalList?.forEachIndexed  j, twoModel ->

                if (j <= i || deleteOilStationEntityList?.contains(twoModel)) 
                    return@forEachIndexed
                

                //计算两点之间的距离
                var distance = calculateLineDistance(
                    LatLng(
                        oneModel?.latitude ?: 0.0,
                        oneModel?.longitude ?: 0.0
                    ), LatLng(twoModel?.latitude ?: 0.0, twoModel?.longitude ?: 0.0)
                )
                //小于50m，则标识要过滤掉
                if (distance <= 50) 
                    deleteList?.add(twoModel)
                
            
        

        oilStationEntityList.removeAll(deleteList)