(七) GPS定位

我們已經(jīng)知道，業(yè)務(wù)圖層現(xiàn)在歸ArcGISMap管理，因此，我們可以從它獲取業(yè)務(wù)圖層
這里用一個(gè)arcgis提供的WebGIS網(wǎng)址，上邊自帶了降雨量點(diǎn)的業(yè)務(wù)數(shù)據(jù)
http://www.arcgis.com/home/webmap/viewer.html?webmap=55c1665bcd064552944a9e8296271ec3
跟之前一樣，加載地圖,忘記的回看第三篇 加載地圖

val url ="http://www.arcgis.com/home/webmap/viewer.html?webmap=55c1665bcd064552944a9e8296271ec3";
val arcGISMap = ArcGISMap(url)
mapView.map = arcGISMap

降雨量分布地圖

可以看到，地圖上已經(jīng)有一個(gè)降雨量分布的圖層了

獲取業(yè)務(wù)圖層

//獲取operationalLayer 集合
val operationalLayers = mapView.map.operationalLayers
 for (layer in operationalLayers) {
            Log.e("test", layer.name)
}

添加本地業(yè)務(wù)圖層geodatabase

var path ="數(shù)據(jù)存儲位置/文件名.geodatabase"
val geodatabase = Geodatabase(path)
geodatabase.loadAsync()
geodatabase.addDoneLoadingListener {
     val wellFeatureLayers = ArrayList<FeatureLayer>()
     for (geoFeatureTable in geodatabase.geodatabaseFeatureTables) {
            val featureLayer = FeatureLayer(geoFeatureTable)
            wellFeatureLayers.add(featureLayer)
     }
      mapView.map.operationalLayers.addAll(wellFeatureLayers)
}

顯隱控制

//這里舉例控制底層
val layers = operationalLayers[0]
layer.isVisible = true //顯示
layer.isVisible = false//隱藏
operationalLayers[0].isVisibleAtScale(1000.0) boolean 值，判斷這個(gè)比例下是否顯示

(九) 空間查詢