Create a feature collection layer from a portal item.
Use case
Feature collection layers are often used to hold features with mixed geometry or unstructured data. You can display feature collections stored in a Portal, which are often used for showing content from a CSV or map notes.
How to use the sample
The feature collection is loaded from the Portal item when the sample starts.
How it works
Create a Portal.
Create the PortalItem, referring to the portal and an item ID.
Verify that the item represents a feature collection.
Create a FeatureCollection from the item.
Create a FeatureCollectionLayer, referring to the feature collection.
Add the feature collection layer to the map's OperationalLayers collection.
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/*
* Copyright 2020 Esri
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/package com.esri.arcgisruntime.sample.featurecollectionlayerportalitem
import android.os.Bundle
import android.util.Log
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment
import com.esri.arcgisruntime.data.FeatureCollection
import com.esri.arcgisruntime.layers.FeatureCollectionLayer
import com.esri.arcgisruntime.loadable.LoadStatus
import com.esri.arcgisruntime.mapping.ArcGISMap
import com.esri.arcgisruntime.mapping.BasemapStyle
import com.esri.arcgisruntime.mapping.view.MapView
import com.esri.arcgisruntime.portal.Portal
import com.esri.arcgisruntime.portal.PortalItem
import com.esri.arcgisruntime.sample.featurecollectionlayerportalitem.databinding.ActivityMainBinding
classMainActivity : AppCompatActivity() {
privateval TAG = MainActivity::class.java.simpleName
privateval activityMainBinding by lazy {
ActivityMainBinding.inflate(layoutInflater)
}
privateval mapView: MapView by lazy {
activityMainBinding.mapView
}
overridefunonCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(activityMainBinding.root)
// authentication with an API key or named user is required to access basemaps and other// location services ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY)
// create a portal item from an ArcGIS Online portal and a feature collection item idval portal = Portal("https://www.arcgis.com/")
val collectionItem = PortalItem(portal, "32798dfad17942858d5eef82ee802f0b")
// if the portal item loaded correctly, create a feature collection layer with the feature collectionval featureCollection = FeatureCollection(collectionItem)
val featureCollectionLayer = FeatureCollectionLayer(featureCollection)
// create a map with the oceans basemap and add it to the map view mapView.map = ArcGISMap(BasemapStyle.ARCGIS_OCEANS).apply {
// add the new feature collection layer to the map operationalLayers.add(featureCollectionLayer)
}
// check for loading errors using a DoneLoadingListener collectionItem.addDoneLoadingListener {
// abort if the portal item fails to loadif (collectionItem.loadStatus != LoadStatus.LOADED) {
val error = "Failed to load portal item: ${collectionItem.loadError.message}" Log.e(TAG, error)
Toast.makeText(this, error, Toast.LENGTH_LONG).show()
return@addDoneLoadingListener }
// abort if the portal item is not a feature collection, as expectedif (collectionItem.type != PortalItem.Type.FEATURE_COLLECTION) {
val error = "Portal item is not a feature collection!" Log.e(TAG, error)
Toast.makeText(this, error, Toast.LENGTH_LONG).show()
return@addDoneLoadingListener }
}
}
overridefunonResume() {
super.onResume()
mapView.resume()
}
overridefunonPause() {
mapView.pause()
super.onPause()
}
overridefunonDestroy() {
mapView.dispose()
super.onDestroy()
}
}