Add features (feature service)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
/*
 * Copyright 2019 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.addfeaturesfeatureservice

import android.os.Bundle
import android.util.Log
import android.view.MotionEvent
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment
import com.esri.arcgisruntime.ArcGISRuntimeException
import com.esri.arcgisruntime.data.ServiceFeatureTable
import com.esri.arcgisruntime.data.ServiceGeodatabase
import com.esri.arcgisruntime.geometry.Point
import com.esri.arcgisruntime.layers.FeatureLayer
import com.esri.arcgisruntime.mapping.ArcGISMap
import com.esri.arcgisruntime.mapping.BasemapStyle
import com.esri.arcgisruntime.mapping.Viewpoint
import com.esri.arcgisruntime.mapping.view.DefaultMapViewOnTouchListener
import com.esri.arcgisruntime.mapping.view.MapView
import com.esri.arcgisruntime.sample.addfeaturesfeatureservice.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

    private val activityMainBinding by lazy {
        ActivityMainBinding.inflate(layoutInflater)
    }

    private val mapView: MapView by lazy {
        activityMainBinding.mapView
    }

    override fun onCreate(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 map with streets basemap
        ArcGISMap(BasemapStyle.ARCGIS_STREETS).let { map ->
            // create and load the service geodatabase
            ServiceGeodatabase(getString(R.string.service_layer_url)).apply {
                loadAsync()
                addDoneLoadingListener {
                    // create a feature layer using the first layer in the geodatabase
                    val serviceFeatureTable = getTable(0)
                    // add a listener to the MapView to detect when a user has performed a single tap to add a new feature to
                    // the service feature table
                    mapView.onTouchListener =
                        object : DefaultMapViewOnTouchListener(this@MainActivity, mapView) {
                            override fun onSingleTapConfirmed(motionEvent: MotionEvent?): Boolean {
                                motionEvent?.let { event ->
                                    // create a point from where the user clicked
                                    android.graphics.Point(event.x.toInt(), event.y.toInt())
                                        .let { point ->
                                            // create a map point from a point
                                            mapView.screenToLocation(point)
                                        }.let { mapPoint ->
                                            // add a new feature to the service feature table
                                            addFeature(mapPoint, serviceFeatureTable)
                                        }
                                }
                                return super.onSingleTapConfirmed(motionEvent)
                            }
                        }
                    // create a feature layer from table
                    val featureLayer = FeatureLayer(serviceFeatureTable)
                    // add the layer to the map
                    map.operationalLayers.add(featureLayer)
                }
            }
            // set map to be displayed in map view
            mapView.map = map

            // set an initial view point
            mapView.setViewpoint(Viewpoint(40.0, -95.0, 10000000.0))
        }
    }

    /**
     * Adds a new Feature to a ServiceFeatureTable and applies the changes to the
     * server.
     *
     * @param mapPoint location to add feature
     * @param featureTable service feature table to add feature
     */
    private fun addFeature(mapPoint: Point, featureTable: ServiceFeatureTable) {
        // create default attributes for the feature
        hashMapOf<String, Any>(
            "typdamage" to "Destroyed",
            "primcause" to "Earthquake"
        ).let { attributes ->
            // creates a new feature using default attributes and point
            featureTable.createFeature(attributes, mapPoint)
        }.let { feature ->
            // check if feature can be added to feature table
            if (featureTable.canAdd()) {
                // add the new feature to the feature table and to server
                featureTable.addFeatureAsync(feature).addDoneListener { applyEdits(featureTable) }
            } else {
                logToUser(true, getString(R.string.error_cannot_add_to_feature_table))
            }
        }

    }

    /**
     * Sends any edits on the ServiceFeatureTable to the server.
     *
     * @param featureTable service feature table
     */
    private fun applyEdits(featureTable: ServiceFeatureTable) {

        // apply the changes to the server
        featureTable.serviceGeodatabase.applyEditsAsync().let { editResult ->
            editResult.addDoneListener {
                try {
                    editResult.get()?.let { edits ->
                        // check if the server edit was successful
                        edits.firstOrNull()?.let {
                            if (!it.editResult[0].hasCompletedWithErrors()) {
                                logToUser(false, getString(R.string.feature_added))
                            } else {
                                it.editResult[0].error
                            }
                        }
                    }
                } catch (e: ArcGISRuntimeException) {
                    logToUser(true, getString(R.string.error_applying_edits, e.cause?.message))
                }
            }
        }
    }

    override fun onResume() {
        super.onResume()
        mapView.resume()
    }

    override fun onPause() {
        mapView.pause()
        super.onPause()
    }

    override fun onDestroy() {
        mapView.dispose()
        super.onDestroy()
    }
}

/*
* AppCompatActivity Extensions
*/

/**
 * Shows a Toast to user and logs to logcat.
 *
 * @param isError whether message is an error. Determines log level.
 * @param message message to display
 */
fun AppCompatActivity.logToUser(isError: Boolean, message: String) {
    Toast.makeText(this, message, Toast.LENGTH_LONG).show()
    if (isError) {
        Log.e(this::class.java.simpleName, message)
    } else {
        Log.d(this::class.java.simpleName, message)
    }
}