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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/* Copyright 2022 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.arcgismaps.sample.showresultofspatialoperations
import android.os.Bundle
import android.widget.ArrayAdapter
import androidx.appcompat.app.AppCompatActivity
import androidx.databinding.DataBindingUtil
import androidx.lifecycle.lifecycleScope
import com.arcgismaps.ApiKey
import com.arcgismaps.ArcGISEnvironment
import com.arcgismaps.Color
import com.arcgismaps.geometry.Geometry
import com.arcgismaps.geometry.GeometryEngine
import com.arcgismaps.geometry.MutablePart
import com.arcgismaps.geometry.Point
import com.arcgismaps.geometry.Polygon
import com.arcgismaps.geometry.PolygonBuilder
import com.arcgismaps.geometry.SpatialReference
import com.arcgismaps.mapping.ArcGISMap
import com.arcgismaps.mapping.BasemapStyle
import com.arcgismaps.mapping.symbology.SimpleFillSymbol
import com.arcgismaps.mapping.symbology.SimpleFillSymbolStyle
import com.arcgismaps.mapping.symbology.SimpleLineSymbol
import com.arcgismaps.mapping.symbology.SimpleLineSymbolStyle
import com.arcgismaps.mapping.view.Graphic
import com.arcgismaps.mapping.view.GraphicsOverlay
import com.esri.arcgismaps.sample.showresultofspatialoperations.databinding.ActivityMainBinding
import kotlinx.coroutines.launch
private val Color.Companion.blue: Color
get() {
return fromRgba(0, 0, 255, 255)
}
class MainActivity : AppCompatActivity() {
private val TAG = MainActivity::class.java.simpleName
// set up data binding for the activity
private val activityMainBinding: ActivityMainBinding by lazy {
DataBindingUtil.setContentView(this, R.layout.activity_main)
}
private val mapView by lazy {
activityMainBinding.mapView
}
// enum to keep track of the selected operation to display on the map
enum class SpatialOperation(val menuPosition: Int) {
NO_OPERATION(0),
INTERSECTION(1),
UNION(2),
DIFFERENCE(3),
SYMMETRIC_DIFFERENCE(4)
}
// create the graphic overlays
private val inputGeometryGraphicsOverlay: GraphicsOverlay by lazy { GraphicsOverlay() }
private val resultGeometryGraphicsOverlay: GraphicsOverlay by lazy { GraphicsOverlay() }
// simple black line symbol for outlines
private val lineSymbol = SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.black, 1f)
// red fill symbol for result
private val resultFillSymbol =
SimpleFillSymbol(SimpleFillSymbolStyle.Solid, Color.red, lineSymbol)
// the two polygons for perform spatial operations
private lateinit var inputPolygon1: Polygon
private lateinit var inputPolygon2: Polygon
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
// authentication with an API key or named user is
// required to access basemaps and other location services
ArcGISEnvironment.apiKey = ApiKey.create(BuildConfig.API_KEY)
lifecycle.addObserver(mapView)
// set up the adapter
val arrayAdapter = ArrayAdapter(
this, R.layout.dropdown_item, resources.getStringArray(R.array.operation)
)
activityMainBinding.bottomListItems.apply {
setAdapter(arrayAdapter)
setOnItemClickListener { _, _, i, _ ->
updateGeometry(i)
}
}
// set up the MapView
mapView.apply {
// create an ArcGISMap with a light gray basemap
map = ArcGISMap(BasemapStyle.ArcGISLightGray)
// create graphics overlays to show the inputs and results of the spatial operation
graphicsOverlays.add(inputGeometryGraphicsOverlay)
graphicsOverlays.add(resultGeometryGraphicsOverlay)
}
// create input polygons and add graphics to display these polygons in an overlay
createPolygons()
// center the map view on the input geometries
val envelope = GeometryEngine.union(inputPolygon1, inputPolygon2)?.extent
if (envelope != null) {
lifecycleScope.launch {
mapView.setViewpointGeometry(envelope, 20.0)
}
}
}
private fun updateGeometry(position: Int) {
// clear previous operation result
resultGeometryGraphicsOverlay.graphics.clear()
// create a result geometry of the spatial operation
var resultGeometry: Geometry? = null
// get the selected operation
when (SpatialOperation.values().find { it.menuPosition == position }) {
SpatialOperation.NO_OPERATION -> { /* No operation needed */
}
SpatialOperation.INTERSECTION -> {
resultGeometry = GeometryEngine.intersection(inputPolygon1, inputPolygon2)
}
SpatialOperation.UNION -> {
resultGeometry = GeometryEngine.union(inputPolygon1, inputPolygon2)
}
SpatialOperation.DIFFERENCE -> {
resultGeometry = GeometryEngine.difference(inputPolygon1, inputPolygon2)
}
SpatialOperation.SYMMETRIC_DIFFERENCE -> {
resultGeometry = GeometryEngine.symmetricDifference(inputPolygon1, inputPolygon2)
}
null -> {}
}
// add a graphic from the result geometry, showing result in red
if (resultGeometry != null) {
val resultGraphic = Graphic(resultGeometry, resultFillSymbol).also {
// select the result to highlight it
it.isSelected = true
}
// add the result graphic to the graphic overlay
resultGeometryGraphicsOverlay.graphics.add(resultGraphic)
}
}
private fun createPolygons() {
// create input polygon 1
val polygonBuilder1 = PolygonBuilder(SpatialReference.webMercator()) {
// add points to the point collection
addPoint(Point(-13160.0, 6710100.0))
addPoint(Point(-13300.0, 6710500.0))
addPoint(Point(-13760.0, 6710730.0))
addPoint(Point(-14660.0, 6710000.0))
addPoint(Point(-13960.0, 6709400.0))
}
inputPolygon1 = polygonBuilder1.toGeometry()
// create and add a blue graphic to show input polygon 1
val blueFill = SimpleFillSymbol(SimpleFillSymbolStyle.Solid, Color.blue, lineSymbol)
inputGeometryGraphicsOverlay.graphics.add(Graphic(inputPolygon1, blueFill))
// outer ring
val outerRing = MutablePart.createWithPoints(
listOf(
Point(-13060.0, 6711030.0),
Point(-12160.0, 6710730.0),
Point(-13160.0, 6709700.0),
Point(-14560.0, 6710730.0),
Point(-13060.0, 6711030.0),
),
SpatialReference.webMercator()
)
// inner ring
val innerRing = MutablePart.createWithPoints(
listOf(
Point(-13060.0, 6710910.0),
Point(-12450.0, 6710660.0),
Point(-13160.0, 6709900.0),
Point(-14160.0, 6710630.0),
Point(-13060.0, 6710910.0)
),
SpatialReference.webMercator()
)
// add both parts (rings) to a polygon and create a geometry from it
inputPolygon2 = Polygon(listOf(outerRing, innerRing))
// create and add a green graphic to show input polygon 2
val greenFill = SimpleFillSymbol(SimpleFillSymbolStyle.Solid, Color.green, lineSymbol)
inputGeometryGraphicsOverlay.graphics.add(Graphic(inputPolygon2, greenFill))
}
}
