Convert features into graphics to show them with mil2525d symbols.
Use case
A dictionary renderer uses a style file along with a rule engine to display advanced symbology. This is useful for displaying features using precise military symbology.
How to use the sample
Pan and zoom around the map. Observe the displayed military symbology on the map.
How it works
Create a Geodatabase using new Geodatabase(geodatabasePath).
Load the geodatabase using Geodatabase.load().
Instantiate a DictionarySymbolStyle using DictionarySymbolStyle.createFromFile(dictionarySymbolStylePath).
Load the symbol dictionary using dictionarySymbolStyle.load().
For each GeoDatabaseFeatureTable in the GeoDatabase, create a feature layer with it, then add it to the map using map.operationalLayers.add(featureLayer).
Create DictionaryRenderer(dictionarySymbolStyle) and assign it to the feature layer renderer.
Set the viewpoint of the map view to the extent of the feature layer using mapView.setViewpoint(Viewpoint(featureLayer.fullExtent)).
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
/* Copyright 2023 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.applydictionaryrenderertofeaturelayer
import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.AppCompatActivity
import androidx.databinding.DataBindingUtil
import androidx.lifecycle.lifecycleScope
import com.arcgismaps.ApiKey
import com.arcgismaps.ArcGISEnvironment
import com.arcgismaps.data.Geodatabase
import com.arcgismaps.mapping.ArcGISMap
import com.arcgismaps.mapping.BasemapStyle
import com.arcgismaps.mapping.Viewpoint
import com.arcgismaps.mapping.layers.FeatureLayer
import com.arcgismaps.mapping.symbology.DictionaryRenderer
import com.arcgismaps.mapping.symbology.DictionarySymbolStyle
import com.esri.arcgismaps.sample.applydictionaryrenderertofeaturelayer.databinding.ActivityMainBinding
import com.google.android.material.snackbar.Snackbar
import kotlinx.coroutines.launch
import java.io.File
classMainActivity : AppCompatActivity() {
// set up data binding for the activityprivateval activityMainBinding: ActivityMainBinding by lazy {
DataBindingUtil.setContentView(this, R.layout.activity_main)
}
privateval mapView by lazy {
activityMainBinding.mapView
}
privateval provisionPath: String by lazy {
getExternalFilesDir(null)?.path.toString() + File.separator + getString(R.string.app_name)
}
overridefunonCreate(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)
// create and add a map with a navigation night basemap styleval map = ArcGISMap(BasemapStyle.ArcGISTopographic)
mapView.map = map
// locate the .stylx file in the deviceval styleFile = File(provisionPath, getString(R.string.mil2525d_stylx))
// instantiate the dictionarySymbolStyle using the file pathval dictionarySymbolStyle = DictionarySymbolStyle.createFromFile(styleFile.absolutePath)
// locate the .geodatabase file in the deviceval geodatabaseFile = File(provisionPath, getString(R.string.militaryoverlay_geodatabase))
// instantiate the geodatabase with the file pathval geodatabase = Geodatabase(geodatabaseFile.path)
lifecycleScope.launch {
// load the dictionary symbol style dictionarySymbolStyle.load().getOrElse {
return@launch showError("Error loading DictionarySymbolStyle: ${it.message}")
}
// load the geodatabase geodatabase.load().getOrElse {
showError("Error loading Geodatabase: ${it.message}")
}
geodatabase.featureTables.forEach { geodatabaseFeatureTable ->
// load each geodatabaseFeatureTable and create featureLayer from it geodatabaseFeatureTable.load().getOrElse {
return@launch showError("Error loading GeodatabaseFeatureTable: ${it.message}")
}
val featureLayer = FeatureLayer.createWithFeatureTable(geodatabaseFeatureTable)
featureLayer.load().getOrElse {
return@launch showError("Error loading FeatureLayer: ${it.message}")
}
// add featureLayer to the map's operational layer mapView.map?.operationalLayers?.add(featureLayer)
// create dictionaryRenderer using the dictionarySymbolStyle and apply it to the featureLayer's rendererval dictionaryRenderer = DictionaryRenderer(dictionarySymbolStyle)
featureLayer.renderer = dictionaryRenderer
// get the featureLayer's envelope to set the map viewpointval extent = featureLayer.fullExtent
?: return@launch showError("Error retrieving extent of the feature layer")
mapView.setViewpoint(Viewpoint(extent))
}
}
}
privatefunshowError(message: String) {
Log.e(localClassName, message)
Snackbar.make(mapView, message, Snackbar.LENGTH_SHORT).show()
}
}