Feature layer dictionary renderer

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
/* Copyright 2018 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.featurelayerdictionaryrenderer;

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.Geodatabase;
import com.esri.arcgisruntime.data.GeodatabaseFeatureTable;
import com.esri.arcgisruntime.layers.FeatureLayer;
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.symbology.DictionaryRenderer;
import com.esri.arcgisruntime.symbology.DictionarySymbolStyle;

public class MainActivity extends AppCompatActivity {

  private static final String TAG = MainActivity.class.getSimpleName();

  private MapView mMapView;
  // objects that implement Loadable must be class fields to prevent being garbage collected before loading
  private Geodatabase mGeodatabase;
  private DictionarySymbolStyle mSymbolDictionary;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // authentication with an API key or named user is required to access basemaps and other
    // location services
    ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY);

    // get the reference to the map view
    mMapView = findViewById(R.id.mapView);

    ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC);
    // set the map to the map view
    mMapView.setMap(map);

    // load geo-database from local location
    mGeodatabase = new Geodatabase(
        getExternalFilesDir(null) + getString(R.string.militaryoverlay_geodatabase));
    mGeodatabase.loadAsync();

    // render tells layer what symbols to apply to what features
    mSymbolDictionary = DictionarySymbolStyle.createFromFile(getExternalFilesDir(null) + getString(R.string.mil2525d_stylx));
    mSymbolDictionary.loadAsync();

    mGeodatabase.addDoneLoadingListener(() -> {
      if (mGeodatabase.getLoadStatus() == LoadStatus.LOADED) {

        for (GeodatabaseFeatureTable table : mGeodatabase.getGeodatabaseFeatureTables()) {
          // add each layer to map
          FeatureLayer featureLayer = new FeatureLayer(table);
          featureLayer.loadAsync();
          // features no longer show after this scale
          featureLayer.setMinScale(1000000);
          mMapView.getMap().getOperationalLayers().add(featureLayer);

          mSymbolDictionary.addDoneLoadingListener(() -> {
            if (mSymbolDictionary.getLoadStatus() == LoadStatus.LOADED) {
              // displays features from layer using mil2525d symbols
              DictionaryRenderer dictionaryRenderer = new DictionaryRenderer(mSymbolDictionary);
              featureLayer.setRenderer(dictionaryRenderer);

              featureLayer.addDoneLoadingListener(() -> {
                if (featureLayer.getLoadStatus() == LoadStatus.LOADED) {
                  // initial viewpoint to encompass all graphics displayed on the map view
                  mMapView.setViewpointGeometryAsync(featureLayer.getFullExtent());
                } else {
                  String error = "Feature Layer Failed to Load: " + featureLayer.getLoadError().getMessage();
                  Toast.makeText(this, error, Toast.LENGTH_LONG).show();
                  Log.e(TAG, error);
                }
              });
            } else {
              String error = "Dictionary Symbol Failed to Load: " + mSymbolDictionary.getLoadError().getMessage();
              Toast.makeText(this, error, Toast.LENGTH_LONG).show();
              Log.e(TAG, error);
            }
          });
        }
      } else {
        String error = "Geodatabase Failed to Load: " + mGeodatabase.getLoadError().getMessage();
        Toast.makeText(this, error, Toast.LENGTH_LONG).show();
        Log.e(TAG, error);
      }
    });
  }

  @Override
  protected void onPause() {
    mMapView.pause();
    super.onPause();
  }

  @Override
  protected void onResume() {
    super.onResume();
    mMapView.resume();
  }

  @Override
  protected void onDestroy() {
    mMapView.dispose();
    super.onDestroy();
  }
}