A GeoPackage is an OGC standard, making it useful when your project requires an open source data format or when other, non-ArcGIS systems may be creating the data. Accessing data from a local GeoPackage is useful when working in an environment that has an inconsistent internet connection or that does not have an internet connection at all. For example, a department of transportation field worker might source map data from a GeoPackage when conducting signage inspections in rural areas with poor network coverage.
How to use the sample
Pan and zoom around the map. View the data loaded from the geopackage.
How it works
Create a GeoPackage passing the URI string into the constructor.
Load the GeoPackage with GeoPackage.loadAsync
When it's done loading, get the GeoPackageFeatureTable objects from the geopackage with geoPackage.getGeoPackageFeatureTables()
Create a FeatureLayer(featureTable) for each feature table and add it to the map as an operational layer. Add each to
the map as an operational layer with map.getOperationalLayers().add(featureLayer)
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/* Copyright 2017 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.featurelayergeopackage;
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.FeatureTable;
import com.esri.arcgisruntime.data.GeoPackage;
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.Viewpoint;
import com.esri.arcgisruntime.mapping.view.MapView;
publicclassMainActivityextendsAppCompatActivity{
privatefinal String TAG = MainActivity.class.getSimpleName();
private MapView mMapView;
private ArcGISMap mMap;
// objects that implement Loadable must be class fields to prevent being garbage collected before loadingprivate GeoPackage mGeoPackage;
@OverrideprotectedvoidonCreate(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);
// inflate MapView from layout mMapView = findViewById(R.id.mapView);
// create a map with the Basemap Style topographic mMap = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC);
// set the map to be displayed in this view mMapView.setMap(mMap);
mMapView.setViewpoint(new Viewpoint(39.7294, -104.8319, 100000));
// Get the full path to the local GeoPackage String geoPackagePath = getExternalFilesDir(null) + getString(R.string.aurora_co_gpkg);
// Open the GeoPackage mGeoPackage = new GeoPackage(geoPackagePath);
mGeoPackage.loadAsync();
mGeoPackage.addDoneLoadingListener(() -> {
if (mGeoPackage.getLoadStatus() == LoadStatus.LOADED) {
// Read the feature tables and get the first one FeatureTable geoPackageTable = mGeoPackage.getGeoPackageFeatureTables().get(0);
// Make sure a feature table was found in the packageif (geoPackageTable == null) {
Toast.makeText(MainActivity.this, "No feature table found in the package!", Toast.LENGTH_LONG).show();
Log.e(TAG, "No feature table found in this package!");
return;
}
// Create a layer to show the feature table FeatureLayer featureLayer = new FeatureLayer(geoPackageTable);
// Add the feature table as a layer to the map (with default symbology) mMap.getOperationalLayers().add(featureLayer);
} else {
Toast.makeText(MainActivity.this, "GeoPackage failed to load! " + mGeoPackage.getLoadError(), Toast.LENGTH_LONG).show();
Log.e(TAG, "GeoPackage failed to load!" + mGeoPackage.getLoadError());
}
});
}
@OverrideprotectedvoidonPause(){
super.onPause();
mMapView.pause();
}
@OverrideprotectedvoidonResume(){
super.onResume();
mMapView.resume();
}
@OverrideprotectedvoidonDestroy(){
super.onDestroy();
mMapView.dispose();
}
}