GeoPackages are designed to simplify file management and transfer. They can store raster files (as well as other types of data). An end-user wishing to transfer rasters from ArcGIS Pro or between runtime apps might need to import raster files from GeoPackages into their map to view and analyze the data.
How to use the sample
When the sample starts, a raster will be loaded from a GeoPackage and displayed in the map view.
How it works
Create and load a GeoPackage, specifying the path to the local .gpkg file.
When it is done loading, get the GeoPackageRasters from the geopackage.
Construct a RasterLayer with the geopackage raster you want to use.
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/*
* 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.rasterlayergeopackage;
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.GeoPackage;
import com.esri.arcgisruntime.layers.RasterLayer;
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;
import com.esri.arcgisruntime.raster.Raster;
publicclassMainActivityextendsAppCompatActivity{
privatestaticfinal String TAG = MainActivity.class.getSimpleName();
private MapView mMapView;
// 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);
// get a reference to the map view mMapView = findViewById(R.id.mapView);
// create a map with the Basemap Style light gray canvas ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_LIGHT_GRAY);
// set the map to be displayed in this view mMapView.setMap(map);
mMapView.setViewpoint(new Viewpoint( 39.7294, -104.8319, 1000000));
// open the GeoPackage mGeoPackage = new GeoPackage(getExternalFilesDir(null) + getString(R.string.geopackage_path));
mGeoPackage.loadAsync();
mGeoPackage.addDoneLoadingListener(() -> {
if (mGeoPackage.getLoadStatus() == LoadStatus.LOADED) {
if (!mGeoPackage.getGeoPackageRasters().isEmpty()) {
// read raster images and get the first one Raster geoPackageRaster = mGeoPackage.getGeoPackageRasters().get(0);
// create a layer to show the raster RasterLayer geoPackageRasterLayer = new RasterLayer(geoPackageRaster);
// add the image as a raster layer to the map (with default symbology) mMapView.getMap().getOperationalLayers().add(geoPackageRasterLayer);
} else {
String emptyMessage = "No rasters found in this GeoPackage!";
Toast.makeText(this, emptyMessage, Toast.LENGTH_LONG).show();
Log.e(TAG, emptyMessage);
}
} else {
String error = "GeoPackage failed to load!";
Toast.makeText(this, error, Toast.LENGTH_LONG).show();
Log.e(TAG, error);
}
});
}
@OverrideprotectedvoidonPause(){
mMapView.pause();
super.onPause();
}
@OverrideprotectedvoidonResume(){
super.onResume();
mMapView.resume();
}
@OverrideprotectedvoidonDestroy(){
mMapView.dispose();
super.onDestroy();
}
}