// Context context = ...; // File geoPackageFile = ...; // GoogleMap map = ...; // Get a manager GeoPackageManager manager = GeoPackageFactory.getManager(context); // Import database boolean imported = manager.importGeoPackage(geoPackageFile); // Available databases List<String> databases = manager.databases(); // Open database GeoPackage geoPackage = manager.open(databases.get(0)); // GeoPackage Table DAOs SpatialReferenceSystemDao srsDao = geoPackage.getSpatialReferenceSystemDao(); ContentsDao contentsDao = geoPackage.getContentsDao(); GeometryColumnsDao geomColumnsDao = geoPackage.getGeometryColumnsDao(); TileMatrixSetDao tileMatrixSetDao = geoPackage.getTileMatrixSetDao(); TileMatrixDao tileMatrixDao = geoPackage.getTileMatrixDao(); SchemaExtension schemaExtension = new SchemaExtension(geoPackage); DataColumnsDao dao = schemaExtension.getDataColumnsDao(); DataColumnConstraintsDao dataColumnConstraintsDao = schemaExtension .getDataColumnConstraintsDao(); MetadataExtension metadataExtension = new MetadataExtension(geoPackage); MetadataDao metadataDao = metadataExtension.getMetadataDao(); MetadataReferenceDao metadataReferenceDao = metadataExtension .getMetadataReferenceDao(); ExtensionsDao extensionsDao = geoPackage.getExtensionsDao(); // Feature and tile tables List<String> features = geoPackage.getFeatureTables(); List<String> tiles = geoPackage.getTileTables(); // Query Features String featureTable = features.get(0); FeatureDao featureDao = geoPackage.getFeatureDao(featureTable); GoogleMapShapeConverter converter = new GoogleMapShapeConverter( featureDao.getProjection()); FeatureCursor featureCursor = featureDao.queryForAll(); try { for (FeatureRow featureRow : featureCursor) { GeoPackageGeometryData geometryData = featureRow.getGeometry(); if (geometryData != null && !geometryData.isEmpty()) { Geometry geometry = geometryData.getGeometry(); GoogleMapShape shape = converter.toShape(geometry); GoogleMapShape mapShape = GoogleMapShapeConverter .addShapeToMap(map, shape); // ... } } } finally { featureCursor.close(); } // Query Tiles String tileTable = tiles.get(0); TileDao tileDao = geoPackage.getTileDao(tileTable); TileCursor tileCursor = tileDao.queryForAll(); try { for (TileRow tileRow : tileCursor) { byte[] tileBytes = tileRow.getTileData(); Bitmap tileBitmap = tileRow.getTileDataBitmap(); // ... } } finally { tileCursor.close(); } // Retrieve Tiles by XYZ GeoPackageTileRetriever retriever = new GeoPackageTileRetriever(tileDao); GeoPackageTile geoPackageTile = retriever.getTile(2, 2, 2); if (geoPackageTile != null) { byte[] tileBytes = geoPackageTile.getData(); Bitmap tileBitmap = geoPackageTile.getBitmap(); // ... } // Retrieve Tiles by Bounding Box TileCreator tileCreator = new TileCreator( tileDao, ProjectionFactory.getProjection(ProjectionConstants.EPSG_WORLD_GEODETIC_SYSTEM)); GeoPackageTile geoPackageTile2 = tileCreator.getTile( new BoundingBox(-90.0, 0.0, 0.0, 66.513260)); if (geoPackageTile2 != null) { byte[] tileBytes = geoPackageTile2.getData(); Bitmap tileBitmap = geoPackageTile2.getBitmap(); // ... } // Tile Provider (GeoPackage or Google API) TileProvider overlay = GeoPackageOverlayFactory .getTileProvider(tileDao); TileOverlayOptions overlayOptions = new TileOverlayOptions(); overlayOptions.tileProvider(overlay); overlayOptions.zIndex(-1); map.addTileOverlay(overlayOptions); BoundingBox boundingBox = BoundingBox.worldWebMercator(); Projection projection = ProjectionFactory .getProjection(ProjectionConstants.EPSG_WEB_MERCATOR); // Index Features FeatureIndexManager indexer = new FeatureIndexManager(context, geoPackage, featureDao, false); indexer.setIndexLocation(FeatureIndexType.GEOPACKAGE); int indexedCount = indexer.index(); // Query Indexed Features in paginated chunks FeatureIndexResults indexResults = indexer.queryForChunk(boundingBox, projection, 50); FeaturePaginatedCursor paginatedCursor = indexer .paginate(indexResults); for (FeatureRow featureRow : paginatedCursor) { GeoPackageGeometryData geometryData = featureRow.getGeometry(); if (geometryData != null && !geometryData.isEmpty()) { Geometry geometry = geometryData.getGeometry(); // ... } } // Feature Tile Provider (dynamically draw tiles from features) FeatureTiles featureTiles = new DefaultFeatureTiles(context, featureDao, context.getResources().getDisplayMetrics().density, false); featureTiles.setMaxFeaturesPerTile(1000); // Set max features to draw per tile NumberFeaturesTile numberFeaturesTile = new NumberFeaturesTile(context); // Custom feature tile implementation featureTiles.setMaxFeaturesTileDraw(numberFeaturesTile); // Draw feature count tiles when max features passed featureTiles.setIndexManager(indexer); // Set index manager to query feature indices FeatureOverlay featureOverlay = new FeatureOverlay(featureTiles); featureOverlay.setMinZoom(featureDao.getZoomLevel()); // Set zoom level to start showing tiles TileOverlayOptions featureOverlayOptions = new TileOverlayOptions(); featureOverlayOptions.tileProvider(featureOverlay); featureOverlayOptions.zIndex(-1); // Draw the feature tiles behind map markers map.addTileOverlay(featureOverlayOptions); // URL Tile Generator (generate tiles from a URL) TileGenerator urlTileGenerator = new UrlTileGenerator(context, geoPackage, "url_tile_table", "http://url/{z}/{x}/{y}.png", 0, 0, boundingBox, projection); int urlTileCount = urlTileGenerator.generateTiles(); // Feature Tile Generator (generate tiles from features) TileGenerator featureTileGenerator = new FeatureTileGenerator(context, geoPackage, "tiles_" + featureTable, featureTiles, 1, 2, boundingBox, projection); int featureTileCount = featureTileGenerator.generateTiles(); // Close feature tiles (and indexer) featureTiles.close(); // Close database when done geoPackage.close();