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Use a symbol style to display a graphic on a graphics overlay.

Image of Style graphics with symbols

Use case

Allows you to customize a graphic by assigning a unique symbol. For example, you may wish to display individual graphics for different landmarks across a region, and to style each one with a unique symbol.

How to use the sample

Pan and zoom around the map. Observe the graphics on the map.

How it works

  1. Create a GraphicsOverlay and add it to the MapView.
  2. Create a Symbol such as SimpleMarkerSymbol, SimpleLineSymbol or SimpleFillSymbol.
  3. Create a Graphic, specifying a Geometry and a Symbol.
  4. Add the Graphic to the GraphicsOverlay.

Relevant API

  • Geometry
  • Graphic
  • GraphicsOverlay
  • SimpleFillSymbol
  • SimpleLineSymbol
  • SimpleMarkerSymbol

Additional information

To set a symbol style across a number of graphics (e.g. showing trees as graphics sharing a symbol in a park), see the "Add graphics with renderer" sample.

Tags

display, fill, graphics, line, marker, overlay, point, symbol

Sample Code

MainActivity.kt
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278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 /* Copyright 2022 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.stylegraphicswithsymbols  import android.os.Bundle import com.esri.arcgismaps.sample.sampleslib.EdgeToEdgeCompatActivity import androidx.databinding.DataBindingUtil import com.arcgismaps.ApiKey import com.arcgismaps.ArcGISEnvironment import com.arcgismaps.Color import com.arcgismaps.geometry.Point import com.arcgismaps.geometry.Polygon import com.arcgismaps.geometry.PolygonBuilder import com.arcgismaps.geometry.Polyline import com.arcgismaps.geometry.PolylineBuilder import com.arcgismaps.geometry.SpatialReference import com.arcgismaps.mapping.ArcGISMap import com.arcgismaps.mapping.BasemapStyle import com.arcgismaps.mapping.Viewpoint import com.arcgismaps.mapping.symbology.HorizontalAlignment import com.arcgismaps.mapping.symbology.SimpleFillSymbol import com.arcgismaps.mapping.symbology.SimpleFillSymbolStyle import com.arcgismaps.mapping.symbology.SimpleLineSymbol import com.arcgismaps.mapping.symbology.SimpleLineSymbolStyle import com.arcgismaps.mapping.symbology.SimpleMarkerSymbol import com.arcgismaps.mapping.symbology.SimpleMarkerSymbolStyle import com.arcgismaps.mapping.symbology.TextSymbol import com.arcgismaps.mapping.symbology.VerticalAlignment import com.arcgismaps.mapping.view.Graphic import com.arcgismaps.mapping.view.GraphicsOverlay import com.esri.arcgismaps.sample.stylegraphicswithsymbols.databinding.StyleGraphicsWithSymbolsActivityMainBinding  class MainActivity : EdgeToEdgeCompatActivity() {   override fun onCreate(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.ACCESS_TOKEN)   // set up data binding for the activity  val activityMainBinding: StyleGraphicsWithSymbolsActivityMainBinding =  DataBindingUtil.setContentView(this, R.layout.style_graphics_with_symbols_activity_main)  val mapView = activityMainBinding.mapView  lifecycle.addObserver(mapView)   // create the graphics overlay  val graphicsOverlay = GraphicsOverlay()   mapView.apply {  // create a map with the BasemapStyle Oceans and display it in this view  map = ArcGISMap(BasemapStyle.ArcGISOceans)  setViewpoint(Viewpoint(56.075844, -2.681572, 100000.0))  // add the overlay to the map view  graphicsOverlays.add(graphicsOverlay)  }   // add some buoy positions to the graphics overlay  val buoyPoints = createBuoyGraphics()  graphicsOverlay.graphics.addAll(buoyPoints)   // add boat trip polyline to graphics overlay  val tripRouteGraphic = createRoute()  graphicsOverlay.graphics.add(tripRouteGraphic)   // add nesting ground polygon to graphics overlay  val nestingGround = createNestingGround()  graphicsOverlay.graphics.add(nestingGround)   // add text symbols and points to graphics overlay  val textGraphics = createTextGraphics()  graphicsOverlay.graphics.addAll(textGraphics)  }   /**  * Create Graphics for some points.  *  * @return a new graphic  */  private fun createBuoyGraphics(): Array<Graphic> {  // define the buoy locations  val buoy1Loc = Point(-2.712642647560347, 56.06281256681154, SpatialReference.wgs84())  val buoy2Loc = Point(-2.690841695957230, 56.06444173689877, SpatialReference.wgs84())  val buoy3Loc = Point(-2.669727388499094, 56.06425007340287, SpatialReference.wgs84())  val buoy4Loc = Point(-2.639515046119973, 56.06127916736989, SpatialReference.wgs84())   // create a marker symbol  val buoyMarker =  SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, Color.red, 10.0f)   // create graphics  return arrayOf(  Graphic(buoy1Loc, buoyMarker),  Graphic(buoy2Loc, buoyMarker),  Graphic(buoy3Loc, buoyMarker),  Graphic(buoy4Loc, buoyMarker)  )  }   /**  * Create graphics which display text at specific locations.  *  * @return a new graphic  */  private fun createTextGraphics(): Array<Graphic> {  // create a point geometry  val bassLocation =  Point(-2.640631, 56.078083, SpatialReference.wgs84())  val craigleithLocation =  Point(-2.720324, 56.073569, SpatialReference.wgs84())   // create text symbols  val bassRockSymbol = TextSymbol(  getString(R.string.bassrock),  Color.blue,  10.0f,  HorizontalAlignment.Left, VerticalAlignment.Bottom  )  val craigleithSymbol = TextSymbol(  getString(R.string.craigleith),  Color.blue,  10.0f,  HorizontalAlignment.Right, VerticalAlignment.Top  )   // define graphics from each geometry and symbol  val bassRockGraphic = Graphic(bassLocation, bassRockSymbol)  val craigleithGraphic = Graphic(craigleithLocation, craigleithSymbol)   return arrayOf(bassRockGraphic, craigleithGraphic)  }   /**  * Create a graphic which displays a polyline.  *  * @return a new graphic  */  private fun createRoute(): Graphic {  // define a polyline for the boat trip  val boatRoute: Polyline = getBoatTripGeometry()  // define a line symbol  val lineSymbol =  SimpleLineSymbol(SimpleLineSymbolStyle.Dash, Color.magenta, 4.0f)   // create and return a new graphic  return Graphic(boatRoute, lineSymbol)  }   /**  * Create a graphic which displays a polygon.  *  * @return a new graphic  */  private fun createNestingGround(): Graphic {  // define the polygon for the nesting ground  val nestingGround = getNestingGroundGeometry()  // define the fill symbol and outline  val outlineSymbol =  SimpleLineSymbol(SimpleLineSymbolStyle.Dash, Color.blue, 1.0f)  val fillSymbol = SimpleFillSymbol(  SimpleFillSymbolStyle.DiagonalCross, Color.green,  outlineSymbol  )   // create and return a new graphic  return Graphic(nestingGround, fillSymbol)  }   /**  * Create a polyline representing the route of the boat trip.  *  * @return a new polyline  */  private fun getBoatTripGeometry(): Polyline {  // a new point collection to make up the polyline  val boatPositionsPolylineBuilder = PolylineBuilder(SpatialReference.wgs84()) {  // add positions to the point collection  addPoint(Point(-2.718479122792677, 56.06147084563517))  addPoint(Point(-2.719680750046392, 56.06147084563517))  addPoint(Point(-2.722084004553823, 56.06214171205971))  addPoint(Point(-2.726375530459948, 56.06386674355254))  addPoint(Point(-2.726890513568683, 56.06607083814320))  addPoint(Point(-2.727062174604927, 56.06779569383808))  addPoint(Point(-2.725517225278723, 56.06875391365391))  addPoint(Point(-2.723113970771293, 56.06942465335233))  addPoint(Point(-2.719165766937657, 56.07028701581465))  addPoint(Point(-2.713672613777817, 56.07057446568132))  addPoint(Point(-2.709381087871692, 56.07095772883556))  addPoint(Point(-2.704402917820587, 56.07153261642126))  addPoint(Point(-2.698223120515766, 56.07239493172226))  addPoint(Point(-2.692386645283435, 56.07325722773041))  addPoint(Point(-2.686721831087350, 56.07335303720707))  addPoint(Point(-2.681228677927500, 56.07354465544585))  addPoint(Point(-2.676422168912640, 56.07421531177896))  addPoint(Point(-2.669899049535339, 56.07488595644139))  addPoint(Point(-2.664749218447989, 56.07574819671591))  addPoint(Point(-2.659427726324393, 56.07613140842321))  addPoint(Point(-2.654792878345778, 56.07622721075461))  addPoint(Point(-2.651359657620878, 56.07651461631978))  addPoint(Point(-2.647754775859732, 56.07708942101955))  addPoint(Point(-2.645008199279812, 56.07814320736718))  addPoint(Point(-2.643291588917362, 56.08025069360931))  addPoint(Point(-2.638656740938747, 56.08044227755186))  addPoint(Point(-2.636940130576297, 56.07881378367495))  addPoint(Point(-2.636425147467562, 56.07728102068079))  addPoint(Point(-2.637798435757522, 56.07661041769850))  addPoint(Point(-2.638656740938747, 56.07507756705851))  addPoint(Point(-2.641231656482422, 56.07479015077557))  addPoint(Point(-2.642776605808628, 56.07574819671591))  addPoint(Point(-2.645694843424792, 56.07546078543464))  addPoint(Point(-2.647239792750997, 56.07459853872940))  addPoint(Point(-2.649299725185938, 56.07268236586862))  addPoint(Point(-2.653076267983328, 56.07182005699860))  addPoint(Point(-2.655479522490758, 56.07086191340429))  addPoint(Point(-2.658741082179413, 56.07047864929729))  addPoint(Point(-2.663375930158029, 56.07028701581465))  addPoint(Point(-2.666637489846684, 56.07009538137926))  addPoint(Point(-2.670070710571584, 56.06990374599109))  addPoint(Point(-2.674190575441464, 56.06913719491074))  addPoint(Point(-2.678310440311345, 56.06808316228391))  addPoint(Point(-2.682086983108735, 56.06789151689155))  addPoint(Point(-2.686893492123596, 56.06760404701653))  addPoint(Point(-2.691185018029721, 56.06722075051504))  addPoint(Point(-2.695133221863356, 56.06702910083509))  addPoint(Point(-2.698223120515766, 56.06683745020233))  addPoint(Point(-2.701656341240667, 56.06645414607839))  addPoint(Point(-2.706119528183037, 56.06607083814320))  addPoint(Point(-2.710067732016672, 56.06559169786458))  addPoint(Point(-2.713329291705327, 56.06520838135397))  addPoint(Point(-2.716762512430227, 56.06453756828941))  addPoint(Point(-2.718307461756433, 56.06348340989081))  addPoint(Point(-2.719165766937657, 56.06281256681154))  addPoint(Point(-2.719852411082638, 56.06204587471371))  addPoint(Point(-2.719165766937657, 56.06166252294756))  addPoint(Point(-2.718307461756433, 56.06147084563517))  }   // create the polyline from the point collection  return boatPositionsPolylineBuilder.toGeometry()  }   /**  * Create a polygon from a point collection.  *  * @return a new polygon  */  private fun getNestingGroundGeometry(): Polygon {  // a new point collection to make up the polygon  val pointsPolygonBuilder = PolygonBuilder(SpatialReference.wgs84()) {  // add points to the point collection  addPoint(Point(-2.643077012566659, 56.07712534604447))  addPoint(Point(-2.642819521015944, 56.07717324600376))  addPoint(Point(-2.642540571836003, 56.07774804087097))  addPoint(Point(-2.642712232869812, 56.07792766250863))  addPoint(Point(-2.642454741319098, 56.07829887790651))  addPoint(Point(-2.641853927700763, 56.07852639525372))  addPoint(Point(-2.640974164902487, 56.07880180919243))  addPoint(Point(-2.639987113958079, 56.07881378366685))  addPoint(Point(-2.639407757968971, 56.07908919555142))  addPoint(Point(-2.638764029092183, 56.07917301616904))  addPoint(Point(-2.638485079912242, 56.07896945149566))  addPoint(Point(-2.638570910429147, 56.07820308072684))  addPoint(Point(-2.638785486721410, 56.07756841839600))  addPoint(Point(-2.639193181676709, 56.07719719596109))  addPoint(Point(-2.639944198699627, 56.07675411934114))  addPoint(Point(-2.640652300464093, 56.07673016910844))  addPoint(Point(-2.640673758093319, 56.07632301287509))  addPoint(Point(-2.640180232621116, 56.07599967986049))  addPoint(Point(-2.640244605508794, 56.07584400003405))  addPoint(Point(-2.640416266542604, 56.07578412301025))  addPoint(Point(-2.640888334385582, 56.07580807383093))  addPoint(Point(-2.641768097183858, 56.07623918605773))  addPoint(Point(-2.642197249768383, 56.07625116132851))  addPoint(Point(-2.642840978645171, 56.07661041772168))  addPoint(Point(-2.643077012566659, 56.07712534604447))  }   // create a polygon from the point collection  return pointsPolygonBuilder.toGeometry()  }   private val Color.Companion.blue: Color  get() {  return fromRgba(0, 0, 255, 255)  }   private val Color.Companion.magenta: Color  get() {  return fromRgba(255, 0, 255, 255)  } }

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