Add markers to map | Maps SDK | Android Docs

Add markers that use different icons.
There are several ways to add markers, annotations, and other shapes to the map using the Maps SDK. To choose the appropriate approach for your application, read the Markers and annotations guide.
Kotlin
AddMarkersSymbolActivity.kt
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package com.mapbox.maps.testapp.examples.markersandcallouts

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.ContextCompat
import androidx.core.graphics.drawable.toBitmap
import com.mapbox.geojson.Feature
import com.mapbox.geojson.FeatureCollection
import com.mapbox.geojson.Point
import com.mapbox.maps.Style
import com.mapbox.maps.extension.style.expressions.dsl.generated.match
import com.mapbox.maps.extension.style.image.image
import com.mapbox.maps.extension.style.layers.generated.symbolLayer
import com.mapbox.maps.extension.style.layers.properties.generated.IconAnchor
import com.mapbox.maps.extension.style.sources.generated.geoJsonSource
import com.mapbox.maps.extension.style.style
import com.mapbox.maps.testapp.R
import com.mapbox.maps.testapp.databinding.ActivityAddMarkerSymbolBinding

/**
 * Example showing how to add 2 different markers based on their type
 */
class AddMarkersSymbolActivity : AppCompatActivity() {

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val binding = ActivityAddMarkerSymbolBinding.inflate(layoutInflater)
    setContentView(binding.root)

    binding.mapView.mapboxMap.loadStyle(
      styleExtension = style(Style.STANDARD) {
        // prepare red marker from resources
        +image(
          RED_ICON_ID,
          ContextCompat.getDrawable(this@AddMarkersSymbolActivity, R.drawable.ic_red_marker)!!.toBitmap()
        )
        // prepare blue marker from resources
        +image(
          BLUE_ICON_ID,
          ContextCompat.getDrawable(this@AddMarkersSymbolActivity, R.drawable.ic_blue_marker)!!.toBitmap()
        )
        // prepare source that will hold icons and add extra string property to each of it
        // to identify what marker icon should be used
        +geoJsonSource(SOURCE_ID) {
          featureCollection(
            FeatureCollection.fromFeatures(
              arrayOf(
                Feature.fromGeometry(
                  Point.fromLngLat(
                    12.554729,
                    55.70651
                  )
                ).apply {
                  addStringProperty(ICON_KEY, ICON_RED_PROPERTY)
                },
                Feature.fromGeometry(
                  Point.fromLngLat(
                    12.65147,
                    55.608166
                  )
                ).apply {
                  addStringProperty(ICON_KEY, ICON_BLUE_PROPERTY)
                }
              )
            )
          )
        }
        // finally prepare symbol layer with
        // if get(ICON_KEY) == ICON_RED_PROPERTY
        //  then
        //    RED_MARKER
        //  else if get(ICON_KEY) == ICON_BLUE_PROPERTY
        //    BLUE_MARKER
        //  else
        //    RED_MARKER
        // rotate the blue marker with 45 degrees.
        +symbolLayer(LAYER_ID, SOURCE_ID) {
          iconImage(
            match {
              get {
                literal(ICON_KEY)
              }
              stop {
                literal(ICON_RED_PROPERTY)
                literal(RED_ICON_ID)
              }
              stop {
                literal(ICON_BLUE_PROPERTY)
                literal(BLUE_ICON_ID)
              }
              literal(RED_ICON_ID)
            }
          )
          iconRotate(
            match {
              get {
                literal(ICON_KEY)
              }
              stop {
                literal(ICON_BLUE_PROPERTY)
                literal(45.0)
              }
              literal(0.0)
            }
          )
          iconAllowOverlap(true)
          iconAnchor(IconAnchor.BOTTOM)
        }
      }
    )
  }

  companion object {
    private const val RED_ICON_ID = "red"
    private const val BLUE_ICON_ID = "blue"
    private const val SOURCE_ID = "source_id"
    private const val LAYER_ID = "layer_id"
    private const val ICON_KEY = "icon_key"
    private const val ICON_RED_PROPERTY = "icon_red_property"
    private const val ICON_BLUE_PROPERTY = "icon_blue_property"
  }
}
この{Type}は役に立ちましたか？