Animate Marker Position
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.
package com.mapbox.maps.testapp.examples.markersandcallouts
import android.animation.TypeEvaluator
import android.animation.ValueAnimator
import android.os.Bundle
import android.widget.Toast
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.Point
import com.mapbox.maps.Style
import com.mapbox.maps.extension.style.image.image
import com.mapbox.maps.extension.style.layers.generated.symbolLayer
import com.mapbox.maps.extension.style.sources.generated.GeoJsonSource
import com.mapbox.maps.extension.style.sources.generated.geoJsonSource
import com.mapbox.maps.extension.style.style
import com.mapbox.maps.plugin.gestures.OnMapClickListener
import com.mapbox.maps.plugin.gestures.addOnMapClickListener
import com.mapbox.maps.plugin.gestures.removeOnMapClickListener
import com.mapbox.maps.testapp.R
import com.mapbox.maps.testapp.databinding.ActivityAnimatedMarkerBinding
/**
* Example of animating a map marker on click.
*/
class AnimatedMarkerActivity : AppCompatActivity(), OnMapClickListener {
private lateinit var geojsonSource: GeoJsonSource
private var currentPoint = Point.fromLngLat(-18.167040, 64.900932)
private var animator: ValueAnimator? = null
private lateinit var binding: ActivityAnimatedMarkerBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityAnimatedMarkerBinding.inflate(layoutInflater)
setContentView(binding.root)
geojsonSource = geoJsonSource("source-id") {
feature(Feature.fromGeometry(currentPoint))
}
val mapboxMap = binding.mapView.mapboxMap
mapboxMap.loadStyle(
style(Style.SATELLITE_STREETS) {
+image(
"marker_icon",
ContextCompat.getDrawable(this@AnimatedMarkerActivity, R.drawable.ic_red_marker)!!.toBitmap()
)
+geojsonSource
+symbolLayer(layerId = "layer-id", sourceId = "source-id") {
iconImage("marker_icon")
iconIgnorePlacement(true)
iconAllowOverlap(true)
}
}
) {
Toast.makeText(
this@AnimatedMarkerActivity,
getString(R.string.tap_on_map_instruction),
Toast.LENGTH_LONG
).show()
mapboxMap.addOnMapClickListener(this@AnimatedMarkerActivity)
}
}
override fun onMapClick(point: Point): Boolean {
// When the user clicks on the map, we want to animate the marker to that location.
animator?.let {
if (it.isStarted) {
currentPoint = it.animatedValue as Point
it.cancel()
}
}
val pointEvaluator = TypeEvaluator<Point> { fraction, startValue, endValue ->
Point.fromLngLat(
startValue.longitude() + fraction * (endValue.longitude() - startValue.longitude()),
startValue.latitude() + fraction * (endValue.latitude() - startValue.latitude())
)
}
animator = ValueAnimator().apply {
setObjectValues(currentPoint, point)
setEvaluator(pointEvaluator)
addUpdateListener {
geojsonSource.geometry(it.animatedValue as Point)
}
duration = 2000
start()
}
currentPoint = point
return true
}
override fun onDestroy() {
super.onDestroy()
animator?.cancel()
binding.mapView.mapboxMap.removeOnMapClickListener(this)
}
}
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