Draw a GeoJSON line

Load a polyline to a style using GeoJsonSource and display it on a map using LineLayer.

DrawGeoJsonLineActivity.kt
package com.mapbox.maps.testapp.examples.linesandpolygons
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.mapbox.geojson.Point
import com.mapbox.maps.CameraOptions
import com.mapbox.maps.MapView
import com.mapbox.maps.Style
import com.mapbox.maps.extension.style.layers.generated.lineLayer
import com.mapbox.maps.extension.style.layers.properties.generated.LineCap
import com.mapbox.maps.extension.style.layers.properties.generated.LineJoin
import com.mapbox.maps.extension.style.sources.generated.geoJsonSource
import com.mapbox.maps.extension.style.style
/**
* Load a polyline to a style using GeoJsonSource and display it on a map using LineLayer.
*/
class DrawGeoJsonLineActivity : AppCompatActivity() {
public override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val mapView = MapView(this)
setContentView(mapView)
mapView.getMapboxMap().setCamera(
CameraOptions.Builder().center(
Point.fromLngLat(
LATITUDE,
LONGITUDE
)
).zoom(ZOOM).build()
)
mapView.getMapboxMap().loadStyle(
(
style(styleUri = Style.MAPBOX_STREETS) {
+geoJsonSource(GEOJSON_SOURCE_ID) {
url("asset://from_crema_to_council_crest.geojson")
}
+lineLayer("linelayer", GEOJSON_SOURCE_ID) {
lineCap(LineCap.ROUND)
lineJoin(LineJoin.ROUND)
lineOpacity(0.7)
lineWidth(8.0)
lineColor("#888")
}
}
)
)
}
companion object {
private const val GEOJSON_SOURCE_ID = "line"
private const val LATITUDE = -122.486052
private const val LONGITUDE = 37.830348
private const val ZOOM = 14.0
}
}