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Raw GeoJSON

Use a GeoJSON string as data for a GeoJSON source through Value API.
RawGeoJsonActivity.kt
package com.mapbox.maps.testapp.examples

import android.graphics.Color
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.mapbox.bindgen.Value
import com.mapbox.geojson.Point
import com.mapbox.maps.CameraOptions
import com.mapbox.maps.MapView
import com.mapbox.maps.MapboxMap
import com.mapbox.maps.Style
import com.mapbox.maps.extension.style.layers.addLayer
import com.mapbox.maps.extension.style.layers.generated.circleLayer

/**
* Example showcasing raw geojson conversion support through the Value API.
* This converts the following geojson to a value object:
* ```
* {
* "type": "FeatureCollection",
* "features": [
* {
* "type": "Feature",
* "properties": {},
* "geometry": {
* "type": "Point",
* "coordinates": [
* 6.0033416748046875,
* 43.70908256335716
* ]
* }
* }
* ]
* }
* ```
*/
class RawGeoJsonActivity : AppCompatActivity() {

private lateinit var mapboxMap: MapboxMap

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val mapView = MapView(this)
setContentView(mapView)
mapboxMap = mapView.mapboxMap.apply {
setCamera(
CameraOptions.Builder()
.center(Point.fromLngLat(6.0033416748046875, 43.70908256335716))
.zoom(16.0)
.build()
)
loadStyle(Style.STANDARD) { addGeoJsonSource(it) }
}
}

private fun addGeoJsonSource(style: Style) {
val geojson = Value.fromJson(
"""
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [
6.0033416748046875,
43.70908256335716
]
}
}
]
}
""".trimIndent()
)

if (geojson.isError) {
throw RuntimeException("Invalid GeoJson:" + geojson.error)
}

val sourceParams = HashMap<String, Value>()
sourceParams["type"] = Value("geojson")
sourceParams["data"] = geojson.value!!
val expected = style.addStyleSource("source", Value(sourceParams))

if (expected.isError) {
throw RuntimeException("Invalid GeoJson:" + expected.error)
}

style.addLayer(
circleLayer("circle", "source") {
circleColor(Color.BLACK)
circleRadius(10.0)
}
)
}
}
この{Type}は役に立ちましたか?