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Draw multiple geometries

Display multiple shapes on a map.
MultipleGeometriesActivity.kt
package com.mapbox.maps.testapp.examples.markersandcallouts

import android.graphics.Color
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.mapbox.maps.MapboxMap
import com.mapbox.maps.Style
import com.mapbox.maps.extension.style.expressions.dsl.generated.eq
import com.mapbox.maps.extension.style.layers.addLayer
import com.mapbox.maps.extension.style.layers.generated.*
import com.mapbox.maps.extension.style.sources.addSource
import com.mapbox.maps.extension.style.sources.generated.geoJsonSource
import com.mapbox.maps.logE
import com.mapbox.maps.testapp.databinding.ActivityMultipleGeometriesBinding
import java.net.URISyntaxException

/**
* Example showing drawing several different geometries for one source.
*/
class MultipleGeometriesActivity : AppCompatActivity() {

private lateinit var mapboxMap: MapboxMap

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

mapboxMap = binding.mapView.mapboxMap
mapboxMap.loadStyle(
Style.LIGHT
) {
createGeoJsonSource(it)
addPolygonLayer(it)
addLineStringLayer(it)
addPointLayer(it)
}
}

private fun createGeoJsonSource(loadedMapStyle: Style) {
try {
// Load data from GeoJSON file in the assets folder
loadedMapStyle.addSource(
geoJsonSource(GEOJSON_SOURCE_ID) {
data(GEOJSON_SOURCE_URL)
}
)
} catch (exception: URISyntaxException) {
logE(TAG, "Creating geojson source failed ${exception.message}")
}
}

private fun addPolygonLayer(loadedMapStyle: Style) {
// Create and style a FillLayer that uses the Polygon Feature's coordinates in the GeoJSON data
loadedMapStyle.addLayer(
fillLayer(POLYGON_LAYER_ID, GEOJSON_SOURCE_ID) {
fillColor(Color.parseColor("#4469f7"))
fillOpacity(POLYGON_OPACITY)
filter(
eq {
literal("\$type")
literal("Polygon")
}
)
}
)
}

private fun addLineStringLayer(loadedMapStyle: Style) {
// Create and style a LineLayer that uses the Line String Feature's coordinates in the GeoJSON data
loadedMapStyle.addLayer(
lineLayer(LINE_LAYER_ID, GEOJSON_SOURCE_ID) {
lineColor(Color.RED)
lineWidth(LINE_WIDTH)
filter(
eq {
literal("\$type")
literal("LineString")
}
)
}
)
}

private fun addPointLayer(loadedMapStyle: Style) {
// Create and style a Circle layer that uses the Point Feature's coordinates in the GeoJSON data
loadedMapStyle.addLayer(
circleLayer(CIRCLE_LAYER_ID, GEOJSON_SOURCE_ID) {
filter(
eq {
literal("\$type")
literal("Point")
}
)
circleColor(Color.RED)
circleRadius(CIRCLE_RADIUS)
circleStrokeWidth(CIRCLE_STROKE_WIDTH)
circleStrokeColor(Color.BLACK)
}
)
}

companion object {
private val TAG = MultipleGeometriesActivity::class.java.simpleName
private const val GEOJSON_SOURCE_ID = "geojson_sample"
private const val CIRCLE_LAYER_ID = "circle-layer"
private const val LINE_LAYER_ID = "line_string"
private const val POLYGON_LAYER_ID = "polygon"
private const val GEOJSON_SOURCE_URL = "asset://multiple_geometry_example.geojson"
private const val LINE_WIDTH = 2.0
private const val CIRCLE_RADIUS = 6.0
private const val CIRCLE_STROKE_WIDTH = 2.0
private const val POLYGON_OPACITY = 0.3
}
}
この{Type}は役に立ちましたか?