Draw Shapes

Drawing requires defining sources and layers when your style has loaded, before adding Feature data to them.

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Set up sources and layers

// In MainActivity.kt after style loads
lateinit var pointSource: GeoJsonSource
lateinit var lineSource: GeoJsonSource
lateinit var polygonSource: GeoJsonSource

fun setupLayers(style: Style) {
    // For Point
    pointSource = GeoJsonSource("point-source")
    style.addSource(pointSource)
    style.addLayer(SymbolLayer("point-layer", "point-source").withProperties(
        iconImage("your-marker-id") // Make sure the icon is included in your style or added manually
    ))

    // For Line
    lineSource = GeoJsonSource("line-source")
    style.addSource(lineSource)
    style.addLayer(LineLayer("line-layer", "line-source").withProperties(
        lineColor("#ff0000"),
        lineWidth(4f)
    ))

    // For Polygon
    polygonSource = GeoJsonSource("polygon-source")
    style.addSource(polygonSource)
    style.addLayer(FillLayer("polygon-layer", "polygon-source").withProperties(
        fillColor("#00ff00"),
        fillOpacity(0.5f),
        fillOutlineColor("#ff0000")
    ))
}

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Draw a point

fun drawPoint(latLng: LatLng) {
    val point = Point.fromLngLat(latLng.longitude, latLng.latitude)
    pointSource.setGeoJson(Feature.fromGeometry(point))
}

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Draw a line

fun drawLine(linePoints: List<Point>) {
    val lineString = LineString.fromLngLats(linePoints)
    lineSource.setGeoJson(Feature.fromGeometry(lineString))
}

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Draw a polygon

fun drawPolygon(polygon: List<Point>) {
    val closed = polygon.toMutableList()
    closed.add(polygon.first()) // Ensure the polygon is closed
    val pol = Polygon.fromLngLats(listOf(closed))
    polygonSource.setGeoJson(Feature.fromGeometry(pol))
}

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See also: Android Map SDK overview.