Multi map
This example showcases the usage of multiple MapboxMap instances in the same screen. It includes two MapboxMap components within a Column layout, each displaying location annotations with different colors. The app sets the map styles to dark or light using MapStyle. Location annotations are added using ViewAnnotation with defined geometries and styling options.
Asynchronous operations using LaunchedEffect and launch from Kotlin coroutines are employed to update the location annotation lists after certain delays, 1000 and 2000 milliseconds respectively. The state of the lists is managed using mutableStateOf and remember to trigger UI updates. Additionally, Point from the com.mapbox.geojson package is used to represent geospatial points, and CityLocations is imported from the example's utilities to reference Helsinki's coordinates.
This example code is part of the Maps SDK for Android Examples App, a working Android project available on GitHub. Android developers are encouraged to run the examples app locally to interact with this example in an emulator and explore other features of the Maps SDK.
See our Run the Maps SDK for Android Examples App tutorial for step-by-step instructions.
package com.mapbox.maps.compose.testapp.examples.basic
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.material.Text
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import com.mapbox.geojson.Point
import com.mapbox.maps.Style
import com.mapbox.maps.compose.testapp.ExampleScaffold
import com.mapbox.maps.compose.testapp.examples.utils.CityLocations
import com.mapbox.maps.compose.testapp.ui.theme.MapboxMapComposeTheme
import com.mapbox.maps.extension.compose.MapboxMap
import com.mapbox.maps.extension.compose.animation.viewport.rememberMapViewportState
import com.mapbox.maps.extension.compose.annotation.ViewAnnotation
import com.mapbox.maps.extension.compose.style.MapStyle
import com.mapbox.maps.viewannotation.geometry
import com.mapbox.maps.viewannotation.viewAnnotationOptions
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
/**
* Example to showcase usage of multiple of MapboxMap in the same screen.
*/
public class MultiMapActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
var viewAnnotationList1 by remember { mutableStateOf(emptyList<Point>()) }
var viewAnnotationList2 by remember { mutableStateOf(emptyList<Point>()) }
LaunchedEffect(Unit) {
launch {
delay(1000L)
viewAnnotationList1 = points1
viewAnnotationList2 = points1
}
launch {
delay(2000L)
viewAnnotationList2 = points1 + points2
}
}
MapboxMapComposeTheme {
ExampleScaffold {
Column(modifier = Modifier.padding(it)) {
MapboxMap(
modifier = Modifier
.weight(1f)
.fillMaxWidth(),
mapViewportState = rememberMapViewportState {
setCameraOptions {
zoom(ZOOM)
center(CityLocations.HELSINKI)
}
},
style = {
MapStyle(style = Style.DARK)
}
) {
viewAnnotationList1.forEachIndexed { index, point ->
ViewAnnotation(
options = viewAnnotationOptions {
geometry(point)
allowOverlap(true)
}
) {
Text(text = "Annotation $index", color = Color.Red)
}
}
}
MapboxMap(
modifier = Modifier
.weight(1f)
.fillMaxWidth(),
mapViewportState = rememberMapViewportState {
setCameraOptions {
zoom(ZOOM)
center(CityLocations.HELSINKI)
}
},
style = {
MapStyle(style = Style.LIGHT)
}
) {
viewAnnotationList2.forEachIndexed { index, point ->
ViewAnnotation(
options = viewAnnotationOptions {
geometry(point)
allowOverlap(true)
}
) {
Text(text = "Annotation $index", color = Color.Blue)
}
}
}
}
}
}
}
}
private companion object {
const val ZOOM: Double = 13.0
val points1 = listOf(
Point.fromLngLat(24.94216010242652, 60.16876757234266),
Point.fromLngLat(24.929766009141733, 60.170292490574944),
)
val points2 = listOf(
Point.fromLngLat(24.947481155604, 60.1731440090149),
Point.fromLngLat(24.937481155604, 60.1631440090149)
)
}
}