Use style imports
This example demonstrates the usage of style imports within the Mapbox Maps SDK for Android.
Three FloatingActionButton controls are displayed to enable or disable the STANDARD and SATELLITE styles, and toggle the display of a background layer on the map. The background layer is in the top slot and thus is rendered above the base map style.
Android Examples App Available
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.
StyleImportsActivity.kt
package com.mapbox.maps.compose.testapp.examples.style
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.FloatingActionButton
import androidx.compose.material.Text
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 androidx.compose.ui.unit.dp
import com.mapbox.bindgen.Value
import com.mapbox.geojson.Point
import com.mapbox.maps.MapboxExperimental
import com.mapbox.maps.Style
import com.mapbox.maps.compose.testapp.ExampleScaffold
import com.mapbox.maps.compose.testapp.ui.theme.MapboxMapComposeTheme
import com.mapbox.maps.dsl.cameraOptions
import com.mapbox.maps.extension.compose.MapboxMap
import com.mapbox.maps.extension.compose.animation.viewport.rememberMapViewportState
import com.mapbox.maps.extension.compose.style.ColorValue
import com.mapbox.maps.extension.compose.style.DoubleValue
import com.mapbox.maps.extension.compose.style.GenericStyle
import com.mapbox.maps.extension.compose.style.importConfigs
import com.mapbox.maps.extension.compose.style.imports.rememberStyleImportState
import com.mapbox.maps.extension.compose.style.layers.generated.BackgroundLayer
import com.mapbox.maps.extension.compose.style.slotsContent
import com.mapbox.maps.interactions.FeatureState
import com.mapbox.maps.interactions.FeatureStateKey
import com.mapbox.maps.interactions.FeaturesetFeature
/**
* Example to showcase usage of style imports.
*/
@OptIn(MapboxExperimental::class)
public class StyleImportsActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
var showSatelliteImport by remember {
mutableStateOf(true)
}
var showStandardImport by remember {
mutableStateOf(true)
}
var showBackgroundLayer by remember {
mutableStateOf(true)
}
MapboxMapComposeTheme {
ExampleScaffold(
floatingActionButton = {
Column {
FloatingActionButton(
modifier = Modifier.padding(bottom = 10.dp),
onClick = {
showStandardImport = !showStandardImport
},
shape = RoundedCornerShape(16.dp),
) {
Text(
modifier = Modifier.padding(10.dp),
text = "Toggle standard import to ${if (showStandardImport) "disabled" else "enabled"}"
)
}
FloatingActionButton(
modifier = Modifier.padding(bottom = 10.dp),
onClick = {
showSatelliteImport = !showSatelliteImport
},
shape = RoundedCornerShape(16.dp),
) {
Text(
modifier = Modifier.padding(10.dp),
text = "Toggle satellite import to ${if (showSatelliteImport) "disabled" else "enabled"}"
)
}
FloatingActionButton(
modifier = Modifier.padding(bottom = 10.dp),
onClick = {
showBackgroundLayer = !showBackgroundLayer
},
shape = RoundedCornerShape(16.dp),
) {
Text(
modifier = Modifier.padding(10.dp),
text = "Toggle background layer at top slot to ${if (showBackgroundLayer) "disabled" else "enabled"}"
)
}
}
}
) {
MapboxMap(
Modifier.fillMaxSize(),
mapViewportState = rememberMapViewportState {
setCameraOptions(
cameraOptions {
center(Point.fromLngLat(-73.99, 40.72))
zoom(11.0)
pitch(45.0)
}
)
},
style = {
GenericStyle(
/*
* Load the map with an empty style.
* The map will use `StyleImport`s to load the desired styles.
*/
style = "",
styleImportsContent = {
if (showStandardImport) {
StyleImport(
importId = STANDARD_STYLE_IMPORT_ID,
style = "asset://fragment-realestate-NY.json",
styleImportState = rememberStyleImportState {
importConfigs = importConfigs {
config("showTransitLabels", Value(false))
}
var selectedPriceLabel: FeaturesetFeature<FeatureState>? =
null
interactionsState
.onFeaturesetClicked(id = "hotels-price") { priceLabel, _ ->
if (selectedPriceLabel?.id != priceLabel.id) {
selectedPriceLabel?.removeFeatureState(FeatureStateKey.create("active"))
selectedPriceLabel = priceLabel
}
val isActive = (priceLabel.state.getBooleanState("active") ?: false).not()
priceLabel.setFeatureState(
FeatureState {
addBooleanState("active", isActive)
}
)
return@onFeaturesetClicked true
}
.onMapClicked {
selectedPriceLabel?.removeFeatureState(FeatureStateKey.create("active"))
selectedPriceLabel = null
true
}
}
)
}
if (showSatelliteImport) {
StyleImport(
importId = SATELLITE_STYLE_IMPORT_ID,
style = Style.SATELLITE,
styleImportState = rememberStyleImportState()
)
}
},
slotsContent {
slot("top") {
if (showBackgroundLayer) {
BackgroundLayer {
backgroundColor = ColorValue(Color.Red)
backgroundOpacity = DoubleValue(0.5)
}
}
}
}
)
}
)
}
}
}
}
private companion object {
const val STANDARD_STYLE_IMPORT_ID = "standard"
const val SATELLITE_STYLE_IMPORT_ID = "satellite"
}
}
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