Fetch routes between an origin and destination
Note
This example is a part of the Navigation SDK Examples. You can find the values for all referenced resources in the res directory. For example, see res/values/strings.xml for R.string.* references used in this example.
mapbox_activity_fetch_a_route
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:id="@+id/responseContainer"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="@id/fetchARouteButton"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/responseTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
android:text="ready for request"
tools:ignore="HardcodedText" />
</ScrollView>
<androidx.appcompat.widget.AppCompatButton
android:id="@+id/fetchARouteButton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:background="@drawable/mapbox_button"
android:padding="12dp"
android:textAllCaps="false"
android:textColor="@android:color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
FetchARouteActivity.kt
package com.mapbox.navigation.examples.standalone.fetchroute
import android.annotation.SuppressLint
import android.location.Location
import android.os.Bundle
import android.util.Log
import android.view.View.GONE
import android.view.View.VISIBLE
import androidx.appcompat.app.AppCompatActivity
import com.google.gson.GsonBuilder
import com.google.gson.JsonParser
import com.mapbox.api.directions.v5.models.Bearing
import com.mapbox.api.directions.v5.models.RouteOptions
import com.mapbox.geojson.Point
import com.mapbox.navigation.base.ExperimentalPreviewMapboxNavigationAPI
import com.mapbox.navigation.base.extensions.applyDefaultNavigationOptions
import com.mapbox.navigation.base.extensions.applyLanguageAndVoiceUnitOptions
import com.mapbox.navigation.base.options.NavigationOptions
import com.mapbox.navigation.base.route.NavigationRoute
import com.mapbox.navigation.base.route.NavigationRouterCallback
import com.mapbox.navigation.base.route.RouterFailure
import com.mapbox.navigation.base.route.RouterOrigin
import com.mapbox.navigation.core.MapboxNavigation
import com.mapbox.navigation.core.lifecycle.MapboxNavigationApp
import com.mapbox.navigation.core.lifecycle.requireMapboxNavigation
import com.mapbox.navigation.examples.R
import com.mapbox.navigation.examples.databinding.MapboxActivityFetchARouteBinding
import com.mapbox.navigation.examples.standalone.location.ShowCurrentLocationActivity
/**
* The example demonstrates given a pair of coordinates how to fetch a route.
*
* Before running the example make sure you do the following:
* - Put your access_token in the correct place inside [app/src/main/res/values/mapbox_access_token.xml].
* If not present then add this file at the location mentioned above and add the following
* content to it.
* <?xml version="1.0" encoding="utf-8"?>
* <resources xmlns:tools="http://schemas.android.com/tools">
* <string name="mapbox_access_token">YOUR_ACCESS_TOKEN_HERE</string>
* </resources>
* - Add MAPBOX_DOWNLOADS_TOKEN to your USER_HOME»/.gradle/gradle.properties file.
* To find out how to get your MAPBOX_DOWNLOADS_TOKEN follow these steps.
* https://docs.mapbox.com/android/beta/navigation/guides/install/#configure-credentials
*
* For the purposes of this example the code will not hook onto your current
* location. Origin and destination coordinates will be hardcoded. To understand how to
* listen to your own location updates go through this example [ShowCurrentLocationActivity]
*
* How to use this example:
* - Click on the example with title (Fetch routes between origin and destination) from the list of examples.
* - You should see a map view and a button.
* - Tap on the button that says Fetch A Route.
* - The button should disappear and you should see a result in a text view
*
* Note: The aim of this example is to only show how to request a route. Once the route is
* requested, neither it is drawn nor any after affects are reflected on the map.
*/
@OptIn(ExperimentalPreviewMapboxNavigationAPI::class)
class FetchARouteActivity : AppCompatActivity() {
private companion object {
private const val LOG_TAG = "FetchARouteActivity"
}
/**
* Bindings to the example layout.
*/
private val binding: MapboxActivityFetchARouteBinding by lazy {
MapboxActivityFetchARouteBinding.inflate(layoutInflater)
}
private val originLocation = Location("test").apply {
longitude = -122.4192
latitude = 37.7627
bearing = 10f
}
private val destination = Point.fromLngLat(-122.4106, 37.7676)
/**
* Mapbox Navigation entry point. There should only be one instance of this object for the app.
*/
private val mapboxNavigation: MapboxNavigation by requireMapboxNavigation(
onInitialize = this::initNavigation
)
@SuppressLint("SetTextI18n")
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(binding.root)
binding.fetchARouteButton.text = "Fetch A Route"
binding.fetchARouteButton.setOnClickListener { fetchARoute() }
}
private fun initNavigation() {
MapboxNavigationApp.setup(
NavigationOptions.Builder(this)
.accessToken(getString(R.string.mapbox_access_token))
.build()
)
}
/**
* The method instantiates a [RouteOptions] object and fetches route between the origin and
* destination pair. There are several [RouteOptions] that you can specify, but this example
* mentions only what is relevant.
*/
@SuppressLint("SetTextI18n")
private fun fetchARoute() {
binding.responseTextView.text = "fetching route..."
val originPoint = Point.fromLngLat(
originLocation.longitude,
originLocation.latitude
)
val routeOptions = RouteOptions.builder()
// applies the default parameters to route options
.applyDefaultNavigationOptions()
.applyLanguageAndVoiceUnitOptions(this)
// lists the coordinate pair i.e. origin and destination
// If you want to specify waypoints you can pass list of points instead of null
.coordinatesList(listOf(originPoint, destination))
// set it to true if you want to receive alternate routes to your destination
.alternatives(false)
// provide the bearing for the origin of the request to ensure
// that the returned route faces in the direction of the current user movement
.bearingsList(
listOf(
Bearing.builder()
.angle(originLocation.bearing.toDouble())
.degrees(45.0)
.build(),
null
)
)
.build()
mapboxNavigation.requestRoutes(
routeOptions,
object : NavigationRouterCallback {
override fun onCanceled(routeOptions: RouteOptions, routerOrigin: RouterOrigin) {
// This particular callback is executed if you invoke
// mapboxNavigation.cancelRouteRequest()
binding.responseTextView.text = "route request canceled"
binding.fetchARouteButton.visibility = VISIBLE
}
override fun onFailure(reasons: List<RouterFailure>, routeOptions: RouteOptions) {
binding.responseTextView.text =
"""
route request failed with:
$reasons
""".trimIndent()
Log.e(LOG_TAG, "route request failed with $reasons")
binding.fetchARouteButton.visibility = VISIBLE
}
override fun onRoutesReady(
routes: List<NavigationRoute>,
routerOrigin: RouterOrigin
) {
// GSON instance used only to print the response prettily
val gson = GsonBuilder().setPrettyPrinting().create()
val json = routes.map {
gson.toJson(
JsonParser.parseString(it.directionsRoute.toJson())
)
}
binding.responseTextView.text =
"""
|routes ready (origin: ${routerOrigin::class.simpleName}):
|$json
""".trimMargin()
}
}
)
binding.fetchARouteButton.visibility = GONE
}
}
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