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Road events

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Navigation SDK UX Framework exposes the DashRoadInfoEvent class to observe road data like lanes, directions, categories, etc. and speed limits.

class DashRoadInfoEvent internal constructor(
    val roadInfo: DashRoadInfo?,
    val speedLimit: DashSpeedLimit,
)

DashRoadInfo contains the road description while driving.

class DashRoadInfo internal constructor(
    val countryCodeIso2: String?,
    val drivingSide: DashDrivingSide,
    val isOneWay: Boolean,
    val laneCount: Byte,
    @DashRoadClass.Type val roadClass: String?,
)
  • countryCodeIso2 - the country code (ISO-2 format) of the road.
  • drivingSide - right-hand (DashDrivingSide.DRIVING_SIDE_RIGHT) or left-hand (DashDrivingSide.DRIVING_SIDE_LEFT) traffic type.
  • isOneWay - true if current road is one-way, otherwise false.
  • laneCount - the number of lanes on the road.
  • roadClass - classify road using DashRoadClass.

DashSpeedLimit represents the current speed limit on the road.

class DashSpeedLimit internal constructor(
    val speedLimitValue: Int?,
    val speedUnit: DashSpeedLimitUnit,
)
  • speedLimitValue - the value of the speed limit, otherwise null
  • speedUnit - DashSpeedLimitUnit.MILES_PER_HOUR or DashSpeedLimitUnit.KM_PER_HOUR

The host application can observe the road info events through the Dash.controller instance.

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        lifecycleScope.launch {
            repeatOnLifecycle(Lifecycle.State.STARTED) {
                Dash.controller.observeRoadInfoEvents()
                    .collect { /* DashRoadInfoEvent */ event ->
                        // Do something with the DashRoadInfoEvent
                        processRoadInfoEvents(event)
                    }
            }
        }
    }

    fun processRoadInfoEvents(event: DashRoadInfoEvent) {
        Toast.makeText(
            this,
            "Showing road info: $event ",
            Toast.LENGTH_SHORT
        ).show()
    }
}
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