AARouteCallback

Callback interface for Android Auto route preview and destination selection events.

This interface handles all route-related interactions on Android Auto: destination selection from search, route selection from alternatives, route cancellation, and map recentering on the route.

Responsibility

Manages route preview events:

• Destination selection from search results

• Route alternative selection

• Route preview cancellation

• Map recentering on route bounding box

Callers

Methods in this interface are called by:

• AndroidAutoSearchScreen: onDestinationSelected

• AndroidAutoRoutePreviewScreen: onAARouteSelected, onAARouteCancelled, onAARecenterOnRoute

• AndroidAutoNavigationScreen: onAARouteCancelled

Route Flow

1. User searches for destination → selects result → onDestinationSelected

2. Routes are computed and displayed → user selects alternative → onAARouteSelected

3. User can recenter map on route → onAARecenterOnRoute

4. User can cancel route preview → onAARouteCancelled

Usage

class MyCallback : AARouteCallback {
    override fun onDestinationSelected(latitude: Double, longitude: Double, title: String) {
        // Show POI marker, compute routes
    }

    override fun onAARouteSelected(index: Int) {
        // Update selected route polyline
    }

    override fun onAARouteCancelled() {
        // Clear routes, return to map view
    }

    override fun onAARecenterOnRoute() {
        // Fit map to route bounding box
    }
}

See also

Inheritors