DirectionsManager (Situm Android SDK 3.21.0)

```
public interface DirectionsManager
```
Allows route calculation between two points, usually from current user's location.
Codes of all Errors returned by this manager are declared in CommonErrorConstant.Code and DirectionsManager.Code

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static interface`	`DirectionsManager.Code`	The error codes received in `Handler.onFailure(Error)` on the `DirectionsManager`
`static interface`	`DirectionsManager.PropertyKey`

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`requestDirections(DirectionsRequest request, Handler<Route> callback)`	Calculates a route between two points.

- Method Detail
  - requestDirections
```
boolean requestDirections(@NonNull
                          DirectionsRequest request,
                          @NonNull
                          Handler<Route> callback)
                   throws java.lang.IllegalArgumentException
```
    Calculates a route between two points. The result is provided asynchronously using the callback.
    
    Parameters:
    
    request - non-null search parameters. 'from' and 'to' can't be null, and points have to be inside the same building. If the origin bearing is unknown 'bearingFrom' should be null.
    
    callback - object used to provide the result. Errors are declared in CommonErrorConstant.Code and DirectionsManager.Code
    
    Returns:
    
    true if the async calculus has started correctly. False otherwise.
    
    Throws:
    
    java.lang.IllegalArgumentException - some required argument is null, or request's points (DirectionsRequest.getTo(), DirectionsRequest.getFrom()) are not in the same building.