ADAS & driver assistance

EMERGENCY_LANE_KEEP_ASSIST_STATE

What it is

Emergency Lane Keep Assist (ELKA) state.

Returns the current state of ELKA. Generally, this property should return a valid state defined in the EmergencyLaneKeepAssistState or ErrorState. For example, if the feature is not available due to some temporary state, that information should be conveyed through ErrorState.

For the global area ID (0), the VehicleAreaConfig#supportedEnumValues array must be defined unless all states of EmergencyLaneKeepAssistState (including OTHER, which is not recommended) and ErrorState are supported.

How the ID is built

A property ID is a 32-bit value packing four fields. Reading 0x1140100e apart:

Field	Mask	Value	Means
Group	0xf0000000	0x10000000	SYSTEM
Area	0x0f000000	0x01000000	GLOBAL
Type	0x00ff0000	0x00400000	INT32
Ordinal	0x0000ffff	0x0000100e	0x100e

Reading it from an app

CarPropertyManager mgr = (CarPropertyManager)
        car.getCarManager(Car.PROPERTY_SERVICE);

int value =
        mgr.getIntProperty(VehiclePropertyIds.EMERGENCY_LANE_KEEP_ASSIST_STATE, 0);

This property is read-only — writes are rejected. It fires a callback whenever the value changes.