LANE_KEEP_ASSIST_STATE
What it is
Lane Keep Assist (LKA) state.
Returns the current state of LKA. This property must always return a valid state defined in LaneKeepAssistState or ErrorState. It must not surface errors through StatusCode and must use the supported error states instead.
If LKA includes lane departure warnings before applying steering corrections, those warnings must be surfaced through the Lane Departure Warning (LDW) properties.
For the global area ID (0), the VehicleAreaConfig#supportedEnumValues array must be defined unless all states of both LaneKeepAssistState (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 0x11401009 apart:
| Field | Mask | Value | Means |
|---|---|---|---|
| Group | 0xf0000000 | 0x10000000 | SYSTEM |
| Area | 0x0f000000 | 0x01000000 | GLOBAL |
| Type | 0x00ff0000 | 0x00400000 | INT32 |
| Ordinal | 0x0000ffff | 0x00001009 | 0x1009 |
Reading it from an app
CarPropertyManager mgr = (CarPropertyManager)
car.getCarManager(Car.PROPERTY_SERVICE);
int value =
mgr.getIntProperty(VehiclePropertyIds.LANE_KEEP_ASSIST_STATE, 0);This property is read-only — writes are rejected. It fires a callback whenever the value changes.