LOW_SPEED_COLLISION_WARNING_STATE
What it is
Low Speed Collision Warning state.
Returns the current state of Low Speed Collision Warning. This property must always return a valid state defined in LowSpeedCollisionWarningState or ErrorState. It must not surface errors through StatusCode and must use the supported error states instead. This property is different from the pre-existing FORWARD_COLLISION_WARNING_STATE, which should apply to higher speed applications only. If the vehicle doesn't have a separate collision detection system for low speed environments, this property should not be implemented.
For the global area ID (0), the VehicleAreaConfig#supportedEnumValues array must be defined unless all states of both LowSpeedCollisionWarningState (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 0x11401022 apart:
| Field | Mask | Value | Means |
|---|---|---|---|
| Group | 0xf0000000 | 0x10000000 | SYSTEM |
| Area | 0x0f000000 | 0x01000000 | GLOBAL |
| Type | 0x00ff0000 | 0x00400000 | INT32 |
| Ordinal | 0x0000ffff | 0x00001022 | 0x1022 |
Reading it from an app
CarPropertyManager mgr = (CarPropertyManager)
car.getCarManager(Car.PROPERTY_SERVICE);
int value =
mgr.getIntProperty(VehiclePropertyIds.LOW_SPEED_COLLISION_WARNING_STATE, 0);This property is read-only — writes are rejected. It fires a callback whenever the value changes.