HANDS_ON_DETECTION_WARNING
What it is
Hands On Detection (HOD) warning.
Returns whether a warning is being sent to the driver for having their hands off the wheel for too long a duration.
Generally, this property should return a valid state defined in HandsOnDetectionWarning or ErrorState. For example, if the feature is not available due to some temporary state, that information should be conveyed through an ErrorState.
For the global area ID (0), the VehicleAreaConfig#supportedEnumValues array must be defined unless all states of both HandsOnDetectionWarning (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 0x11401018 apart:
| Field | Mask | Value | Means |
|---|---|---|---|
| Group | 0xf0000000 | 0x10000000 | SYSTEM |
| Area | 0x0f000000 | 0x01000000 | GLOBAL |
| Type | 0x00ff0000 | 0x00400000 | INT32 |
| Ordinal | 0x0000ffff | 0x00001018 | 0x1018 |
Reading it from an app
CarPropertyManager mgr = (CarPropertyManager)
car.getCarManager(Car.PROPERTY_SERVICE);
int value =
mgr.getIntProperty(VehiclePropertyIds.HANDS_ON_DETECTION_WARNING, 0);This property is read-only — writes are rejected. It fires a callback whenever the value changes.