Displays & HMI

HW_KEY_INPUT

What it is

Property to feed H/W input events to android

int32Values[0] : action defined by VehicleHwKeyInputAction int32Values[1] : key code, must use standard android key code int32Values[2] : target display defined in VehicleDisplay. Events not tied to specific display must be sent to VehicleDisplay#MAIN. int32Values[3] : [optional] Number of ticks. The value must be equal or greater than 1. When omitted, Android will default to 1.

How the ID is built

A property ID is a 32-bit value packing four fields. Reading 0x11410a10 apart:

Field	Mask	Value	Means
Group	0xf0000000	0x10000000	SYSTEM
Area	0x0f000000	0x01000000	GLOBAL
Type	0x00ff0000	0x00410000	INT32_VEC
Ordinal	0x0000ffff	0x00000a10	0xa10

Reading it from an app

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

CarPropertyValue<Integer> value =
        mgr.getProperty(VehiclePropertyIds.HW_KEY_INPUT, 0);

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