CURRENT_GEAR should be GEAR_SELECTION

[nikagl]

Correct me if I'm wrong, but CURRENT_GEAR should be GEAR_SELECTION here:

car-samples/AutomotiveOS/CarGearViewerKotlin/automotive/src/main/java/com/example/cargearviewer/MainActivity.kt

Line 93 in f2a7a8d

VehiclePropertyIds.CURRENT_GEAR,

[Zhomart]

why do you think so?

[Zhomart]

According to VehiclePropertyIds.java, both represent the current gear. As this is just a sample code, it shouldn't matter which one. (Please let me know if you disagree)

    /**
     * Currently selected gear
     *
     * This is the gear selected by the user.
     * Requires permission: {@link Car#PERMISSION_POWERTRAIN}.
     */
    @RequiresPermission(Car.PERMISSION_POWERTRAIN)
    public static final int GEAR_SELECTION = 289408000;
    /**
     * Current gear. In non-manual case, selected gear may not
     * match the current gear. For example, if the selected gear is GEAR_DRIVE,
     * the current gear will be one of GEAR_1, GEAR_2 etc, which reflects
     * the actual gear the transmission is currently running in.
     * Requires permission: {@link Car#PERMISSION_POWERTRAIN}.
     */
    @RequiresPermission(Car.PERMISSION_POWERTRAIN)
    public static final int CURRENT_GEAR = 289408001;

[nikagersonlohman]

Test it in the emulator. It's not ;)

[nikagersonlohman]

[nikagersonlohman]

And here's the code for the view (derived from your demo code :-) ):

    private var carPropertyCurrentGearListener = object : CarPropertyManager.CarPropertyEventCallback {
        override fun onChangeEvent(value: CarPropertyValue<Any>) {
            Log.d(TAG, "Received on changed car property event")
            // value.value type changes depending on the vehicle property.
            currentGearTextView.text = value.value.toString()
        }

        override fun onErrorEvent(propId: Int, zone: Int) {
            Log.w(TAG, "Received error car property event, propId=$propId, zone=$zone")
        }
    }

    private var carPropertyIgnitionStateListener = object : CarPropertyManager.CarPropertyEventCallback {
        override fun onChangeEvent(value: CarPropertyValue<Any>) {
            Log.d(TAG, "Received on changed car property event")
            // value.value type changes depending on the vehicle property.
            ignitionStateTextView.text = VEHICLE_IGNITION_STATES.getOrDefault(value.value as Int, "IGNITION_STATE_INVALID")
        }

        override fun onErrorEvent(propId: Int, zone: Int) {
            Log.w(TAG, "Received error car property event, propId=$propId, zone=$zone")
        }

[Zhomart]

you're right, it doesn't show GEAR_SELECTION. It shows CURRENT_GEAR, which can be changed in Vhal properties tab (next to the Car Sensor Data tab).

Search for gear and change the value of current gear, it will update the Gear Viewer app UI.

(looks like emulator should be updated, as CURRENT_GEAR should show the actual gear value)

[nikagersonlohman]

The emulator doesn't allow me driving anyway, as soon as I start "driving" the screen shows a message I am not allowed to use my app while driving :)

[Zhomart]

#11 this CL should fix your issue. Please read https://source.android.com/devices/automotive/driver_distraction/guidelines to learn more about UX Restrictions