访问 Android 设备和设备元数据

import com.google.home.Home
import com.google.home.HomeDevice
import com.google.home.Id

import com.google.home.matter.standard.OnOff
import com.google.home.matter.standard.OnOffPluginUnitDevice

// Get a flow of all devices accessible to the user
val allDevicesFlow: HomeObjectsFlow<HomeDevice> = home.devices()

// Calling list() on a HomeObjectsFlow returns the first Set of elements.
val allDevices: Set<HomeDevice> = allDevicesFlow.list()

// Assuming we have a device.
val deviceFlow = home.devices().itemFlow(myDeviceId)

val device = deviceFlow.first()

// Get a flow of a standard trait on the type. distinctUntilChanged() is needed to only trigger
// on the specific trait changes and not the whole type.
val onOffTraitFlow: Flow<OnOff?> =
  device.type(DimmableLightDevice).map { it.standardTraits.onOff }.distinctUntilChanged()

val onOffTrait: OnOff = onOffTraitFlow.first()!!

val onOffTrait = device.?type(DimmableLightDevice)?.map{it.trait(OnOff)}.first()
onOffTrait.forceRead()

// Get all types available on this device. Requires the types to be part of the registry during
// SDK initialization.
val typesFlow: Flow<Set<DeviceType>> = device.types()

// Get a snapshot of all types.
val types: Set<DeviceType> = typesFlow.first()

// Get the DimmableLightDevice instance from the set of types.
val dimmableLightDevice = types.filterIsInstance<DimmableLightDevice>().firstOrNull()

// Get all traits in the type + traits registered
val allTraits: Set<Trait> = dimmableLightDevice!!.traits()

// Accessing standard traits on the type.
val onOffTrait: OnOff? = dimmableLightDevice.standardTraits.onOff
val levelControlTrait: LevelControl? = dimmableLightDevice.standardTraits.levelControl

// Accessing a custom trait on the type.
val customTrait = dimmableLightDevice.trait(MyCustomTrait)

// Get all devices that support OnOff
val onOffDevices: Flow<List<HomeDevice>> =
  home.devices().map { devices -> devices.filter { it.has(OnOff) } }

// Get a list of devices with similar device types (lights)
val lightDevices =
  home.devices().map { devices ->
    devices.filter {
      it.has(DimmableLightDevice) ||
        it.has(OnOffLightDevice) ||
        it.has(ColorTemperatureLightDevice) ||
        it.has(ExtendedColorLightDevice)
    }
  }

// Get device basic information. All general information traits are on the RootNodeDevice type.
val basicInformation = device.type(RootNodeDevice).first().standardTraits.basicInformation!!
println("vendorName ${basicInformation.vendorName}")
println("vendorId ${basicInformation.vendorId}")
println("productId ${basicInformation.productId}")

{
  "requestId": "ff36a3cc-ec34-11e6-b1a0-64510650abcf",
  "payload": {
    "agentUserId": "1836.15267389",
    "devices": [
      {
        "id": "456",
        "type": "action.devices.types.LIGHT",
        "traits": [
          "action.devices.traits.OnOff",
          "action.devices.traits.Brightness",
          "action.devices.traits.ColorSetting",
        ],
        "willReportState": true,
        "deviceInfo": { ... },
        "matterOriginalVendorId": "0xfff1",
        "matterOriginalProductId": "0x1234",
        "matterUniqueId": "matter-device-id",
        "otherDeviceIds": [
          {
            "deviceId": "local-device-id",
          }
        ]
      }
    ]
  }
}

val types = device.types().first()
val primaryTypes = types.filter { it.metadata.isPrimaryType }

val onOffConnectivity = onOffTrait?.metadata?.sourceConnectivity?.connectivityState

val lightConnectivity = dimmableLightDevice.metadata.sourceConnectivity.connectivityState

val onOffLocality = onOffTrait?.metadata?.sourceConnectivity?.dataSourceLocality

val lightLocality = dimmableLightDevice.metadata.sourceConnectivity.dataSourceLocality

mixerDevice.setName("Grendel")