在 Android 上使用 Google Home API 建立自動化動作

透過集合功能整理內容 你可以依據偏好儲存及分類內容。

$ git clone -b codelab-branch-2 https://github.com/google-home/google-home-api-sample-app-android.git

automation {
name = "AutomationName"
  description = "An example automation description."
  isActive = true
    sequential {
    val onOffTrait = starter<_>(device1, OnOffLightDevice, OnOff)
    condition() { expression = onOffTrait.onOff equals true }
    action(device2, OnOffLightDevice) { command(OnOff.on()) }
  }
}

   // List of operations available when creating automation starters:
enum class Operation {
  EQUALS,
  NOT_EQUALS,
  GREATER_THAN,
  GREATER_THAN_OR_EQUALS,
  LESS_THAN,
  LESS_THAN_OR_EQUALS
    }

// List of operations available when comparing booleans:
 object BooleanOperations : Operations(listOf(
     Operation.EQUALS,
     Operation.NOT_EQUALS
 ))
// List of operations available when comparing values:
object LevelOperations : Operations(listOf(
    Operation.GREATER_THAN,
    Operation.GREATER_THAN_OR_EQUALS,
    Operation.LESS_THAN,
    Operation.LESS_THAN_OR_EQUALS
))

enum class OnOffValue {
   On,
   Off,
}
enum class ThermostatValue {
  Heat,
  Cool,
  Off,
}

val valuesOnOff: Map<OnOffValue, Boolean> = mapOf(
  OnOffValue.On to true,
  OnOffValue.Off to false,
)
val valuesThermostat: Map<ThermostatValue, ThermostatTrait.SystemModeEnum> = mapOf(
  ThermostatValue.Heat to ThermostatTrait.SystemModeEnum.Heat,
  ThermostatValue.Cool to ThermostatTrait.SystemModeEnum.Cool,
  ThermostatValue.Off to ThermostatTrait.SystemModeEnum.Off,
)

val deviceVMs: List<DeviceViewModel> = structureVM.deviceVMs.collectAsState().value
...
DropdownMenu(expanded = expandedDeviceSelection, onDismissRequest = { expandedDeviceSelection = false }) {
// TODO: 4.1.1 - Starter device selection dropdown
// for (deviceVM in deviceVMs) {
//     DropdownMenuItem(
//         text = { Text(deviceVM.name) },
//         onClick = {
//             scope.launch {
//                 starterDeviceVM.value = deviceVM
//                 starterType.value = deviceVM.type.value
//                 starterTrait.value = null
//                 starterOperation.value = null
//             }
//             expandedDeviceSelection = false
//         }
//     )
// }
}

// Selected starter attributes for StarterView on screen:
val starterDeviceVM: MutableState<DeviceViewModel?> = remember {
mutableStateOf(starterVM.deviceVM.value) }
...
DropdownMenu(expanded = expandedTraitSelection, onDismissRequest = { expandedTraitSelection = false }) {
// TODO: 4.1.2 - Starter device traits selection dropdown
// val deviceTraits = starterDeviceVM.value?.traits?.collectAsState()?.value!!
// for (trait in deviceTraits) {
//     DropdownMenuItem(
//         text = { Text(trait.factory.toString()) },
//         onClick = {
//             scope.launch {
//                 starterTrait.value = trait.factory
//                 starterOperation.value = null
//             }
//             expandedTraitSelection = false
//         }
//     )
}
}

val starterOperation: MutableState<StarterViewModel.Operation?> = remember {
  mutableStateOf(starterVM.operation.value) }
  ...
  DropdownMenu(expanded = expandedOperationSelection, onDismissRequest = { expandedOperationSelection = false }) {
    // ...
    if (!StarterViewModel.starterOperations.containsKey(starterTrait.value))
    return@DropdownMenu
    // TODO: 4.1.3 - Starter device trait operations selection dropdown
      // val operations: List<StarterViewModel.Operation> = StarterViewModel.starterOperations.get(starterTrait.value ?: OnOff)?.operations!!
    //  for (operation in operations) {
    //      DropdownMenuItem(
    //          text = { Text(operation.toString()) },
    //          onClick = {
    //              scope.launch {
    //                  starterOperation.value = operation
    //              }
    //              expandedOperationSelection = false
    //          }
    //      )
    //  }
}

when (starterTrait.value) {
  OnOff -> {
        ...
    DropdownMenu(expanded = expandedBooleanSelection, onDismissRequest = { expandedBooleanSelection = false }) {
// TODO: 4.1.4 - Starter device trait values selection dropdown
//             for (value in StarterViewModel.valuesOnOff.keys) {
//                 DropdownMenuItem(
//                     text = { Text(value.toString()) },
//                     onClick = {
//                         scope.launch {
//                             starterValueOnOff.value = StarterViewModel.valuesOnOff.get(value)
//                         }
//                         expandedBooleanSelection = false
//                     }
//                 )
//             }
             }
              ...
          }
           LevelControl -> {
              ...
      }
   }

val draftVM: DraftViewModel = homeAppVM.selectedDraftVM.collectAsState().value!!
// Save starter button:
Button(
enabled = isOptionsSelected && isValueProvided,
onClick = {
  scope.launch {
  // TODO: 4.1.5 - store all starter ViewModel variables into draft ViewModel
  // starterVM.deviceVM.emit(starterDeviceVM.value)
  // starterVM.trait.emit(starterTrait.value)
  // starterVM.operation.emit(starterOperation.value)
  // starterVM.valueOnOff.emit(starterValueOnOff.value!!)
  // starterVM.valueLevel.emit(starterValueLevel.value!!)
  // starterVM.valueBooleanState.emit(starterValueBooleanState.value!!)
  // starterVM.valueOccupancy.emit(starterValueOccupancy.value!!)
  // starterVM.valueThermostat.emit(starterValueThermostat.value!!)
  //
  // draftVM.starterVMs.value.add(starterVM)
  // draftVM.selectedStarterVM.emit(null)
  }
})
{ Text(stringResource(R.string.starter_button_create)) }

   // List of operations available when creating automation starters:
enum class Action {
  ON,
  OFF,
  MOVE_TO_LEVEL,
  MODE_HEAT,
  MODE_COOL,
  MODE_OFF,
}

 // List of operations available when comparing booleans:
object OnOffActions : Actions(listOf(
    Action.ON,
    Action.OFF,
))
// List of operations available when comparing booleans:
object LevelActions : Actions(listOf(
    Action.MOVE_TO_LEVEL
))
// List of operations available when comparing booleans:
object ThermostatActions : Actions(listOf(
    Action.MODE_HEAT,
    Action.MODE_COOL,
    Action.MODE_OFF,
))
// Map traits and the comparison operations they support:
val actionActions: Map<TraitFactory<out Trait>, Actions> = mapOf(
    OnOff to OnOffActions,
    LevelControl to LevelActions,
 // BooleanState - No Actions
 // OccupancySensing - No Actions
    Thermostat to ThermostatActions,
)

   val valueLevel: MutableStateFlow<UByte?>

val deviceVMs = structureVM.deviceVMs.collectAsState().value
...
DropdownMenu(expanded = expandedDeviceSelection, onDismissRequest = { expandedDeviceSelection = false }) {
// TODO: 4.2.1 - Action device selection dropdown
// for (deviceVM in deviceVMs) {
//     DropdownMenuItem(
//         text = { Text(deviceVM.name) },
//         onClick = {
//             scope.launch {
//                 actionDeviceVM.value = deviceVM
//                 actionTrait.value = null
//                 actionAction.value = null
//             }
//             expandedDeviceSelection = false
//         }
//     )
// }
}

val actionDeviceVM: MutableState<DeviceViewModel?> = remember {
mutableStateOf(actionVM.deviceVM.value) }
...
DropdownMenu(expanded = expandedTraitSelection, onDismissRequest = { expandedTraitSelection = false }) {
// TODO: 4.2.2 - Action device traits selection dropdown
// val deviceTraits: List<Trait> = actionDeviceVM.value?.traits?.collectAsState()?.value!!
// for (trait in deviceTraits) {
//     DropdownMenuItem(
//         text = { Text(trait.factory.toString()) },
//         onClick = {
//             scope.launch {
//                 actionTrait.value = trait
//                 actionAction.value = null
//             }
//             expandedTraitSelection = false
//         }
//     )
// }
}

DropdownMenu(expanded = expandedActionSelection, onDismissRequest = { expandedActionSelection = false }) {
// ...
if (!ActionViewModel.actionActions.containsKey(actionTrait.value?.factory))
return@DropdownMenu
// TODO: 4.2.3 - Action device trait actions (commands) selection dropdown
// val actions: List<ActionViewModel.Action> = ActionViewModel.actionActions.get(actionTrait.value?.factory)?.actions!!
// for (action in actions) {
//     DropdownMenuItem(
//         text = { Text(action.toString()) },
//         onClick = {
//             scope.launch {
//                 actionAction.value = action
//             }
//             expandedActionSelection = false
//         }
//     )
// }
}

when (actionTrait.value?.factory) {
LevelControl -> {
// TODO: 4.2.4 - Action device trait action(command) values selection widget
// Column (Modifier.padding(horizontal = 16.dp, vertical = 8.dp).fillMaxWidth()) {
//   Text(stringResource(R.string.action_title_value), fontSize = 16.sp, fontWeight = FontWeight.SemiBold)
//  }
//
//  Box (Modifier.padding(horizontal = 24.dp, vertical = 8.dp)) {
//      LevelSlider(value = actionValueLevel.value?.toFloat()!!, low = 0f, high = 254f, steps = 0,
//          modifier = Modifier.padding(top = 16.dp),
//          onValueChange = { value : Float -> actionValueLevel.value = value.toUInt().toUByte() }
//          isEnabled = true
//      )
//  }
...
}

val draftVM: DraftViewModel = homeAppVM.selectedDraftVM.collectAsState().value!!
// Save action button:
Button(
  enabled = isOptionsSelected,
  onClick = {
  scope.launch {
  // TODO: 4.2.5 - store all action ViewModel variables into draft ViewModel
  // actionVM.deviceVM.emit(actionDeviceVM.value)
  // actionVM.trait.emit(actionTrait.value)
  // actionVM.action.emit(actionAction.value)
  // actionVM.valueLevel.emit(actionValueLevel.value)
  //
  // draftVM.actionVMs.value.add(actionVM)
  // draftVM.selectedActionVM.emit(null)
  }
})
{ Text(stringResource(R.string.action_button_create)) }

fun HomeAppView (homeAppVM: HomeAppViewModel) {
  ...
  // If a draft automation is selected, show the draft editor:
  if (selectedDraftVM != null) {
    DraftView(homeAppVM)
  }
  ...
}

fun DraftView (homeAppVM: HomeAppViewModel) {
   val draftVM: DraftViewModel = homeAppVM.selectedDraftVM.collectAsState().value!!
    ...
// Draft Starters:
   DraftStarterList(draftVM)
// Draft Actions:
   DraftActionList(draftVM)
}

val starterVMs: List<StarterViewModel> = starterVMs.value
val actionVMs: List<ActionViewModel> = actionVMs.value
    ...
fun getDraftAutomation() : DraftAutomation {
    ...
  val starterVMs: List<StarterViewModel> = starterVMs.value
    ...
  return automation {
    this.name = name
    this.description = description
    this.isActive = true
    // The sequential block wrapping all nodes:
    sequential {
    // The select block wrapping all starters:
      select {
    // Iterate through the selected starters:
        for (starterVM in starterVMs) {
        // The sequential block for each starter (should wrap the Starter Expression!)
          sequential {
              ...
              val starterTrait: TraitFactory<out Trait> = starterVM.trait.value!!
              ...
              when (starterTrait) {
                  OnOff -> {
        // TODO: 4.4.1 - Set starter expressions according to trait type
        //   val onOffValue: Boolean = starterVM.valueOnOff.value
        //   val onOffExpression: TypedExpression<out OnOff> =
        //       starterExpression as TypedExpression<out OnOff>
        //   when (starterOperation) {
        //       StarterViewModel.Operation.EQUALS ->
        //           condition { expression = onOffExpression.onOff equals onOffValue }
        //       StarterViewModel.Operation.NOT_EQUALS ->
        //           condition { expression = onOffExpression.onOff notEquals onOffValue }
        //       else -> { MainActivity.showError(this, "Unexpected operation for OnOf
        //   }
        }
   LevelControl -> {
     ...
// Function to allow manual execution of the automation:
manualStarter()
     ...
}

val starterVMs: List<StarterViewModel> = starterVMs.value
val actionVMs: List<ActionViewModel> = actionVMs.value
    ...
fun getDraftAutomation() : DraftAutomation {
      ...
  return automation {
    this.name = name
    this.description = description
    this.isActive = true
    // The sequential block wrapping all nodes:
    sequential {
          ...
    // Parallel block wrapping all actions:
      parallel {
        // Iterate through the selected actions:
        for (actionVM in actionVMs) {
          val actionDeviceVM: DeviceViewModel = actionVM.deviceVM.value!!
        // Action Expression that the DSL will check for:
          action(actionDeviceVM.device, actionDeviceVM.type.value.factory) {
            val actionCommand: Command = when (actionVM.action.value) {
                  ActionViewModel.Action.ON -> { OnOff.on() }
                  ActionViewModel.Action.OFF -> { OnOff.off() }
    // TODO: 4.4.2 - Set starter expressions according to trait type
    // ActionViewModel.Action.MOVE_TO_LEVEL -> {
    //     LevelControl.moveToLevelWithOnOff(
    //         actionVM.valueLevel.value!!,
    //         0u,
    //         LevelControlTrait.OptionsBitmap(),
    //         LevelControlTrait.OptionsBitmap()
    //     )
    // }
      ActionViewModel.Action.MODE_HEAT -> { SimplifiedThermostat
      .setSystemMode(SimplifiedThermostatTrait.SystemModeEnum.Heat) }
          ...
}

fun createAutomation(isPending: MutableState<Boolean>) {
  viewModelScope.launch {
    val structure : Structure = selectedStructureVM.value?.structure!!
    val draft : DraftAutomation = selectedDraftVM.value?.getDraftAutomation()!!
    isPending.value = true
    // TODO: 4.4.3 - Call the Home API to create automation and handle exceptions
    // // Call Automation API to create an automation from a draft:
    // try {
    //     structure.createAutomation(draft)
    // }
    // catch (e: Exception) {
    //     MainActivity.showError(this, e.toString())
    //     isPending.value = false
    //     return@launch
    // }
    // Scrap the draft and automation candidates used in the process:
    selectedCandidateVMs.emit(null)
    selectedDraftVM.emit(null)
    isPending.value = false
  }
}

   fun showCandidates() {

   ...
// TODO: 5.1.1 - Retrieve automation candidates, filtering to include CommandCandidate types only
// // Retrieve a set of initial automation candidates from the device:
// val candidates: Set<NodeCandidate> = deviceVM.device.candidates().first()
//
// for (candidate in candidates) {
//     // Check whether the candidate trait is supported:
//     if(candidate.trait !in HomeApp.supportedTraits)
//         continue
//     // Check whether the candidate type is supported:
//     when (candidate) {
//         // Command candidate type:
//         is CommandCandidate -> {
//             // Check whether the command candidate has a supported command:
//             if (candidate.commandDescriptor !in ActionViewModel.commandMap)
//                 continue
//         }
//         // Other candidate types are currently unsupported:
//         else -> { continue }
//     }
//
//     candidateVMList.add(CandidateViewModel(candidate, deviceVM))
// }
...
           // Store the ViewModels:
selectedCandidateVMs.emit(candidateVMList)
}

    // Map of supported commands from Discovery API:
val commandMap: Map<CommandDescriptor, Action> = mapOf(
    // TODO: 5.1.2 - Set current supported commands
    // OnOffTrait.OnCommand to Action.ON,
    // OnOffTrait.OffCommand to Action.OFF,
    // LevelControlTrait.MoveToLevelWithOnOffCommand to Action.MOVE_TO_LEVEL
)

fun CandidateListItem (candidateVM: CandidateViewModel, homeAppVM: HomeAppViewModel) {
    val scope: CoroutineScope = rememberCoroutineScope()
    Box (Modifier.padding(horizontal = 24.dp, vertical = 8.dp)) {
        Column (Modifier.fillMaxWidth().clickable {
        // TODO: 5.2.1 - Set the selectedDraftVM to the selected candidate
        // scope.launch { homeAppVM.selectedDraftVM.emit(DraftViewModel(candidateVM)) }
        }) {
            ...
        }
    }
}

fun HomeAppView (homeAppVM: HomeAppViewModel) {
   ...
  val selectedDraftVM: DraftViewModel? by homeAppVM.selectedDraftVM.collectAsState()
...
  // If a draft automation is selected, show the draft editor:
  if (selectedDraftVM != null) {
  DraftView(homeAppVM)
  }
   ...
}

automation {
  name = "AutomationName"
  description = "An example automation description."
  isActive = true
  description = "Do ... actions when time is up."
  sequential {
    // starter
    val starter = starter<_>(structure, Time.ScheduledTimeEvent) {
      parameter(
        Time.ScheduledTimeEvent.clockTime(
          LocalTime.of(hour, min, sec, 0)
        )
      )
    }
        // action
  ...
  }
}

automation {
  name = "AutomationName"
  description = "An example automation description."
  isActive = true
  description = "Broadcast in Speaker when ..."
  sequential {
    // starter
      ...
    // action
    action(structure) {
      command(
      AssistantBroadcast.broadcast("Time is up!!")
      )
    }
  }
}

sequential {
  val starterNode = starter<_>(device, OccupancySensorDevice, MotionDetection)
  // only proceed if there is currently motion taking place
  condition { starterNode.motionDetectionEventInProgress equals true }
   // ignore the starter for one minute after it was last triggered
    suppressFor(Duration.ofMinutes(1))
  
    // make announcements three seconds apart
    action(device, SpeakerDevice) {
      command(AssistantBroadcast.broadcast("Intruder detected!"))
    }
    delayFor(Duration.ofSeconds(3))
    action(device, SpeakerDevice) {
    command(AssistantBroadcast.broadcast("Intruder detected!"))
  }
    ...
}

automation {
  name = "Lock the doors when someone is home after 10pm"
  description = "1 starter, 2 actions"
  sequential {
    val unused =
      starter(structure, event = Time.ScheduledTimeEvent) {
        parameter(Time.ScheduledTimeEvent.clockTime(LocalTime.of(22, 0, 0, 0)))
      }
    val stateReaderNode = stateReader<_>(structure, AreaPresenceState)
    condition {
      expression =
        stateReaderNode.presenceState equals
          AreaPresenceStateTrait.PresenceState.PresenceStateOccupied
    }
    action(structure) { command(AssistantBroadcast.broadcast("Locks are being applied")) }
    for (lockDevice in lockDevices) {
      action(lockDevice, DoorLockDevice) {
        command(Command(DoorLock, DoorLockTrait.LockDoorCommand.requestId.toString(), mapOf()))
      }
    }
  }