Xamarin.Forms で Micorosft Band の移動距離値を取得する

今回は Xamarin.Forms で移動距離値を取得してみます

ソースコードの一式は下記にあります！

細かい実装などはこちらを参照ください

<a href="https://github.com/matatabi-ux/XamarinBandSample">matatabi-ux/XamarinBandSample</a>github.com

※ 順次改修していく予定なので、この記事の内容が現時点のソースより古い可能性があります

ほとんど手順は変わらず、まずはデータのいれものを作ります

/// <summary>
/// iOS 用移動距離データ
/// </summary>
public class NativeBandDistanceReading : IBandDistanceReading
{
    /// <summary>
    /// コンストラクタ
    /// </summary>
    /// <param name="data">センサーデータ</param>
    public NativeBandDistanceReading(Native.Sensors.BandSensorDistanceData data)
    {
        this.Timestamp = DateTime.Now;

        this.CurrentMotion = MotionType.Unknown;
        if (data.PedometerMode == Native.Sensors.PedometerMode.Idle)
        {
            this.CurrentMotion = MotionType.Idle;
        }
        if (data.PedometerMode == Native.Sensors.PedometerMode.Walking)
        {
            this.CurrentMotion = MotionType.Walking;
        }
        if (data.PedometerMode == Native.Sensors.PedometerMode.Jogging)
        {
            this.CurrentMotion = MotionType.Jogging;
        }
        if (data.PedometerMode == Native.Sensors.PedometerMode.Running)
        {
            this.CurrentMotion = MotionType.Running;
        }
        this.Pace = (double)data.Pace;
        this.Speed = (double)data.Speed;
        this.TotalDistance = (long)data.TotalDistance;
    }

    /// <summary>
    /// 検出日時
    /// </summary>
    public DateTimeOffset Timestamp { get; private set; }

    /// <summary>
    /// 移動状態
    /// </summary>
    public MotionType CurrentMotion { get; private set; }

    /// <summary>
    /// 移動ペース
    /// </summary>
    public double Pace { get; private set; }

    /// <summary>
    /// 移動速度
    /// </summary>
    public double Speed { get; private set; }

    /// <summary>
    /// 移動距離合計
    /// </summary>
    public long TotalDistance { get; private set; }
}

プラットフォーム側の列挙型は switch だと分岐できない（Binding の仕方がまずいだけ？）ので、愚直に if 分岐させましたまぁ、iOS も Android もほぼ同じなのは変わらず

次にセンサー制御クラス

/// <summary>
/// iOS 用移動距離センサー
/// </summary>
public class NativeBandDistanceSensor : NativeBandSensorBase<IBandDistanceReading>
{
    /// <summary>
    /// 加速度センサー
    /// </summary>
    private Native.Sensors.DistanceSensor sensor = null;

    /// <summary>
    /// センサー値変更イベント
    /// </summary>        
    public override event EventHandler<BandSensorReadingEventArgs<IBandDistanceReading>> ReadingChanged;

    /// <summary>
    /// コンストラクタ
    /// </summary>
    /// <param name="manager">Band センサー管理クラス</param>
    public NativeBandDistanceSensor(Native.Sensors.IBandSensorManager manager)
        : base(manager)
    {
        this.sensor = Native.Sensors.BandSensorManagerExtensions.CreateDistanceSensor(manager);
        this.sensor.ReadingChanged += this.OnReadingChanged;
    }

    /// <summary>
    /// センサー値変更イベントハンドラ
    /// </summary>
    /// <param name="sender">イベント発行者</param>
    /// <param name="e">イベント引数</param>
    private void OnReadingChanged(object sender, Native.Sensors.BandSensorDataEventArgs<Native.Sensors.BandSensorDistanceData> e)
    {
        if (this.ReadingChanged == null)
        {
            return;
        }
        this.ReadingChanged.Invoke(
            this, new BandSensorReadingEventArgs<IBandDistanceReading>(new NativeBandDistanceReading(e.SensorReading)));
    }

    /// <summary>
    /// センサー検知を開始する
    /// </summary>
    /// <returns>Task</returns>
    public override Task StartReadingsAsync()
    {
        return Task.Run(() => this.sensor.StartReadings());
    }

    /// <summary>
    /// センサー検知を停止する
    /// </summary>
    /// <returns>Task</returns>
    public override Task StopReadingsAsync()
    {
        return Task.Run(() => this.sensor.StopReadings());
    }
}

こっちが iOS

/// <summary>
/// Android 用移動距離センサー
/// </summary>
public class NativeBandDistanceSensor : NativeBandSensorBase<IBandDistanceReading>
{
    /// <summary>
    /// 移動距離センサー
    /// </summary>
    private Native.Sensors.DistanceSensor sensor = null;

    /// <summary>
    /// センサー値変更イベント
    /// </summary>
    public override event EventHandler<BandSensorReadingEventArgs<IBandDistanceReading>> ReadingChanged;

        /// <summary>
    /// コンストラクタ
    /// </summary>
    /// <param name="manager">Band センサー管理クラス</param>
    public NativeBandDistanceSensor(Native.Sensors.IBandSensorManager manager)
        : base(manager)
    {
        this.sensor = Native.Sensors.BandSensorManagerExtensions.CreateDistanceSensor(manager);
        this.sensor.ReadingChanged += this.OnReadingChanged;
    }

    /// <summary>
    /// センサー値変更イベントハンドラ
    /// </summary>
    /// <param name="sender">イベント発行者</param>
    /// <param name="e">イベント引数</param>
    private void OnReadingChanged(object sender, Native.Sensors.IBandSensorEventEventArgs<Native.Sensors.IBandDistanceEvent> e)
    {
        if (this.ReadingChanged == null)
        {
            return;
        }
        this.ReadingChanged.Invoke(
            this, new BandSensorReadingEventArgs<IBandDistanceReading>(new NativeBandDistanceReading(e.SensorReading)));
    }

    /// <summary>
    /// センサー検知を開始する
    /// </summary>
    /// <returns>Task</returns>
    public override Task StartReadingsAsync()
    {
        return this.sensor.StartReadingsTaskAsync();
    }

    /// <summary>
    /// センサー検知を停止する
    /// </summary>
    /// <returns>Task</returns>
    public override Task StopReadingsAsync()
    {
        return this.sensor.StopReadingsTaskAsync();
    }
}

こっちが Android

かなり単純作業の連続になってきましたがこれらに合わせて ViewModel を改修

/// <summary>
/// センサー情報 ViewModel
/// </summary>
public class SensorReadingViewModel : BindableBase
{
    ～ 中略 ～

   #region DistanceSensor

    /// <summary>
    /// 移動状態
    /// </summary>
    private MotionType currentMotion = MotionType.Unknown;

    /// <summary>
    /// 移動状態
    /// </summary>
    public MotionType CurrentMotion
    {
        get { return this.currentMotion; }
        set { this.SetProperty<MotionType>(ref this.currentMotion, value); }
    }

    /// <summary>
    /// 移動ペース
    /// </summary>
    private double pace = 0d;

    /// <summary>
    /// 移動ペース
    /// </summary>
    public double Pace
    {
        get { return this.pace; }
        set { this.SetProperty<double>(ref this.pace, value); }
    }

    /// <summary>
    /// 移動速度
    /// </summary>
    private double speed = 0d;

    /// <summary>
    /// 移動速度
    /// </summary>
    public double Speed
    {
        get { return this.speed; }
        set { this.SetProperty<double>(ref this.speed, value); }
    }

    /// <summary>
    /// 移動距離合計
    /// </summary>
    private long totalDistance = 0L;

    /// <summary>
    /// 移動距離合計
    /// </summary>
    public long TotalDistance
    {
        get { return this.totalDistance; }
        set { this.SetProperty<long>(ref this.totalDistance, value); }
    }

    #endregion //DistanceSensor

    ～ 中略 ～

    /// <summary>
    /// センサー監視切替
    /// </summary>
    /// <param name="detecting">センサー監視フラグ</param>
    /// <returns>Task</returns>
    private async Task ChangeDetectSensors(bool detecting)
    {
       if (detecting)
        {
            // 加速度センサーの検知開始
            if (this.client.SensorManager.Accelerometer.IsSupported)
            {
                await this.client.SensorManager.Accelerometer.StartReadingsAsync();
                this.client.SensorManager.Accelerometer.ReadingChanged += this.OnAccelerometerReadingChanged;
            }
            // ジャイロセンサーの検知開始
            if (this.client.SensorManager.Gyroscope.IsSupported)
            {
                await this.client.SensorManager.Gyroscope.StartReadingsAsync();
                this.client.SensorManager.Gyroscope.ReadingChanged += this.OnGyroscopeReadingChanged;
            }
            // 心拍数の検知開始
            if (this.client.SensorManager.HeartRate.IsSupported)
            {
                await this.client.SensorManager.HeartRate.StartReadingsAsync();
                this.client.SensorManager.HeartRate.ReadingChanged += this.OnHeartRateReadingChanged;
            }
            // 歩数の検知開始
            if (this.client.SensorManager.Pedometer.IsSupported)
            {
                await this.client.SensorManager.Pedometer.StartReadingsAsync();
                this.client.SensorManager.Pedometer.ReadingChanged += this.OnPedometerReadingChanged;
            }
            // 移動距離の検知開始
            if (this.client.SensorManager.Distance.IsSupported)
            {
                await this.client.SensorManager.Distance.StartReadingsAsync();
                this.client.SensorManager.Distance.ReadingChanged += this.OnDistanceReadingChanged;
            }
        }
        else
        {
            // 加速度センサーの検知終了
            if (this.client.SensorManager.Accelerometer.IsSupported)
            {
                await this.client.SensorManager.Accelerometer.StopReadingsAsync();
                this.client.SensorManager.Accelerometer.ReadingChanged -= this.OnAccelerometerReadingChanged;
                this.AccelerationX = 0d;
                this.AccelerationY = 0d;
                this.AccelerationZ = 0d;
            }
            // ジャイロセンサーの検知終了
            if (this.client.SensorManager.Gyroscope.IsSupported)
            {
                await this.client.SensorManager.Gyroscope.StopReadingsAsync();
                this.client.SensorManager.Gyroscope.ReadingChanged -= this.OnGyroscopeReadingChanged;
                this.AngularVelocityX = 0d;
                this.AngularVelocityY = 0d;
                this.AngularVelocityZ = 0d;
                this.GyroAccelerationX = 0d;
                this.GyroAccelerationY = 0d;
                this.GyroAccelerationZ = 0d;
            }
            // 心拍数の検知終了
            if (this.client.SensorManager.HeartRate.IsSupported)
            {
                await this.client.SensorManager.HeartRate.StopReadingsAsync();
                this.client.SensorManager.HeartRate.ReadingChanged -= this.OnHeartRateReadingChanged;
                this.HeartRate = 0;
                this.HeartRateQuality = HeartRateQuality.Acquiring;
            }
            // 歩数の検知終了
            if (this.client.SensorManager.Pedometer.IsSupported)
            {
                await this.client.SensorManager.Pedometer.StopReadingsAsync();
                this.client.SensorManager.Pedometer.ReadingChanged -= this.OnPedometerReadingChanged;
                this.TotalSteps = 0L;
            }
            // 移動距離の検知終了
            if (this.client.SensorManager.Distance.IsSupported)
            {
                await this.client.SensorManager.Distance.StopReadingsAsync();
                this.client.SensorManager.Distance.ReadingChanged -= this.OnDistanceReadingChanged;
                this.CurrentMotion = MotionType.Unknown;
                this.Pace = 0d;
                this.Speed = 0d;
                this.TotalDistance = 0L;
            }
        }
    }

    ～ 中略 ～

    /// <summary>
    /// 移動距離変更イベントハンドラ
    /// </summary>
    /// <param name="sender">イベント発行者</param>
    /// <param name="e">イベント引数</param>
    private void OnDistanceReadingChanged(object sender, BandSensorReadingEventArgs<IBandDistanceReading> e)
    {
        if (e == null)
        {
            return;
        }
        this.CurrentMotion = e.SensorReading.CurrentMotion;
        this.Pace = e.SensorReading.Pace;
        this.Speed = e.SensorReading.Speed;
        this.TotalDistance = e.SensorReading.TotalDistance;
    }
}

最後に XAML

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:cv="clr-namespace:XamarinBandSample.Converters;assembly=XamarinBandSample"
             xmlns:t="clr-namespace:XamarinBandSample.Triggers;assembly=XamarinBandSample"
             xmlns:prismmvvm="clr-namespace:Prism.Mvvm;assembly=XamarinBandSample"
             prismmvvm:ViewModelLocator.AutoWireViewModel="true"
             x:Class="XamarinBandSample.Views.TopPage">

    ～ 中略 ～

    <!-- Sensor Info Pain-->
    <ScrollView IsVisible="{Binding ShowSensors}"
                Orientation="Vertical">
      <Grid Padding="10"
            RowSpacing="10"
            ColumnSpacing="10"
            BindingContext="{Binding SensorReading}">
        <Grid.RowDefinitions>
          <RowDefinition Height="Auto"/>
          <RowDefinition Height="Auto"/>
          <RowDefinition Height="Auto"/>
          <RowDefinition Height="Auto"/>
          <RowDefinition Height="Auto"/>
          <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
          <ColumnDefinition Width="100"/>
          <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>

    ～ 中略 ～

        <StackLayout Orientation="Horizontal"
                     Grid.Column="0"
                     Grid.ColumnSpan="2"
                     Grid.Row="5"
                     Spacing="5">

          <Label Text="Distance:"
                 FontSize="Medium"/>
          <StackLayout Orientation="Vertical"
                       Padding="10,0,0,0"
                       Spacing="10">
            <Label Text="{Binding CurrentMotion, StringFormat='motion={0}'}"
                   FontSize="Small"/>
            <Label Text="{Binding Pace, StringFormat='pace={0}'}"
                   FontSize="Small"/>
            <Label Text="{Binding Speed, StringFormat='speed={0}'}"
                   FontSize="Small"/>
            <Label Text="{Binding TotalDistance, StringFormat='distance={0}'}"
                   FontSize="Small"/>
          </StackLayout>

        </StackLayout>

      </Grid>
    </ScrollView>
  </Grid>

</ContentPage>