Windows 8 学习笔记(六)—Accelerormeter和GeoLocation

WinRT中的设备类库中包含多种设备信息，如Sensor重力加速计，Location位置信息，Bluetooth蓝牙，Sms信息收发，下面看看各种使用方式：

Sensor重力加速器

Accelerormeter重力加速计对象，通过该对象可以获取重力加速X＼Ｙ＼Ｚ的值

首先定义该对象

Accelerormeter _accelerometer = Accelerometer.GetDefault();

接下来通过ReadingChanged事件去跟踪X＼Ｙ＼Ｚ值,Shaken晃动事件去作一些逻辑处理

注册ReadingChanged事件

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_accelerometer.ReadingChanged += _accelerometer_ReadingChanged; void _accelerometer_ReadingChanged(Accelerometer sender, AccelerometerReadingChangedEventArgs args)          {              Dispatcher.InvokeAsync(CoreDispatcherPriority.Normal, (s, a) =>              {                  AccelerometerReading reading = (a.Context as AccelerometerReadingChangedEventArgs).Reading;                  tbX.Text = String.Format( "{0,5:0.00}" , reading.AccelerationX);                  tbY.Text = String.Format( "{0,5:0.00}" , reading.AccelerationY);                  tbZ.Text = String.Format( "{0,5:0.00}" , reading.AccelerationZ);              }, this , e);          }

注册Shaken事件

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_accelerometer.Shaken += _accelerometer_Shaken; void _accelerometer_Shaken(Accelerometer sender, AccelerometerShakenEventArgs args)          {              Dispatcher.InvokeAsync(CoreDispatcherPriority.Normal, (s, a) =>              {                  _shakeCount++;                  tbShakeCount.Text = _shakeCount.ToString();              }, this , e);          }

 

其中需注意两个属性：

MinimumReportInterval 用于获取重力感应器报告数据的最小间隔时间

ReportInterval 设置或获取报告间隔值，该值的设置可以反应加速计的敏感性

 

GeoLocation位置信息

位置信息由Windows位置提供商通过WI-FI和IP 地址数据决定当前的地理信息，或者也可以通过GPS获取。通过GeoLocation可以得到准确的位置数据。

首先定义一个GeoLocation对象

Geolocator m_geo= new Geolocator();

接下来通过PositionChanged和 StatusChanged事件获取位置数据和当前位置设备器的状态

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m_geo.PositionChanged += m_geo_PositionChanged; Dispatcher.InvokeAsync(CoreDispatcherPriority.Normal, (s, a) =>              { //先得到当前位置对象                  Geoposition pos = (a.Context as IPositionChangedEventArgs).Position;                  textblock1.Text = "Latitude: " + pos.Coordinate.Latitude.ToString();                  textblock2.Text = "Longitude: " + pos.Coordinate.Longitude.ToString();                  textblock3.Text = "Accuracy: " + pos.Coordinate.Accuracy.ToString();              }, this , e);

 

监视当前位置定位器的状态

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m_geo.StatusChanged += m_geo_StatusChanged; void m_geo_StatusChanged(Geolocator sender, StatusChangedEventArgs args)          {              Dispatcher.InvokeAsync(CoreDispatcherPriority.Normal, (s, a) =>              {                  PositionStatus status = (a.Context as IStatusChangedEventArgs).Status;                  switch (status)                  {                      case PositionStatus.Ready:                          textblockStatus1.Text = "Ready" ;                          break ;                      case PositionStatus.Initializing:                          textblockStatus1.Text = "Initializing" ;                          break ;                      case PositionStatus.NoData:                          textblockStatus1.Text = "No data" ;                          break ;                      case PositionStatus.Disabled:                          textblockStatus1.Text = "Disabled" ;                          break ;                      case PositionStatus.NotInitialized:                          textblockStatus1.Text = "Not initialized" ;                          break ;                      case PositionStatus.NotAvailable:                          textblockStatus1.Text = "Not available" ;                          break ;                      default :                          textblockStatus1.Text = "Unexpected status" ;                          break ;                  }              }, this , e);          }

 

同样也有两个属性，这两个属性都是枚举类型：

PositionAccuracy：位置精准度，有0（默认）和1（高级别）两个值

PositionStatus：表明Geolocator提供位置数据的能力，上面例子也列出相应的枚举类型

 

 

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