Windows Phone 十八、加速計

標籤：

加速度感應器

手機的加速度感應器工作時是通過 x、y、z 三個軸的位移來計算的

在代碼基本的 API 主要集中在 Accelerometer 類型中

主要是使用該類型的對象捕獲 ReadingChanged 事件監視加速度值變化的

X、Y、Z 加速度感測值

1     <StackPanel>2         <TextBox x:Name="txtX" Header="X:"/>3         <TextBox x:Name="txtY" Header="Y:"/>4         <TextBox x:Name="txtZ" Header="Z:"/>5     </StackPanel>

 1         protected override void OnNavigatedTo(NavigationEventArgs e) 2         { 3             // 先拿到感應器對象 4             Accelerometer a = Accelerometer.GetDefault(); 5             if (a == null) 6             { 7                 // 代表沒有加速計感應器對象 8                 System.Diagnostics.Debug.WriteLine("沒有加速計感應器"); 9                 return;10             }11             a.ReadingChanged += a_ReadingChanged;12             a.ReportInterval = a.MinimumReportInterval * 5;13         }14 15         async void a_ReadingChanged(Accelerometer sender, AccelerometerReadingChangedEventArgs args)16         {17             System.Diagnostics.Debug.WriteLine(args + "改變了。。。");18             // 拿到變化值19             await this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>20             {21                 txtX.Text = args.Reading.AccelerationX.ToString();22                 txtY.Text = args.Reading.AccelerationY.ToString();23                 txtZ.Text = args.Reading.AccelerationZ.ToString();24             });25         }

平衡檢測

1     <Grid>2 3         <Path Data="M180.348,341.493 L144.279,392.488 L162.935,391.244 L161.692,630.05 L200.249,630.05 L196.517,392.488 L216.418,393.731 z" Fill="#FF6AEA00" HorizontalAlignment="Center" Height="289.557" Stretch="Fill" Stroke="Black" UseLayoutRounding="False" VerticalAlignment="Bottom" Width="73.139" RenderTransformOrigin="0.5,1">4             <Path.RenderTransform>5                 <CompositeTransform x:Name="rotate" Rotation="0"/>6             </Path.RenderTransform>7         </Path>8 9     </Grid>

 1         protected override void OnNavigatedTo(NavigationEventArgs e) 2         { 3             DisplayInformation.AutoRotationPreferences = DisplayOrientations.Landscape; 4             // 先拿到感應器對象 5             Accelerometer a = Accelerometer.GetDefault(); 6             if (a == null) 7             { 8                 // 代表沒有加速計感應器對象 9                 System.Diagnostics.Debug.WriteLine("沒有加速計感應器");10                 return;11             }12             a.ReadingChanged += a_ReadingChanged;13             a.ReportInterval = a.MinimumReportInterval * 10;14         }15 16         async void a_ReadingChanged(Accelerometer sender, AccelerometerReadingChangedEventArgs args)17         {18             System.Diagnostics.Debug.WriteLine(args + "改變了。。。");19             // 拿到變化值20             await this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>21             {22                 rotate.Rotation = args.Reading.AccelerationY * 90;23             });24         }

 

Windows Phone 十八、加速計