Windows Phone 18, Compass

magnetometer Overview

Devices with magnetometer hardware support can determine the angle relative to the Arctic according to the magnetometer

The magnetometer access API is defined in the Compass class

Call mode is similar to the accelerometer

1     <GridBackground= "White">2         <ImageSource= "Compass.png"Rendertransformorigin= "0.5,0.5">3             <Image.rendertransform>4                 <Compositetransformx:name= "Rotate"Rotation= "1"/>5             </Image.rendertransform>6         </Image>7     </Grid>

1         protected Override voidonnavigatedto (NavigationEventArgs e)2         {3Compass C =Compass.getdefault ();4             if(c = =NULL)5             {6                 //Compass not supported7                 return;8             }9C.readingchanged + =Async(P1, p2) =Ten             { One                 //Modify the rotation angle of the picture; A System.Diagnostics.Debug.WriteLine (p2. Reading.HeadingTrueNorth.Value); -                 await  This. Dispatcher.runasync (Windows.UI.Core.CoreDispatcherPriority.Normal, () = -                 { theRotate. Rotation =-P2. Reading.HeadingTrueNorth.Value; -                 }); -             }; -C.reportinterval = C.minimumreportinterval *Ten; +}

Windows Phone 18, Compass