WP7备注(10)(Accelerometer+GeoCoordinateWatcher+Map Service)

Accelerometer基本设置:

Library:+Microsoft.Devices.Sensors

WMAppManifest.xml:+<Capability Name="ID_CAP_SENSORS" />

Accelerometer(Silverlight):

Accelerometer acc = new Accelerometer();
acc.ReadingChanged += OnAccelerometerReadingChanged;
acc.Start();

void OnAccelerometerReadingChanged(object sender, AccelerometerReadingEventArgs
args)
{}

Accelerometer(XNA):

Vector3 accelerometerVector;
object accelerometerVectorLock = new object();
Accelerometer accelerometer = new Accelerometer();
accelerometer.ReadingChanged += OnAccelerometerReadingChanged;

void OnAccelerometerReadingChanged(object sender, AccelerometerReadingEventArgs
args)
{
lock (accelerometerVectorLock)
{
accelerometerVector = new Vector3((float)args.X, (float)args.Y,
(float)args.Z);
}

GeoCoordinateWatcher基本设置:

Library:+System.Device.Location

WMAppManifest.xml:+<Capability Name="ID_CAP_LOCATION" />

GeoCoordinateWatcher:

GeoCoordinateWatcher geoWatcher = new GeoCoordinateWatcher();
geoWatcher.PositionChanged += OnGeoWatcherPositionChanged;
geoWatcher.Start();

void OnGeoWatcherPositionChanged(object sender,
GeoPositionChangedEventArgs<GeoCoordinate> args)
{
text = String.Format("Latitude: {0:F3}\r\n" +
"Longitude: {1:F3}\r\n" +
"Altitude: {2}\r\n\r\n" +
"{3}",
args.Position.Location.Latitude,
args.Position.Location.Longitude,
args.Position.Location.Altitude,
args.Position.Timestamp);
}

Map Service:

GeoCoordinateWatcher geoWatcher = new GeoCoordinateWatcher();
TerraServiceSoapClient proxy = new TerraServiceSoapClient();

proxy.GetAreaFromPtCompleted += OnProxyGetAreaFromPtCompleted;
proxy.GetTileCompleted += OnProxyGetTileCompleted;
statusText.Text = "Obtaining geographic location...";
geoWatcher.PositionChanged += OnGeoWatcherPositionChanged;
geoWatcher.Start();

void OnGeoWatcherPositionChanged(object sender,
GeoPositionChangedEventArgs<GeoCoordinate> args)
{
// Turn off GeoWatcher
geoWatcher.PositionChanged -= OnGeoWatcherPositionChanged;
geoWatcher.Stop();
// Set coordinates to title text
GeoCoordinate coord = args.Position.Location;
ApplicationTitle.Text += ": " + String.Format("{0:F2}°{1} {2:F2}°{3}",
Math.Abs(coord.Latitude),
coord.Latitude > 0 ? 'N' : 'S',
Math.Abs(coord.Longitude),
coord.Longitude > 0 ? 'E' : 'W');
// Query proxy for AreaBoundingBox
LonLatPt center = new LonLatPt();
center.Lon = args.Position.Location.Longitude;
center.Lat = args.Position.Location.Latitude;
statusText.Text = "Accessing Microsoft Research Maps Service...";
proxy.GetAreaFromPtAsync(center, 1, Scale.Scale16m,
(int)ContentPanel.ActualWidth,
(int)ContentPanel.ActualHeight);
}

void OnProxyGetAreaFromPtCompleted(object sender, GetAreaFromPtCompletedEventArgs
args)
{
if (args.Error != null)
{
statusText.Text = args.Error.Message;
return;
}
statusText.Text = "Getting map tiles...";
AreaBoundingBox box = args.Result;
int xBeg = box.NorthWest.TileMeta.Id.X;
int yBeg = box.NorthWest.TileMeta.Id.Y;
int xEnd = box.NorthEast.TileMeta.Id.X;
int yEnd = box.SouthWest.TileMeta.Id.Y;
// Loop through the tiles
for (int x = xBeg; x <= xEnd; x++)
for (int y = yBeg; y >= yEnd; y--)
{
// Create Image object to display tile
Image img = new Image();
img.Stretch = Stretch.None;
img.HorizontalAlignment = HorizontalAlignment.Left;
img.VerticalAlignment = VerticalAlignment.Top;
img.Margin = new Thickness((x - xBeg) * 200 -
box.NorthWest.Offset.XOffset,
(yBeg - y) * 200 -
box.NorthWest.Offset.YOffset,
0, 0);
// Insert after TextBlock but before Image with logo
ContentPanel.Children.Insert(1, img);
// Define the tile ID
TileId tileId = box.NorthWest.TileMeta.Id;
tileId.X = x;
tileId.Y = y;
// Call proxy to get the tile (Notice that Image is user object)
proxy.GetTileAsync(tileId, img);
}
}

void OnProxyGetTileCompleted(object sender, GetTileCompletedEventArgs args)
{
if (args.Error != null)
{
return;
}
Image img = args.UserState as Image;
BitmapImage bmp = new BitmapImage();
bmp.SetSource(new MemoryStream(args.Result));
img.Source = bmp;
}