// functions called when the back button is pressed
public override void OnBackPressed()
{
StopService(); // Stop the Location service if it running
MySettings.Save(mainsave);
base.OnBackPressed();
}
// Ok Button action for changing the Units
private void OkMeasurementAction(object sender, DialogClickEventArgs e)
{
if (ListPosition == 0)
{
// If switching from metric to Imperial then convert all the text on screen.
if (mainsave.Measurement == MySettings.MeasurementSystem.Metric)
{
MaxSpeedFloat = MaxSpeedFloat * .621371;
Speed = Speed * .621371;
MaxSpeed.Text = "Max Speed: " + MaxSpeedFloat.ToString("0.00") + " MPH";
speed.Text = "Speed: " + Speed.ToString("0.00") + " MPH";
elev = elev * 3.28; // Get the Ft Equivalent of Altitude's Meters
Altitude.Text = "Elevation: " + elev.ToString("0.0") + "Ft";
}
// Change unit system in the User settings
mainsave.Measurement = MySettings.MeasurementSystem.Imperial;
}
else
{
// If switching from imperial to metric then convert all the text on screen
if (mainsave.Measurement == MySettings.MeasurementSystem.Imperial)
{
MaxSpeedFloat = MaxSpeedFloat * 1.60934;
Speed = Speed * 1.60934;
MaxSpeed.Text = "Max Speed: " + MaxSpeedFloat.ToString("0.00") + " KPH";
speed.Text = "Speed: " + Speed.ToString("0.00") + " KPH";
elev = elev * .3048;
Altitude.Text = "Elevation: " + elev.ToString("0.0") + "m";
}
// Change unit system in user settings
mainsave.Measurement = MySettings.MeasurementSystem.Metric;
}
MySettings.Save(mainsave);
}
// Called when the user clicks on OK for the Color selector dialog
private void OkColorAction(object sender, DialogClickEventArgs e)
{
// Change color in user settings
mainsave.color = mainsave.List2DotColor(ListPosition);
// Save user settings
MySettings.Save(mainsave);
// Change the dot on the map to the new color
mapCtrl.Map.Layers[1].Style = new SymbolStyle {
Fill = { Color = mainsave.ReturnColor() }, SymbolScale = .4
};
}
// Checks if we have GPS permissions
private void FirstRun()
{
const string PREFS_NAME = "PrefsFile";
const string PrefVersionCodeKey = "version_code";
int DoesntExist = -1;
// Get Current Version of Application
int currentVersionCode = Application.Context.PackageManager.GetPackageInfo(Application.Context.ApplicationContext.PackageName, 0).VersionCode;
ISharedPreferences prefs = GetSharedPreferences(PREFS_NAME, FileCreationMode.Private);
int savedVersionCode = prefs.GetInt(PrefVersionCodeKey, DoesntExist);
// If current version then its a normal run.
if (currentVersionCode == savedVersionCode)
{
mainsave = MySettings.Load();
}
else if (savedVersionCode == DoesntExist)
{
// New Install or User Cleared Shared Preferences
mainsave = new MySettings();
MySettings.Save(mainsave);
}
else if (currentVersionCode > savedVersionCode)
{
mainsave = MySettings.Load();
// Upgrade of Application
}
// Update shared preferences with current version code
prefs.Edit().PutInt(PrefVersionCodeKey, currentVersionCode).Apply();
if (CheckSelfPermission(Android.Manifest.Permission.AccessFineLocation) != (int)Permission.Granted)
{
System.Threading.Tasks.Task.Run(() =>
{
RequestPermissions(new string[] { Android.Manifest.Permission.AccessFineLocation }, 1);
}).ConfigureAwait(true);
speed.Text = "Location Service Needs to Be Allowed";
}
else
{
AllowMapToLoad = true;
}
}
// Will Stop location service when user switches to another app. OnResume will be called to restart location service if the navigate back
protected override void OnPause()
{
StopService();
MySettings.Save(mainsave);
base.OnPause();
}