HI i have implemented push notification in my application, serer is sending notification but not receiving at my end.
void OnPushNotificationReceived(PushNotificationChannel sender, PushNotificationReceivedEventArgs e)
{
string typeString = String.Empty;
string notificationContent = String.Empty;
switch (e.NotificationType)
{
case PushNotificationType.Badge:
typeString = "Badge";
notificationContent = e.BadgeNotification.Content.GetXml();
break;
case PushNotificationType.Tile:
notificationContent = e.TileNotification.Content.GetXml();
typeString = "Tile";
break;
case PushNotificationType.Toast:
notificationContent = e.ToastNotification.Content.GetXml();
typeString = "Toast";
// Setting the cancel property prevents the notification from being delivered. It's especially important to do this for toasts:
// if your application is already on the screen, there's no need to display a toast from push notifications.
e.Cancel = true;
break;
case PushNotificationType.Raw:
notificationContent = e.RawNotification.Content;
typeString = "Raw";
break;
}
// string text = "Received a " + typeString + " notification, containing: " + notificationContent;
var ignored = dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
// rootPage.NotifyUser(text, NotifyType.StatusMessage);
if (typeString == "Toast")
{
PushNotificationHelper.AddTostNotification(0, notificationContent);
}
else if (typeString == "Badge")
{
PushNotificationHelper.AddBadgeNotification(0, notificationContent);
}
});
}
public async void InitChannel()
{
Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
try
{
var channel = await PushNotificationChannelManager.CreatePushNotificationChannelForApplicationAsync();
if (channel != null)
{
//String existingChannel = (String)roamingSettings.Values["ExistingPushChannel"];
roamingSettings.Values["ExistingPushChannel"] = channel.Uri;
dispatcher = Windows.UI.Core.CoreWindow.GetForCurrentThread().Dispatcher;
channel.PushNotificationReceived += OnPushNotificationReceived;
}
else
{
roamingSettings.Values["ExistingPushChannel"] = "Failed to create channel";
}
}
catch
{
roamingSettings.Values["ExistingPushChannel"] = "Failed to create channel";
}
}
public async void InitNotificationsAsync()
{
try
{
Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
String existingChannel = (String)roamingSettings.Values["ExistingPushChannel"];
string tempDevelopmentKey = "";
string Platform = "";
List<string> arrayTags = new List<string>();
#if WINDOWS_APP
Platform = "windows-tablet";
tempDevelopmentKey = "dev_WindowsTabletNotification";
#endif
#if WINDOWS_PHONE_APP
Platform = "windows-phone";
tempDevelopmentKey ="dev_WindowsPhoneNotification";
#endif
arrayTags.Add(Platform) ;
arrayTags.Add(tempDevelopmentKey) ;
string TMBNotification = (string)roamingSettings.Values["TMBNotification"];
if(TMBNotification != null)
{
if(TMBNotification == "on")
{
arrayTags.Add("TMB");
}
}
string TRSNotification = (string)roamingSettings.Values["TRSNotification"];
if (TRSNotification != null)
{
if (TRSNotification == "on")
{
arrayTags.Add("TRS");
}
}
string IMNotification = (string)roamingSettings.Values["IMNotification"];
if (IMNotification != null)
{
if (IMNotification == "on")
{
arrayTags.Add("IM");
}
}
string SWSNotification = (string)roamingSettings.Values["SWSNotification"];
if (SWSNotification != null)
{
if (SWSNotification == "on")
{
arrayTags.Add("ANC");
}
}
string VIDNotification = (string)roamingSettings.Values["VIDNotification"];
if (VIDNotification != null)
{
if (VIDNotification == "on")
{
arrayTags.Add("videos");
}
}
var hub = new NotificationHub("hubname", "endpoint");
var result = await hub.RegisterNativeAsync(existingChannel, arrayTags);
// Displays the registration ID so you know it was successful
if (result.RegistrationId != null)
{
}
}catch
{
}
}
So how can i confirm that there is no issue in my implementation or there is issue from server end.
There are couple of steps you can take to debug this problem:-
There is broadcast and sending notification, using notification hub, option available on azure portal(you can do from VS also from left side server explorer). When you did this there is a log that will show you whether a notifications sent successfully or not.
First just delete all your registrations with notification hub and for very new registration check is your device getting registered with correct tags/channel uri or not(this you cad do from server explorer too)
Make sure you are sending/registering the correct templates that are corresponding to WNS service.
make sure you are using WNS service this different from what is for
WP8 silverlight one.
You can see the errors just at the bottom of this page if any.
There is option for device registrations from where you can alter the registrations.
Related
I have a Xamarin forms application. The application programmatically connects to a an access to point to communicate via sockets with a host machine connected to that same access point. The access point is not required to have internet access. When testing my code in iOS - I get a socket error stating that the 'Destination is unreachable'. However, if I go to settings and click on the wifi connection I want to use - I am taken to the login page for the access point. If I click cancel I get the option to 'Use without Internet'. If I select that option, then go back to my application, I am able to connect to the host. Is there a way to programmatically tell iOS to use the connecting even though it does not have internet? I looked at the Zone property but that is read only. Here is the code I am using. Any assistance would be appreciated.
public async Task<WifiConfiguredEventArgs> ConnectToWifi()
{
try
{
var tobj_WifiManager = new NEHotspotConfigurationManager();
var tobj_SSIDs = await tobj_WifiManager.GetConfiguredSsidsAsync();
if (tobj_SSIDs != null && tobj_SSIDs.Contains(App.gvm_AppSettings.WifiSSID))
{
// We are already connected -- just return
lobj_WifiConfiguredEventArgs.ConnectionStatus = FlexConnectionStatus.eAlreadyConnected;
}
else
{
var tobj_WifiConfig = new NEHotspotConfiguration(App.gvm_AppSettings.WifiSSID, App.gvm_AppSettings.WifiPassword, false);
tobj_WifiManager.ApplyConfiguration(tobj_WifiConfig, async (error) =>
{
if (error != null)
{
lobj_WifiConfiguredEventArgs.ConnectionStatus = FlexConnectionStatus.eErrorEstablishingConnection;
lobj_WifiConfiguredEventArgs.ErrorMessage = error.ToString();
}
else
{
lobj_WifiConfiguredEventArgs.ConnectionStatus = FlexConnectionStatus.eConnectionEstablished;
}
});
}
}
catch(Exception ex)
{
lobj_WifiConfiguredEventArgs.ConnectionStatus = FlexConnectionStatus.eErrorEstablishingConnection;
lobj_WifiConfiguredEventArgs.ErrorMessage = ex.Message;
lobj_WifiConfiguredEventArgs.ErrorException = ex;
App.ProcessException(ex);
}
return lobj_WifiConfiguredEventArgs;
}
}
Someone asked for the socket code so here it is. To be clear, the socket code connects and communicates fine in iOS when the access point has an internet connection. It also works fine in all the android calls.
using FCISelfCheckIn;
using FCISelfCheckIn.Resources;
using FCISharedAll.FCICommObjects;
using Newtonsoft.Json;
using System;
using System.Diagnostics;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using static FCISharedAll.FCIEnums.FlexEnums;
namespace FCISelfCheckIn
{
// This template use base socket syntax to change Pattern. (like Send, Receive, and so on)
// Convert to Task-based Asynchronous Pattern. (TAP)
public static class AsynchronousClientSocket
{
private static bool ib_IsConnected = false;
private static Socket iobj_Client = null;
public static async Task<MasterDataObject> SendMessage(string ps_IPAddress, int pi_Port, ge_CommunicationType pe_CommicationType,
string JSONData)
{
MasterDataObject lobj_response = new MasterDataObject();
try
{
//We should already be connected by the time we get here so just continue
//However if we are not - try to connect again
if (!ib_IsConnected)
{
// Establish the remote endpoint for the socket.
IPAddress ipAddress = IPAddress.Parse(ps_IPAddress);
IPEndPoint remoteEndPoint = new IPEndPoint(ipAddress, pi_Port);
// Create a TCP/IP socket.
iobj_Client = new Socket(ipAddress.AddressFamily,
SocketType.Stream, ProtocolType.Tcp);
// Connect to the remote endpoint.
ib_IsConnected = await iobj_Client.ConnectAsync(remoteEndPoint).ConfigureAwait(false);
}
if (ib_IsConnected)
{
var bytesSent = await iobj_Client.SendAsync(JSONData).ConfigureAwait(false);
// Receive the response from the remote device.
var ls_MasterDataObject = await iobj_Client.ReceiveAsync(60).ConfigureAwait(false);
if (ls_MasterDataObject == null)
{
lobj_response = new MasterDataObject();
lobj_response.CommunicationType = ge_CommunicationType.e_Error;
}
else
{
//deserialize the master data object in order to return it to the client
lobj_response = App.gvm_CommunicationHelper.DeserializeMasterDataObject(ls_MasterDataObject);
iobj_Client.Shutdown(SocketShutdown.Both);
}
}
else
{
lobj_response.CommunicationType = ge_CommunicationType.e_Error;
lobj_response.JSONDataObject = JsonConvert.SerializeObject(AppResources.ServerConnectionError);
}
// Release the socket.
iobj_Client.Close();
}
catch (Exception ex)
{
App.ProcessException(ex);
}
return lobj_response;
}
private static Task<bool> ConnectAsync(this Socket client, IPEndPoint remoteEndPoint)
{
if (client == null) throw new ArgumentNullException(nameof(client));
if (remoteEndPoint == null) throw new ArgumentNullException(nameof(remoteEndPoint));
return Task.Run(() => Connect(client, remoteEndPoint));
}
private static bool Connect(this Socket client, EndPoint remoteEndPoint)
{
bool lb_ReturnValue = true;
try
{
if (client == null || remoteEndPoint == null)
{
lb_ReturnValue = false;
}
else
{
client.Connect(remoteEndPoint);
}
}
catch (System.Net.Sockets.SocketException Socketex)
{
lb_ReturnValue = false;
if (Socketex.ErrorCode != 10061 && Socketex.ErrorCode != 10065)
{
//Dont log if the host is not running.
App.ProcessException(Socketex);
}
}
catch (Exception ex)
{
App.ProcessException(ex);
lb_ReturnValue = false;
}
return lb_ReturnValue;
}
private static async Task<string> ReceiveAsync(this Socket client, int waitForFirstDelaySeconds = 10)
{
if (client == null) throw new ArgumentNullException(nameof(client));
Debug.WriteLine("Receive Message 1");
// Timeout for wait to receive and prepare data.
for (var i = 0; i < waitForFirstDelaySeconds; i++)
{
if (client.Available > 0)
break;
await Task.Delay(3000).ConfigureAwait(false);
}
// return null If data is not available.
if (client.Available < 1)
return null;
Debug.WriteLine("Receive Message 2");
// Size of receive buffer.
const int bufferSize = 1024;
var buffer = new byte[bufferSize];
// Get data
var response = new StringBuilder(bufferSize);
do
{
var size = Math.Min(bufferSize, client.Available);
await Task.Run(() => client.Receive(buffer)).ConfigureAwait(false);
var ts_CurrentSegment = Encoding.ASCII.GetString(buffer, 0, size);
if (ts_CurrentSegment.Length > 0)
{
response.Append(Encoding.ASCII.GetString(buffer, 0, size));
}
} while (!response.ToString().EndsWith(FCIEndOfFile));
// Return result.
return response.ToString().Replace(FCIEndOfFile, "");
}
private static async Task<int> SendAsync(this Socket client, string data)
{
var byteData = Encoding.ASCII.GetBytes(data);
return await SendAsync(client, byteData, 0, byteData.Length, 0).ConfigureAwait(false);
}
private static Task<int> SendAsync(this Socket client, byte[] buffer, int offset,
int size, SocketFlags socketFlags)
{
if (client == null) throw new ArgumentNullException(nameof(client));
return Task.Run(() => client.Send(buffer, offset, size, socketFlags));
}
public async static Task<bool> ForcePermissions(string ps_IPAddress, int pi_Port)
{
bool lb_ReturnValue = false;
try
{
IPAddress ipAddress = IPAddress.Parse(ps_IPAddress);
//This is only done to force the local network permissions access in iOS 14.
IPEndPoint remoteEndPoint = new IPEndPoint(ipAddress, pi_Port);
// Create a TCP/IP socket.
iobj_Client = new Socket(ipAddress.AddressFamily,
SocketType.Stream, ProtocolType.Tcp);
ib_IsConnected = await iobj_Client.ConnectAsync(remoteEndPoint).ConfigureAwait(false);
if (ib_IsConnected)
{
Debug.WriteLine("GEORGE Permissions Connected");
//client.Shutdown(SocketShutdown.Both);
//client.Close();
lb_ReturnValue = true;
}
else
{
Debug.WriteLine("George Permissions not Connected");
}
}
catch (Exception ex)
{
//Just skip if there is an exception
App.ProcessException(ex);
}
return lb_ReturnValue;
}
}
}
maybe my code will mess here beacuse I'm new into firebase stuff and there is lack doc for newbie like me, so I want to make save and load data from firebase, there is 2 scene the first for main menu and second one the main game,so when firstime login or auto login, user will load current user data from realtime database (I'm using firebase) also applies to user when back to main menu.
in the second scene itself, user load current user highscore data at first start then when game over if the score > lasthighscore that will save/update latest highscore to realtime database.
here the preview this is when I auto-login then playgame until game over:
it's supposed to be updated but not when back to main menu, I already try with player prefs since i erase all data when sign out so the highscore always be 0 and if login with other account that highscore is not belong to other account.
here my firebase script on main menu:
private void Start()
{
Time.timeScale = 1;
mainPanel.SetActive(true);
InitializeFirebase();
}
void InitializeFirebase()
{
auth = FirebaseAuth.DefaultInstance;
DBreference = FirebaseDatabase.DefaultInstance.RootReference;
auth.StateChanged += AuthStateChanged;
AuthStateChanged(this, null);
}
void AuthStateChanged(object sender, System.EventArgs eventArgs)
{
//This checks if the user (your local user) is the same as the one from the auth
if (auth.CurrentUser != User)
{
//this seems the same, but user could have been null before
bool signedIn = User != auth.CurrentUser && auth.CurrentUser != null;
if (!signedIn && User != null)
{
Debug.Log("Signed out " + User.UserId);
loginPanel.SetActive(true);
}
//this is important step, this user is the one you should be working with
User = auth.CurrentUser;
if (signedIn)
{
Debug.Log("Signed in " + User.UserId);
userNameShowText.text = User.DisplayName;
StartCoroutine(LoadUserData());
loginPanel.SetActive(false);
// //highScoreMainMenu.text = PlayerPrefs.GetInt("highscore").ToString("0000000");
}
else
{
loginPanel.SetActive(true);
}
}
}
public IEnumerator Login(string _email, string _password)
{
//Call the Firebase auth signin function passing the email and password
var LoginTask = auth.SignInWithEmailAndPasswordAsync(_email, _password);
//Wait until the task completes
yield return new WaitUntil(predicate: () => LoginTask.IsCompleted);
if (LoginTask.Exception != null)
{
//If there are errors handle them
Debug.LogWarning(message: $"Failed to register task with {LoginTask.Exception}");
FirebaseException firebaseEx = LoginTask.Exception.GetBaseException() as FirebaseException;
AuthError errorCode = (AuthError)firebaseEx.ErrorCode;
string message = "Login Failed!";
switch (errorCode)
{
case AuthError.MissingEmail:
message = "Missing Email";
break;
case AuthError.MissingPassword:
message = "Missing Password";
break;
case AuthError.WrongPassword:
message = "Wrong Password";
break;
case AuthError.InvalidEmail:
message = "Invalid Email";
break;
case AuthError.UserNotFound:
message = "Account does not exist";
break;
}
warningLoginText.text = message;
}
else
{
//User is now logged in
//Now get the result
User = LoginTask.Result;
Debug.LogFormat("User signed in successfully: {0} ({1})", User.DisplayName, User.Email);
warningLoginText.text = "";
confirmLoginText.text = "Logged In";
StartCoroutine(LoadUserData());
yield return new WaitForSeconds(2);
userNameShowText.text = User.DisplayName;
UserDataScreen(); // Change to user data UI
confirmLoginText.text = "";
ClearLoginFeilds();
ClearRegisterFeilds();
}
}
public IEnumerator UpdateHighScore(int _highScore)
{
var DBTask = DBreference.Child("users").Child(auth.CurrentUser.UserId).Child("highscore").SetValueAsync(_highScore);
yield return new WaitUntil(predicate: () => DBTask.IsCompleted);
if (DBTask.Exception != null)
{
Debug.LogWarning(message: $"Failed to register task with {DBTask.Exception}");
}
else
{
//giscrore now updated
}
}
and this is for the game scene also same function for update higscore like on main menu.
void Start()
{
InitializeFirebase();
YetGameOver();
//GetScore
score = 0;
scoreText.text = score.ToString("00000");
//highScoreText.text = "HI :" + PlayerPrefs.GetInt("highscore", 0).ToString("00000");
maxTime = .1f;
}
void InitializeFirebase()
{
auth = FirebaseAuth.DefaultInstance;
DBreference = FirebaseDatabase.DefaultInstance.RootReference;
auth.StateChanged += AuthStateChanged;
AuthStateChanged(this, null);
}
void AuthStateChanged(object sender, System.EventArgs eventArgs)
{
//This checks if the user (your local user) is the same as the one from the auth
if (auth.CurrentUser != User)
{
//this seems the same, but user could have been null before
bool signedIn = User != auth.CurrentUser && auth.CurrentUser != null;
if (!signedIn && User != null)
{
Debug.Log("Signed out " + User.UserId);
}
//this is important step, this user is the one you should be working with
User = auth.CurrentUser;
if (signedIn)
{
Debug.Log("Signed in " + User.UserId);
StartCoroutine(LoadUserData());
//highScoreMainMenu.text = PlayerPrefs.GetInt("highscore").ToString("0000000");
}
}
}
public void GameOver()
{
SaveData();
StartCoroutine(WaitToDeath());
}
public void SaveData()
{
Debug.Log("Saved");
StartCoroutine(UpdateHighScore(PlayerPrefs.GetInt("highscore", 0)));
}
public IEnumerator WaitToDeath()
{
_CamShake.instance.shouldShake = true;
DeathSound();
gameOverPanel.SetActive(true);
endHighScoreText.text = "HI :" + PlayerPrefs.GetInt("highscore").ToString("0000000");
scoreText.gameObject.SetActive(false);
highScoreText.gameObject.SetActive(false);
yield return new WaitForSeconds(.1f);
//_AdmobAds.instance.ShowInterstitialAd();
isStarted = false;
isGameOver = true;
Time.timeScale = 0;
}
//same function like main menu
public IEnumerator UpdateHighScore(int _highScore)
{
var DBTask = DBreference.Child("users").Child(auth.CurrentUser.UserId).Child("highscore").SetValueAsync(_highScore);
yield return new WaitUntil(predicate: () => DBTask.IsCompleted);
if (DBTask.Exception != null)
{
Debug.LogWarning(message: $"Failed to register task with {DBTask.Exception}");
}
else
{
//highscore are now updated
}
}
public IEnumerator LoadUserData()
{
//Get the currently logged in user data
var DBTask = DBreference.Child("users").Child(User.UserId).GetValueAsync();
yield return new WaitUntil(predicate: () => DBTask.IsCompleted);
if (DBTask.Exception != null)
{
Debug.LogWarning(message: $"Failed to register task with {DBTask.Exception}");
}
else if (DBTask.Result.Value == null)
{
//No data exists yet
highScoreText.text = "0";
endHighScoreText.text = "0";
}
else
{
//Data has been retrieved
DataSnapshot snapshot = DBTask.Result;
highScoreText.text = endHighScoreText.text = snapshot.Child("highscore").Value.ToString();
}
}
You don't capture child in this method. You can only capture all the data from the root. So, simply remove the child. It will work.
my solution to firebase realtime database not working was that my google-services.json wasnt updated after adding the google-services.json from firebase auth. firebase, project overview cogwheel, project settings, json on that page somewhere.
and my problem with firebase auth before that was that i didnt set the Client ID in unity, window, google play games, setup, android setup.. get the id from google play console, play games services, setup & management, configuration, and figure out how to add game server credentials
I build project xamarin form print the text with device Nippon RPP-300 Mobile Printer. I using
using (BluetoothAdapter bluetoothAdapter = BluetoothAdapter.DefaultAdapter)
{
if (bluetoothAdapter == null)
{
throw new Exception("No default adapter");
}
if (!bluetoothAdapter.IsEnabled)
{
throw new Exception("Bluetooth not enabled");
//Intent enableIntent = new Intent(BluetoothAdapter.ActionRequestEnable);
//StartActivityForResult(enableIntent, REQUEST_ENABLE_BT);
// Otherwise, setup the chat session
}
BluetoothDevice device = (from bd in bluetoothAdapter.BondedDevices
where bd.Name == printerName
select bd).FirstOrDefault();
if (device == null)
throw new Exception(printerName + " device not found.");
using (BluetoothSocket _socket = device.CreateRfcommSocketToServiceRecord(UUID.FromString("00001101***")))
{
await _socket.ConnectAsync();
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(input);
await Task.Delay(3000);
// Write data to the device
await _socket.OutputStream.WriteAsync(buffer, 0, buffer.Length);
_socket.Close();
}
}
}
in the project.Droid. How to call using method in the project xamarin app?
You can use DependencyService .
in Forms
create an interface
public interface IBLEPrint
{
void BlePrint();
}
in Android project
Implement the interface
using xxx.Droid;
using xxx
using Xamarin.Forms;
using Xamarin.Forms.PlatformConfiguration.AndroidSpecific;
//using ...
[assembly: Dependency(typeof(BLEPrintService))]
namespace xxx.Droid
{
public class BLEPrintService : IBLEPrint
{
public void BlePrint()
{
//...
using (BluetoothAdapter bluetoothAdapter = BluetoothAdapter.DefaultAdapter)
{
if (bluetoothAdapter == null)
{
throw new Exception("No default adapter");
}
if (!bluetoothAdapter.IsEnabled)
{
throw new Exception("Bluetooth not enabled");
//Intent enableIntent = new Intent(BluetoothAdapter.ActionRequestEnable);
//StartActivityForResult(enableIntent, REQUEST_ENABLE_BT);
// Otherwise, setup the chat session
}
BluetoothDevice device = (from bd in bluetoothAdapter.BondedDevices
where bd.Name == printerName
select bd).FirstOrDefault();
if (device == null)
throw new Exception(printerName + " device not found.");
using (BluetoothSocket _socket = device.CreateRfcommSocketToServiceRecord(UUID.FromString("00001101***")))
{
await _socket.ConnectAsync();
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(input);
await Task.Delay(3000);
// Write data to the device
await _socket.OutputStream.WriteAsync(buffer, 0, buffer.Length);
_socket.Close();
}
}
}
}
}
}
I've created a Xamarin app that checks the users current location every couple minutes. My problem is it doesn't work when I minimize the app or the screen locks. Is there a way for me to continue the process while minimized or when the phone is locked?
This function checks to see if the user is at the destination location.
public bool atLocation(decimal currentLat, decimal currentLong, decimal destLat, decimal destLong)
{
decimal GPSLatitudePadding = 0.001M;
decimal GPSLongitudePadding = 0.001M;
var totalLowerLatitude = Convert.ToDecimal((destLat - GPSLatitudePadding).ToString("#.####"));
var totalLowerLongitude = Convert.ToDecimal((destLong + GPSLongitudePadding).ToString("#.####"));
var totalUpperLatitude = Convert.ToDecimal((destLat + GPSLatitudePadding).ToString("#.####"));
var totalUpperLongitude = Convert.ToDecimal((destLong - GPSLongitudePadding).ToString("#.####"));
if ((Convert.ToDecimal(destLat) >= totalLowerLatitude) &&
(Convert.ToDecimal(destLat) <= totalUpperLatitude) &&
(Convert.ToDecimal(destLong) <= totalLowerLongitude) &&
(Convert.ToDecimal(destLong) >= totalUpperLongitude))
{
return true;
}
return false;
}
If the user is at the destination for 2 instances of 2 minutes the process is ended. This is where you could start a new process or update a database.
int intNumberOfTimesFoundAtLocation = 0;
void OnLocationResult(object sender, Android.Locations.Location location)
{
decimal currentLatitude = Convert.ToDecimal(location.Latitude);
decimal currentLongitude = Convert.ToDecimal(location.Longitude);
decimal destLatitude = Convert.ToDecimal(this.dblDestLatitude);
decimal destLongitude = Convert.ToDecimal(this.dblDestLongitude);
var atLocation = locationQ.atLocation(currentLatitude, currentLongitude, destLatitude, destLongitude);
if (ayLocation == true)
{
intNumberOfTimesFoundAtLocation = intNumberOfTimesFoundAtLocation + 1;
if(intNumberOfTimesFoundAtLocation == 2)
{
client.RemoveLocationUpdates(locationCallback);
}
}
}
I call this function to start the process
MyLocationCallback locationCallback;
FusedLocationProviderClient client;
public async void StartLocationUpdatesAsync()
{
// Create a callback that will get the location updates
if (locationCallback == null)
{
locationCallback = new MyLocationCallback();
locationCallback.LocationUpdated += OnLocationResult;
}
// Get the current client
if (client == null)
client = LocationServices.GetFusedLocationProviderClient(this);
try
{
locationRequest = new LocationRequest()
.SetInterval(120000)
.SetFastestInterval(120000)
.SetPriority(LocationRequest.PriorityHighAccuracy);
await client.RequestLocationUpdatesAsync(locationRequest, locationCallback);
}
catch (Exception ex)
{
//Handle exception here if failed to register
}
}
}
class MyLocationCallback : LocationCallback
{
public EventHandler<Android.Locations.Location> LocationUpdated;
public override void OnLocationResult(LocationResult result)
{
base.OnLocationResult(result);
LocationUpdated?.Invoke(this, result.LastLocation);
}
}
Create a foreground service.
Inside service call the following code to start the request updates.
locationLogger = new LocationLogger();
locationLogger.LogInterval = _currentInterval;
locationLogger.StopUpdates();
locationLogger.StartRequestionUpdates();
Check here for the code
Let me know if you need more help.
I have a web api call that I recently added to my app. I returns a complete list of all countries, states and cities in the app (currently 486 rows) I perform this call when all of the reference data for my application loads (I have a base loading page and call the function in my startup class to load all the data there). The challenge is that the call to get all my countries.... hangs and eventually I get "The operation was canceled" error. If I modify my stored procedure that selects the data from the database on the server to only return say 20 rows, it runs fine. Any suggestions?
Below is the code from the startup class:
using System;
using System.Diagnostics;
using System.Threading.Tasks;
namespace GBarScene
{
class StartUpClass
{
public event GeneralDataLoad BaseDataLoadComplete;
public async Task<GBSStartUpEventArgs> ProcessStartup()
{
GBSStartUpEventArgs lobj_EventArgs;
lobj_EventArgs = new GBSStartUpEventArgs();
App.InStartUpDataLoad = true;
try
{
if (!App.IsGeolocationEnabled)
{
lobj_EventArgs.ErrorOccurred = true;
lobj_EventArgs.ShowRetry = true;
lobj_EventArgs.ShowWebSite = false;
lobj_EventArgs.ErrorMessage = resourcestrings.GetValue("NoLocationServicesMessage");
}
else if (!App.InternetIsAvailable)
{
lobj_EventArgs.ErrorOccurred = true;
lobj_EventArgs.ErrorMessage = resourcestrings.GetValue("NoInternetConnectionFound");
lobj_EventArgs.ShowRetry = true;
lobj_EventArgs.ShowWebSite = false;
}
else
{
Debug.WriteLine("Process StartUp");
await Task.Delay(500);
//Reset values
ViewModelObjects.DayOfWeek.DataLoadProcessed = false;
ViewModelObjects.Languages.DataLoadProcessed = false;
if (await ViewModelObjects.DayOfWeek.LoadData() == false)
// //try it once more
await ViewModelObjects.DayOfWeek.LoadData();
Debug.WriteLine("GBar After DayofWeek Load");
await ViewModelObjects.Languages.LoadData();
Debug.WriteLine("GBar After Languages Load");
if ((ge_AppMode)ViewModelObjects.AppSettings.AppMode == ge_AppMode.CitySelected)
{
//We need to reload the NearbyCities and set the selected one
await ViewModelObjects.NearbyCities.LoadData();
}
Debug.WriteLine("Before load of coutries");
await ViewModelObjects.CountryStateCity.LoadData();
Debug.WriteLine("After load of coutries");
Debug.WriteLine("Count: " + ViewModelObjects.CountryStateCity.CountryItems_ForList.Count.ToString());
ViewModelObjects.NumberOfResults.LoadData();
ViewModelObjects.Perspectives.LoadData();
ViewModelObjects.SearchRadiuses.LoadData();
ViewModelObjects.UseMetric.LoadData();
while (!ViewModelObjects.DayOfWeek.DataLoadProcessed && !ViewModelObjects.Languages.DataLoadProcessed && !App.IsGeolocationEnabled)
{
await Task.Delay(100);
}
if (App.BaseDataLoadError)
{
lobj_EventArgs.ErrorOccurred = true;
lobj_EventArgs.ShowRetry = true;
lobj_EventArgs.ShowWebSite = true;
lobj_EventArgs.ErrorMessage = resourcestrings.GetValue("ErrorLoadingReferenceData");
}
}
Debug.WriteLine("StartUp Process Ended");
BaseDataLoadComplete(this, lobj_EventArgs);
}
catch (Exception ex)
{
App.ProcessException(ex);
}
App.InStartUpDataLoad = false;
return lobj_EventArgs;
}
}
}
This is the helper class that makes all the WebAPI calls:
using Newtonsoft.Json;
using System;
using System.Diagnostics;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Xamarin.Forms;
namespace GBarScene
{
public class WebAPICaller: IDisposable
{
HttpClient iobj_HTTPClient = null;
public void Dispose()
{
if (iobj_HTTPClient != null)
iobj_HTTPClient.Dispose();
}
public async Task<string> HTTPGetWebServiceAsync(string ps_URI)
{
string ls_Response = "";
string ls_JSONData = "";
string ls_Prefix = "";
try
{
iobj_HTTPClient = await GetClient();
switch (Device.RuntimePlatform)
{
case Device.Android:
ls_Prefix = App.APIStandardPrefix;
break;
//case Device.Android:
// ls_Prefix = App.APISecurePrefix;
// break;
//case Device.Windows:
//case Device.WinPhone:
// ls_Prefix = App.APISecurePrefix;
// break;
default:
ls_Prefix = App.APISecurePrefix;
break;
}
Debug.WriteLine("before api call");
iobj_HTTPClient.BaseAddress = new Uri(ls_Prefix);
ls_JSONData = await iobj_HTTPClient.GetStringAsync(ps_URI);
Debug.WriteLine("after api call");
ls_Response = System.Net.WebUtility.HtmlDecode(ls_JSONData);
}
catch (Exception ex)
{
Debug.WriteLine("api call error");
App.ProcessException(ex);
}
return ls_Response;
}
public async Task<bool> HTTPPostWebService(string ps_URI, object pobj_BodyObject)
{
HttpResponseMessage lobj_HTTPResponse = null;
bool lb_Response = false;
HttpContent lobj_Content = null;
try
{
if (iobj_HTTPClient != null)
iobj_HTTPClient = await GetClient();
iobj_HTTPClient.BaseAddress = new Uri(App.APISecurePrefix);
lobj_Content = new StringContent(JsonConvert.SerializeObject(pobj_BodyObject == null ? "" : pobj_BodyObject));
lobj_Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
lobj_HTTPResponse = await iobj_HTTPClient.PostAsync(ps_URI, lobj_Content);
if (!lobj_HTTPResponse.IsSuccessStatusCode)
{
Exception lobj_Exception = new Exception(lobj_HTTPResponse.ToString());
lobj_Exception.Source = "HTTPGetWebService for: " + ps_URI;
App.ProcessException(lobj_Exception);
}
else
{
lb_Response = true;
}
}
catch (Exception ex)
{
App.ProcessException(ex);
}
finally
{
if (lobj_HTTPResponse != null)
{
lobj_HTTPResponse.Dispose();
}
//Debug.WriteLine("WebAPICaller-CallWebService-1: Done");
}
return lb_Response;
}
private async Task<HttpClient> GetClient()
{
HttpClient lobj_HTTPClient = null;
if (lobj_HTTPClient == null)
{
lobj_HTTPClient = new HttpClient();
lobj_HTTPClient.DefaultRequestHeaders.Add("Accept", "application/json");
lobj_HTTPClient.MaxResponseContentBufferSize = 2147483647;
lobj_HTTPClient.Timeout = new TimeSpan(0,0,0,0,60000);
}
return lobj_HTTPClient;
}
}
}
Sorry I forget to include the method in the CountryStateCity view model that calls the webapi helper class.
public async Task<bool> LoadData()
{
string ls_Response = "";
string ls_WorkURI = "";
WebAPICaller lobj_WebAPICaller = null;
bool lb_DataLoaded = false;
try
{
IsDataLoaded = false;
//Debug.WriteLine("City Data Load");
lobj_WebAPICaller = new WebAPICaller();
ls_WorkURI = ic_CoutryStateCityAPIUrl.Replace("{Language}", "EN");
ls_Response = await lobj_WebAPICaller.HTTPGetWebServiceAsync(ls_WorkURI);
if (ls_Response.Trim().Length == 0)
{
AddErrorEntry();
}
else
{
CountryItems_ForList = new ObservableCollection<GBSCountry_ForList>();
StateItems_ForList = new ObservableCollection<GBSState_ForList>();
CityItems_ForList = new ObservableCollection<GBSCity_ForList>();
iobj_CountryStateCity = JsonConvert.DeserializeObject<ObservableCollection<GBSCountryStateCity>>(ls_Response);
//Now load the display lists
CountryItems_ForList = new ObservableCollection<GBSCountry_ForList>(
(from lobj_Country in iobj_CountryStateCity
select new GBSCountry_ForList()
{
ID = lobj_Country.Country_Code,
Value = lobj_Country.Country_Name_Text
}).Distinct().ToList());
CountryItems_ForList.Insert(0, new GBSCountry_ForList
{
ID = "XX",
Value = "Base Value"
});
lb_DataLoaded = true;
}
}
catch (Exception ex)
{
AddErrorEntry();
App.ProcessException(ex);
}
finally
{
IsDataLoaded = true;
if (lobj_WebAPICaller != null)
lobj_WebAPICaller.Dispose();
}
return lb_DataLoaded;
}
So after much time, I believe I figured out what the problem is. The problem started to manifest itself again with smaller amounts of data and I could not figure out why. The problem appeared. The issue appears to be the IP address I was using. (I was using the IP address of the actual laptop I was hosting both the App and WebAPIs on.) It appears you have to use one of the other network adaptors for the emulator to have this work reliably.
Here are the steps I used to resolved this:
I launched my Windows 10 mobile emulator.
Click on the >> (Tools) icon in the tool bar of the emulator.
Click on the Network tab of the Additional Tools window.
Look in the list for the network adaptor labeled Desktop Adaptor #1 and copy the IP address.
Edit the Applicationhost.config file in the folder of the WebAPI project.
Find the entry in the file for site name="XXXXX" where XXXXX is the name of the Visual Studio project you are hosting your WebAPIs in.
Within the section of the entry for your WebAPI project, add a binding for the IP address you copied from in step 4. It should look something like this:
<binding protocol="http" bindingInformation="*:56952:169.254.69.220" />
Where 56952 is the port my IIS Express is hosting the WebAPIs on and 169.254.69.220 is the IP address I copied from step 4. After adding this, I was able to connect to locally hosted WebAPIs in IIS Express.
Hope this helps.