Hello! I am working on a GPS tracking application that uses the Google Maps library. The goal of this app is to display the location of given coordinates at the center of the map. Initially, I was using another GPS library to obtain the device's coordinates and send the data to the map whenever the location changed, so that the map would center on the new coordinates.
However, after researching, I realized that the Google Maps library can also retrieve the user's location, so I decided to eliminate the GPS library and use a 'Timer' to periodically obtain coordinates directly from the Google Maps library. I would like to know if any of you know whether the Google Maps library has an event that triggers every time the user's location changes. This way, I can avoid using the Timer altogether. Alternatively, if anyone knows how to make the map automatically stay centered on the user's position, that would be very helpful too.
This is the way I centered the map using a timer
However, after researching, I realized that the Google Maps library can also retrieve the user's location, so I decided to eliminate the GPS library and use a 'Timer' to periodically obtain coordinates directly from the Google Maps library. I would like to know if any of you know whether the Google Maps library has an event that triggers every time the user's location changes. This way, I can avoid using the Timer altogether. Alternatively, if anyone knows how to make the map automatically stay centered on the user's position, that would be very helpful too.
This is the way I centered the map using a timer
B4X:
#Region Shared Files
#CustomBuildAction: folders ready, %WINDIR%\System32\Robocopy.exe,"..\..\Shared Files" "..\Files"
'Ctrl + click to sync files: ide://run?file=%WINDIR%\System32\Robocopy.exe&args=..\..\Shared+Files&args=..\Files&FilesSync=True
#End Region
'Ctrl + click to export as zip: ide://run?File=%B4X%\Zipper.jar&Args=Project.zip
Sub Class_Globals
Private Root As B4XView
Private xui As XUI
Private gmap As GoogleMap
Private MapFragment1 As MapFragment
Private t As Timer
End Sub
Public Sub Initialize
' B4XPages.GetManager.LogEvents = True
If MapFragment1.IsGooglePlayServicesAvailable = False Then
MsgboxAsync("Please install Google Play Services.", "Google Play Services")
End If
t.Initialize("Click", 3000)
t.Enabled = True
ToastMessageShow("Timer ok", False)
End Sub
'This event will be called once, before the page becomes visible.
Private Sub B4XPage_Created (Root1 As B4XView)
Root = Root1
Root.LoadLayout("MainPage")
B4XPages.SetTitle(Me, "Google Maps-Tracker")
Dim rp As RuntimePermissions
rp.CheckAndRequest(rp.PERMISSION_ACCESS_FINE_LOCATION)
Wait For Activity_PermissionResult (Permission As String, Result As Boolean)
gmap.MyLocationEnabled = Result
End Sub
'You can see the list of page related events in the B4XPagesManager object. The event name is B4XPage.
Sub MapFragment1_Ready
Try
gmap = MapFragment1.GetMap
Catch
Log("MapFragment1: " & LastException)
End Try
End Sub
Sub Click_Tick
Dim Camera As CameraPosition
Camera.Initialize(gmap.MyLocation.Latitude, gmap.MyLocation.Longitude, 17) '10 Lejos. 15 mas cerca
gmap.AnimateCamera(Camera)
End Sub
