Android Question GoogleMap Marker Click event

[Anser]

Hi

On one of the activities in my app, the screen is split horizontally into 2 portions ie on the top portion, I have Google Maps and the bottom portion I have few labels.

On the Google Maps I have placed around 20 to 25 markers. The markers are placed on the Google Maps based on the latitude & longitude data picked from the remote database. When the user clicks on a marker, I need to pick more details regarding the clicked marker from my database and display it on the labels placed below the Google Maps.

I need to identify the marker clicked, so that I can pick more information about the Marker from the database.

I have used the regular Google Maps and NOT the GoogleMapsExtra

Any help will be appreciated.

Regards
Anser

 

[DonManfred]

From the GoogleMaps xml

MarkerClick (SelectedMarker As Marker)

I guess you should use this event to get the marker...

 

[eurojam]

you will have to put your markes to a map (the collection structure, not google map), something like:

'define your map in sub globels
Private Markers1 As Map
'...later anywhere in your code create a marker and put it to the map as key   
Dim aMarker As Marker = GoogleMap1.AddMarker(lat1,lon1,"myTitle")
Markers1.Put(aMarker, "somevalues..or object.")

'later when you need the marker again and connect it to your information
aObject = Markers1.get(aMarker)

 

[Anser]

eurojam,
I have used Maps collection as you sugested and all the marker details are available in the Maps collection. How do I know which marker was clicked by the user ?

Regards
Anser

 

[Erel]

The relevant marker is passed as a parameter to MarkerClick event.

 

[eurojam]

you can do it like Erel described, but then you will have this balloon-stuff on your map....if you don't want a balloon but something else like a panel filled with information about the marker you will have to do something with googlemapsextras. First definening an InfoWindowAdapter in the Sub MapFragment1_Ready:

...
Dim InfoWindowAdapter1 As InfoWindowAdapter
InfoWindowAdapter1.Initialize("InfoWindowAdapter1")
GoogleMapsExtras1.SetInfoWindowAdapter(GoogleMap1, InfoWindowAdapter1)
...

and later

Sub InfoWindowAdapter1_GetInfoWindow(Marker1 As Marker) As View
' the default InfoWindow will be used if this event Sub is not defined or if it returns Null
'do something with your marker
aObject = Markers1.get(Marker1)
...
'and show a transparent label on the map instead of the balloon
   Dim InfoWindowLabel As Label
   InfoWindowLabel.Initialize("")
   InfoWindowLabel.Color=Colors.Transparent
   InfoWindowLabel.TextColor=Colors.Transparent
   Return InfoWindowLabel
End Sub

 

[DonManfred]

The relevant marker is passed as a parameter to MarkerClick event.

i already answered this in post #2 which is liked by anser. But he does not make use of the info it seems :-(

 

[Anser]

i already answered this in post #2 which is liked by anser. But he does not make use of the info it seems :-(

I was wondering how to implement the click event as initially I could not find any event associated with the MapFragment.
I was dump and didn't think about the option available in the designer to check the events associated with the MapFragment. It was available via the designer's menu Tools->Generate Members.

Sometime our brains doesn't work.
Finally discovered
Sub MapFragment_MarkerClick


Actually with my question to eurojam "How do I know which marker was clicked by the user ?" was to understand how to track the clicked marker. I mean, we don't have the TAG property in Marker to store additional information for eg Record_ID. Now I have used the Marker.Snippet, not an elegant solution. For the time being its serving the purpose.