Android Tutorial Google Maps with FusedLocationProvider

Google Maps uses the GPS as its location provider. It will not show the current location if GPS is disabled.
It is possible to switch to a custom location provider.

For example, here is me traveling in Antarctica:

The attached example uses FusedLocationProvider to inject the location.

The steps to create a custom location source are:

1. Create the LocationSource object with JavaObject.
2. Handle the LocationSource_Event. It will raise when the source is activated.
3. Set the map source by calling setLocationSource.
4. Call LocationChangedListener.onLocationChanged method to inject locations.

These steps are done in the starter service.


You need to open the manifest editor and set your api key.

 

[BillMeyer]

@Erel - and you are doing all this from Antarctica - impressive - Thank You !! - Just don't freeze - we need you !!

 

[peacemaker]

Thanks, Erel !
So, if GPS is disabled - it's needed to set another LocationSource with PRIORITY_BALANCED_POWER_ACCURACY ?

 

[Erel]

I expect that FusedLocationProvider will do it automatically. Try it.

 

[peacemaker]

Tried. And do not understand now what we can get from Google Map - gmap.MyLocation.IsInitialized is anyway false.
FLP_LocationChanged occurs only if GPS is allowed.
Map is visible, but no current position anyway

How to setup the code sample to be in Antarctica ?

 

[Erel]

Works properly here with the location mode set to battery saving.

Maybe your device doesn't know its location.

How to setup the code sample to be in Antarctica ?

Go over the starter service code. See how it updates the location.

 

[EduardoElias]

based on this, can i avoid to have the COARSE_LOCATION and FINE_LOCATION in manifest?

today I have
RemovePermission(android.permission.ACCESS_COARSE_LOCATION)
RemovePermission(android.permission.ACCESS_FINE_LOCATION)

on manifest, the reason is that my app will be incompatible with some tablet if I declare this permission.

However I need to use google maps, i was using it by browser and was somewhat working (some old tablets does not work properly)

I wanted to switch to the google maps views. I have the coordinates based on ZIPCODE what is all that I need from start and target and what to use this on the map, eventually even make the route.

Is this FusedLocation the way to go?

 

[Erel]

FusedLocationProvider requires these permissions (at least COARSE_LOCATION).

The permission itself will never cause your app not to be compatible if you do it correctly. Start a new thread in the questions forum and I'll explain.

 

[Peter Simpson]

FLP has been deprecated by Google, it has been replaced by FLPC. FPL works great in my projects, actually it runs flawlessly in fact.

Old: https://developers.google.com/andro...android/gms/location/FusedLocationProviderApi

New: https://developers.google.com/andro...roid/gms/location/FusedLocationProviderClient

 

[tomky]

Hi.

Why in this exercise, when you add the Sub Activity_Pause and you minimize the exercise, a dialog appears saying that the application has stopped?
And it appears in the log java.lang.Exception: Sub activity_pause signature does not match expected signature.

This happens on my emulator with several APIS, and on my Android device with API 17.

Thank you.

 

[Peter Simpson]

Hi.

Why in this exercise, when you add the Sub Activity_Pause and you minimize the exercise, a dialog appears saying that the application has stopped?
And it appears in the log java.lang.Exception: Sub activity_pause signature does not match expected signature.

This happens on my emulator with several APIS, and on my Android device with API 17.

Thank you.

That's probably because you didn't add UserClosed.

Sub Activity_Pause (UserClosed As Boolean)

End Sub

 

[tomky]

You are right. It was that nonsense.

Thank you very much Peter Simpson.

 

[tomky]

Hi.

Another question.

How can this Erel exercise work on devices with Androis 6+ (API 23+) without resorting to the RuntimePermissions library and keeping the sdkversion tarjet in API 22?

Thank you.

 

[Erel]

How can this Erel exercise work on devices with Androis 6+ (API 23+) without resorting to the RuntimePermissions library and keeping the sdkversion tarjet in API 22?

Please start a new thread for this question (or carefully read the runtime permissions tutorial).

 

[tomky]

Thanks Erel.
Only I wanted to know if it is essential to use RuntimePermissions so that this exercise works on Android 6+ devices.

 

[Erel]

The example was updated. It properly handled the runtime permission.

GoogleMaps v2.50+ is required: https://www.b4x.com/android/forum/threads/google-maps.63930/