onLocationChanged not called on some devices

Question

This is a question which has been asked numerous times but I could not find a solution that always works.

I am developing an application using the Fused location pro

Answer 1

See if you're getting a passed location by testing for if (loc == null). Even though it's the same provider, maybe one device is coming back null and bombing out, resulting in a look like it's not firing.

Answer 2

try to remove and reinstall "google play services". Install it from google market link bellow, google play services

Answer 3

This maybe non-sense but I have faced this problem before, someone suggested that you should create your own LocationListener instead of letting your MainActivity implements LocationListener. Basically this:

locationclient.requestLocationUpdates(lr, your_location_listener);

Hope this helps.

Answer 4

lr.setInterval(100); 

with it your interval is 0,1 second so it very hard for gps chipset to detect location. Your interval should be > 1 second.(with me it is > 10)

locationRequest it should be set:

setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY) because PRIORITY_BALANCED_POWER_ACCURACY in outdoor it doesn't get location . Code will look like :

lr=LocationRequest.create();

lr.setInterval(5 * 1000);// 5s

lr.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationclient.requestLocationUpdates(lr, this);

Hope this help.

Answer 5

I solved this by setting both parameters, minimum distance and minimum time between updates to 0. As per what I have tested on 2 devices, now onLocationChanged() is being called regularly after requesting for updates.

Answer 6

I observed same behavior on Galaxy Nexus and recognized two things causing onLocationChanged() to not being called. There are

1. Corresponding location source is not enabled in System Settings. For PRIORITY_HIGH_ACCURACY the GPS satellites must be enabled, for PRIORITY_BALANCED_POWER_ACCURACY Wi-Fi & mobile network location must be enabled.

2. Even for the enabled location sources there can be no valid location information available. For instance, PRIORITY_HIGH_ACCURACY source is enabled, but there is no (or not good) GPS reception (e.g. device is inside a building). Or PRIORITY_BALANCED_POWER_ACCURACY source is enabled, but both Wi-Fi and mobile data are switched off. In those cases location cannot be detected and onLocationChanged() will not be called.

To fix #1 I had to check whether required location sources are enabled even before connecting to Google Services API and if they are switched off, then I notified a user asked him/her to allow location access.

To solve #2 I decided to use LocationRequest.setExpirationDuration(). I set timeout at about 10 seconds, and immediately after calling requestLocationUpdates() I post a callback delayed by same 10 seconds. If delayed callback is called before requestLocationUpdates(), this means location cannot be detected due to reason #2. I do three retries and then show user an error message.

Android documentation is not great at this place, that's why I hope this helps.