In my android app, the user is able to turn off the GPS.
Because I need sometimes of the GPS and I want also ask the user to turn on the GPS again.
But the user is able to mark for not appears more this warning.
Use LocationListener which has the method onProviderDisabled. This method gets called everytime the user turns off the GPS provided you have set the Location Provider to be GPS.
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I am making a small app, when the user clicks the button the app gets the users location and opens Google maps.
The problem is, if the users mobile doesn't have GPS enabled , then enables it and clicks the button again, this method will return null:
location = service.getLastKnownLocation(provider);
When I wait after enabling GPS and then click the button, the method will work correctly and return the location.
How can I solve this problem?
why need to wait some second after enable GPS,to work?
It's because when you enable GPS it'll fix position of Satellite and based on that you'll able to get Location.
It is obviously a default behaviour, when you stop GPS and start it again, there is a small gap between start and stop, at that point, GPS will do its task, to get satellite data and after that it will provide you location. If we want to drive fast then we must need to start from 1st gear, same behaviour GPS doing.
As the answers mention above, the device will get the location after a while. If you are in the middle of a flow, you can show a ProgressSpinner and poll getLastKnownLocation() for x seconds to get a location.
If you hadn't used GooglePlayServicesClient try this to get user location.
It is the fastest way to get current lat long.
For reference and code use the following link.
http://developer.android.com/training/location/retrieve-current.html
Hop i helped you.
I'm making an app that uses;
map.setMyLocationEnabled(true)
This is in the onCreate. However I feel it is not right to have users always have location on. There must be an option to turn it off.
I would like a alert/message box (I'm unaware of the technical name) on the app open asking whether the user wishes to turn the location services on, or keep it off.
How does one do this?
setMyLocationEnabled Won't actually enable the user's GPS. The user will have to do that by himself otherwise the location will not function.
Just to show that this is true, here's a some-what opposite question that I answered: Android google map on click of current location button show alert box if gps not enabled
when I turned on gps with code,gps icon blinking in notification bar.but when I go to location setting, I see use gps sattelite option dont checked and I can not show location on phone maps.
when I go to location setting and checked use gps sattelite option, I can see my location on maps, but gps icon blinking yet on notification bar.
I think gps is not enabled actually, is right?
Correct. GPS is most likely not enabled. Starting a long time ago, you cannot directly toggle GPS on/off.
You can send an intent that brings users to the settings screen, where they can change it themselves. See this question for more details on that.
i have an app that takes the user exact GPS location and save it to a database when he presses a button.
i need his exact location(i.e location that is Fixed with GPS)
i used onLocationChanged() and GPS_EVENT_FIRST_FIX, but the problem was if the user was standing still and already had a fix, then he pressed a button, the app would wait as it neither of the above will launch.
and i was wondering if there was any way i can check if the GPS already has a fix on the device's location.
I am writing a program in Android that uses GPS. It will prompt the user to turn on location services if it is not on (which I guess is equivalent to turning on gps ?). My question is: does the gps immediately start consuming extra battery power as soon as location services is turned on or it uses batter power whenever the location services is queried/used for a new location ?
The GPS starts working only when the location manager requests an update from it. Turning on the GPS in the device only allows programs to request locations if they want, but it doesn't mean the GPS is kicking in.
You can test it yourself: The GPS icon in the notification bar tells the GPS status. You can turn on the GPS, but the icon won't appear. Why? No application requests updates now. As soon as an application requests an update, the icon starts blinking (The GPS is initializing itself) and when it stops, it means the GPS is initialized and is currently receiveng updates.
The GPS consumes battery only when this icon appears.
My company wrote a blog post on this subject a while back. Check to see if its useful.
http://www.littleeye.co/blog/2013/03/29/understanding-gps-resource-usage/
But we missed talking about what happens when no app is actually requesting for a location update. And yes, as mentioned unless apps actually ask for a location update, they will not cause power drain. But note that even a single request for a location update (depending on coarse or fine grained request) can have unintended effects, as the device has to go thro various states before it can get back to its steady state.
Turning on location services is just permission given by user to applications for using location services. As long as any application not asks for location, power consumption is the same as with location sesrvices turnded on.
On the other hand - there is many applications trying to get location. Facebook, Camera, Android, many of ads libs, so yes - user can get battery life issues when GPS is unlocked.