I'm trying to develop an android application which can acquire GPS location without using Internet and even network location using SIM. Actually, SIM will be inserted in phone and i know that location upto 500m accurate can be acquired through it. But in case of no SIM signals in the area, is it possible to acquire location?
Yes, you can use GPS without any external data connection because signals from the GPS satellites are receive-only.
On a device, the permission setting is known as device-only location mode:
Device only
This mode uses only GPS. It doesn’t use Google's Location service to provide location information. It can estimate your device's location slower and use more battery.
Yes You can get the coordinates but for using map services you need internet.The only thing is your GPS will take a bit longer to lock your location on a cold start, and it might not be quite as accurate.
It's a aGPS (Assisted GPS), and get's part of the location information from the data network (If available) on cold start, then fine-tunes the location further than what a GPS alone can do.
Shouldn't be an issue however, really. Just turn your GPS on a little sooner (Like while getting ready to leave, not waiting until you are in your car).
Yes. If you use the Location Manager, set the Provider to LocationManager.GPS_PROVIDER. If you use Google Play Services, it should work automatically.
Related
Android is constantly changing. Currently, the Fused Location API is being used for location detection. But in my experience, without a Data connection, the GPS signal is not being found anymore.
How do I use the device's GPS only whenever there is no internet available?
Fused location provider uses a hybrid way to find gps using a variety of sensors, WIFI/data and the actual GPS chipset.
It will find the location COARSE/FINE accuracy is up to your case. It will just take a while longer than with the internet connection. If indoors or in an isolated area, it may very well take over a minute or two. Sometimes if the data signals just don't reach the device, yes it can fail.
It does work without WIFI or DATA in most cases.
I am trying to design an app which requires current location of the user time and again. So, whenever cellular data is available, i use mobile network to get the current user location. If mobile network is not available, can I reliably use GPS to get access to current location. If not, can anyone suggest what should I do in such cases?
Edit: Location services doesn't work very well. I already tried using it.
I think you should take a look at Android Location APIs:
https://developer.android.com/google/play-services/location.html
Android uses what they call Fused location provider. It is Android (through Google play services) responsability to choose which provider (GPS, sensors, WIFI fingerprinting...) is best each time to get current user location.
I think it is a great technology and APIs are really simple to use
According to Google Docs:
Knowing where the user is allows your application to be smarter and deliver better information to the user. When developing a location-aware application for Android, you can utilize GPS and Android's Network Location Provider to acquire the user location. Although GPS is most accurate, it only works outdoors, it quickly consumes battery power, and doesn't return the location as quickly as users want. Android's Network Location Provider determines user location using cell tower and Wi-Fi signals, providing location information in a way that works indoors and outdoors, responds faster, and uses less battery power. To obtain the user location in your application, you can use both GPS and the Network Location Provider, or just one.
If you want more detail you can take a look at :
http://developer.android.com/guide/topics/location/strategies.html
yes If there is no Network available then you can go for GPS but we must use it smartly and efficiently
because GPS give much accurate location than network, but it reduce the battery life and also you can use Pending Intent for getting location and broadcast receiver at the place of Location Listener
but I suggest you this link with light this topic in much detail
These are some smart coding concepts for increasing battery life
Hi I am working on a project which requires fetching of user's current coordinates and I am fetching it in high accuracy mode.
Ever since I started testing out this application in my device I have noticed that my money is getting deducted from my balance I am not sure why is it happening.
I currently dont have a data pack and my mobile data is turned of in my device but I am connected to wifi. Even if some application is using internet for some purpose it should make use of the my wifi connection right?
Can anyone please explain me why is my balance getting deducted (if you have faced similar issue) ? Is it really because of the fetching of location in high accuracy mode ?
Thanks.
Edit
I get this dialog box frequently:
GPS coordinates on a android device (or any device for that matter) is received in 2 ways.
From a GPS hardware that connects to your GPS Satellites
From your network, via the GPS location of the tower to which your SIM card is connected to.
The GPS hardware connects to multiple satellites and approximates your location to a point. And this location is the most accurate you can get. It consumes a lot more battery and decipates a lot more heat on the devices, since a lot of current is needed to read from the GPS satellites. This does not use the network at all. If your SIM card cannot make phone calls/and/or/data even then this location can be received.
Your network GPS also does similar, but it takes GPS coordinates of the towers closeby (to which the SIM card is connected to, and then approximates the location of your device. This GPS location (in comparison with the GPS hardware) calculates a less accurate. This consumes GPRS/3G data bandwidth and you will be charged for this.
Both the hardware are completely independent.
Now, some smart ass developers in Google have used sensors like compass, rotation, movement to develop something called AGPS, which takes the GPS location from the GPS hardware, and then uses network and sensor information to ensure that your location is known without use of too much power, and there by lesser heat decipation. This is called AGPS.
I have make an android application which help us to get GPS Location using A-gps in my android phone. I am getting latitude and longitude successfully in Metro Cities of my country, but when I am going to some forest area,GPS do not get location and for this I need to run GPRS of my phone,after running google map once in my phone ,GPS successfully gets latitude and longitude even if I closes my internet connection or remove sim card from my phone. But since I do not want to use google map, what should I do now and why it is happening?? Any help will be appreciable
It takes a long time (several minutes) to get the GPS location with high precision. However, if you enable network based location (e.g. cell tower, WiFi), it's way faster but with lower precision.
As a result, you should listen to all the providers with LocationManager, and figure out which provides the best location. Or, if your app targets Android 8 and above, you can use the Location APIs provided with Google Play Services, which hides the details as using LocationManager directly.
First make sure that it is not the fault of your phone or its operation system version.
Download a well working known GPS App, look if they get a GPS signal without internet.
Place it under very good cointions: free view to sky, outside dense city, at least an open place.
You should get a signal within one minute, maybe if the phone has a poor built-in GPS antenna, a bit more, wait some minutes.
If the well working foreign app still don't get GPS it's an Operating system bug.
If you get one, then it´s your fault, and it is worth for further investigation.
*first check your GPS working or not properly with **ANDROITS GPS TEST*.
if it finds and fixes satellite do not worry. as AGPS is fast , standlone GPS needs to have much more time to fix on its own especially in city as many radio waves disturbs GPS fixure.
better first fix with AGPS and then you can turn off data or internet, still it will work as it already had its location and satellites fixed.
with standlone GPS it takes huge time and battery.**
If your phone use GPS h/w to get the location information, it don't require any internet connection. It should be able to get the location fix using GPS without the help of internet. But it may take some time to get the location fix.
You can install the this free app from play-store to test the GPS of your phone : "TestYourGPS".
https://play.google.com/store/apps/details?id=com.eorsavik.testyourgps
I'm working in android (developing application for mobile and tablets). I am using android version is 2.2.
In my application, I want to capture the longtitude,latitude.
My suprevisor is said to me capture the locations using GPS,AGPS,LBS
I'm new to android .I does not know GPS,AGPS,LBS.
Please send me the details, what are the difference,advantages,disadvantages of these 3?
Don't compare LBS with GPS and AGPS. LBS stands for Location based services . It's a service done with the help of GPS/AGPS . For example 'Requesting the nearest business or service, such as an ATM or restaurant' is a service required by a user. There are many applications available for to provide above service. Those application will use either GPS/AGPS to find the location and service to user based on the location fetched.
So simply any application which use location to serve users are considered as LBS.
Following is the difference between GPS and AGPS
The difference between GPS and A-GPS is actually pretty straightforward. A GPS phone comes with a built-in GPS chip. GPS, short for Global Positioning System, is typically used to determine the location, speed, direction and time of the device. So, for example, in the case of the Mobile, when GPS is activated on the unit, the system would be able to triangulate the position of the receiver when three or more satellites are connected. And since it is able to calculate speed and direction, GPS is also commonly used as a navigation device while driving.
A-GPS (Assisted-GPS), on the other hand, was developed to enhance the performance of GPS. This is especially useful in environments where the GPS chip may have difficulty in getting a satellite signal, such as an urban canyon, or places where there is too much overhead obstruction. What A-GPS does is it leverages on an intermediary called an Assistant Server which provides information on cell ID or other data to help the device identify the right satellites to connect to. This shortens the time needed for a location lock although certain A-GPS solutions require an active connection to a cell phone network.
Pros and Cons of GPS and AGPS:
The realiability and Accuracy is high in the GPS and it is low in AGPS.
The location captured by AGPS is not as accurate as GPS.
The location capturing via GPS is time consuming and power (Battery) consuming, etc.
Hope it helps. For more details on A-GPS
GPS - Global positioning system -> get your location via satellites
AGPS - Assisted GPS -> get your location via satellites and network providers
LBS - Location Based Services -> doesn't have much to do with getting your location.
Basically, in Android you can get your location using following providers:
Network: get your location based on your wifi connection. fairly fast, but not so accurate
GPS: get your location based on GPS receiver. fairly slow, but quite accurate
so you have a trade-off: either to use Network provider and get your results fast, or to use GPS provider and get more accurate data.
Read more here:
http://developer.android.com/guide/topics/location/strategies.html
LBS - Location Based Services
GPS - Global Positioning System
AGPS - Assisted Global Positioning System
LBS
As abbas.aniefa said, We can't say differences of LBS over GPS and AGPS. It is the service which uses GPS/AGPS to find location. Android provides a number of building blocks for location based services.
GPS
GPS, the Global Positioning System run by the United States Military.
This provider determines location using satellites.
Depending on conditions, this provider may take a while to return a location fix.
Advantages
It will give our location accurately,
It will work fine in out-door locations.
Disadvantages
It may be very very slow in in-door locations,
It will quickly drain battery.
It will be slower than network provider.
A-GPS
A-GPS - Assited GPS. Normal GPS can take a long time to get a position fix. For this reason most cell phone companies have the GPS in the phone turned off except for emergency calls and for services they sell you (such as directions).
A-GPS will come under network location provider category because it uses GPS chip on device, as well as assistance from the network (cellular network) to provide a fast initial fix.
Advantages
It will give our location very accurately in-door location itself,
Drainage of battery will be saved,
It will be faster than GPS Provider.
Disadvantage
We can not use it with GPS alone. It will depend on network connection.
Over all Differences of GPS and A-GPS
GPS
Uses GPS chip on the device,
Line of sight to the satellites,
Need about 7 to get a fix,
Takes a long time to get a fix,
Doesn’t work around tall buildings.
A-GPS
Uses GPS chip on device, as well as assistance from the network (cellular network) to provide a fast initial fix,
Very low power consumption,
Very accurate,
Works without any line of sight to the sky,
Depends on carrier and phone supporting this (even if phone supports it, and network does not then this does not work).
I think GPS is done/processed via satellite communication without any network service provider.
The AGPS is done/processed via the network (which is provided by service provider such as Airtel,Vodafone,etc).We should pay for service provider for usage of network.
The LBS is processed through the AGPS.
I dont know whether my points are correct or not.Im heard from others and put it.
All are welcome to give their suggestions,ideas,etc.