Develop Reference

GPS Tracker Highly Fluctuating points

Hello I am developing a realtime gps tracker using this library
It gets data from GPS satellites in a period of time..if no gps results is received it then request from cell towers/wifi in a period of time also. My problem is..My gps location is fluctuating so bad. Here is a photo below:
Please if anyone there has used this library. Or can recommend to me how to ged rid of this fluctuations. Please help me out..Thanks

GPS can fluctuate when the device moves slowly or stands still.
Switching betweeen GPS and Network Location is not a good idea, (network will introduce jumps of e.g up to 1000m or eveen more)
If you have GPS always use GPS.
If fluctuations are caused by bad GPS signal, you can check the Location.getHoricontalAccuracy(): ignore the location if the value is > 30m and you are using GPS only.
If fluctuation is caused by slow movement or stand still, make sure this is the case and ask again for that specific topic, or search SO.

Cannot get current location until connected to the internet - Android GPS

my question title is kind of self explanatory.
When I want to get my current location, for the first time(after phone start up), I have to be connected to the internet.
After getting the location once, my app no longer needs the internet connection and the update happens just fine.
At first I thought there was something missing in my code, but I tried the in-build maps application, and it also couldn't get my location until I enabled data transfer.
This seems really strange to me, if I can get coordinates without net connectivity after the first coordinate is aquired, why do I need it in the first place?
So I was wondering 2 things,
1 - is there a work around to let me get my first Location without being connected
and
2 - if there is no work around is it practical to ask the user to enable it? I'm not 100% on this but I'm pretty sure I cant enable data programatically.
Would like to hear your opinions.
Thanks :)

Android devices use what's called aGPS - the a stands for assisted. The most basic I've seen it explained is that certain information has to be downloaded and a general, broad location identified in order to allow the GPS sensor to know where to look for the satellites. Once it has the information, it can find the GPS satellites, and is fine. There is no way for your app to get around that fact, I'm afraid.

Have you defined <uses-permission android:name="android.permission.INTERNET" /> in AndroidManifest.xml
If yes then check you internet connection:
Or
Check My Answer Here: Get current latitude and longtitude

GPS won't receive forced Lat Long values in Android Emulator

GPS provider won't receive any values either from Telnet or DDMS. Instead all forced values get sent to the Passive provider. Why is this? Everything I have read indicates it should be sent to the GPS provider.
Further, for some reason, GPS is picking up a value of 0, 0 as a default.
Can somebody explain why this might be happening?

Found the answer to this if anyone is curious.
You need to have code in there that makes a request to find an updated location, otherwise the telnet or DDMS values will not be passed to your emulator. They only get passed upon the code looking for updates.

Current signal strength on Android device

Is there anyway to get current signal strength on Android device. I know there is a way where you can listen for signal strength change, but i cannot wait and need to know the current signal strength.
Any help would be appreciated.
Regards,
B

You can register the PhoneStateListener and save the last updated value into a variable and access it whenever you need it. It is the closest approximation of signal strenght you can get in real time.

you can download https://play.google.com/store/apps/details?id=com.nolanlawson.logcat&hl=en
from the app store on your device and while you move in and out of an ssid it will show you the signal strength pretty accurately. Hope this helps. Cheers.

How to force android's locationlistener to fetch provider location?

I have written a small app that receives the location from mobile 3g/wifi by using locationManager & NETWORK_PROVIDER parameter.
according to google's api it will get the location i wish (the other option is using the GPS_PROVIDER)
what i really desired was the WIFI location. I wanted to see its behavior and how the phone gets its location (i.e with wireshark)
in order to do that, i changed into flight mode & activated wifi.
then, i launched the app and clicked the button which starts the NETWORK_PROVIDER location service by calling the requestLocationUpdates function with time parameter = 10.
what that actually happened is that i managed to get the location but saw no traffic at all in wireshark.
could it be that Google gives me the approx. location in advance, when connecting to the wifi? (its the only explenation)
If so, is it possible to clear that cache, or whatever data it have stored, and force the phone to get a new (but the same) location?
Thanks in advance,
Eran.

Have you tried re-booting the phone, just so to remove any cache files which might be storing the location?

Since NETWORK_PROVIDER use cell location, wifi ssid and their signal strength to get your GPS coordinates.
Since you are in flight mode and cannot get cell location, just try to switch the connected wifi , maybe google service will be invoked to get new location.