Cell Tower CellID

[larrytango]

Hello , im wishing to make an app that will do things based on what cell tower im connected to , is it possible using b4a to get the current cellid?

 

[Erel]

Have you checked ABWifi library?

 

[larrytango]

Have you checked ABWifi library?

I actually would like the cellID number, rather than location. i cant see how i could get that using the ABWifi library, is this possible??

 

[bluedude]

Yeah, I need this too. Would be good to have access to more pure internal Phone stuff.

 

[agraham]

You should be able to do it quite simply with my Reflection library. Something like this though I haven't actually tried it. CellId and Lac only exist for GSM networks.

Dim Obj1 As Reflector
Dim cid, lac As Int
Obj1.Target = Obj1.GetContext
Obj1.Target = Obj1.RunMethod2("getSystemService", "phone", "java.lang.String")
Obj1.Target = Obj1.RunMethod("getCellLocation") ' get a GsmCellLocation 
cid = Obj1.RunMethod("getCid") ' gsm cell id
lac = Obj1.RunMethod("getLac") ' gsm location area code

 

[bluedude]

No luck, NullPointException.

 

[agraham]

Where? I've just tried and it works fine on my ZTE Blade. I had to add a GPS object to get the right permission in the manifest otherwise I got a security exception.

You are on a GSM network and have the radio on and connected?

 

[bluedude]

Works on my Nexus One, had to add a GPS object. Now going to see if I can get the signalstrength.

 

[spillermarco]

Hello, the example above works, I would like to know where the library is Android "phone", I see only telephony; telephony.gsm; telephony.cdma.
Also because it uses "getCellLocation" to get GsmCellLocation?

why can not I get the example "getPsc" (with phone in CDMA mode)?

how i can use reflect with this :

http://developer.android.com/reference/android/telephony/SignalStrength.html

thanks

Regards

MArco

 

[agraham]

"Phone" is not an Android library, it is the Android constant Context.TELEPHONY_SERVICE used to obtain an instance of TelephonyManager.

I've already told you in this thread that you need a to register a PhoneStateListener to get signal strength. For that you will need a library as you can't do it with a Reflector object.

The getPsc method does not exist for CdmaCellLocation.

 

[bluedude]

CellId

Agraham,

it worked but now with GPS added I get the same exception error again. Any suggestions?

Cheers,

 

[agraham]

None I'm afraid. If it worked before it should keep on working.

 

[bluedude]

Lac

None I'm afraid. If it worked before it should keep on
working.

Any idea which exact permissions it needs?

The only thing that changes is that I now run B4A 6.

 

[agraham]

Check your unfiltered log to see what is there when the error occurs. Post the code that doesn't work and the exact text of the exception. We can't work without data.

 

[bluedude]

getCid

Hi,

This is the code i use:

Sub Activity_Create(FirstTime As Boolean)

Dim Obj1 As Reflector
Dim cid, lac As Int
Obj1.Target = Obj1.GetContext
Obj1.Target = Obj1.RunMethod2("getSystemService", "phone", "java.lang.String")
Obj1.Target = Obj1.RunMethod("getCellLocation") ' get a GsmCellLocation
cid = Obj1.RunMethod("getCid") ' gsm cell id
lac = Obj1.RunMethod("getLac") ' gsm location area code
Msgbox (cid,"GSM")

End Sub

It seems to crash on getCid.

java.lang.NullPointerException
at anywheresoftware.b4a.agraham.reflection.Reflection.runmethod(Reflection.java:160)
at anywheresoftware.b4a.agraham.reflection.Reflection.RunMethod(Reflection.java:749)
at nl.openhanced.cellid.main._activity_create(main.java:223)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:105)
at nl.openhanced.cellid.main.afterFirstLayout(main.java:84)
at nl.openhanced.cellid.main.access$100(main.java:16)
at nl.openhanced.cellid.main$WaitForLayout.run(main.java:72)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3683)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
java.lang.NullPointerException

 

[bluejay]

Also make sure you are currently on a gsm network eg

nt = ph.GetNetworkType
Select nt
Case "EDGE", "GPRS", "HSDPA", "HSPA", "HSUPA", "UMTS"
Obj1.Target = Obj1.GetContext
Obj1.Target = Obj1.RunMethod2("getSystemService", "phone", "java.lang.String")
Obj1.Target = Obj1.RunMethod("getCellLocation") ' get a GsmCellLocation
cid = Obj1.RunMethod("getCid") ' gsm cell id
lac = Obj1.RunMethod("getLac") ' gsm location area code
End Select

bluejay

 

[bluedude]

Bluejay,

Is ph.GetNetworkType the Phone library?

 

[bluejay]

Yes it uses the Phone library.

Dim ph as Phone

Bluejay

 

[bluedude]

Works, for some reason there wasn't a signal and that was the cause of the error.

 

[Roadrunner]

Vendor-RIL?

Is it possible to talk directly to the vendor-RIL (Radio Interface Layer)?
I need to send commands to them and also need to get responses.