Android Question BleManager2 issue

[NeoTechni]

starter_readdata (java line: 305)
java.lang.RuntimeException: Service not found
at anywheresoftware.b4a.objects.BleManager2.getService(BleManager2.java:260)
at anywheresoftware.b4a.objects.BleManager2.readableCharsFromService(BleManager2.java:243)
at anywheresoftware.b4a.objects.BleManager2.ReadData2(BleManager2.java:194)
at anywheresoftware.b4a.objects.BleManager2.ReadData(BleManager2.java:186)
at b4a.example.starter._readdata(starter.java:305)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:897)
at anywheresoftware.b4a.keywords.Common.CallSubNew(Common.java:831)
at b4a.example.main._polldata(main.java:1138)
at b4a.example.main._sectimer_tick(main.java:1261)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
at anywheresoftware.b4a.objects.Timer$TickTack.run(Timer.java:105)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6938)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)

Any thoughts?

 

[NeoTechni]

I tried encapsulating the code in try/catch but it is still crashing.

Try
       manager.ReadData(KeyStart & 0 & KeyEnd)
       WaitingForData=True
     Catch
       WaitingForData=False
     End Try

 

[NeoTechni]

I've double checked and I'm using the right service IDs, as they work one time on the device, but sometimes not the next.

 

[Erel]

Moved to the questions forum.

What is the output of Log(KeyStart & 0 & KeyEnd) ?

 

[NeoTechni]

Public KeyStart As String = "a495ff2", KeyEnd As String = "-c5b1-4b44-b512-1370f02d74de"

 

[Erel]

Based on the error there is no such service. Did you check the available services in the Connected event?

 

[NeoTechni]

There is, as it's a dedicated service for that device for a specific feature, and it's been detecting it fine up till a random point. But is there a way to gracefully fail though? try/catch didn't work.

 

[Erel]

You should only access services that are listed in the Connected event. Check whether this specific service is listed or not and do not call it if it doesn't.

 

[NeoTechni]

It is listed though. It's failing randomly.

 

[Erel]

Recheck your code. The services are discovered once during connection and then the same list of services is used each time.

If you want to catch this error then you can use this code:

Dim jo As JavaObject = manager
Try 
jo.RunMethod("getService", Array(<your service>))
 Manager.ReadData(...)
Catch
 Log("Service not found.")
 End Try

Note that the service id is case sensitive.