Android Question StopService

[pgargom]

hi¡
im an error when i try to stop a service.

my code is the next.

If IsPaused(Main)=False Then
        Log("llamamos a reinicio de tarjeta del main")
        CallSubDelayed3(Main,"reiniciarTarjetasSensores",callActivity,event)
    End If

the code of "reiniciarTarjetas sensores" is:

Sub reiniciarTarjetasSensores(callActivity As Object,event As String)
    usbDevices.CloseUSBSensorDevices
    usbDevices.ConnectUSBSensorDevices(callActivity,event)
End Sub

more code:

Sub CloseUSBSensorDevices
    Try
    StopService(usbServiceSensor)
    Catch
    End Try
End Sub

and connectUSBsensorDevices start service another time.

the error that i have is the next:

** Service (usbservicesensor) Destroy **
usbservicesensor_service_destroy (java line: 131)
java.lang.NullPointerException
    at b4aSlave.example.usbservicesensor._service_destroy(usbservicesensor.java:131)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:173)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:157)
    at b4aSlave.example.usbservicesensor.onDestroy(usbservicesensor.java:82)
    at android.app.ActivityThread.handleStopService(ActivityThread.java:2389)
    at android.app.ActivityThread.access$2000(ActivityThread.java:123)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1213)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4424)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
    at dalvik.system.NativeStart.main(Native Method)
java.lang.RuntimeException: Unable to stop service b4aSlave.example.usbservicesensor@410b7308: java.lang.RuntimeException: java.lang.NullPointerException
    at android.app.ActivityThread.handleStopService(ActivityThread.java:2406)
    at android.app.ActivityThread.access$2000(ActivityThread.java:123)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1213)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4424)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:199)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:157)
    at b4aSlave.example.usbservicesensor.onDestroy(usbservicesensor.java:82)
    at android.app.ActivityThread.handleStopService(ActivityThread.java:2389)
    ... 10 more
Caused by: java.lang.NullPointerException
    at b4aSlave.example.usbservicesensor._service_destroy(usbservicesensor.java:131)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:173)
    ... 13 more

 

[Erel]

The problem is in Service_Destroy. The Try / Catch block you added is not relevant as StopService sends a message to the message queue which is later processed.