Categories: Symbian C++ | Bluetooth | Code Examples

This page was last modified 04:17, 22 May 2007.

From Forum Nokia Wiki

#include <centralrepository.h> // for CRepository
#include <BTServerSDKCRKeys.h> // for KCRUidBluetoothPowerState, KBTPowerState
#include <BtnotifierAPI.h> // for KPowerModeSettingNotifierUid
 
// ----------------------------------------------------------------------------
// CBTEngine::CheckBluetoothPowerStateL()
// This will check the Bluetooth power state and if switched off then ask
// to switch it on.
// ----------------------------------------------------------------------------
//
TBool CBTEngine::CheckBluetoothPowerStateL()
    {
    if(BluetoothPowerStateL())
        {
        return ETrue;
        }
    else
        {
        return TurnBluetoothOnL();
        }
    }
 
// ----------------------------------------------------------------------------
// CBTEngine::BluetoothPowerStateL()
// Get the Bluetooth power state of the device.
// ----------------------------------------------------------------------------
//
TBool CBTEngine::BluetoothPowerStateL()
    {
    CRepository* crep = CRepository::NewLC(KCRUidBluetoothPowerState);
    TInt value = 0;
    User::LeaveIfError(crep->Get(KBTPowerState, value));
    CleanupStack::PopAndDestroy(crep);
 
    return !(value == 0);
    }
 
// ----------------------------------------------------------------------------
// CBTEngine::TurnBluetoothOnL()
// Uses the Notifier API to ask the user to turn on Bluetooth
// if it's not on already.
// ----------------------------------------------------------------------------
//
TBool CBTEngine::TurnBluetoothOnL()
    {  
    RNotifier notifier;
    User::LeaveIfError( notifier.Connect() );
    TPckgBuf<TBool> dummy(ETrue);
    TPckgBuf<TBool> reply(EFalse);
    TRequestStatus status;
    notifier.StartNotifierAndGetResponse(status, 
        KPowerModeSettingNotifierUid, dummy, reply);
    User::WaitForRequest(status);
    notifier.CancelNotifier(KPowerModeSettingNotifierUid);
    notifier.Close();
 
    return reply();
    }

Related Links

• Check Bluetooth power on/off

Note: The code has been taken from BTFileSend, an open source project in SourceForge.net.