//判断蓝牙是否打开的函数
TBool CMessageClient::GetBluetoothOn()
{
  // Create and initialise an RHostResolver
   RHostResolver hr;
   TInt res = false;
   TBool ret;
  
   RSocketServ socketServer;
   User::LeaveIfError(socketServer.Connect());        
   CleanupClosePushL(socketServer);
  
   res =  hr.Open(socketServer, KBTAddrFamily, KBTLinkManager);
  
   if (KErrNone != res) {
      // if not success, this means bluetooth is not on
      ret = EFalse;
   }
  
   else
   {
      ret = ETrue; // Bluetooth is already ON
      hr.Close();
   }
  
   CleanupStack::PopAndDestroy(1); 
  
   return ret;
}

//打开蓝牙的函数
void CMessageClient::ProcessBTPowerON()
{
 TPckgBuf<TBool> pckg;
 RNotifier iNotifier;
 TPckgBuf<TBool> iNotifierResult;
 TRequestStatus status;

 User::LeaveIfError(iNotifier.Connect());
 iNotifier.StartNotifierAndGetResponse(status,KPowerModeSettingNotifierUid,pckg,iNotifierResult);
 User::WaitForRequest(status);
 User::LeaveIfError(status.Int());

 iNotifier.CancelNotifier(KPowerModeSettingNotifierUid);
 iNotifier.Close();
 User::LeaveIfError(iNotifierResult[0]);
}