StepperView.dart

int currentStep = 0;
  List<Step> spr = <Step>[];
  List<Step> _getSteps() {
    spr = <Step>[
      Step(
        state: _getState(1),
        title: Text("Step 1"),
        content: new Wrap(
          children:<Widget>[
            StepOneView()
          ],
        ),
        isActive: (currentStep == 0 ? true : false)
      ),
      Step(
        title: Text("Step 2"),
        content: new Wrap(
          children:<Widget>[
            StepTwoView()
            ],
        ),
        isActive: (currentStep == 1 ? true : false),
        state: _getState(2),
      )
    ];
    return spr;
  }

  StepState _getState(int i) {
    if (currentStep >= i)
      return StepState.complete;
    else
      return StepState.indexed;
  }