Navigate back to the previous view

More than an issue it is a doubt. Maybe it's too obvious, but I didn't get it right. I did a couple of tries to come back to the previous view, like:

```
ConceptRouter.get().back(context);
```
or
```
((StartActivity) context).onBackPressed();
```
or
```
ConceptRouter.get().routeTo(context, new Route(StartRoute.class, new Bundle()));
```
but I don't want to create a new view, I want to retrieve the one already exists.

By the way, also I put this in my activity
```
@Override
public void onBackPressed() {
if (!ConceptRouter.get().back(this))
super.onBackPressed();
}
```
But I don't know why, even when there is a view history, always goes into the if.

Can you help me?
Thxs.