How to animate ListView rendering in flutter? - flutter

Question

Okay so there are a couple of questions already asked regarding this but no one is doing what I want to do.
Context :
I've a bloc which maintains a stateCounter. Now whenever user visits the onboarding page, they are shown three different subpages (not exactly pages but 3 different content items). i.e.,
stateCounter == 1 | Fetch image from map at index = stateCounter + Fetch title from map at index = stateCounter + Fetch subtitle from map at index = stateCounter
When user clicks Next button, stateCounter increases and the Map's next child is shown which re-renders my page (to move to the next item).
I'm also using a Dismissble widget on each child so rendered, so that user can also increase the stateCounter when he/she drags from end to start (to achieve a sliding effect)
Now everything works like a charm but the only problem here is that when the next data is rendered (when stateCounter increases and we fetch the next series of image, title and subtitle), the change is not so subtle.
Here, I would want to show some kind of animation so that It looks good to the user. How can i do that ??
Here is the ListView that gets rendered on the screen based on stateCounter value:
ListView onBoardingSubscreens(stateCounter, context, bloc, controller) {
return ListView(
children: [
skipBtn(context, bloc),
renderImage(stateCounter, 0, context),
const SpaceRenderer(
heightFactor: 3,
),
renderScroller(stateCounter, 1, context),
const SpaceRenderer(
heightFactor: 3,
),
titleText(context, stateCounter),
const SpaceRenderer(
heightFactor: 2,
),
captionText(stateCounter),
Timer(
controller: controller,
secondsRemaining: 6,
onFinished: () {
stateChangeLogic(stateCounter, context, bloc, controller);
controller.restart();
},
),
],
);
}
As I mentioned above, this is rendered inside : ConstrainedBox which is rendered inside a Dismissible and a Column in the end.
Kindly help. I already tried using AnimatedContainer etc. but no animations are being shown. I'm open to using a package (if needed)