AnimationController animateTo method, always going back to start - flutter

Question

I am using AnimationController.animateTo method to jump my animation to specific points instantly.
When I pass parameter 'target' with a value of 0.0 to animateTo method, the resulting 'value' property of AnimationController is 0.0. If I pass a parameter 'target' to animateTo method with a value of 0.5, the resulting 'value' property of AnimationController still returns 0.0. I would expect the 'value' property to return 0.5.
void _onPlayButtonPressed() {
final cpm = ScopedModel.of<CpModel>(context);
if (cpm.started) {
cpm.stop();
_animController.stop();
var targetProgress = cpm.adjustedProgress;
_animController.animateTo(targetProgress , duration: Duration(seconds: 0));
} else {
_ranOnce = true;
cpm.start();
_animController.forward();
}
}

Answer 1

I got late to answer that but will be helpful for other developers.
Add your animation controller onto the Animation object and use that animation object.
Like this:
The following example shows how you can use AnimationController's toAnimate method:
class Example extends StatefulWidget {
const Example({Key? key}) : super(key: key);
#override[![demo][1]][1]
State<Example> createState() => _ExampleState();
}
class _ExampleState extends State<Example> with TickerProviderStateMixin {
late Animation<double> slideAnimation;
late AnimationController sliderAnimationController;
#override
void initState() {
sliderAnimationController = AnimationController(
vsync: this, duration: const Duration(milliseconds: 1000));
slideAnimation = Tween<double>(begin:0, end: 130).animate(CurvedAnimation(
parent: sliderAnimationController, curve: Curves.ease));
print( sliderAnimationController.value);
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(body: SizedBox(width: 130,height: 160,child: IntrinsicHeight(
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 10),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
InkWell(
onTap: () {
sliderAnimationController.animateTo(0.0);
},
child: Padding(
padding: const EdgeInsets.all(6.0),
child: Text(
"Text1",
style: Theme.of(context)
.textTheme
.bodyText1!
.copyWith(
color: Colors.black,
fontWeight: FontWeight.w600),
),
),
),
12.verticalSpace,
InkWell(
onTap: () {
// sliderAnimationController.forward();
sliderAnimationController.animateTo(0.215);
},
child: Padding(
padding: const EdgeInsets.all(6.0),
child: Text(
"Text2",
style: Theme.of(context)
.textTheme
.subtitle1!
.copyWith(color: Colors.black),
),
),
),
12.verticalSpace,
InkWell(
onTap: () {
sliderAnimationController.animateTo(0.405);
}
,
child: Padding(
padding: const EdgeInsets.all(6.0),
child: Text(
"Text3",
style: Theme.of(context)
.textTheme
.subtitle1!
.copyWith(color: Colors.black),
),
),
),
12.verticalSpace,
InkWell(
onTap: () {
sliderAnimationController.animateTo(1.0);
},
child: Padding(
padding: const EdgeInsets.all(6.0),
child: Text(
"Text4",
style: Theme.of(context)
.textTheme
.subtitle1!
.copyWith(color: Colors.black),
),
),
)
],
),
),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 10),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
AnimatedBuilder(
animation: sliderAnimationController,
builder: (BuildContext context, Widget? child) {
return Transform.translate(offset: Offset(0, slideAnimation.value),
child: child);
},
child: Container(
width: 3,
height: 26,
color: Colors.blue,
),
),
Container(
width: 1,
color: Colors.black54,
)
],
),
),
],
),
),
),));
}
#override
void dispose() {
sliderAnimationController.dispose();
super.dispose();
}
}