I am trying to implement shared_axis_transition on my flutter application's bottom navigation. The setup consists of A root page with bottom navigation bar and 4 other pages which changes according to the index of bottom navigation. The problem is, each of the widgets are stateful and have their own initstate. When I try to apply animation, after animation completes, the widget rebuilds itself and sort of flickering effect is seen. How do I solve the issue? My code pattern is as follow:
RootWidget{
body: PageTransitionSwitcher(
duration: const Duration(milliseconds: 300),
transitionBuilder: (
Widget child,
Animation<double> animation,
Animation<double> secondaryAnimation,
) {
return SharedAxisTransition(
child: child,
animation: animation,
secondaryAnimation: secondaryAnimation,
transitionType: _transitionType,
);
},
child: [First(),Second(),Third(),Fourth()].elementAt[index],
),
),
bottomNavigationBar(),
}
Each of the widget have their own initstate which I believe is causing this.
p.s For the first time since I started flutter, animations in debug environment looks smoother than animation in release...
Related
I am making a carousel with cross fade animation which I am using AnimatedSwitcher with FadeTransition to achieve such effect. The effect is fine but I want the carousel to be swipeable. I had tried PageView but I do not want the slide animation. Does anyone have any solution to this? Please Help. Thanks in advance.
The custom carousel I currently use.
AnimatedSwitcher(
duration: const Duration(milliseconds: 500),
transitionBuilder: (Widget child, Animation<double> animation) {
return FadeTransition(child: child, opacity: animation);
},
child: Image.asset(
imageList[currentIndex.toInt()],
key: ValueKey<int>(currentIndex),
),
If you do not want slide animation, do not use PageView.
Stick with your current implementation with AnimationSwitcher. If you want to add gesture support, wrap it with GestureDetector and listen on the onHorizontalDrag... or onVerticalDrag... events.
Flutter. There are two screens. On the first screen, there is one widget in the center (a container with text). On the second screen (ListView), the same (container with text), but shifted to the side, and another one is added(TextField). How do I animate the transition between these screens? Move the first widget (container) I know how. But how do I add a TextField at the same time ? ......as an option, I thought to apply the opacity of the TextField , but this place on the first screen is already occupied. Probably a complete replacement of the screens is needed here.
Here you have example of quick animation. This code should be in onpressed
Navigator.push(
context,
PageRouteBuilder(
transitionsBuilder: (BuildContext context,
Animation<double> animation,
Animation<double> secAnimation,
Widget child) {
animation = CurvedAnimation(
parent: animation,
curve: Curves.fastLinearToSlowEaseIn);
return ScaleTransition(
scale: animation,
child: child,
alignment: Alignment.center,
);
},
transitionDuration:
const Duration(milliseconds: 300),
pageBuilder: (BuildContext context,
Animation<double> animation,
Animation<double> secAnimation) {
return **urpage**();
}));
I want to make a custom transition like PageView in flutter when navigate to another page like image below but I do not know how. I used SlideTransitiondid but it does not give me the desired result
import 'package:flutter/material.dart';
import 'package:get/get.dart';
class SlideTransitions extends CustomTransition {
#override
Widget buildTransition(
BuildContext context,
Curve curve,
Alignment alignment,
Animation<double> animation,
Animation<double> secondaryAnimation,
Widget child) {
return Align(
alignment: Alignment.center,
child: SlideTransition(
position: Tween(begin: Offset(1.0, 0.0), end: Offset(0.0, 0.0))
.animate(animation),
child: child,
),
);
}
}
pageview transition image
you can use page_transition PageTransitionType.rightToLeft . It's kinda similar to pageview swipe
I have a sliver animated sliver list where each item is generated with the following function:
Widget _buildIntroItem(BuildContext context, AnimatedChatState state, int index, Animation<double> animation) {
return FadeTransition(
opacity: animation,
child: SizeTransition(
axis: Axis.vertical,
sizeFactor: animation,
child: _buildIntroCard(context, state.messageList[index])
),
);
}
When the items animate in the list, they increase in size and opacity at the same time. How can I stagger the transition so that they increase in size, then increase in opacity?
I'm trying to customize a showGeneralDialog to show my Transform.scale animation. I'm just wondering if there is a way to change the default animation of the widget to a curved animation?
like a1 and a2 within:
transitionBuilder: (context, a1, a2, widget) {
For example, I would like the Transform.scale to have a bounceIn effect.
Also, could someone please explain the difference between transitionBuilder: (context, a1, a2, widget) {} and pageBuilder: (context, animation1, animation2) {} for the showGeneralDialog widget? And how do I properly use them?
Thanks!
Yes it is possible by override transitionBuilder parameter.
1. Creating New showDialog() method
Commonly, developer uses showDialog to put some dialog that overlays underlying
screen.
In this app, it is convenient to have new method so it can be simply reused
through out our application.
new_dialog.dart
Future<T> showNewDialog<T>(
return showGeneralDialog(
...
transitionDuration: const Duration(milliseconds: 400),
transitionBuilder: _buildNewTransition,
);
}
We only reuse showGeneralDialog() method, and customized its animation-related
parameters : its transitionDuration for Duration and its transitionBuilder
as Animating component.
2. Defining new Animating component
In this demo we create simple animation by wrapping our child widget into
ScaleTransition. Then we defined its curve, rather in curve param only, or
in both of curve and reverseCurve.
new_dialog.dart
Widget _buildNewTransition(
BuildContext context,
Animation<double> animation,
Animation<double> secondaryAnimation,
Widget child,
) {
return ScaleTransition(
scale: CurvedAnimation(
parent: animation,
curve: Curves.bounceIn,
reverseCurve: Curves.bounceIn,
),
child: child,
);
}
3. Display our new Dialog
Lastly, we can call this animated dialog anywhere in our app by using this
code :
main.dart
RaisedButton.icon(
icon: Icon(Icons.info_outline),
label: Text("Open Dialog"),
onPressed: () {
showNewDialog(
context: context,
builder: (BuildContext context) {
return AlertDialog(
title: Text("Bounce In"),
);
},
);
},
),
Repository
you may look repository here. Github
Demo
pageBuilder vs Transition builder
If we take look into DialogRoute definition in Flutter Repo, we can conclude that
each showDialog() method will runs and passing parameters in this sequences :
showDialog
showGeneralDialog
_DialogRoute
PopupRoute
ModalRoute
and so on
...
Take look at buildTransitions method _DialogRoute which return FadeTransition by default.
As I tried, if we put transitionBuilder : null, by calling showGeneralDialog, The App will displays Dialog and still got animated.
return showGeneralDialog(
...,
transitionBuilder: null,
);
Conversely, if we put pageBuilder : null, by calling showGeneralDialog, The App will displays nothing.
return showGeneralDialog(
...,
pageBuilder: null,
transitionBuilder: _buildNewTransition,
);
We may conclude that :
pageBuilder although has some parameters of Animation and
SecondaryAnimation, it is meant for defining Widget to display.
transitionBuilder it is meant for defining animation to be
processed, as Flutter displaying the Dialog