Flutter tween basic animation is not working inside FutureBuilder
I have created a image gallery page using gridview.builder , but the animation doesnt works inside futurebuilder
for some reason. I tried same animation on an static image directly inside the container of the body and it worked perfectly fine.Need some way to animate network images inside futurebuilder.
class _GalleryGridState extends State<GalleryGrid>
with TickerProviderStateMixin {
AnimationController _controller;
Animation _squeezeOutAnimation, transformationAnim;
List<GalleryModel> lists = List();
Future<List<GalleryModel>> fetchPost() async {
final response =
await http.get("https://jsonplaceholder.typicode.com/photos");
if (response.statusCode == 200) {
var datas = json.decode(response.body);
lists = (datas as List)
.map((data) => new GalleryModel.fromJson(data))
.toList();
return lists;
} else {
throw Exception("Failed to load photos");
}
}
@override
void initState() {
super.initState();
_controller =
AnimationController(duration: Duration(seconds: 3), vsync: this);
transformationAnim = BorderRadiusTween(
begin: BorderRadius.circular(150.0),
end: BorderRadius.circular(0.0))
.animate(CurvedAnimation(parent: _controller, curve: Curves.ease));
_squeezeOutAnimation = Tween<double>(begin: 150.0, end: 1000.0)
.animate(CurvedAnimation(parent: _controller, curve: Curves.ease));
}
@override
void dispose() {
super.dispose();
_controller.dispose();
}
@override
Widget build(BuildContext context) {
return FutureBuilder(
future: fetchPost(),
builder: (context, data) {
switch (data.connectionState) {
case ConnectionState.waiting:
return Center(child: CircularProgressIndicator());
default:
return GridView.builder(
gridDelegate:
SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
itemCount: lists.length,
itemBuilder: (BuildContext context, int index) {
return Stack(
children: <Widget>[
Container(
child: Card(
shape: BeveledRectangleBorder(
borderRadius: transformationAnim.value),
elevation: 10.0,
child: GestureDetector(
onTap: () {
_controller.forward();
},
child: Container(
width: _squeezeOutAnimation.value,
height: _squeezeOutAnimation.value,
child: Image.network(
lists[index].thumbnailUrl,
fit: BoxFit.fill,
width: _squeezeOutAnimation.value,
),
),
),
),
),
])
The animation is running but your build widget is not updating i.e. rebuild
try this code if it works as you expected let me know.
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'dart:async';
import 'dart:convert';
void main() => runApp(GalleryGrid());
class GalleryGrid extends StatefulWidget {
@override
_GalleryGridState createState() => _GalleryGridState();
}
class GalleryModel {
final String thumbnailUrl;
GalleryModel(this.thumbnailUrl);
factory GalleryModel.fromJson(Map<String, dynamic> data) {
return GalleryModel(data['thumbnailUrl']);
}
}
class _GalleryGridState extends State<GalleryGrid>
{
List<GalleryModel> lists = List();
Future<List<GalleryModel>> fetchPost() async {
final response =
await http.get("https://jsonplaceholder.typicode.com/photos");
if (response.statusCode == 200) {
var datas = json.decode(response.body);
lists = (datas as List)
.map((data) => new GalleryModel.fromJson(data))
.toList();
return lists;
} else {
throw Exception("Failed to load photos");
}
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: FutureBuilder(
future: fetchPost(),
builder: (context, data) {
switch (data.connectionState) {
case ConnectionState.waiting:
return Center(child: CircularProgressIndicator());
default:
return new GridWidget(lists: lists);
}
},
),
),
);
//),
//);
}
}
class GridWidget extends StatefulWidget {
const GridWidget({
Key key,
@required this.lists,
}) ;
final List<GalleryModel> lists;
@override
GridWidgetState createState() {
return new GridWidgetState();
}
}
class GridWidgetState extends State<GridWidget> with TickerProviderStateMixin{
AnimationController _controller;
Animation _squeezeOutAnimation, transformationAnim;
@override
void initState() {
super.initState();
_controller =
AnimationController(duration: Duration(seconds: 3), vsync: this);
transformationAnim = BorderRadiusTween(
begin: BorderRadius.circular(150.0),
end: BorderRadius.circular(0.0))
.animate(CurvedAnimation(parent: _controller, curve: Curves.ease))
..addListener(() {
setState(() {});
});
_squeezeOutAnimation = Tween<double>(begin: 150.0, end: 1000.0)
.animate(CurvedAnimation(parent: _controller, curve: Curves.ease));
}
@override
void dispose() {
super.dispose();
_controller.dispose();
}
@override
Widget build(BuildContext context) {
return GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2),
itemCount: widget.lists.length,
itemBuilder: (BuildContext context, int index) {
return Stack(children: <Widget>[
Container(
child: Card(
shape: BeveledRectangleBorder(
borderRadius: transformationAnim.value),
elevation: 10.0,
child: GestureDetector(
onTap: () {
print('Card $index is pressed');
_controller.reset();
_controller.forward();
},
child: Container(
width: _squeezeOutAnimation.value,
height: _squeezeOutAnimation.value,
child: Image.network(
widget.lists[index].thumbnailUrl,
fit: BoxFit.fill,
width: _squeezeOutAnimation.value,
),
),
),
),
),
]);
},
);
}
}