我在这里使用flare_flutter软件包1.5.3和bloc进行状态管理 基本上，家庭小部件所做的是使用流生成器和计时器每10.0秒更改一次在屏幕上播放的照明弹演员 仅当首次渲染窗口小部件并且开始闪光动画会意外地切换黑白动画（但是应该每10.0秒发生一次）时才发生错误，而不是经过一段时间（大约30秒钟的渲染时间）后才出现错误，并且一切正常。 /> //首页小部件 类Home扩展了StatelessWidget {
final String heroName="assets/flare/TheArchitect.flr";
final String name="TheRefactorer";
final String status="xxx";
// bool userName async(value,banner){
// heroName=value;
// status=banner;
// return true;
// }
List drawer(){
List<Widget> flareList=[];
flareList.add(new DrawerHeader(
child: Text('List of Heroes available'),
decoration: BoxDecoration(
color: Colors.pink,
),
),);
List flareList1=_filesToWarmup;
flareList1.remove(heroName);
for(int i=0;i<flareList1.length;i++)
{
flareList.add(new ListTile(
trailing: Icon(Icons.arrow_right),
title:Text(flareList1[i].split("/")[2].split(".")[0]),
onTap: (){
print(flareList1[i]);
},
));
}
return flareList;
}
Timer homeHeroTimer=null;
Widget build(BuildContext context){
final bloc=Provider.of(context);
double width = MediaQuery.of(context).size.width;
double height = MediaQuery.of(context).size.height;
return Scaffold (
appBar: AppBar(
actions: <Widget>[
GestureDetector(
child: Icon(Icons.power_settings_new
),
onTap: (){
print("aaction for logout");
homeHeroTimer.cancel();
//bloc.disposeHomeTimer();
Navigator.of(context).pushReplacementNamed('/login');
},
)
],
backgroundColor: Colors.pink,
),
drawer:Drawer(
child: ListView(
children:drawer()
),
),
body:Center(
child: Container(
padding: EdgeInsets.fromLTRB(10.0,25.0,10.0,5.0),
child: StreamBuilder(
stream: bloc.homeTimer,
builder: (context,AsyncSnapshot<String> snapshot){
if(homeHeroTimer==null)
{
homeHeroTimer=Timer(Duration(seconds: 10),(){
print("10.0 seconds");
bloc.updateInitHome("update");
});
}
if(! homeHeroTimer.isActive) {homeHeroTimer=Timer(Duration(seconds: 10),(){
print("10.0 seconds");
bloc.updateInitHome("update");
});
}
else if(homeHeroTimer.isActive){
print("timer still running");
}
print(homeHeroTimer.isActive);
var random=new Random();
// print(snapshot.data);
String currHeroName=_filesToWarmup[random.nextInt(_filesToWarmup.length)];
return GestureDetector(
child: AnimatedContainer(
color: Colors.white,
duration: Duration( seconds: 4),
curve: Curves.easeIn,
child: Stack(
alignment: Alignment.center,
overflow: Overflow.visible,
children: <Widget>[
Container(
color: Colors.black,
),
Positioned(
bottom: 0.0,
child:Text(currHeroName.split("/")[2].split(".")[0],
style:new TextStyle(color: Colors.white, fontSize: 20.0,fontWeight:FontWeight.bold,letterSpacing: 5.0 ) ,
),
),
Positioned(
bottom: 50.0,
width: width/2+100.0,
height: height/2+245.0,
child:new FlareActor(currHeroName, fit:BoxFit.fill, animation:"idle"),
),
],
),
),
onDoubleTap: (){
print("doubletapped========================================================================");
homeHeroTimer.cancel();
bloc.updateInitHome("update");
print(homeHeroTimer.toString());
},
);
},
),
),
),
);
}
}
//Bloc file
class Bloc extends Object with Validator{
final _email=BehaviorSubject<String>();
final _password=BehaviorSubject<String>();
final _timeer=BehaviorSubject<String>();
final _homeTimer=BehaviorSubject<String>();
Stream<String> get email=>_email.stream.transform(validateEmail);
Stream<String> get password=>_password.stream.transform(validatePassword);
Stream<String> get timeer=>_timeer.stream.transform(validateTimer);
Stream<String> get homeTimer=>_homeTimer.stream.transform(validateHomeTimer);
Stream<bool> get submitStream=> Observable.combineLatest2(email,password,(e,p)=>true);
Function(String) get changeEmail=>_email.sink.add;
Function(String) get changePassword=>_password.sink.add;
Function(String) get updateInit=>_timeer.sink.add;
Function(String) get updateInitHome=>_homeTimer.sink.add;
String submitty(){
String username=_email.value;
String pass=_password.value;
String val="email is $username and password is $pass ";
print(val);
return val;
}
dispose(){
_email.close();
_password.close();
}
disposeTimer(){
_timeer.close();
}
disposeHomeTimer(){
_homeTimer.close();
}
}
class Validator {
final validateTimer=StreamTransformer<String,String>.fromHandlers(
handleData:(timer,sink){
if(timer=="update")
{
sink.add(timer);
}
else{
sink.close();
}
}
);
final validateHomeTimer=StreamTransformer<String,String>.fromHandlers(
handleData:(timer,sink){
if(timer=="update")
{
sink.add(timer);
}
else{
sink.close();
}
}
);