run time error di pratik navigator IV

[sandi]

ini error nya coach

PS C:\Users\lenovo\Documents\my works\flutter\praktik_navigator_part1_itbox> flutter run
Launching lib\main.dart on SM A013G in debug mode…
Invalid depfile: C:\Users\lenovo\Documents\my works\flutter\praktik_navigator_part1_itbox\.dart_tool\flutter_build\cc1ba05e443b4da0d102ea8df13f858f\kernel_snapshot.d
Invalid depfile: C:\Users\lenovo\Documents\my works\flutter\praktik_navigator_part1_itbox\.dart_tool\flutter_build\cc1ba05e443b4da0d102ea8df13f858f\kernel_snapshot.d
lib/main.dart:1:8: Error: Not found: ‘dart:js’
import ‘dart:js’;
^
lib/screen0.dart:1:8: Error: Not found: ‘dart:html’
import ‘dart:html’;
^
Unhandled exception:
FileSystemException(uri=org-dartlang-untranslatable-uri:dart%3Ajs; message=StandardFileSystem only supports file:* and data:* URIs)
#0 StandardFileSystem.entityForUri (package:front_end/src/api_prototype/standard_file_system.dart:34:7)
#1 asFileUri (package:vm/kernel_front_end.dart:623:37)
#2 writeDepfile (package:vm/kernel_front_end.dart:763:21)
<asynchronous suspension>
#3 FrontendCompiler.compile (package:frontend_server/frontend_server.dart:586:9)
<asynchronous suspension>
#4 starter (package:flutter_frontend_server/server.dart:85:12)
<asynchronous suspension>
#5 main (file:///C:/b/s/w/ir/cache/builder/src/flutter/flutter_frontend_server/bin/starter.dart:13:24)
<asynchronous suspension>

FAILURE: Build failed with an exception.

* Where:
Script ‘C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle’ line: 1102

* What went wrong:
Execution failed for task ‘:app:compileFlutterBuildDebug’.
> Process ‘command ‘C:\src\flutter\bin\flutter.bat” finished with non-zero exit value 1

* Try:
Run with –stacktrace option to get the stack trace. Run with –info or –debug option to get more log output. Run with –scan to get full
insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 35s
Running Gradle task ‘assembleDebug’… 37.0s
Exception: Gradle task assembleDebug failed with exit code 1

[sandi]

ini kodingan main.dart nya

import ‘dart:js’;
import ‘package:flutter/material.dart’;
import ‘./screen1.dart’;
import ‘screen2.dart’;
import ‘screen0.dart’;

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
//home: Screen0(),
initialRoute: “/”,
routes: {
“/”: (context) => Screen0(),
“/first”: (context) => Screen1(),
“/second”: (context) => Screen2(),
},
);
}
}

[sandi]

ini screen0.dart

import ‘dart:html’;

import ‘package:flutter/material.dart’;
import ‘screen1.dart’;
import ‘screen2.dart’;

class Screen0 extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
appBar: AppBar(
flexibleSpace: Container(
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [Colors.amber, Colors.amberAccent],
begin: FractionalOffset.topLeft,
end: FractionalOffset.bottomRight),
)),
title: Text(“screen 0”),
),
body: Center(
child: Column(
children: [
ElevatedButton(
onPressed: () {},
child: Text(“Go To Screen 1”),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(Colors.amber)),
),
ElevatedButton(
onPressed: () {},
child: Text(“Go To Screen 2 “),
style: ButtonStyle(
backgroundColor:
MaterialStateProperty.all(Colors.amberAccent)),
)
],
),
),
),
);
}
}

[sandi]

ini screen1.dart

import ‘package:flutter/material.dart’;
import ‘package:praktik_navigator_part1_itbox/screen2.dart’;
import ‘screen2.dart’;

class Screen1 extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.red,
title: Text(“Screen 1”),
),
body: Center(
child: ElevatedButton(
onPressed: () {
Navigator.push(context, MaterialPageRoute(builder: (context) {
return Screen2();
}));
},
child: Text(“Go to Screen 2”),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(Colors.red),
),
),
),
);
}
}

[sandi]

ini screen2.dart

import ‘package:flutter/material.dart’;
import ‘screen1.dart’;

class Screen2 extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
appBar: AppBar(
flexibleSpace: Container(
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [Colors.blue, Colors.purple],
begin: FractionalOffset.topCenter,
end: FractionalOffset.bottomCenter)),
),
title: Text(“Screen 2”),
),
body: Center(
child: ElevatedButton(
onPressed: () {
Navigator.pop(context);
{
return Screen1();
}
;
},
child: Text(“Back to screen 1”),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(Colors.purple),
),
),
),
),
);
}
}

mohon batuanya coach salah saya sebelah mana …terima kasih coach

[Anonymous]

Hi Sandi,
Dilihat dari errornya

lib/main.dart:1:8: Error: Not found: ‘dart:js’
import ‘dart:js’;
^
lib/screen0.dart:1:8: Error: Not found: ‘dart:html’
import ‘dart:html’;
^

sepertinya kamu tidak sengaja mengimport package “dart:html” dan “dart:js”.
Jadi silahkan hapus aja import kedua package tersebut dari file main.dart dan screen0.dart

Btw, alasan error ini terjadi karena kamu ngejalanin code kamu di device mobile(android) sedangkan package tersebut hanya bisa digunakan untuk aplikasi web dan tidak compatible dengan aplikasi android.

[Author]

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