I'm trying to use Android Native Module on Flutter web(by WASM), and create Android module and imported on flutter app.
It works on Android app but not on browser.
android/app/src/main/kotlin/com/example/flutter_application_1/MainActivity.kt
package com.example.flutter_application_1
import kotlin.random.Random
import androidx.annotation.NonNull
import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugin.common.MethodChannel
class MainActivity: FlutterActivity() {
override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
super.configureFlutterEngine(flutterEngine)
MethodChannel(flutterEngine.dartExecutor.binaryMessenger, "example.com/channel").setMethodCallHandler {
call, result ->
if(call.method == "getRandomNumber") {
val rand = Random.nextInt(100)
result.success(rand)
}
else {
result.notImplemented()
}
}
}
}
lib/main.dart
import 'package:flutter/services.dart';
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
static const platform = MethodChannel('example.com/channel');
Future<void> _generateRandomNumber() async {
int random;
try {
random = await platform.invokeMethod('getRandomNumber');
} on PlatformException catch (e) {
random = 0;
}
setState(() {
_counter = random;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text(
'Kotlin generates the following number:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headlineLarge,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _generateRandomNumber,
tooltip: 'Generate',
child: const Icon(Icons.refresh),
),
);
}
}
On Browser, this error continuously occured, but not on mobile(on Android, but not tested on iOS)
I wonder that flutter WASM not yet supports the Native module importing.
