我正在尝试在Flutter中构建一个SDK,本地应用可以使用该SDK调用带参数的flutter方法。
我在data returned之后构建了Flutter模块。
我在this之后添加了Flutter屏幕
Android本机代码
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import io.flutter.embedding.android.FlutterActivity
import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel
import kotlinx.android.synthetic.main.activity_main.*
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
/****************** Launching Flutter activity *************/
button.setOnClickListener {
val flutterEngine = FlutterActivity.withNewEngine()
startActivity(
flutterEngine
.initialRoute("/")
.build(this)
)
}
login.setOnClickListener {
// Want to do this
// channel?.invokeFlutterMethod("login", "username", "password");
}
}
}
颤振代码
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
static const channel = const
MethodChannel('sample.flutter.sdk/apis');
@override
void initState() {
channel.setMethodCallHandler((call) {
switch(call.method) {
case "login": {
// Call Login API and return the result to
// android activity
}
}
return;
});
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'Login',
style:
Theme.of(context).textTheme.headline4,
),
],
),
),
);
}
}
我无法在此处建立MethodChannel,FlutterActivity.withNewEngine
没有dartExecutor
。
MethodChannel(flutterEngine.dartExecutor.binaryMessenger,
CHANNEL).setMethodCallHandler {
call, result ->
// Note: this method is invoked on the main thread.
// TODO
}
还有其他方法可以创建MethodChannels吗?