| lee

Android工程集成flutter

官方方案

https://github.com/flutter/flutter/wiki/Add-Flutter-to-existing-apps

第一个步：
新建一个标准的APP工程testFlutterInAPP，APP目录下面通过命令创建flutter模块工程

flutter create -t module my_flutter

编译flutter 代码生成Android的AAR文件

$ cd .android/
$ ./gradlew flutter:assembleDebug

AAR 文件生成到.android/Flutter/build/outputs/aar/目录下面

添加Host APP 依赖flutter module 模块，在setting.gradle 文件中加入

include ':app'                                     // assumed existing content
setBinding(new Binding([gradle: this]))                                 // new
evaluate(new File(                                                      // new
  settingsDir.parentFile,                                               // new
  'my_flutter/.android/include_flutter.groovy'                          // new
))

app/build.gradle 增加对flutter 工程依赖

// testFlutterInAPP/app/build.gradle

dependencies {
  implementation project(':flutter')
}

构建成功后，执行Android的run启动应用 ,点击打开flutter 。

Java 层代码

 openFlutter.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                View flutterView = Flutter.createView(
                        MainActivity.this,
                        getLifecycle(),
                        "route1"
                );
                FrameLayout.LayoutParams layout = new FrameLayout.LayoutParams(600, 800);
                layout.leftMargin = 100;
                layout.topMargin = 200;
                addContentView(flutterView, layout);
            }
        });
```       
flutter 代码

import ‘dart:ui’;

import ‘package:flutter/material.dart’;

void main() => runApp(_widgetForRoute(window.defaultRouteName));

Widget _widgetForRoute(String route) {
switch (route) {
case ‘route1’:
return new MyApp();
case ‘route2’:
return new MyApp();
default:
return Center(
child: Text(‘Unknown route1 : $route’, textDirection: TextDirection.ltr),
);
}
return new MyApp();
}

class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: ‘Flutter Demo’,
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: ‘Flutter Demo 1111’
‘Home Page’),
);
}
}

class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);

final String title;

@override
_MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State {
int _counter = 0;

void _incrementCounter() {
setState(() {
_counter++;
});
}

@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(

    title: new Text(widget.title),
  ),
  body: new Center(

      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        new Text(
          'You have pushed the button this many times:',
        ),
        new Text(
          '$_counter',
          style: Theme.of(context).textTheme.display1,
        ),
      ],
    ),
  ),
  floatingActionButton: new FloatingActionButton(
    onPressed: _incrementCounter,
    tooltip: 'Increment',
    child: new Icon(Icons.add),
  ), // This trailing comma makes auto-formatting nicer for build methods.
);

}
}
`
运行 flutter 工程，进入my_flutter 目录执行flutter run 命令