話不多說(shuō)，拿起鍵盤就是干！Ctrl+C & Ctrl+V

使用As導(dǎo)入FlutterModule項(xiàng)目，選擇菜單欄的 File -> New Module -> Import Flutter Module , 導(dǎo)入成功后，項(xiàng)目中的兩個(gè)gradle文件會(huì)被修改。一個(gè)是 settings.gradle 和 app/build.gradle , 修改的內(nèi)容分別如下：
settings.gradle, 最后會(huì)添加這樣一段話 :

setBinding(new Binding([gradle: this]))
evaluate(new File(
  settingsDir.parentFile,
  '../flutter/each_family/.android/include_flutter.groovy'
))

app/build.gradle中的依賴會(huì)在第一排添加：

dependencies {
    implementation project(':flutter')  //這是導(dǎo)入的Flutter的東西
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:27.+'
    .... //此處省略N多
}

由于 libflutter.so 的問(wèn)題，或者說(shuō)是安卓編譯架構(gòu)的問(wèn)題，在編譯運(yùn)行后打開(kāi)flutter顯示的那個(gè)頁(yè)面可能會(huì)出現(xiàn) couldn't find libflutter.so 的問(wèn)題，解決辦法是只使用 armeabi-v7a, 具體配置是修改 app/build.gradle 文檔，如下：

android{
    defaultConfig{
        ndk {
            abiFilters "armeabi-v7a", "x86"
       }
    }
    buildTypes {
          debug {
              ndk {
                abiFilters "armeabi-v7a", "x86"
              }
          }
          release {
              ndk {
                 abiFilters "armeabi-v7a"
              }   
         }
    }
}

按照以上配置，就不會(huì)出現(xiàn)so庫(kù)找不到的問(wèn)題了！

demo示例

原生代碼 - kotlin

class FlutterPresenterActivity : AppCompatActivity() {

    companion object {

        /** 通訊頻道名稱 **/
        private const val ChannelName = "com.demo.flutter/activity"

    }

    private var methodChannel: MethodChannel? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        with(initActivityUI()) {  //初始化ActivityUI
            initMethodChannel(this) //初始化MethodChannel
            ToastPlugin.register(this@FlutterPresenterActivity, this) //注冊(cè)Toast插件
        }
    }

    /** 初始化ActivityUI **/
    private fun initActivityUI(): FlutterView {
        window.requestFeature(Window.FEATURE_NO_TITLE)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
                    or WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
            window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or View.SYSTEM_UI_FLAG_LAYOUT_STABLE
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
            window.statusBarColor = Color.TRANSPARENT
            window.navigationBarColor = Color.TRANSPARENT
        }
        with(Flutter.createView(this@FlutterPresenterActivity, lifecycle, "about")) {
            setContentView(this, FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,
                    FrameLayout.LayoutParams.MATCH_PARENT))
            return this
        }
    }

    /**
     * 初始化MethodChannel
     * @param flutterView FlutterView對(duì)象
     */
    private fun initMethodChannel(flutterView: FlutterView) {
        methodChannel = MethodChannel(flutterView, ChannelName)
        methodChannel?.setMethodCallHandler { methodCall, result ->
            when (methodCall.method) {
                "activityFinish" -> goBack() //關(guān)閉當(dāng)前頁(yè)面
            }
        }
    }

    override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
        if (event?.action == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_BACK) {
            goBack() //返回上一個(gè)頁(yè)面
            return true
        }
        return super.onKeyDown(keyCode, event)
    }

    private fun goBack() {
        this.finish()
        overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_right)
    }

}

Flutter端代碼：
main.dart

import 'dart:ui';
import 'package:each_family/data/color_theme.dart';
import 'package:each_family/ui/about_page.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  runApp(new MyApp());
  SystemChrome.setSystemUIOverlayStyle(new SystemUiOverlayStyle(
    statusBarColor: new Color(0x00000000),
  ));
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: ColorTheme.lightBlue,
        primaryColorBrightness: Brightness.dark,
        brightness: Brightness.light,
        accentColorBrightness: Brightness.dark,
      ),
      home: _showPageByRouteName(window.defaultRouteName), //window.defaultRouteName 是路由入口
    );
  }

  Widget _showPageByRouteName(String routeName) {
    switch (routeName) {
      case "about":
        return new AboutPage();
      default:
        return new AboutPage();
//        return new HomePage(title: "主頁(yè)");
    }
  }
}

about_page.dart

import 'package:each_family/core/channel/activity_channel.dart';
import 'package:flutter/material.dart';

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

  final String title;

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

class _AboutPageState extends State<AboutPage> {
  void _goBack() => ActivityChannel.goBackToHistory();

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        centerTitle: true,
        elevation: 0.0,
        leading: new InkWell(
          onTap: _goBack,
          child: new Padding(
            padding: const EdgeInsets.all(18.0),
            child: new Image.asset(
              "assets/images/ic_nav_back.png",
              fit: BoxFit.scaleDown,
            ),
          ),
        ),
        title: new Text('關(guān)于我們'),
      ),
      body: new Center(
        child: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            new Text(
              '關(guān)于我們',
            ),
          ],
        ),
      ),
    );
  }
}

toast.dart

import 'package:flutter/services.dart';

class Toast {
  static const _platform = const MethodChannel("com.demo.flutter/toast");

  static void showShortToast(String message) =>
      _platform.invokeMethod("showShortToast", {"message": message});

  static void showLongToast(String message) =>
      _platform.invokeMethod("showLongToast", {"message": message});

  static void showToast(String message, int duration) =>
      _platform.invokeMethod("showToast", {"message": message, "duration": duration});
}

activity_channel.dart

import 'package:flutter/services.dart';

class ActivityChannel {
  static const _platform = const MethodChannel("com.whitehorse.everyhouse/activity");

  static void goBackToHistory() => _platform.invokeMethod("activityFinish");
}

color_theme.dart

import 'package:flutter/material.dart';

class ColorTheme extends MaterialColor {
  ColorTheme(int primary, Map<int, Color> swatch) : super(primary, swatch);

  static const int _bluePrimaryValue = 0xFF25C4FF;

  static const MaterialColor lightBlue = MaterialColor(
    _bluePrimaryValue,
    <int, Color>{
      50: Color(0xFFE3F2FD),
      100: Color(0xFFBBDEFB),
      200: Color(0xFFa0CAF9),
      300: Color(0xFF94B5F6),
      400: Color(0xFF89A5F5),
      500: Color(_bluePrimaryValue),
      600: Color(0xFF5688E5),
      700: Color(0xFF4576D2),
      800: Color(0xFF3565C0),
      900: Color(0xFF23a9ff),
    },
  );
}

這大致就是一個(gè)完成的demo示例了，有興趣的小伙伴可以拿來(lái)跑跑看！