目录

一、Flutter_Boost是什么

二、准备工作

三、已经有Native项目

1、命令行进入项目目录

2、运行：flutter create -t module flutter_lib命令，flutter_lib这个名字自己起，代表flutter module的名称，运行完毕如下图。

3、编译android模板项目

4、在native项目的app的 build.gradle文件中添加 java8的支持

5、在native项目的settings.gradle文件中增加如下配置，关联flutter_lib,重点是要配置include_flutter.groovy文件的路劲，添加完毕后同步项目

6、native的app的build.gradle文件中添加flutter依赖并同步

7、添加flutter-boost，在flutter_lib的pubspec.yaml文件中添加如下依赖，这里是根据flutter_boost的github文档添加

8、检查链接是否正确，使用：flutter build apk命令检查是否完成flutter_boost和其他库的依赖，如果出现错误根据错误解决所有错误直到编译成功为止。9、native端flutter_boost初始化配置

Flutter-boost是咸鱼开源的一个flutter插件，是一个flutter-native混合开发解决方案，今天聊一聊flutter-boost如何集成到android原生项目

一、Flutter_Boost是什么

新一代Flutter-Native混合解决方案。 FlutterBoost是一个Flutter插件，它可以轻松地为现有原生应用程序提供Flutter混合集成方案。FlutterBoost的理念是将Flutter像Webview那样来使用。在现有应用程序中同时管理Native页面和Flutter页面并非易事。 FlutterBoost帮你处理页面的映射和跳转，你只需关心页面的名字和参数即可（通常可以是URL）。

二、准备工作

1、flutter sdk 的版本需要 v1.9.1-hotfixes分支，否则会编译失败.

2、原生项目最好先换成support库，androidx会出现意想不到的问题

3、保证flutter的运行环境正常

三、已经有Native项目

1、命令行进入项目目录

搭建Flutter-Native混合工程，并集成咸鱼Flutter_boost

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2、运行：flutter create -t module flutter_lib命令，flutter_lib这个名字自己起，代表flutter module的名称，运行完毕如下图。

image

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​

这个时候你的native工程下会出现一个“flutter_lib”的目录，如下图

image

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3、编译android模板项目

命令行进入 ".android"目录下，执行“gradlew flutter:assembleDebug”命令，运行完毕后会在 .android/Flutter/build/outputs/aar/目录下生成flutter-debug.aar

4、在native项目的app的 build.gradle文件中添加 java8的支持

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5、在native项目的settings.gradle文件中增加如下配置，关联flutter_lib,重点是要配置include_flutter.groovy文件的路劲，添加完毕后同步项目

image

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​

6、native的app的build.gradle文件中添加flutter依赖并同步

implementation project(':flutter')

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7、添加flutter-boost，在flutter_lib的pubspec.yaml文件中添加如下依赖，这里是根据flutter_boost的github文档添加

dev_dependencies:
  flutter_test:
    sdk: flutter

  flutter_boost:
    git:
      url: 'https://github.com/alibaba/flutter_boost.git'
      ref: '0.1.60'

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8、检查链接是否正确，使用：flutter build apk命令检查是否完成flutter_boost和其他库的依赖，如果出现错误根据错误解决所有错误直到编译成功为止。

9、native端flutter_boost初始化配置

第一步：app的build.gradle文件中添加flutter_boost依赖

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第二步：自定义Application并在onCreate中初始化flutter_boost

public class MyApplication extends Application {
    private final static String TAG = MyApplication.class.getSimpleName();

    @Override
    public void onCreate() {
        super.onCreate();
        //路由,Flutter 启动Native页面的时候回调这里
        INativeRouter router = new INativeRouter() {
            @Override
            public void openContainer(Context context, String url, Map<String, Object> urlParams, int requestCode, Map<String, Object> exts) {
                Log.i(TAG, "路由--INativeRouter:url=" + url);
                Log.i(TAG, "路由--INativeRouter:requestCode=" + requestCode);
                Log.i(TAG, "路由--INativeRouter:urlParams=" + urlParams);
                Log.i(TAG, "路由--INativeRouter:exts=" + exts);

                String assembleUrl = Utils.assembleUrl(url, urlParams);
                PageRouter.openPageByUrl(context, assembleUrl, urlParams);
            }
        };
        //插件注册
        FlutterBoost.BoostPluginsRegister pluginsRegister = new FlutterBoost.BoostPluginsRegister() {
            @Override
            public void registerPlugins(PluginRegistry mRegistry) {
                GeneratedPluginRegistrant.registerWith(mRegistry);
                //注册native的TextView插件，插件名称：TextPlatformViewPlugin
                TextPlatformViewPlugin.register(mRegistry.registrarFor("TextPlatformViewPlugin"));
            }
        };
        //配置
        Platform platform = new FlutterBoost.ConfigBuilder(this, router)
                .isDebug(true)
                .whenEngineStart(FlutterBoost.ConfigBuilder.ANY_ACTIVITY_CREATED)
                .renderMode(FlutterView.RenderMode.texture)
                .pluginsRegister(pluginsRegister)
                .build();

        //初始化flutter_boost
        FlutterBoost.instance().init(platform);
    }
}

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第三步：在Native的Activity中编写调用代码，native调用flutter，通过传入url和params打开对应的Flutter widget

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btnOpenNative;
    private Button btnOpenFlutter;
    private Button btnOpenFlutterFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnOpenNative = findViewById(R.id.btnOpenNativePage);
        btnOpenFlutter = findViewById(R.id.btnOpenFlutterPage);
        btnOpenFlutterFragment = findViewById(R.id.btnOpenFlutterFragment);

        btnOpenNative.setOnClickListener(this);
        btnOpenFlutter.setOnClickListener(this);
        btnOpenFlutterFragment.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        Map<String, String> params = new HashMap<>();
        params.put("test1", "v_test1");
        params.put("test2", "v_test2");
        switch (v.getId()) {
            case R.id.btnOpenNativePage:
                PageRouter.openPageByUrl(this, PageRouter.NATIVE_PAGE_URL, params);
                break;
            case R.id.btnOpenFlutterPage:
                //打开一个flutter页面
                PageRouter.openPageByUrl(this, PageRouter.FLUTTER_PAGE_URL, params);
                break;
            case R.id.btnOpenFlutterFragment:
                //打开一个flutter创建的fragment的activity原生page
                PageRouter.openPageByUrl(this, PageRouter.FLUTTER_FRAGMENT_PAGE_URL, params);
                break;
        }
    }
}

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页面路由控制的辅助类PageRouter的实现，它负责管理Native到Flutter的路由调用以及Flutter调用Native的路由

public class PageRouter {

    public final static Map<String, String> pageName = new HashMap<String, String>() {{

        put("first", "first");
        put("second", "second");
        put("tab", "tab");
        put("sample://flutterPage", "flutterPage");
    }};

    public static final String NATIVE_PAGE_URL = "sample://nativePage";
    public static final String FLUTTER_PAGE_URL = "sample://flutterPage";
    public static final String FLUTTER_FRAGMENT_PAGE_URL = "sample://flutterFragmentPage";

    public static boolean openPageByUrl(Context context, String url, Map params) {
        return openPageByUrl(context, url, params, 0);
    }

    public static boolean openPageByUrl(Context context, String url, Map params, int requestCode) {

        String path = url.split("\\?")[0];

        Log.i("openPageByUrl", path);

        try {
            if (pageName.containsKey(path)) {
                //打开指定url的flutter页面
                Intent intent = BoostFlutterActivity.withNewEngine().url(pageName.get(path)).params(params)
                        .backgroundMode(BoostFlutterActivity.BackgroundMode.opaque).build(context);
                if (context instanceof Activity) {
                    Activity activity = (Activity) context;
                    activity.startActivityForResult(intent, requestCode);
                } else {
                    context.startActivity(intent);
                }
                return true;
            } else if (url.startsWith(FLUTTER_FRAGMENT_PAGE_URL)) {
                //打开flutter创建的fragment
                context.startActivity(new Intent(context, FlutterFragmentPageActivity.class));
                return true;
            } else if (url.startsWith(NATIVE_PAGE_URL)) {
                //打开原生Activity
                context.startActivity(new Intent(context, NativePageActivity.class));
                return true;
            }
            return false;
        } catch (Throwable t) {
            return false;
        }
    }
}

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Flutter侧代码实现，在flutter侧直接实现对应的Widget，最后根据路由pageName将其返回给native即可

import 'package:flutter/material.dart';
import 'package:flutter_boost/flutter_boost.dart';
import 'package:flutter_lib/page_widgets.dart';

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

class MyApp extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _MyAppState();
  }
}

class _MyAppState extends State<MyApp> {
  @override
  void initState() {
    super.initState();

    ///FlutterBoost注册，给Native返回Flutter的pageWidget
    FlutterBoost.singleton.registerPageBuilders({
      'flutterFragment': (pageName, params, _) => FragmentRouteWidget(params),

      ///可以在native层通过 getContainerParams 来传递参数
      'flutterPage': (pageName, params, _) {
        print("flutterPage params:$params");
        return FlutterRouteWidget(params: params);
      },
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Boose example',
      builder: FlutterBoost.init(postPush: _onRoutePushed),
      home: Container(),
    );
  }

  ///
  /// 当Native调用flutter widget时回调
  ///
  void _onRoutePushed(
      String pageName, String uniqueId, Map params, Route route, Future _) {
    print("flutter端路由：pageName:$pageName\n params:$params\n route:$route");
  }
}

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FlutterRouteWidget组件实现，一个flutter实现的native Activity页面

///
/// flutter提供给native的页面widget
///
class FlutterRouteWidget extends StatefulWidget {
  //构造方法，接受native传递的参数
  FlutterRouteWidget({this.params, this.message});

  final Map params;
  final String message;

  @override
  State<StatefulWidget> createState() {
    return _FlutterRouteWidgetState();
  }
}

class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
  @override
  Widget build(BuildContext context) {
    final String message = widget.message;
    return Scaffold(
      appBar: AppBar(
        brightness: Brightness.light,
        backgroundColor: Colors.white,
        textTheme: new TextTheme(title: TextStyle(color: Colors.black)),
        title: Text('flutter_boost_example'),
      ),
      body: Container(
        margin: const EdgeInsets.all(24.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            Container(
              margin: const EdgeInsets.only(top: 10.0, bottom: 20.0),
              child: Text(
                message ??
                    "This is a flutter activity\n params:${widget.params}",
                style: TextStyle(fontSize: 28.0, color: Colors.blue),
              ),
              alignment: AlignmentDirectional.center,
            ),
            InkWell(
              child: Container(
                padding: const EdgeInsets.all(8.0),
                margin: const EdgeInsets.all(8.0),
                color: Colors.yellow,
                child: Text(
                  'open native page',
                  style: TextStyle(fontSize: 22.0, color: Colors.black),
                ),
              ),

              ///点击事件，打开Native
              ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
              ///例如：sample://nativePage?aaa=bbb
              onTap: () => FlutterBoost.singleton
                  .open("sample://nativePage", urlParams: {
                "query": {"aaa": "bbb"}
              }),
            )
          ],
        ),
      ),
    );
  }
}

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FragmentRouteWidget组件实现，flutter实现的native的Fragment

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///
/// flutter实现的fragment
///
class FragmentRouteWidget extends StatelessWidget {
  FragmentRouteWidget(this.params);

  final Map params;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('flutter_boost_example'),
      ),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Container(
            margin: const EdgeInsets.only(top: 80.0),
            child: Text(
              "This is a flutter fragment",
              style: TextStyle(fontSize: 28.0, color: Colors.blue),
            ),
            alignment: AlignmentDirectional.center,
          ),
          InkWell(
            child: Container(
                padding: const EdgeInsets.all(8.0),
                margin: const EdgeInsets.all(8.0),
                color: Colors.yellow,
                child: Text(
                  'open native page',
                  style: TextStyle(fontSize: 22.0, color: Colors.black),
                )),
            onTap: () => FlutterBoost.singleton.open("sample://nativePage"),
          )
        ],
      ),
    );
  }
}

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第四步：AndroidMenifest文件的配置，注册BoostFlutterActivity，这个类必须注册不然无法启动Flutter Widget，在所有需要启动Flutter Widget的Activity注册时都需要加入 ：android：hardwareAccelerated="true”这个属性。

 <!--        这个必须注册，不然无法打开flutter的页面-->
        <activity
            android:name="com.idlefish.flutterboost.containers.BoostFlutterActivity"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density"
            android:hardwareAccelerated="true"
            android:screenOrientation="portrait"
            android:theme="@style/Theme.AppCompat"
            android:windowSoftInputMode="adjustResize">
            <meta-data
                android:name="io.flutter.embedding.android.SplashScreenDrawable"
                android:resource="@drawable/page_loading" />

        </activity>

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以上步骤都走完之后就可以编译运行了，本次的重点在于讲解Native项目怎么样集成flutter并引入Flutter_boost，关于flutter_boost的具体用法后面会推出。

最后贴出我最终运行后的结果图：

图1 点击 “打开Flutter页面”---->图2，点击“open native page” ----->图3

image

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image

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image

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​

我的博客：https://blog.csdn.net/qq_19979101

flutter-boot搭建flutter混合项目：https://blog.csdn.net/qq_19979101/article/details/103777979