虽然闲鱼的flutter-boost已经将原生和flutter的关系拉近，配置起来也很方便，但是也需要知道其中的原理

    1. package org.devio.`as`.proj.common.flutter
    3. import com.alibaba.android.arouter.launcher.ARouter
    4. import io.flutter.embedding.engine.FlutterEngine
    5. import io.flutter.plugin.common.MethodCall
    6. import io.flutter.plugin.common.MethodChannel
    8. class HiFlutterBridge : IHIBridge<Any?, MethodChannel.Result>, MethodChannel.MethodCallHandler {
    10.     private var methodChannels = mutableListOf<MethodChannel>()
    12.     companion object {
    13.         @JvmStatic
    14.         var instance: HiFlutterBridge? = null
    15.             private set
    17.         @JvmStatic
    18.         fun init(flutterEngine: FlutterEngine): HiFlutterBridge {
    19.             val methodChannel = MethodChannel(flutterEngine.dartExecutor, "HiFlutterBridge")
    20.             if (instance == null) {
    21.                 HiFlutterBridge().also { instance = it }
    22.             }
    23.             // 单利模式  保存methodChannel
    24.             methodChannel.setMethodCallHandler(instance)
    25.             instance!!.apply {
    26.                 methodChannels.add(methodChannel)
    27.             }
    28.             return instance!!
    29.         }
    30.     }
    32.     fun fire(method: String, arguments: Any?) {
    33.         methodChannels.forEach {
    34.             it.invokeMethod(method, arguments)
    35.         }
    36.     }
    38.     fun fire(method: String, arguments: Any?, callBack: MethodChannel.Result) {
    39.         methodChannels.forEach {
    40.             it.invokeMethod(method, arguments, callBack)
    41.         }
    42.     }
    44.     override fun onBack(p: Any?) {
    45.         //
    46.     }
    48.     override fun gotoNative(p: Any?) {
    49.         if (p is Map<*, *>) {
    50.             val action = p["action"]
    51.             if (action == "goToDetail") {
    52.                 val goodsId = p["goodsId"]
    53.                 ARouter.getInstance().build("/detail/main").withString(
    54.                     "goodsId", goodsId as String
    55.                 ).navigation()
    56.             }
    57.         }
    58.     }
    60.     override fun getHeaderParams(callBack: MethodChannel.Result) {
    61.         //
    62.     }
    64.     override fun onMethodCall(call: MethodCall, result: MethodChannel.Result) {
    65.         when (call.method) {
    66.             "onBack" -> onBack(call.arguments)
    67.             "gotoNative" -> gotoNative(call.arguments)
    68.             "getHeaderParams" -> getHeaderParams(result)
    69.             else -> result.notImplemented()
    70.         }
    71.     }
    72. }
    1. import 'package:flutter/services.dart';
    3. class HiFlutterBridge {
    4.   static HiFlutterBridge _instance = HiFlutterBridge._();
    6.   MethodChannel _bridge = const MethodChannel("HiFlutterBridge");
    8.   var _listeners = {};
    10.   HiFlutterBridge._() {
    11.     _bridge.setMethodCallHandler((MethodCall call) {
    12.       String method = call.method;
    13.       if (_listeners[method] != null) {
    14.         return _listeners[method](call);
    15.       }
    16.       return null;
    17.     });
    18.   }
    20.   static HiFlutterBridge get instance => _instance;
    22.   MethodChannel get bridge => _bridge;
    24.   register(String method, Function(MethodCall) callback) {
    25.     _listeners[method] = callback;
    26.   }
    28.   unregister(String method) {
    29.     _listeners.remove(method);
    30.   }
    32.   gotoNative(Map params) {
    33.     _bridge.invokeMethod("gotoNative", params);
    34.   }
    35. }