少湖说 | 科技自媒体

import { BinaryMessenger } from '@ohos/flutter_ohos/src/main/ets/plugin/common/BinaryMessenger';
import MessageCodec from '@ohos/flutter_ohos/src/main/ets/plugin/common/MessageCodec';
import PlatformViewFactory from '@ohos/flutter_ohos/src/main/ets/plugin/platform/PlatformViewFactory';
import { CustomView } from './CustomView';
import common from '@ohos.app.ability.common';
import PlatformView from '@ohos/flutter_ohos/src/main/ets/plugin/platform/PlatformView';

export class CustomFactory extends PlatformViewFactory {
  message: BinaryMessenger;

  constructor(message: BinaryMessenger, createArgsCodes: MessageCodec<Object>) {
    super(createArgsCodes);
    this.message = message;
  }

  public create(context: common.Context, viewId: number, args: Object): PlatformView {
    return new CustomView(context, viewId, args, this.message);
  }
}

import  { FlutterPlugin,
  FlutterPluginBinding } from '@ohos/flutter_ohos/src/main/ets/embedding/engine/plugins/FlutterPlugin';
import StandardMessageCodec from '@ohos/flutter_ohos/src/main/ets/plugin/common/StandardMessageCodec';
import { CustomFactory } from './CustomFactory';

export class CustomPlugin implements FlutterPlugin {
  getUniqueClassName(): string {
    return 'CustomPlugin';
  }

  onAttachedToEngine(binding: FlutterPluginBinding): void {
    binding.getPlatformViewRegistry()?.
    registerViewFactory('com.rex.custom.ohos/customView', new CustomFactory(binding.getBinaryMessenger(), StandardMessageCodec.INSTANCE));
  }

  onDetachedFromEngine(binding: FlutterPluginBinding): void {}
}

import MethodChannel, {
  MethodCallHandler,
  MethodResult
} from '@ohos/flutter_ohos/src/main/ets/plugin/common/MethodChannel';
import PlatformView, { Params } from '@ohos/flutter_ohos/src/main/ets/plugin/platform/PlatformView';
import common from '@ohos.app.ability.common';
import { BinaryMessenger } from '@ohos/flutter_ohos/src/main/ets/plugin/common/BinaryMessenger';
import StandardMethodCodec from '@ohos/flutter_ohos/src/main/ets/plugin/common/StandardMethodCodec';
import MethodCall from '@ohos/flutter_ohos/src/main/ets/plugin/common/MethodCall';
import { webview } from '@kit.ArkWeb';

@Component
struct ButtonComponent {
  @Prop params: Params
  customView: CustomView = this.params.platformView as CustomView
  @StorageLink('numValue') storageLink: string = "first"
  @State bkColor: Color = Color.Red

  private webviewController: WebviewController = new webview.WebviewController()

  build() {
    Web({src: 'https://baidu.com', controller: this.webviewController})
      .domStorageAccess(true)
      .fileAccess(true)
      .mixedMode(MixedMode.All)
      .databaseAccess(true)
      .userAgent("Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.71 Safari/537.36")
  }
}

@Builder
function ButtonBuilder(params: Params) {
  ButtonComponent({ params: params })
    .backgroundColor(Color.Transparent)
}

AppStorage.setOrCreate('numValue', 'test')

@Observed
export class CustomView extends PlatformView implements MethodCallHandler {
  numValue: string = "test";

  methodChannel: MethodChannel;
  index: number = 1;

  constructor(context: common.Context, viewId: number, args: ESObject, message: BinaryMessenger) {
    super();
    // 注册消息通道
    this.methodChannel = new MethodChannel(message, `com.rex.custom.ohos/customView${viewId}`, StandardMethodCodec.INSTANCE);
    this.methodChannel.setMethodCallHandler(this);
  }

  onMethodCall(call: MethodCall, result: MethodResult): void {
    // 接受Dart侧发来的消息
    let method: string = call.method;
    let link1: SubscribedAbstractProperty<number> = AppStorage.link('numValue');
    switch (method) {
      case 'getMessageFromFlutterView':
        let value: ESObject = call.args;
        this.numValue = value;
        link1.set(value)
        console.log("nodeController receive message from dart: " + this.numValue);
        result.success(true);
        break;
    }
  }

  public  sendMessage = () => {
    console.log("nodeController sendMessage")
    //向Dart侧发送消息
    this.methodChannel.invokeMethod('getMessageFromOhosView', 'natvie - ' + this.index++);
  }

  getView(): WrappedBuilder<[Params]> {
    return new WrappedBuilder(ButtonBuilder);
  }

  dispose(): void {
  }
}

import { FlutterAbility, FlutterEngine } from '@ohos/flutter_ohos';
import { GeneratedPluginRegistrant } from '../plugins/GeneratedPluginRegistrant';
import { CustomPlugin } from './CustomPlugin';

export default class EntryAbility extends FlutterAbility {
  configureFlutterEngine(flutterEngine: FlutterEngine) {
    super.configureFlutterEngine(flutterEngine)
    GeneratedPluginRegistrant.registerWith(flutterEngine)
    this.addPlugin(new CustomPlugin())
  }
}

import common from '@ohos.app.ability.common';
import { FlutterPage } from '@ohos/flutter_ohos'

let storage = LocalStorage.getShared()
const EVENT_BACK_PRESS = 'EVENT_BACK_PRESS'

@Entry(storage)
@Component
struct Index {
  private context = getContext(this) as common.UIAbilityContext
  @LocalStorageLink('viewId') viewId: string = "";

  build() {
    Column() {
      FlutterPage({ viewId: this.viewId })
    }
  }

  onBackPress(): boolean {
    this.context.eventHub.emit(EVENT_BACK_PRESS)
    return true
  }
}

aboutToAppear() {
  webview.WebviewController.setWebDebuggingAccess(true);
}

Web({src: 'https://baidu.com', controller: this.webviewController})
  .domStorageAccess(true)
  .fileAccess(true)
  .mixedMode(MixedMode.All)
  .databaseAccess(true)
  .javaScriptAccess(true)
  .onPageEnd(() => {
      this.webviewController.runJavaScript("document.querySelector('meta[http-equiv=\"Content-Security-Policy\"]').remove()");
  })

import { FlutterAbility, FlutterEngine } from '@ohos/flutter_ohos';
import { GeneratedPluginRegistrant } from '../plugins/GeneratedPluginRegistrant';
import ForestPlugin from './ForestPlugin';
import { BusinessError } from '@kit.BasicServicesKit';
import { window } from '@kit.ArkUI';
import { preferences } from '@kit.ArkData';

let dataPreferences: preferences.Preferences | null = null;

export default class EntryAbility extends FlutterAbility {

  onWindowStageCreate(windowStage: window.WindowStage): void {
    super.onWindowStageCreate(windowStage);
    preferences.getPreferences(this.context, 'forestStore', (err: BusinessError, val: preferences.Preferences) => {
      if (err) {
        console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
        return;
      }
      dataPreferences = val;
      console.info("Succeeded in getting preferences1.");
    })
  }

  configureFlutterEngine(flutterEngine: FlutterEngine) {
    super.configureFlutterEngine(flutterEngine)
    GeneratedPluginRegistrant.registerWith(flutterEngine)
    this.addPlugin(new ForestPlugin());
  }
}

export {dataPreferences};

import { Any, BasicMessageChannel, EventChannel, FlutterManager, FlutterPlugin, Log, MethodCall, MethodChannel, StandardMessageCodec} from '@ohos/flutter_ohos';
import { FlutterPluginBinding } from '@ohos/flutter_ohos/src/main/ets/embedding/engine/plugins/FlutterPlugin';
import { batteryInfo } from '@kit.BasicServicesKit';
import { MethodCallHandler, MethodResult } from '@ohos/flutter_ohos/src/main/ets/plugin/common/MethodChannel';
import { preferences } from '@kit.ArkData';
import { BusinessError } from '@kit.BasicServicesKit';
import {dataPreferences} from './EntryAbility';
import router from '@ohos.router'
import { webviewRouterParams } from '../pages/Webview';

const TAG = "[flutter][plugin][forest]";

export default class ForestPlugin implements FlutterPlugin {
  private channel?: MethodChannel;
  private basicChannel?: BasicMessageChannel<Any>;
  private api = new ForestApi();
  private dataPreferences: preferences.Preferences | null = null;

  onAttachedToEngine(binding: FlutterPluginBinding): void {
    this.channel = new MethodChannel(binding.getBinaryMessenger(), "xxx.com/app");
    this.channel.setMethodCallHandler({
      onMethodCall : (call: MethodCall, result: MethodResult) => {
        console.log(`${TAG}-->[${call.method}]: ${JSON.stringify(call.args)}`);
        switch (call.method) {
          case "getPrefs":
            this.api.getPrefs(String(call.args), result);
            break;
          case "setPrefs":
            let key = String(call.argument("key"));
            let value = String(call.argument("value"));
            this.api.setPrefs(key, value);
          default:
            result.notImplemented();
            break;
        }
      }
    })
  }
  //···
  onDetachedFromEngine(binding: FlutterPluginBinding): void {
    Log.i(TAG, "onDetachedFromEngine");
    this.channel?.setMethodCallHandler(null);
  }

  getUniqueClassName(): string {
    return "ForestPlugin";
  }

class ForestApi {
  getPrefs(key: string, result: MethodResult) {
    dataPreferences?.get(key, '', (err: BusinessError, val: preferences.ValueType) => {
      if (err) {
        console.error(`${TAG} Failed to get value of ${key}. code =` + err.code + ", message =" + err.message);
        result.success('');
      }
      console.info(`${TAG} Succeeded in getting value of ${key}:${val}.`);
      result.success(val);
    })

  }

  setPrefs(key: string, value: string) {
    dataPreferences?.put(key, value, (err: BusinessError) => {
      if (err) {
        console.error(`${TAG} Failed to put value of ${key}. code =` + err.code + ", message =" + err.message);
        return;
      }
      console.info(`${TAG} Succeeded in putting value of ${key}.`);
    })
  }

  clearPrefs(key: string) {
    dataPreferences?.delete(key, (err: BusinessError) => {
      if (err) {
        console.error("Failed to delete the key 'startup'. code =" + err.code + ", message =" + err.message);
        return;
      }
      console.info(`Succeeded in deleting the key ${key}.`);
    })
  }
}