HarmonyOS H5与应用侧数据交互的Demo

希望提供H5与应用侧数据交互的Demo，包含以下场景：
1：应用侧调用H5
2：H5调用应用侧
3：应用侧和H5数据通道连接
HarmonyOS
zxjiu
2024-09-05 12:29:28
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//场景1 
//应用侧代码 
import web_webview from '@ohos.web.webview'; 
import business_error from '@ohos.base'; 
/** 
 * 应用侧调用h5 
 */ 
@Entry 
@Component 
struct ArkTSInvokeH5Page { 
  controller: web_webview.WebviewController = new web_webview.WebviewController(); 
  @State webResult: string = '' 
 
  build() { 
    Column() { 
      Text(this.webResult).fontSize(20) 
      Web({ src: $rawfile('ArkTSInvokeH5.html'), controller: this.controller }) 
        .javaScriptAccess(true) 
        .onPageEnd(e => { 
          try { 
            this.controller.runJavaScript( 
              'test()', 
              (error, result) => { 
                if (error) { 
                  let e: business_error.BusinessError = error as business_error.BusinessError; 
                  console.error(`run JavaScript error, ErrorCode: ${e.code},  Message: ${e.message}`); 
                  return; 
                } 
                if (result) { 
                  this.webResult = result 
                  console.info(`The test() return value is: ${result}`) 
                } 
              }); 
            if (e) { 
              console.info('url: ', e.url); 
            } 
          } catch (error) { 
            let e: business_error.BusinessError = error as business_error.BusinessError; 
            console.error(`ErrorCode: ${e.code},  Message: ${e.message}`); 
          } 
        }) 
    } 
  } 
} 
//场景1 
//html代码 
<!-- index.html --> 
  <!DOCTYPE html> 
  <html> 
  <meta charset="utf-8"> 
  <body> 
  Hello world! 
  </body> 
  <script type="text/javascript"> 
  function test() { 
    console.log('Ark WebComponent') 
    return "This value is from index.html" 
  } 
  </script> 
  </html>
//场景2 
//应用侧代码 
import web_webview from '@ohos.web.webview'; 
 
/** 
 *H5调用应用侧 
 */ 
 
 
class testClass { 
  constructor() { 
  } 
 
  test(): string { 
    return 'ArkTS Hello World!'; 
  } 
} 
 
@Entry 
@Component 
struct H5InvokeArkTSPage { 
  webviewController: web_webview.WebviewController = new web_webview.WebviewController(); 
  // 声明需要注册的对象 
  @State testObj: testClass = new testClass(); 
 
  build() { 
    Column() { 
      // web组件加载本地index.html页面 
      Web({ src: $rawfile('H5InvokeArkTS.html'), controller: this.webviewController}) 
        // 将对象注入到web端 
        .javaScriptProxy({ 
          object: this.testObj, 
          name: "testObjName", 
          methodList: ["test"], 
          controller: this.webviewController 
        }) 
    }.height('100%').width('100%').justifyContent(FlexAlign.Center) 
  } 
} 
//场景2 
//html代码 
<!DOCTYPE html> 
  <html> 
  <head> 
  <style> 
#demo { 
  text-align: center; 
  font-size: 24px; /* 设置字体大小为24像素 */ 
} 
 
</style> 
  </head> 
  <body> 
  <button type="button" onclick="callArkTS()">Click Me!</button> 
  <p id="demo"></p> 
  <script> 
  function callArkTS() { 
    let str = testObjName.test(); 
    document.getElementById("demo").innerHTML = str; 
    console.info('ArkTS Hello World! :' + str); 
  } 
  </script> 
  </body> 
  </html>
//场景3 
//应用侧代码 
import web_webview from '@ohos.web.webview'; 
import business_error from '@ohos.base'; 
@Entry 
@Component 
struct ArkTSCommunicateWithH5Page { 
  controller: web_webview.WebviewController = new web_webview.WebviewController(); 
  ports: web_webview.WebMessagePort[] = []; 
  @State sendFromEts: string = '发送到H5的数据：'; 
  @State receivedFromHtml: string = '接收H5的信息：'; 
  build() { 
    Column() { 
      // 展示接收到的来自HTML的内容 
      Text(this.receivedFromHtml) 
      // 输入框的内容发送到HTML 
      TextInput({placeholder: '发送消息到H5'}) 
        .onChange((value: string) => { 
          this.sendFromEts = value; 
        }) 
      Button('发送至H5') 
        .onClick(() => { 
          try { 
            // 1、创建两个消息端口。 
            this.ports = this.controller.createWebMessagePorts(); 
            // 2、在应用侧的消息端口(如端口1)上注册回调事件。 
            this.ports[1].onMessageEvent((result: web_webview.WebMessage) => { 
              let msg = '来自H5:'; 
              if (typeof(result) === 'string') { 
                console.info(`接受至H5: ${result}`); 
                msg = msg + result; 
              } else if (typeof(result) === 'object') { 
                if (result instanceof ArrayBuffer) { 
                  console.info(`接收h5: ${result.byteLength}`); 
                  msg = msg + 'lenght is ' + result.byteLength; 
                } else { 
                  console.info('not support'); 
                } 
              } else { 
                console.info('not support'); 
              } 
              this.receivedFromHtml = msg; 
            }) 
            this.controller.postMessage('__init_port__', [this.ports[0]], '*'); 
          } catch (error) { 
            let e: business_error.BusinessError = error as business_error.BusinessError; 
            console.error(`ErrorCode: ${e.code}, Message: ${e.message}`); 
          } 
          try { 
            if (this.ports && this.ports[1]) { 
              this.ports[1].postMessageEvent(this.sendFromEts); 
            } else { 
              console.error(`ports 为空`); 
            } 
          } catch (error) { 
            let e: business_error.BusinessError = error as business_error.BusinessError; 
            console.error(`ErrorCode: ${e.code}, Message: ${e.message}`); 
          } 
        }) 
      Web({ src: $rawfile('ArkTSCommunicateWithH5Page.html'), controller: this.controller }) 
    }.justifyContent(FlexAlign.Center) 
  } 
} 
//场景3 
//html代码 
<!DOCTYPE html> 
  <html> 
  <head> 
  <meta name="viewport" content="width=device-width, initial-scale=1.0"> 
  <title>H5和应用侧数据交互</title> 
  </head> 
  <body> 
  <h1>H5和应用侧数据交互案例</h1> 
  <div> 
  <input type="button" value="Send" onclick="PostMsgToEts(msgFromJS.value);"/><br/> 
  <input id="msgFromJS" type="text" value="请输入您要发送至ets的内容"/><br/> 
  </div> 
  <p class="output">显示收到的内容和发送ets</p> 
  </body> 
  <script> 
  var h5Port; 
var output = document.querySelector('.output'); 
window.addEventListener('message', function (event) { 
  if (event.data === '__init_port__') { 
    if (event.ports[0] !== null) { 
      h5Port = event.ports[0]; // 1. 保存从应用侧发送过来的端口。 
      h5Port.onmessage = function (event) { 
        // 2. 接收ets侧发送过来的消息。 
        var msg = '接受到来自ets的内容:'; 
        var result = event.data; 
        if (typeof(result) === 'string') { 
          console.info(`收到H5的内容, string is: ${result}`); 
          msg = msg + result; 
        } else if (typeof(result) === 'object') { 
          if (result instanceof ArrayBuffer) { 
            console.info(`收到H5, length is: ${result.byteLength}`); 
            msg = msg + 'lenght is ' + result.byteLength; 
          } else { 
            console.info('not support'); 
          } 
        } else { 
          console.info('not support'); 
        } 
        output.innerHTML = msg; 
      } 
    } 
  } 
}) 
function PostMsgToEts(data) { 
  if (h5Port) { 
    h5Port.postMessage(data); 
  } else { 
    console.error('H5数据为空'); 
  } 
} 
</script> 
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2024-09-05 18:09:23
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