HarmonyOS 鸿蒙Next 能否提供扫码的demo代码

发布于 1周前 作者 sinazl 来自 鸿蒙OS

HarmonyOS 鸿蒙Next 能否提供扫码的demo代码

能否提供扫码的demo代码

Harmonyos Next教程
2 回复

h5拉起系统扫码页面的demo如下：

// WebComponent.ets：

import web_webview from '[@ohos](/user/ohos).web.webview'

import { scanCore, scanBarcode } from '[@kit](/user/kit).ScanKit';

// 导入默认界面需要的日志模块和错误码模块

import { hilog } from '[@kit](/user/kit).PerformanceAnalysisKit';

import { BusinessError } from '[@kit](/user/kit).BasicServicesKit';

let options: scanBarcode.ScanOptions = {

scanTypes: [scanCore.ScanType.ALL],

enableMultiMode: true,

enableAlbum: true

};

class TestClass {

// arkts h5都用await保障执行顺序

async scan(): Promise<string> {

let scanResult = await scanBarcode.startScanForResult(getContext(this), options)

// 收到扫码结果后返回

hilog.info(0x0001, '[Scan CPSample]', 'Promise scan result: %{public}s', JSON.stringify(scanResult));

return scanResult.originalValue;

}

}

[@Entry](/user/Entry)

[@Component](/user/Component)

export struct PageWeb {

readonly webUrl: string | Resource = 'www.baidu.com'

readonly controller: WebviewController = new web_webview.WebviewController()

userAgentAlreadySet: boolean = false

[@State](/user/State) customUserAgent?: string = undefined

[@State](/user/State) testObj: TestClass = new TestClass();

build() {

if (this.customUserAgent) {

Column() {

Web({ src: $rawfile('index.html'), controller: this.controller })

.domStorageAccess(true)

.javaScriptProxy({

object: this.testObj,

name: "testObjName",

methodList: ["scan"],

controller: this.controller

})

}

}

}

aboutToAppear(): void {

// 模拟异步构建 customUserAgent 过程

setTimeout(() => this.customUserAgent = 'ua/value', 200)

}

applyCustomUserAgent(): void {

this.userAgentAlreadySet = true

let defaultUserAgent = this.controller.getUserAgent()

this.controller.setCustomUserAgent(defaultUserAgent + ' ' + this.customUserAgent)

this.controller.loadUrl(this.webUrl)

}

onBackPress(): boolean | void {

// 自定义页面返回逻辑

// if (this.controller.accessBackward()) {

// this.controller.backward()

// return true

// }

return true;

}

}

<!-- index.html -->

<!DOCTYPE html>

<html>

<body>

<button type="button" onclick="callArkTS()">Click Me!</button>

<p id="demo"></p>

<script>

async function callArkTS() {

let str = await testObjName.scan();

document.getElementById("demo").innerHTML = str;

console.info('ArkTS Hello World! :' + str);

}

</script>

</body>

</html>

更多关于HarmonyOS 鸿蒙Next 能否提供扫码的demo代码的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html


HarmonyOS 鸿蒙Next 在其API库中已经集成了扫码功能的相关模块，您可以直接使用这些模块来实现扫码功能。以下是一个简化的扫码Demo代码示例，主要展示了如何调用鸿蒙系统的扫码接口：

#include <ohos/aafwk/ability/Ability.h>
#include <ohos/aafwk/content/Intent.h>
#include <ohos/camera/CameraKit.h>
#include <ohos/camera/ScanCodeResult.h>

using namespace OHOS::AAFwk;
using namespace OHOS::Camera;

class ScanAbility : public Ability {
public:
    void OnStart(const Intent &intent) override {
        CameraKit::GetInstance().StartScan(
            [](const ScanCodeResult &result) {
                // 处理扫码结果
                if (result.IsValid()) {
                    // 扫码成功，处理result.GetText()
                }
            },
            [](int errorCode) {
                // 处理扫码失败
            }
        );
    }
};

// 注册Ability
OHOS_REGISTER_ABILITY(ScanAbility)

请注意，上述代码为简化示例，未包含完整的错误处理和生命周期管理。在实际应用中，您需要处理更多细节，如权限申请、UI更新等。

如果问题依旧没法解决请联系官网客服,官网地址是：https://www.itying.com/category-93-b0.html

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