HarmonyOS detectBarcode接口能力问题

按照以下文档使用detectBarcode.decode的识图二维码扫码能力

https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/scan-imagedecode-V5

运行在模拟器上报以下错误

Device info:emulator
Build info:emulator 5.0.0.25(SP37DEVC00E25R4P11log)
Fingerprint:a5572fb9d9a7494e164622f6bbb9654de3ad3c8045afb1cbdab15e2f247da911
Module name:com.example.test_sensor
Version:1.0.0
VersionCode:1000000
PreInstalled:No
Foreground:No
Pid:24637
Uid:20020045
Reason:TypeError
Error name:TypeError
Error message:Cannot read property decode of undefined
SourceCode:
  detectBarcode.decode(inputImage, (error: BusinessError, result: Array<scanBarcode.ScanResult>) => {
    ^
    Stacktrace:
      at initQrCode (entry/src/main/ets/pages/Index.ets:63:7)
    at anonymous (entry/src/main/ets/pages/Index.ets:168:11)

执行代码：

let inputImage: detectBarcode.InputImage = { uri: 'file://media/Photo/2/Image/Image.jpeg' }
detectBarcode.decode(inputImage, (error: BusinessError, result: Array<scanBarcode.ScanResult>) => {
  if (error && error.code) {
    hilog.error(0x0001, '[Scan Sample]',
      `Failed to get ScanResult by callback. Code: ${error.code}, message: ${error.message}`);
    return;
  }
  hilog.info(0x0001, '[Scan Sample]',
    `Succeeded in getting ScanResult by callback, result is ${JSON.stringify(result)}`);
});
//'file://media/Photo/2/Image/Image.jpeg' 是我通过文档样例的picker获取到的结果地址，是实际选取图片的地址，运行上述代码需要加上picker选图片获取到图片地址

try-catch上述代码没catch到有用的error信息。

如果是模拟器对于这个接口不支持，那我要怎么获取到哪些接口能力在模拟器上不支持的信息呢？以及目前真机和模拟器都有哪些具体区别有文档说明吗

HarmonyOS

fox280

2024-12-23 16:41:33

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回答 1

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回答 1

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aquaa

使用detectBarcode.decode的demo请参考：

import { scanBarcode, detectBarcode } from '@kit.ScanKit';
import { picker } from '@kit.CoreFileKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct RefreshExample {

  test(){
    // 通过picker拉起图库并选择图片
    let photoOption = new picker.PhotoSelectOptions();
    photoOption.MIMEType = picker.PhotoViewMIMETypes.IMAGE_TYPE;
    photoOption.maxSelectNumber = 1;
    let photoPicker = new picker.PhotoViewPicker();
    photoPicker.select(photoOption).then((result) => {
      // 定义识码参数inputImage，其中uri为picker选择图片
      let inputImage: detectBarcode.InputImage = { uri: result.photoUris[0] }
      // 调用图片识码接口
      detectBarcode.decode(inputImage, (error: BusinessError, result: Array<scanBarcode.ScanResult>) => {
        if (error && error.code) {
          hilog.error(0x0001, '[Scan Sample]', `Failed to get ScanResult by callback. Code: ${error.code}, message: ${error.message}`);
          return;
        }
        hilog.info(0x0001, '[Scan Sample]', `Succeeded in getting ScanResult by callback, result is ${JSON.stringify(result)}`);
      });
    })
  }
  @State isRefreshing: boolean = false

  count:number = 89
  build() {
    Column() {
      Button('点我选择图片')
        .onClick(()=>{
          this.test()
        })
    }.grayscale(1)
  }
}

2024-12-23 18:23:55

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HarmonyOS detectBarcode接口能力问题

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