HarmonyOS 在H5内使用沙箱路径显示图片失败

APP为H5+原生混合开发，图片上传成功后，在H5内使用沙箱路径显示图片失败，请问有什么解决方法吗？

<img src="/data/storage/el2/base/haps/entry/cache/IMG_20240703_151611.jpg">

HarmonyOS

zxjiu

2024-12-25 15:33:25

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回答 1

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回答 1

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H5中不能直接使用沙箱路径显示图片，可以将图片转为base64显示

//ets参考代码：
import { webview } from '@kit.ArkWeb';
import common from '@ohos.app.ability.common';
import fs from '@ohos.file.fs';
import { util } from '@kit.ArkTS';

// 获取应用文件路径
let context = getContext(this) as common.UIAbilityContext;
let pathDir = context.filesDir; // 应用通用文件路径

let filePath = pathDir + '/picture.png'
let arrayBuff = context.resourceManager.getMediaContentSync($r('app.media.startIcon')).buffer

let file = fs.openSync(filePath, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
fs.writeSync(file.fd, arrayBuff)
fs.closeSync(file);

@Entry
@Component
struct shaxiangtupian {
  private webviewController: webview.WebviewController = new webview.WebviewController();

  build() {
    Column() {
      Web({ src: $rawfile('shaxiangtupian.html'), controller: this.webviewController })
        .width('100%')
        .height('50%')

      Button("转base64显示图片")
        .onClick(() => {
          let filePath = pathDir + "/picture.png";
          let file1 = fs.openSync(filePath, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
          let array: ArrayBuffer = new ArrayBuffer(fs.statSync(file1.fd).size)
          fs.readSync(file1.fd, array)
          let unit = new Uint8Array(array)
          let base64 = new util.Base64Helper();
          let mystr = "data:image/png;base64," + base64.encodeToStringSync(unit);
          let base64Str = "myFunction(\"" + mystr + "\")"
          this.webviewController.runJavaScript(base64Str)
          console.log(`resultBase64Str = ${mystr}`)
        })
    }
  }
}
//H5参考代码：
<!DOCTYPE html>
  <html>
  <head>
  </head>

  <body>
  </div>

  <script>
  function myFunction(base64str) {
    var img = new Image();
    img.width = 200;
    img.height = 200;
    img.src = base64str;
    document.body.appendChild(img);
  }
  </script>
  </body>
  </html>

访问带域名的网络图片，需要声明网络权限ohos.permission.INTERNET，参考文档：

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/declare-permissions-V5

2024-12-25 17:20:39

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HarmonyOS 在H5内使用沙箱路径显示图片失败

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