鸿蒙：从图库选择图片并上传到服务器

前言：

我们安全访问相册是不需要任何权限的，上传则需要网络权限，这点需要注意。

我们还是老样子，看着官方文档进行学习，链接如下：

文档中心https://developer.huawei.com/consumer/cn/doc/harmonyos-faqs/faqs-image-22接下来，我就不多说了，直接上效果图和封装好的代码：

1、Index.ets

import { uploadImageUtil } from './UploadImageUtil'

@Entry
@Component
struct Index {
  build() {
    Column() {
      Button('选择图片上传')
        .width('100%')
        .onClick(() => {
          uploadImageUtil.openPhotoPicker()
        })
    }
    .width('100%')
    .height('100%')
    .padding(16)
    .justifyContent(FlexAlign.End)
  }
}

2、UploadImageUtil.ets

import { common } from '@kit.AbilityKit';
import { photoAccessHelper } from '@kit.MediaLibraryKit';
import { fileIo as fs } from '@kit.CoreFileKit';
import { request } from '@kit.BasicServicesKit';

class UploadImageUtil {
  uiContext: UIContext = AppStorage.get('UIContext') as UIContext

  openPhotoPicker() {
    // 获取应用文件路径
    let context = this.uiContext.getHostContext() as common.UIAbilityContext;
    let cacheDir = context.cacheDir;
    let photoPicker = new photoAccessHelper.PhotoViewPicker();
    photoPicker.select({
      MIMEType: photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE,
      maxSelectNumber: 1
    }, (_, result) => {
      if (result) {
        result.photoUris.forEach((uri) => {
          let file = fs.openSync(uri, fs.OpenMode.CREATE);
          // 复制文件到缓存目录下
          fs.copyFileSync(file.fd, cacheDir + '/test.jpeg');
          this.uploadImage(['internal://cache/test.jpeg']);
        })
      }
    })
  }

  private uploadImage(paths: string[]) {
    let allFiles = Array<request.File>();
    let header = new Map<Object, string>();
    header.set('Content-Type', 'multipart/form-data');
    header.set('key2', 'value2');
    for (let i = 0; i < paths.length; i++) {
      allFiles[i] = {
        name: 'image' + i + '.jpeg',
        filename: 'image' + i + '.jpeg',
        uri: paths[i],
        type: 'image'
      }
    }
    let data: Array<request.RequestData> = [{ name: 'name', value: 'value' }];
    let url = 'http://XXX&#34';
    this.uiContext.showAlertDialog({ message: "上传图片请使用自己的接口地址" })
    let uploadConfig: request.UploadConfig = {
      // 将这个url替换成你的接口地址
      url: url,
      header: header,
      method: 'POST',
      files: allFiles,
      data: data
    }
    try {
      request.uploadFile(this.uiContext.getHostContext(), uploadConfig, (error, uploadTask) => {
        if (uploadTask) {
          uploadTask.on('progress', (uploadSize: number, totalSize: number) => {
            console.info('progress,uploadedSize:' + uploadSize + ',totalSize:' + totalSize);
          })
        } else {
          console.info('upload failure:' + error);
        }
      })
    } catch (error) {
      console.info('upload failure:' + error);
    }
  }
}


export const uploadImageUtil = new UploadImageUtil();

3、EntryAbility.ets

  onWindowStageCreate(windowStage: window.WindowStage): void {

    // Main window is created, set main page for this ability
    hilog.info(DOMAIN, 'testTag', '%{public}s', 'Ability onWindowStageCreate');
    windowStage.loadContent('pages/Index', (err) => {
////···································添加下面的代码························
      let context = windowStage.getMainWindowSync().getUIContext()
      AppStorage.setOrCreate('UIContext', context)
   
/////································

  }

4、补充：

网络权限在module.json5中添加

   "requestPermissions": [
      {
        "name": "ohos.permission.INTERNET"
      }
]

以上是个人经验分享