鸿蒙实现相机拍照及相册选择照片

前言：

1.如果你的应用不是存储类型或者相机拍照类型，你就需要用 @kit.CameraKit Api 实现相机拍照和相册选择照片功能，如果你不用这个的话，你使用 picker.PhotoViewPicker ，你就需要申请权限，那你提交应用审核的时候就会被拒，说你使用了敏感权限。

2.以下是自己封装的一个工具类，可直接导入使用

import { camera, cameraPicker } from'@kit.CameraKit';

import { photoAccessHelper } from'@kit.MediaLibraryKit';

import fs from'@ohos.file.fs';

import { BusinessError } from'@kit.BasicServicesKit';

classPhotoPicker {

privateimgSrc:string = ''

//拍照

asynctakePhoto():Promise<string> {

const pickerResult = awaitcameraPicker.pick(getContext(),

cameraPicker.PickerMediaType.PHOTO\], { cameraPosition: camera.CameraPosition.CAMERA_POSITION_BACK }); **this**.saveImage(pickerResult.resultUri); **return this**.imgSrc; } //从相册中选 photoAccessHelper版 **async**pickPhoto():Promise\ { **const** PhotoSelectOptions = **new**photoAccessHelper.PhotoSelectOptions(); PhotoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE; //选择图片数量 PhotoSelectOptions.maxSelectNumber = 1; **let** photoPicker = **new**photoAccessHelper.PhotoViewPicker(); **try**{ **const** res = **await**photoPicker.select(PhotoSelectOptions) **if**(res.photoUris.length \<= 0) { **return** } **this**.saveImage(res.photoUris\[0\]) **return this**.imgSrc; } **catch**(e) { console.log('img----err--',JSON.stringify(e)) } } //存到应用缓存 **private**saveImage(src:string){ **try**{ **const** destPath = getContext(**this**).cacheDir **const**fileType = src.split('.')\[1

constfileName = Date.now()

constpath = `{destPath}/{fileName}.${fileType}`

constimgFile = fs.openSync(src,fs.OpenMode.READ_ONLY)

consttempFile = fs.openSync(path,fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE)

// 拷贝

fs.copyFileSync(imgFile.fd,tempFile.fd)

fs.close(imgFile)

fs.close(tempFile)

// 从沙箱中获取图片路径

// this.imgSrc = fileUri.getUriFromPath(path)

this.imgSrc = path

} catch(e) {

let err: BusinessError = e asBusinessError;

console.info("img--[picker] Photo Save error = " + JSON.stringify(err));

}

}

}

export const photoPicker = newPhotoPicker()