在鸿蒙中如何把网络图片保存到相册中 - ToB企服应用市场:ToB评测及商务社交产业平台

import { abilityAccessCtrl, common } from '@kit.AbilityKit';
import { photoAccessHelper } from '@kit.MediaLibraryKit';
import fs from '@ohos.file.fs';
import { http } from '@kit.NetworkKit';
import { promptAction } from '@kit.ArkUI';
@Entry
@Component struct Index {
@State message: string = 'Hello World'
private appContext: common.Context = getContext(this);
private atManager = abilityAccessCtrl.createAtManager();
build() {
Row() {
Column() {
Text(this.message)
.fontSize(50)
.fontWeight(FontWeight.Bold)
Button("保存图片")
.margin({ top: 10 })
.onClick(async (event: ClickEvent) => {
//申请权限并保存图片到图库
try {
//申请相册管理模块权限'ohos.permission.WRITE_IMAGEVIDEO'
this.atManager.requestPermissionsFromUser(this.appContext, [ 'ohos.permission.WRITE_IMAGEVIDEO' ]).then(async () => {
//权限申请成功，保存到图库
let context = getContext();
//获取相册管理模块的实例，用于访问和修改相册中的媒体文件
let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(context);
// onClick触发后10秒内通过createAsset接口创建图片文件，10秒后createAsset权限收回
let uri = await phAccessHelper.createAsset(photoAccessHelper.PhotoType.IMAGE, 'jpg');
// 创建媒体文件
console.info('createAsset successfully, uri: ' + uri);
let file = fs.openSync(uri, fs.OpenMode.READ_WRITE || fs.OpenMode.CREATE);
let totalSize = 0;
let httpRequest = http.createHttp();
httpRequest.on("dataReceive", (data: ArrayBuffer) => {
let writeLen = fs.writeSync(file.fd, data);
totalSize = totalSize + writeLen; });
httpRequest.requestInStream('https://developer.huawei.com/allianceCmsResource/resource/HUAWEI_Developer_VUE/images/homeNew/next- pc.png',
{ method: http.RequestMethod.GET, connectTimeout: 3000, }, httpCode => {
console.info('requestInStream HTTP CODE is', httpCode) })
httpRequest.on("dataEnd", () => {
fs.close(file);
promptAction.showDialog({ title: "下载图片结束，并保存至相册", message: `图片大小:${totalSize}字节` }) }) })
} catch (err) {
console.error(`requestPermissionsFromUser call Failed! error: ${err.code}`); } }) }
.width('100%')
}
.height('100%')
}
}

复制代码