HarmonyOS5-NewsAPP-KnockShare

HarmonyOS 5 News Application - Knock Sharing Function Implementation Case Summary This article details the implementation of the knock sharing function in a HarmonyOS 5.0 news application. The KnockManager class is used to manage knock sharing events and achieve the sharing of news content.

export class KnockManager { private static instance: KnockManager private ctx?: common.UIAbilityContext private isBind: boolean = false private news?: NewsModel

static getInstance(ctx: common.UIAbilityContext, news: NewsModel) { if (!KnockManager.instance) { KnockManager.instance = new KnockManager(ctx, news) } return KnockManager.instance } constructor(ctx: common.UIAbilityContext, news: NewsModel) { this.ctx = ctx } // handle knock logic knockCallback(target: harmonyShare.SharableTarget) { if (this.news && this.ctx) { // demo cover is media resoure, write in sandbox const media = this.ctx.resourceManager.getMediaContentSync(this.news.cover as Resource) const filePath = this.ctx.filesDir + '/share_' + Date.now() + '.png' const file = fileIo.openSync(filePath, fileIo.OpenMode.READ_WRITE | fileIo.OpenMode.CREATE) fileIo.writeSync(file.fd, media.buffer) const uri = fileUri.getUriFromPath(filePath) // create share data const sharaData: systemShare.SharedData = new systemShare.SharedData({ utd: uniformTypeDescriptor.UniformDataType.HYPERLINK, content: ' `https://edition.cnn.com/2025/06/20/sport/lionel-messi-club-world-cup-inter-miami-spt` ', thumbnailUri: uri, title: this.news.title, description: this.news.company, }) // knock share target.share(sharaData) } } bindEvent() { if (!this.isBind) { harmonyShare.on('knockShare', (target) => { this.knockCallback(target) }) this.isBind = true } } unBindEvent() { harmonyShare.off('knockShare') this.isBind = false } }