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Harmony鸿蒙实战开发-背单词app【源码在文末】

运行工具：DevEco Studio

一、运行演示

1、登录

2、注册

3、开机动画

4、首页

5、开始学习

6、开始学习-看答案

7、统计分析

8、不背学堂

二、部分代码

import http from '@ohos.net.http'; import fs from '@ohos.file.fs'; import ReadOptions from "@ohos.file.fs" import common from '@ohos.app.ability.common'; import buffer from '@ohos.buffer'; export namespace YouDaoDict { const BUFFER_FILE_PATH = '/you_dao_dict_cache.json'; export type QueryResult = { source: string; pronunciation: { en?: string; us?: string; }; meaning: Array<{ position?: string; translation: string; }>; sentence: Array<{ sentence: string; translation: string; }>; }; let queryCache: Record<string, QueryResult> = undefined; async function loadLocalCache() { let context = getContext(this) as common.UIAbilityContext; let filePath = `${context.cacheDir}${BUFFER_FILE_PATH}` let file: fs.File; if (!await fs.access(filePath)) { file = await fs.open(filePath, fs.OpenMode.CREATE | fs.OpenMode.READ_WRITE); await fs.write(file.fd, '{}'); await fs.fdatasync(file.fd); await fs.close(file); } queryCache = JSON.parse(await fs.readText(filePath, { encoding: 'UTF-8' })); } async function cacheQuery(word: string): Promise<QueryResult> { if (queryCache === undefined) await loadLocalCache(); let result = queryCache[word]; if (result !== undefined) return result return null; } async function cacheAdd(word: string, result: QueryResult): Promise<void> { queryCache[word] = result; let serialized = JSON.stringify(queryCache); let context = getContext(this) as common.UIAbilityContext; let filePath = `${context.cacheDir}${BUFFER_FILE_PATH}` let file = await fs.open(filePath, fs.OpenMode.WRITE_ONLY | fs.OpenMode.CREATE); await fs.write(file.fd, serialized); await fs.fsync(file.fd); await fs.close(file); } export async function query(word: string): Promise<QueryResult> { let result: QueryResult | null = await cacheQuery(word); if (result) return result; let httpReq = http.createHttp(); let httpResponse = await new Promise<http.HttpResponse>((resolve, reject) => { httpReq.request( 'https://dict.youdao.com/jsonapi_s?doctype=json&jsonversion=4', { method: http.RequestMethod.POST, header:{ 'Content-Type':'application/x-www-form-urlencoded' }, extraData: `q=${word}` }, (err, data) => { if (err !== undefined) reject(err); resolve(data) } ) }) let res = JSON.parse(httpResponse.result.toString()); result = { source: word, pronunciation: { en: res['ec']['word']['ukphone'] as string, us: res['ec']['word']['usphone'] as string }, meaning: [], sentence: [] }; (res['ec']['word']['trs'] as Array<{ pos?: string; tran: string }>).forEach(elem => { result.meaning.push({ position: elem.pos, translation: elem.tran }); }); (res['blng_sents_part']['sentence-pair'] as Array<{ sentence?: string; 'sentence-translation': string }>).forEach(elem => { result.sentence.push({ sentence: elem.sentence, translation: elem['sentence-translation'] }); }) cacheAdd(word, result); return result; } }

三、源码

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