Harmony鸿蒙实战开发-背单词app「仿不背单词」【源码在文末】 ...

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、部门代码

1. import http from '@ohos.net.http';
3. import fs from '@ohos.file.fs';
4. import ReadOptions from "@ohos.file.fs"
5. import common from '@ohos.app.ability.common';
6. import buffer from '@ohos.buffer';
9. export namespace YouDaoDict {
11.   const BUFFER_FILE_PATH = '/you_dao_dict_cache.json';
13.   export type QueryResult = {
14.     source: string;
15.     pronunciation: {
16.       en?: string;
17.       us?: string;
18.     };
19.     meaning: Array<{
20.       position?: string;
21.       translation: string;
22.     }>;
23.     sentence: Array<{
24.       sentence: string;
25.       translation: string;
26.     }>;
27.   };
29.   let queryCache: Record<string, QueryResult> = undefined;
31.   async function loadLocalCache() {
32.     let context = getContext(this) as common.UIAbilityContext;
33.     let filePath = `${context.cacheDir}${BUFFER_FILE_PATH}`
34.     let file: fs.File;
35.     if (!await fs.access(filePath)) {
36.       file = await fs.open(filePath, fs.OpenMode.CREATE | fs.OpenMode.READ_WRITE);
37.       await fs.write(file.fd, '{}');
38.       await fs.fdatasync(file.fd);
39.       await fs.close(file);
40.     }
41.     queryCache = JSON.parse(await fs.readText(filePath, { encoding: 'UTF-8' }));
42.   }
44.   async function cacheQuery(word: string): Promise<QueryResult> {
45.     if (queryCache === undefined) await loadLocalCache();
46.     let result = queryCache[word];
47.     if (result !== undefined) return result
48.     return null;
49.   }
51.   async function cacheAdd(word: string, result: QueryResult): Promise<void> {
52.     queryCache[word] = result;
53.     let serialized = JSON.stringify(queryCache);
54.     let context = getContext(this) as common.UIAbilityContext;
55.     let filePath = `${context.cacheDir}${BUFFER_FILE_PATH}`
56.     let file = await fs.open(filePath, fs.OpenMode.WRITE_ONLY | fs.OpenMode.CREATE);
57.     await fs.write(file.fd, serialized);
58.     await fs.fsync(file.fd);
59.     await fs.close(file);
60.   }
62.   export async function query(word: string): Promise<QueryResult> {
63.     let result: QueryResult | null = await cacheQuery(word);
64.     if (result) return result;
65.     let httpReq = http.createHttp();
66.     let httpResponse = await new Promise<http.HttpResponse>((resolve, reject) => {
67.       httpReq.request(
68.         'https://dict.youdao.com/jsonapi_s?doctype=json&jsonversion=4',
69.         {
70.           method: http.RequestMethod.POST,
71.           header:{
72.             'Content-Type':'application/x-www-form-urlencoded'
73.           },
74.           extraData: `q=${word}`
75.         },
76.         (err, data) => {
77.           if (err !== undefined) reject(err);
78.           resolve(data)
79.         }
80.       )
81.     })
82.     let res = JSON.parse(httpResponse.result.toString());
83.     result = {
84.       source: word,
85.       pronunciation: {
86.         en: res['ec']['word']['ukphone'] as string,
87.         us: res['ec']['word']['usphone'] as string
88.       },
89.       meaning: [],
90.       sentence: []
91.     };
92.     (res['ec']['word']['trs'] as Array<{
93.       pos?: string;
94.       tran: string
95.     }>).forEach(elem => {
96.       result.meaning.push({ position: elem.pos, translation: elem.tran });
97.     });
98.     (res['blng_sents_part']['sentence-pair'] as Array<{
99.       sentence?: string;
100.       'sentence-translation': string
101.     }>).forEach(elem => {
102.       result.sentence.push({ sentence: elem.sentence, translation: elem['sentence-translation'] });
103.     })
105.     cacheAdd(word, result);
106.     return result;
107.   }
108. }

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三、源码

相关鸿蒙项目点此专栏

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