作者归档：beiyu

效果演示

代码结构

├──entry/src/main/ets                // 代码区
│  ├──common
│  │  ├──constansts
│  │  │  └──Constants.ets            // 常量类
│  │  └──utils
│  │     ├──FileUtil.ets             // 文件工具类
│  │     ├──HttpUtil.ets             // 网络请求
│  │     ├──Logger.ets               // Logger公共类
│  │     └──ToastUtil.ets            // Toast弹窗
│  ├──entryability
│  │  └──EntryAbility.ets            // 程序入口类
│  ├──pages
│  │  ├──MainPage.ets                // 新闻列表主页面
│  │  └──NewsEditPage.ets            // 新闻发布页面
│  ├──view
│  │  ├──FailureLayout.ets           // 请求失败布局
│  │  ├──LoadingLayout.ets           // 加载中布局
│  │  ├──LoadMoreLayout.ets          // 加载更多布局
│  │  ├──NewsItem.ets                // 新闻Item
│  │  ├──NewsList.ets                // 新闻列表
│  │  ├──NoMoreLayout.ets            // 没有更多数据布局
│  │  ├──RefreshLayout.ets           // 下拉刷新布局
│  │  └──UploadingLayout.ets         // 上传中布局
│  └──viewmodel
│     ├──GlobalContext.ets           // 全局变量管理
│     ├──NewsData.ets                // 新闻数据
│     ├──NewsTypeModel.ets           // 新闻类型
│     ├──NewsTypeViewModel.ets       // 新闻类型ViewModel
│     ├──NewsViewModel.ets           // 新闻列表ViewModel
│     ├──RefreshListViewModel.ets    // 刷新列表ViewModel
│     ├──RefreshLoadingClass.ets     // 刷新布局模型
│     └──ResponseResult.ets          // 网络请求数据模型
├──entry/src/main/resources          // 资源文件
└──HttpServerOfNews                  // 服务端代码

├──entry/src/main/ets // 代码区

│ ├──common

│ │ ├──constansts

│ │ │ └──Constants.ets // 常量类

│ │ └──utils

│ │ ├──FileUtil.ets // 文件工具类

│ │ ├──HttpUtil.ets // 网络请求

│ │ ├──Logger.ets // Logger公共类

│ │ └──ToastUtil.ets // Toast弹窗

│ ├──entryability

│ │ └──EntryAbility.ets // 程序入口类

│ ├──pages

│ │ ├──MainPage.ets // 新闻列表主页面

│ │ └──NewsEditPage.ets // 新闻发布页面

│ ├──view

│ │ ├──FailureLayout.ets // 请求失败布局

│ │ ├──LoadingLayout.ets // 加载中布局

│ │ ├──LoadMoreLayout.ets // 加载更多布局

│ │ ├──NewsItem.ets // 新闻Item

│ │ ├──NewsList.ets // 新闻列表

│ │ ├──NoMoreLayout.ets // 没有更多数据布局

│ │ ├──RefreshLayout.ets // 下拉刷新布局

│ │ └──UploadingLayout.ets // 上传中布局

│ └──viewmodel

│ ├──GlobalContext.ets // 全局变量管理

│ ├──NewsData.ets // 新闻数据

│ ├──NewsTypeModel.ets // 新闻类型

│ ├──NewsTypeViewModel.ets // 新闻类型ViewModel

│ ├──NewsViewModel.ets // 新闻列表ViewModel

│ ├──RefreshListViewModel.ets // 刷新列表ViewModel

│ ├──RefreshLoadingClass.ets // 刷新布局模型

│ └──ResponseResult.ets // 网络请求数据模型

├──entry/src/main/resources // 资源文件

└──HttpServerOfNews // 服务端代码

启动服务

$ cd HttpServerOfNews
$ npm install
$ npm start

$ cd HttpServerOfNews

$ npm install

$ npm start

代码

common

Constants.ets

export default class Constants {
  /**
   * The host address of the server.
   */
  static readonly SERVER: string = 'http://192.168.10.37:9588';
  /**
   * Get the news type.
   */
  static readonly GET_NEWS_TYPE: string = 'news/getNewsType';
  /**
   * Get the news list.
   */
  static readonly GET_NEWS_LIST: string = 'news/getNewsList';
  /**
   * Get the news list.
   */
  static readonly UPLOAD_NEWS: string = 'news/addNews';
  /**
   * Upload File
   */
  static readonly UPLOAD_FILE: string = '/files/upload';
  /**
   * UploadFile
   */
  static readonly IMAGE_PREFIX: string = '/images/';
  /**
   * url of NewsUploadPage
   */
  static readonly NEWS_EDIT_PAGE: string = 'pages/NewsEditPage'
  /**
   * The request success status code.
   */
  static readonly SERVER_CODE_SUCCESS: string = 'success';
  /**
   * The off set coefficient.
   */
  static readonly Y_OFF_SET_COEFFICIENT: number = 0.1;
  /**
   * The page size.
   */
  static readonly PAGE_SIZE: number = 10;
  /**
   * The refresh and load height.
   */
  static readonly CUSTOM_LAYOUT_HEIGHT: number = 70;
  /**
   * Gt tab data current page.
   */
  static readonly GET_TAB_DATA_CURRENT_PAGE: number = 1;
  /**
   * Http request success status code.
   */
  static readonly HTTP_CODE_200: number = 200;
  /**
   * The animation delay time.
   */
  static readonly DELAY_ANIMATION_DURATION: number = 300;
  /**
   * The delay time.
   */
  static readonly DELAY_TIME: number = 1000;
  /**
   * The animation duration.
   */
  static readonly ANIMATION_DURATION: number = 2000;
  /**
   * The http timeout duration.
   */
  static readonly HTTP_READ_TIMEOUT: number = 10000;
  /**
   * Content maxLine.
   */
  static readonly CONTENT_MAX_LINE: number = 3;
  /**
   * List space.
   */
  static readonly LIST_SPACE: number = 12;
  /**
   * Item img space.
   */
  static readonly ITEM_IMG_SPACE: number = 8;
  /**
   * Type font weight.
   */
  static readonly TYPE_FONT_WEIGHT: number = 700;
  /**
   * Title font weight.
   */
  static readonly TITLE_FONT_WEIGHT: number = 500;
  /**
   * Desc font weight.
   */
  static readonly DESC_FONT_WEIGHT: number = 400;
  /**
   * Type aspect ratio.
   */
  static readonly TYPE_ASPECT_RATIO: number = 2;
  /**
   * Desc opacity.
   */
  static readonly DESC_OPACITY: number = 0.6;
  /**
   * 100 percent.
   */
  static readonly FULL_PERCENT: string = '100%';
  /**
   * Divider width.
   */
  static readonly DIVIDER_WIDTH: string = '90%';
  /**
   * Release title.
   */
  static readonly RELEASE_TITLE: string = '新闻发布';
}

/**
 * The RefreshConstant constants.
 */
export const enum RefreshConstant {
  DELAY_PULL_DOWN_REFRESH = 50,
  CLOSE_PULL_DOWN_REFRESH_TIME = 150,
  DELAY_SHRINK_ANIMATION_TIME = 500
}

/**
 * The refresh state enum.
 */
export const enum RefreshState {
  DropDown = 0,
  Release = 1,
  Refreshing = 2,
  Success = 3,
  Fail = 4
}

/**
 * The newsList state enum.
 */
export const enum PageState {
  Loading = 0,
  Success = 1,
  Fail = 2
}

/**
 * The file upload state enum.
 */
export const enum UploadingState {
  COMPLETE = 'complete',
  FAIL = 'fail'
}

/**
 * The request method enum.
 */
export const enum RequestMethod {
  POST = 'POST',
  GET = 'GET'
}

/**
 * The request content type enum.
 */
export const enum ContentType {
  JSON = 'application/json',
  FORM = 'multipart/form-data'
}

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export default class Constants {

/**

* The host address of the server.

static readonly SERVER: string = 'http://192.168.10.37:9588';

/**

* Get the news type.

static readonly GET_NEWS_TYPE: string = 'news/getNewsType';

/**

* Get the news list.

static readonly GET_NEWS_LIST: string = 'news/getNewsList';

/**

* Get the news list.

static readonly UPLOAD_NEWS: string = 'news/addNews';

/**

* Upload File

static readonly UPLOAD_FILE: string = '/files/upload';

/**

* UploadFile

static readonly IMAGE_PREFIX: string = '/images/';

/**

* url of NewsUploadPage

static readonly NEWS_EDIT_PAGE: string = 'pages/NewsEditPage'

/**

* The request success status code.

static readonly SERVER_CODE_SUCCESS: string = 'success';

/**

* The off set coefficient.

static readonly Y_OFF_SET_COEFFICIENT: number = 0.1;

/**

* The page size.

static readonly PAGE_SIZE: number = 10;

/**

* The refresh and load height.

static readonly CUSTOM_LAYOUT_HEIGHT: number = 70;

/**

* Gt tab data current page.

static readonly GET_TAB_DATA_CURRENT_PAGE: number = 1;

/**

* Http request success status code.

static readonly HTTP_CODE_200: number = 200;

/**

* The animation delay time.

static readonly DELAY_ANIMATION_DURATION: number = 300;

/**

* The delay time.

static readonly DELAY_TIME: number = 1000;

/**

* The animation duration.

static readonly ANIMATION_DURATION: number = 2000;

/**

* The http timeout duration.

static readonly HTTP_READ_TIMEOUT: number = 10000;

/**

* Content maxLine.

static readonly CONTENT_MAX_LINE: number = 3;

/**

* List space.

static readonly LIST_SPACE: number = 12;

/**

* Item img space.

static readonly ITEM_IMG_SPACE: number = 8;

/**

* Type font weight.

static readonly TYPE_FONT_WEIGHT: number = 700;

/**

* Title font weight.

static readonly TITLE_FONT_WEIGHT: number = 500;

/**

* Desc font weight.

static readonly DESC_FONT_WEIGHT: number = 400;

/**

* Type aspect ratio.

static readonly TYPE_ASPECT_RATIO: number = 2;

/**

* Desc opacity.

static readonly DESC_OPACITY: number = 0.6;

/**

* 100 percent.

static readonly FULL_PERCENT: string = '100%';

/**

* Divider width.

static readonly DIVIDER_WIDTH: string = '90%';

/**

* Release title.

static readonly RELEASE_TITLE: string = '新闻发布';

}

/**

* The RefreshConstant constants.

export const enum RefreshConstant {

DELAY_PULL_DOWN_REFRESH = 50,

CLOSE_PULL_DOWN_REFRESH_TIME = 150,

DELAY_SHRINK_ANIMATION_TIME = 500

}

/**

* The refresh state enum.

export const enum RefreshState {

DropDown = 0,

Release = 1,

Refreshing = 2,

Success = 3,

Fail = 4

}

/**

* The newsList state enum.

export const enum PageState {

Loading = 0,

Success = 1,

Fail = 2

}

/**

* The file upload state enum.

export const enum UploadingState {

COMPLETE = 'complete',

FAIL = 'fail'

}

/**

* The request method enum.

export const enum RequestMethod {

POST = 'POST',

GET = 'GET'

}

/**

* The request content type enum.

export const enum ContentType {

JSON = 'application/json',

FORM = 'multipart/form-data'

}

utils/FileUtil.ets

import { fileIo } from '@kit.CoreFileKit';
import { request } from '@kit.BasicServicesKit';
import { picker } from '@kit.CoreFileKit';
import Constants, { ContentType, RequestMethod, UploadingState } from '../constants/Constants';
import ResponseResult from '../../viewmodel/ResponseResult';
import Logger from './Logger';
import { showToast } from './ToastUtil';

/**
 * PhotoViewPicker
 *
 * @returns uri The uri for the selected file.
 */
export async function fileSelect(): Promise<string> {
  let photoSelectOptions = new picker.PhotoSelectOptions();
  photoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.IMAGE_TYPE;
  photoSelectOptions.maxSelectNumber = 1;
  let photoPicker = new picker.PhotoViewPicker();
  try {
    let photoSelectResult = await photoPicker.select(photoSelectOptions);
    if (photoSelectResult && photoSelectResult.photoUris && photoSelectResult.photoUris.length > 0) {
      let imgUri = photoSelectResult.photoUris[0];
      if (imgUri.indexOf('media/Photo')<0) {
        showToast($r('app.string.prompt_select_img'));
        return '';
      }
      return photoSelectResult.photoUris[0];
    } else {
      return '';
    }
  } catch (err) {
    Logger.error('SelectedImage failed', JSON.stringify(err));
    return '';
  }
}

/**
 * Upload file.
 *
 * @param context Indicates the application BaseContext.
 * @param fileUri The local storage path of the file.
 * @returns the promise returned by the function.
 */
export function fileUpload(context: Context, fileUri: string): Promise<ResponseResult> {
  // Obtaining the Application File Path.
  let cacheDir = context.cacheDir;
  let imgName = fileUri.split('/').pop() + '.jpg';
  let dstPath = cacheDir + '/' + imgName;
  let url: string = Constants.SERVER + Constants.UPLOAD_FILE;
  let uploadRequestOptions: request.UploadConfig = {
    url: url,
    header: {
      'Content-Type': ContentType.FORM
    },
    method: RequestMethod.POST,
    files: [{
      filename: imgName,
      name: 'file',
      uri: 'internal://cache/' + imgName,
      type: 'jpg'
    }],
    data: []
  };

  let serverData = new ResponseResult();
  return new Promise((resolve: Function, reject: Function) => {
    try {
      // Copy the URI to the cacheDir directory and upload the file.
      let srcFile = fileIo.openSync(fileUri);
      let dstFile = fileIo.openSync(dstPath, fileIo.OpenMode.READ_WRITE | fileIo.OpenMode.CREATE);
      fileIo.copyFileSync(srcFile.fd, dstFile.fd);
      fileIo.closeSync(srcFile);
      fileIo.closeSync(dstFile);

      // Upload the file.
      request.uploadFile(context, uploadRequestOptions).then((data: request.UploadTask) => {
        data.on(UploadingState.COMPLETE, (result: Array<request.TaskState>) => {
          Logger.info('uploadFile success', JSON.stringify(result));
          if (result && result.length >= 1) {
            serverData.code = Constants.SERVER_CODE_SUCCESS;
            serverData.msg = result[0].message;
            serverData.data = Constants.IMAGE_PREFIX + result[0].path.split('/').pop();
            resolve(serverData);
          }
        });
        data.on(UploadingState.FAIL, (result: Array<request.TaskState>) => {
          Logger.info('uploadFile failed', JSON.stringify(result));
          if (result && result.length >= 1) {
            serverData.msg = $r('app.string.upload_error_message');
            reject(serverData);
          }
        })
      }).catch((err: Error) => {
        Logger.error('uploadFile failed', JSON.stringify(err));
        reject(serverData);
      });
    } catch (err) {
      Logger.error('uploadFile failed', JSON.stringify(err));
      reject(serverData);
    }
  })
}

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import { fileIo } from '@kit.CoreFileKit';

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

import { picker } from '@kit.CoreFileKit';

import Constants, { ContentType, RequestMethod, UploadingState } from '../constants/Constants';

import ResponseResult from '../../viewmodel/ResponseResult';

import Logger from './Logger';

import { showToast } from './ToastUtil';

/**

* PhotoViewPicker

* @returns uri The uri for the selected file.

export async function fileSelect(): Promise<string> {

let photoSelectOptions = new picker.PhotoSelectOptions();

photoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.IMAGE_TYPE;

photoSelectOptions.maxSelectNumber = 1;

let photoPicker = new picker.PhotoViewPicker();

try {

let photoSelectResult = await photoPicker.select(photoSelectOptions);

if (photoSelectResult && photoSelectResult.photoUris && photoSelectResult.photoUris.length > 0) {

let imgUri = photoSelectResult.photoUris[0];

if (imgUri.indexOf('media/Photo')<0) {

showToast($r('app.string.prompt_select_img'));

return '';

}

return photoSelectResult.photoUris[0];

} else {

return '';

}

} catch (err) {

Logger.error('SelectedImage failed', JSON.stringify(err));

return '';

}

/**

* Upload file.

* @param context Indicates the application BaseContext.

* @param fileUri The local storage path of the file.

* @returns the promise returned by the function.

export function fileUpload(context: Context, fileUri: string): Promise<ResponseResult> {

// Obtaining the Application File Path.

let cacheDir = context.cacheDir;

let imgName = fileUri.split('/').pop() + '.jpg';

let dstPath = cacheDir + '/' + imgName;

let url: string = Constants.SERVER + Constants.UPLOAD_FILE;

let uploadRequestOptions: request.UploadConfig = {

url: url,

header: {

'Content-Type': ContentType.FORM

method: RequestMethod.POST,

files: [{

filename: imgName,

name: 'file',

uri: 'internal://cache/' + imgName,

type: 'jpg'

}],

data: []

};

let serverData = new ResponseResult();

return new Promise((resolve: Function, reject: Function) => {

try {

// Copy the URI to the cacheDir directory and upload the file.

let srcFile = fileIo.openSync(fileUri);

let dstFile = fileIo.openSync(dstPath, fileIo.OpenMode.READ_WRITE | fileIo.OpenMode.CREATE);

fileIo.copyFileSync(srcFile.fd, dstFile.fd);

fileIo.closeSync(srcFile);

fileIo.closeSync(dstFile);

// Upload the file.

request.uploadFile(context, uploadRequestOptions).then((data: request.UploadTask) => {

data.on(UploadingState.COMPLETE, (result: Array<request.TaskState>) => {

Logger.info('uploadFile success', JSON.stringify(result));

if (result && result.length >= 1) {

serverData.code = Constants.SERVER_CODE_SUCCESS;

serverData.msg = result[0].message;

serverData.data = Constants.IMAGE_PREFIX + result[0].path.split('/').pop();

resolve(serverData);

}

});

data.on(UploadingState.FAIL, (result: Array<request.TaskState>) => {

Logger.info('uploadFile failed', JSON.stringify(result));

if (result && result.length >= 1) {

serverData.msg = $r('app.string.upload_error_message');

reject(serverData);

}

})

}).catch((err: Error) => {

Logger.error('uploadFile failed', JSON.stringify(err));

reject(serverData);

});

} catch (err) {

Logger.error('uploadFile failed', JSON.stringify(err));

reject(serverData);

}

})

}

utils/HttpUtil.ets


import { http } from '@kit.NetworkKit';
import { NewsData } from '../../viewmodel/NewsData';
import ResponseResult from '../../viewmodel/ResponseResult';
import Constants, { ContentType } from '../constants/Constants';

/**
 * Initiate an HTTP GET request to the specified URL.
 *
 * @param url URL for initiating an HTTP request.
 */
export function httpRequestGet(url: string) {
  return httpRequest(url, http.RequestMethod.GET);
}

/**
 * Initiate an HTTP POST request to the specified URL.
 *
 * @param url URL for initiating an HTTP request
 * @param newsData Additional data of the request
 * @returns
 */
export function httpRequestPost(url: string, newsData: NewsData) {
  return httpRequest(url, http.RequestMethod.POST, newsData);
}

/**
 * Initiates an HTTP request to a given URL.
 *
 * @param url URL for initiating an HTTP request
 * @param method Request method.
 * @param extraData Additional data of the request.
 * @returns Returns {@link ResponseResult}.
 */
function httpRequest(url: string, method: http.RequestMethod, params?: NewsData): Promise<ResponseResult> {
  let httpRequest = http.createHttp();
  let responseResult = httpRequest.request(url, {
    method: method,
    readTimeout: Constants.HTTP_READ_TIMEOUT,
    header: {
      'Content-Type': ContentType.JSON
    },
    connectTimeout: Constants.HTTP_READ_TIMEOUT,
    extraData: params
  });
  let serverData = new ResponseResult();
  // Processes the data and returns.
  return responseResult.then((value: http.HttpResponse) => {
    if (value.responseCode === Constants.HTTP_CODE_200) {
      // Obtains the returned data.
      let result = `${value.result}`;
      let resultJson: ResponseResult = JSON.parse(result);
      if (resultJson.code === Constants.SERVER_CODE_SUCCESS) {
        serverData.data = resultJson.data;
      }
      serverData.code = resultJson.code;
      serverData.msg = resultJson.msg;
    } else {
      serverData.msg = `${$r('app.string.http_error_message')}&${value.responseCode}`;
    }
    return serverData;
  }).catch(() => {
    serverData.msg = $r('app.string.http_error_message');
    return serverData;
  });
}

import { http } from '@kit.NetworkKit';

import { NewsData } from '../../viewmodel/NewsData';

import ResponseResult from '../../viewmodel/ResponseResult';

import Constants, { ContentType } from '../constants/Constants';

/**

* Initiate an HTTP GET request to the specified URL.

* @param url URL for initiating an HTTP request.

export function httpRequestGet(url: string) {

return httpRequest(url, http.RequestMethod.GET);

}

/**

* Initiate an HTTP POST request to the specified URL.

* @param url URL for initiating an HTTP request

* @param newsData Additional data of the request

* @returns

export function httpRequestPost(url: string, newsData: NewsData) {

return httpRequest(url, http.RequestMethod.POST, newsData);

}

/**

* Initiates an HTTP request to a given URL.

* @param url URL for initiating an HTTP request

* @param method Request method.

* @param extraData Additional data of the request.

* @returns Returns {@link ResponseResult}.

function httpRequest(url: string, method: http.RequestMethod, params?: NewsData): Promise<ResponseResult> {

let httpRequest = http.createHttp();

let responseResult = httpRequest.request(url, {

method: method,

readTimeout: Constants.HTTP_READ_TIMEOUT,

header: {

'Content-Type': ContentType.JSON

connectTimeout: Constants.HTTP_READ_TIMEOUT,

extraData: params

});

let serverData = new ResponseResult();

// Processes the data and returns.

return responseResult.then((value: http.HttpResponse) => {

if (value.responseCode === Constants.HTTP_CODE_200) {

// Obtains the returned data.

let result = `${value.result}`;

let resultJson: ResponseResult = JSON.parse(result);

if (resultJson.code === Constants.SERVER_CODE_SUCCESS) {

serverData.data = resultJson.data;

}

serverData.code = resultJson.code;

serverData.msg = resultJson.msg;

} else {

serverData.msg = `${$r('app.string.http_error_message')}&${value.responseCode}`;

}

return serverData;

}).catch(() => {

serverData.msg = $r('app.string.http_error_message');

return serverData;

});

}

utils/Logger.ets


import { hilog } from '@kit.PerformanceAnalysisKit';

const LOGGER_PREFIX: string = 'News Release';

class Logger {
  private domain: number;
  private prefix: string;

  // format Indicates the log format string.
  private format: string = '%{public}s, %{public}s';

  /**
   * constructor.
   *
   * @param prefix Identifies the log tag.
   * @param domain Indicates the service domain, which is a hexadecimal integer ranging from 0x0 to 0xFFFFF
   * @param args Indicates the log parameters.
   */
  constructor(prefix: string = '', domain: number = 0xFF00) {
    this.prefix = prefix;
    this.domain = domain;
  }

  debug(...args: string[]): void {
    hilog.debug(this.domain, this.prefix, this.format, args);
  }

  info(...args: string[]): void {
    hilog.info(this.domain, this.prefix, this.format, args);
  }

  warn(...args: string[]): void {
    hilog.warn(this.domain, this.prefix, this.format, args);
  }

  error(...args: string[]): void {
    hilog.error(this.domain, this.prefix, this.format, args);
  }
}

export default new Logger(LOGGER_PREFIX);

import { hilog } from '@kit.PerformanceAnalysisKit';

const LOGGER_PREFIX: string = 'News Release';

class Logger {

private domain: number;

private prefix: string;

// format Indicates the log format string.

private format: string = '%{public}s, %{public}s';

/**

* constructor.

* @param prefix Identifies the log tag.

* @param domain Indicates the service domain, which is a hexadecimal integer ranging from 0x0 to 0xFFFFF

* @param args Indicates the log parameters.

constructor(prefix: string = '', domain: number = 0xFF00) {

this.prefix = prefix;

this.domain = domain;

}

debug(...args: string[]): void {

hilog.debug(this.domain, this.prefix, this.format, args);

}

info(...args: string[]): void {

hilog.info(this.domain, this.prefix, this.format, args);

}

warn(...args: string[]): void {

hilog.warn(this.domain, this.prefix, this.format, args);

}

error(...args: string[]): void {

hilog.error(this.domain, this.prefix, this.format, args);

}

export default new Logger(LOGGER_PREFIX);

utils/ToastUtil.ets


import { promptAction } from '@kit.ArkUI';
import Constants from '../constants/Constants';

export function showToast(msg: string | Resource) {
  promptAction.showToast({
    message: msg,
    duration: Constants.ANIMATION_DURATION
  });
}

import { promptAction } from '@kit.ArkUI';

import Constants from '../constants/Constants';

export function showToast(msg: string | Resource) {

promptAction.showToast({

message: msg,

duration: Constants.ANIMATION_DURATION

});

}

entryability

EntryAbility.ets


import { abilityAccessCtrl, AbilityConstant, UIAbility, Want } from '@kit.AbilityKit';
import { window } from '@kit.ArkUI';
import Logger from '../common/utils/Logger';
import { GlobalContext } from '../viewmodel/GlobalContext';


export default class EntryAbility extends UIAbility {
  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
    Logger.info('testTag', '%{public}s', 'Ability onCreate');
    GlobalContext.getContext().setObject('abilityWant', want);
  }

  onDestroy(): void | Promise<void> {
    Logger.info('testTag', '%{public}s', 'Ability onDestroy');
  }

  onWindowStageCreate(windowStage: window.WindowStage): void {
    // Main window is created, set main page for this ability.
    Logger.info('testTag', '%{public}s', 'Ability onWindowStageCreate');

    this.requestPermissions();
    windowStage.loadContent('pages/MainPage', (err, data) => {
      if (err.code) {
        Logger.error('testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
        return;
      }
      Logger.info('testTag', 'Succeeded in loading the content. Data: %{public}s', JSON.stringify(data) ?? '');
    });
  }

  onWindowStageDestroy(): void {
    // Main window is destroyed, release UI related resources.
    Logger.info('testTag', '%{public}s', 'Ability onWindowStageDestroy');
  }

  onForeground(): void {
    // Ability has brought to foreground.
    GlobalContext.getContext().setObject('isBackRouter', false);
    Logger.info('testTag', '%{public}s', 'Ability onForeground');
  }

  onBackground(): void {
    // Ability has back to background.
    Logger.info('testTag', '%{public}s', 'Ability onBackground');
  }

  private requestPermissions() {
    let atManager = abilityAccessCtrl.createAtManager();
    atManager.requestPermissionsFromUser(this.context, ['ohos.permission.READ_MEDIA'])
      .then((data) => {
        Logger.info('testTag', '%{public}s', `request permission data result: ${data}`);
      })
      .catch((err: Error) => {
        Logger.error('testTag', '%{public}s', `fail to request permission error:${err}`)
      });
  }
}

import { abilityAccessCtrl, AbilityConstant, UIAbility, Want } from '@kit.AbilityKit';

import { window } from '@kit.ArkUI';

import Logger from '../common/utils/Logger';

import { GlobalContext } from '../viewmodel/GlobalContext';

export default class EntryAbility extends UIAbility {

onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {

Logger.info('testTag', '%{public}s', 'Ability onCreate');

GlobalContext.getContext().setObject('abilityWant', want);

}

onDestroy(): void | Promise<void> {

Logger.info('testTag', '%{public}s', 'Ability onDestroy');

}

onWindowStageCreate(windowStage: window.WindowStage): void {

// Main window is created, set main page for this ability.

Logger.info('testTag', '%{public}s', 'Ability onWindowStageCreate');

this.requestPermissions();

windowStage.loadContent('pages/MainPage', (err, data) => {

if (err.code) {

Logger.error('testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');

return;

}

Logger.info('testTag', 'Succeeded in loading the content. Data: %{public}s', JSON.stringify(data) ?? '');

});

}

onWindowStageDestroy(): void {

// Main window is destroyed, release UI related resources.

Logger.info('testTag', '%{public}s', 'Ability onWindowStageDestroy');

}

onForeground(): void {

// Ability has brought to foreground.

GlobalContext.getContext().setObject('isBackRouter', false);

Logger.info('testTag', '%{public}s', 'Ability onForeground');

}

onBackground(): void {

// Ability has back to background.

Logger.info('testTag', '%{public}s', 'Ability onBackground');

}

private requestPermissions() {

let atManager = abilityAccessCtrl.createAtManager();

atManager.requestPermissionsFromUser(this.context, ['ohos.permission.READ_MEDIA'])

.then((data) => {

Logger.info('testTag', '%{public}s', `request permission data result: ${data}`);

})

.catch((err: Error) => {

Logger.error('testTag', '%{public}s', `fail to request permission error:${err}`)

});

}

pages

MainPage.ets


import Constants from '../common/constants/Constants';
import NewsList from '../view/NewsList';
import { router } from '@kit.ArkUI';
import NewsTypeViewModel from '../viewmodel/NewsTypeViewModel';
import NewsTypeBean from '../viewmodel/NewsTypeModel';
import { GlobalContext } from '../viewmodel/GlobalContext';

/**
 * MainPage
 */
@Entry
@Component
struct MainPage {
  @State tabBarArray: NewsTypeBean[] = NewsTypeViewModel.getDefaultTypeList();
  @State currentIndex: number = 0;

  @Builder
  TabBuilder(index: number) {
    Column() {
      Text(this.tabBarArray[index].name)
        .height(Constants.FULL_PERCENT)
        .fontSize(this.currentIndex === index ? $r('app.float.bar_selected_font') : $r('app.float.bar_normal_font'))
        .fontWeight(this.currentIndex === index ? Constants.TYPE_FONT_WEIGHT : Constants.DESC_FONT_WEIGHT)
        .fontColor($r('app.color.title_color'))
    }
    .padding({ left: $r('app.float.normal_padding'), right: $r('app.float.normal_padding') })
    .margin({
      left: index === 0 ? $r('app.float.common_padding') : 0,
      right: index === this.tabBarArray.length - 1 ? $r('app.float.common_padding') : 0
    })
  }

  aboutToAppear() {
    // Request news category.
    NewsTypeViewModel.getNewsTypeList().then((typeList: NewsTypeBean[]) => {
      this.tabBarArray = typeList;
    });
  }

  onPageShow() {
    if (GlobalContext.getContext().getObject('isBackRouter') === true) {
      GlobalContext.getContext().setObject('isBackRouter', false);
      let tempIndex = this.currentIndex;
      this.currentIndex = -1;
      this.currentIndex = tempIndex;
    }
  }

  build() {
    Stack() {
      Tabs() {
        ForEach(this.tabBarArray, (tabsItem: NewsTypeBean, index?: number) => {
          TabContent() {
            NewsList({ index, currentIndex: $currentIndex })
          }
          .tabBar(this.TabBuilder(tabsItem.id))
        }, (tabsItem: NewsTypeBean) => JSON.stringify(tabsItem));
      }
      .barHeight($r('app.float.nav_height'))
      .height(Constants.FULL_PERCENT)
      .barMode(BarMode.Scrollable)
      .onChange((index: number) => {
        this.currentIndex = index;
      })
      .vertical(false)

      Image($r('app.media.ic_add'))
        .width($r('app.float.btn_size'))
        .height($r('app.float.btn_size'))
        .margin({ bottom: $r('app.float.btn_margin'), right: $r('app.float.btn_margin') })
        .onClick(() => {
          router.pushUrl({ url: 'pages/NewsAddPage' });
        })
    }
    .width(Constants.FULL_PERCENT)
    .height(Constants.FULL_PERCENT)
    .alignContent(Alignment.BottomEnd)
    .backgroundColor($r('app.color.listColor'))
  }
}

import Constants from '../common/constants/Constants';

import NewsList from '../view/NewsList';

import { router } from '@kit.ArkUI';

import NewsTypeViewModel from '../viewmodel/NewsTypeViewModel';

import NewsTypeBean from '../viewmodel/NewsTypeModel';

import { GlobalContext } from '../viewmodel/GlobalContext';

/**

* MainPage

@Entry

@Component

struct MainPage {

@State tabBarArray: NewsTypeBean[] = NewsTypeViewModel.getDefaultTypeList();

@State currentIndex: number = 0;

@Builder

TabBuilder(index: number) {

Column() {

Text(this.tabBarArray[index].name)

.height(Constants.FULL_PERCENT)

.fontSize(this.currentIndex === index ? $r('app.float.bar_selected_font') : $r('app.float.bar_normal_font'))

.fontWeight(this.currentIndex === index ? Constants.TYPE_FONT_WEIGHT : Constants.DESC_FONT_WEIGHT)

.fontColor($r('app.color.title_color'))

}

.padding({ left: $r('app.float.normal_padding'), right: $r('app.float.normal_padding') })

.margin({

left: index === 0 ? $r('app.float.common_padding') : 0,

right: index === this.tabBarArray.length - 1 ? $r('app.float.common_padding') : 0

})

}

aboutToAppear() {

// Request news category.

NewsTypeViewModel.getNewsTypeList().then((typeList: NewsTypeBean[]) => {

this.tabBarArray = typeList;

});

}

onPageShow() {

if (GlobalContext.getContext().getObject('isBackRouter') === true) {

GlobalContext.getContext().setObject('isBackRouter', false);

let tempIndex = this.currentIndex;

this.currentIndex = -1;

this.currentIndex = tempIndex;

}

build() {

Stack() {

Tabs() {

ForEach(this.tabBarArray, (tabsItem: NewsTypeBean, index?: number) => {

TabContent() {

NewsList({ index, currentIndex: $currentIndex })

}

.tabBar(this.TabBuilder(tabsItem.id))

}, (tabsItem: NewsTypeBean) => JSON.stringify(tabsItem));

}

.barHeight($r('app.float.nav_height'))

.height(Constants.FULL_PERCENT)

.barMode(BarMode.Scrollable)

.onChange((index: number) => {

this.currentIndex = index;

})

.vertical(false)

Image($r('app.media.ic_add'))

.width($r('app.float.btn_size'))

.height($r('app.float.btn_size'))

.margin({ bottom: $r('app.float.btn_margin'), right: $r('app.float.btn_margin') })

.onClick(() => {

router.pushUrl({ url: 'pages/NewsAddPage' });

})

}

.width(Constants.FULL_PERCENT)

.height(Constants.FULL_PERCENT)

.alignContent(Alignment.BottomEnd)

.backgroundColor($r('app.color.listColor'))

}

NewsAddPage.ets

import { fileSelect, fileUpload } from '../common/utils/FileUtil'
import Logger from '../common/utils/Logger'
import Constants from '../common/constants/Constants'
import { showToast } from '../common/utils/ToastUtil'
import ResponseResult from '../viewmodel/ResponseResult'
import { NewsData, NewsFile } from '../viewmodel/NewsData'
import NewsViewModel from '../viewmodel/NewsViewModel'
import { GlobalContext } from '../viewmodel/GlobalContext'
import { router } from '@kit.ArkUI'

@Entry
@Component
struct NewsAddPage {
  title: string = ''
  content: string = ''
  @State imageUri: string = ''
  @State isUploading: boolean = false

  selectImage() {
    Logger.info('selectImage')
    fileSelect().then((uri: string) => {
      Logger.info(uri)
      this.imageUri = uri || ''
    })
  }

  uploadNewsData() {
    if (this.title === '') {
      showToast($r('app.string.prompt_no_title'))
      return
    }
    if (this.content === '') {
      showToast($r('app.string.prompt_no_content'))
      return
    }
    if (this.imageUri === '') {
      showToast($r('app.string.prompt_no_file'))
      return
    }

    this.isUploading = true
    let serverData = fileUpload(getContext(this), this.imageUri)
    serverData.then((data: ResponseResult) => {
      let imageUrl = data.data

      let newsFile = new NewsFile()
      newsFile.id = 0
      newsFile.url = imageUrl
      newsFile.type = 0
      newsFile.newsId = 0

      let newsData: NewsData = new NewsData()
      newsData.title = this.title
      newsData.content = this.content
      newsData.imagesUrl = [newsFile]

      NewsViewModel.uploadNews(newsData).then(() => {
        this.isUploading = false
        GlobalContext.getContext().setObject('isBackRouter', true)
        router.back()
      }).catch(() => {
        this.isUploading = false
        showToast($r('app.string.upload_error_message'))
      })
    }).catch(() => {
      this.isUploading = false
      showToast($r('app.string.upload_error_message'))
    })
  }

  build() {
    Stack() {
      Navigation() {
        Column() {
          Column() {
            TextInput({ placeholder: $r('app.string.title_default_text') })
              .textInputExtend()
              .onChange((value: string) => {
                this.title = value;
              })

            Divider()
              .dividerExtend()

            TextArea({ placeholder: $r('app.string.content_default_text') })
              .textAreaExtend()
              .onChange((value: string) => {
                this.content = value
              })

            Scroll() {
              Row() {
                Image(this.imageUri ? this.imageUri : $r('app.media.ic_add_pic'))
                  .addImageExtend()
                  .onClick(() => this.selectImage())
              }
              .imageRowExtend()
            }
            .scrollExtend()
          }
          .topColumnExtend()

          Button($r('app.string.release_btn'))
            .releaseButtonExtend()
            .onClick(() => this.uploadNewsData())
        }
        .mainColumnExtend()

      }
      .navigationExtend()
    }
  }
}

@Extend(Navigation)
function navigationExtend() {
  .height(Constants.FULL_PERCENT)
  .title(Constants.RELEASE_TITLE)
  .titleMode(NavigationTitleMode.Mini)
  .backgroundColor($r('app.color.listColor'))
}

@Extend(Column)
function mainColumnExtend() {
  .height(Constants.FULL_PERCENT)
  .justifyContent(FlexAlign.SpaceBetween)
  .padding({
    left: $r('app.float.common_padding'),
    right: $r('app.float.common_padding'),
    bottom: $r('app.float.common_padding')
  })
}

@Extend(Column)
function topColumnExtend() {
  .borderRadius($r('app.float.edit_view_radius'))
  .backgroundColor(Color.White)
  .width(Constants.FULL_PERCENT)
}

@Extend(TextInput)
function textInputExtend() {
  .fontSize($r('app.float.title_font'))
  .placeholderFont({ size: $r('app.float.title_font') })
  .margin({ top: $r('app.float.common_padding') })
  .fontColor($r('app.color.title_color'))
  .backgroundColor(Color.White)
  .width(Constants.FULL_PERCENT)
  .height($r('app.float.input_height'))
}

@Extend(Divider)
function dividerExtend() {
  .opacity($r('app.float.divider_opacity'))
  .color($r('app.color.title_color'))
  .width(Constants.DIVIDER_WIDTH)
}

@Extend(TextArea)
function textAreaExtend() {
  .placeholderFont({ size: $r('app.float.title_font') })
  .fontColor($r('app.color.title_color'))
  .height($r('app.float.area_height'))
  .fontSize($r('app.float.title_font'))
  .margin({ top: $r('app.float.normal_padding') })
  .backgroundColor(Color.White)
}

@Extend(Scroll)
function scrollExtend() {
  .width(Constants.FULL_PERCENT)
  .align(Alignment.Start)
  .scrollable(ScrollDirection.Horizontal)
}

@Extend(Row)
function imageRowExtend() {
  .padding($r('app.float.common_padding'))
}

@Extend(Image)
function addImageExtend() {
  .width($r('app.float.img_size'))
  .height($r('app.float.img_size'))
  .objectFit(ImageFit.Cover)
}

@Extend(Button)
function releaseButtonExtend() {
  .fontSize($r('app.float.title_font'))
  .height($r('app.float.release_btn_height'))
  .width($r('app.float.release_btn_width'))
  .margin({ bottom: $r('app.float.common_padding') })
}

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import { fileSelect, fileUpload } from '../common/utils/FileUtil'

import Logger from '../common/utils/Logger'

import Constants from '../common/constants/Constants'

import { showToast } from '../common/utils/ToastUtil'

import ResponseResult from '../viewmodel/ResponseResult'

import { NewsData, NewsFile } from '../viewmodel/NewsData'

import NewsViewModel from '../viewmodel/NewsViewModel'

import { GlobalContext } from '../viewmodel/GlobalContext'

import { router } from '@kit.ArkUI'

@Entry

@Component

struct NewsAddPage {

title: string = ''

content: string = ''

@State imageUri: string = ''

@State isUploading: boolean = false

selectImage() {

Logger.info('selectImage')

fileSelect().then((uri: string) => {

Logger.info(uri)

this.imageUri = uri || ''

})

}

uploadNewsData() {

if (this.title === '') {

showToast($r('app.string.prompt_no_title'))

return

}

if (this.content === '') {

showToast($r('app.string.prompt_no_content'))

return

}

if (this.imageUri === '') {

showToast($r('app.string.prompt_no_file'))

return

}

this.isUploading = true

let serverData = fileUpload(getContext(this), this.imageUri)

serverData.then((data: ResponseResult) => {

let imageUrl = data.data

let newsFile = new NewsFile()

newsFile.id = 0

newsFile.url = imageUrl

newsFile.type = 0

newsFile.newsId = 0

let newsData: NewsData = new NewsData()

newsData.title = this.title

newsData.content = this.content

newsData.imagesUrl = [newsFile]

NewsViewModel.uploadNews(newsData).then(() => {

this.isUploading = false

GlobalContext.getContext().setObject('isBackRouter', true)

router.back()

}).catch(() => {

this.isUploading = false

showToast($r('app.string.upload_error_message'))

})

}).catch(() => {

this.isUploading = false

showToast($r('app.string.upload_error_message'))

})

}

build() {

Stack() {

Navigation() {

Column() {

TextInput({ placeholder: $r('app.string.title_default_text') })

.textInputExtend()

.onChange((value: string) => {

this.title = value;

})

Divider()

.dividerExtend()

TextArea({ placeholder: $r('app.string.content_default_text') })

.textAreaExtend()

.onChange((value: string) => {

this.content = value

})

Scroll() {

Row() {

Image(this.imageUri ? this.imageUri : $r('app.media.ic_add_pic'))

.addImageExtend()

.onClick(() => this.selectImage())

}

.imageRowExtend()

}

.scrollExtend()

}

.topColumnExtend()

Button($r('app.string.release_btn'))

.releaseButtonExtend()

.onClick(() => this.uploadNewsData())

}

.mainColumnExtend()

}

.navigationExtend()

}

@Extend(Navigation)

function navigationExtend() {

.height(Constants.FULL_PERCENT)

.title(Constants.RELEASE_TITLE)

.titleMode(NavigationTitleMode.Mini)

.backgroundColor($r('app.color.listColor'))

}

@Extend(Column)

function mainColumnExtend() {

.height(Constants.FULL_PERCENT)

.justifyContent(FlexAlign.SpaceBetween)

.padding({

left: $r('app.float.common_padding'),

right: $r('app.float.common_padding'),

bottom: $r('app.float.common_padding')

})

}

@Extend(Column)

function topColumnExtend() {

.borderRadius($r('app.float.edit_view_radius'))

.backgroundColor(Color.White)

.width(Constants.FULL_PERCENT)

}

@Extend(TextInput)

function textInputExtend() {

.fontSize($r('app.float.title_font'))

.placeholderFont({ size: $r('app.float.title_font') })

.margin({ top: $r('app.float.common_padding') })

.fontColor($r('app.color.title_color'))

.backgroundColor(Color.White)

.width(Constants.FULL_PERCENT)

.height($r('app.float.input_height'))

}

@Extend(Divider)

function dividerExtend() {

.opacity($r('app.float.divider_opacity'))

.color($r('app.color.title_color'))

.width(Constants.DIVIDER_WIDTH)

}

@Extend(TextArea)

function textAreaExtend() {

.placeholderFont({ size: $r('app.float.title_font') })

.fontColor($r('app.color.title_color'))

.height($r('app.float.area_height'))

.fontSize($r('app.float.title_font'))

.margin({ top: $r('app.float.normal_padding') })

.backgroundColor(Color.White)

}

@Extend(Scroll)

function scrollExtend() {

.width(Constants.FULL_PERCENT)

.align(Alignment.Start)

.scrollable(ScrollDirection.Horizontal)

}

@Extend(Row)

function imageRowExtend() {

.padding($r('app.float.common_padding'))

}

@Extend(Image)

function addImageExtend() {

.width($r('app.float.img_size'))

.height($r('app.float.img_size'))

.objectFit(ImageFit.Cover)

}

@Extend(Button)

function releaseButtonExtend() {

.fontSize($r('app.float.title_font'))

.height($r('app.float.release_btn_height'))

.width($r('app.float.release_btn_width'))

.margin({ bottom: $r('app.float.common_padding') })

}

NewEditPage.ets


import { router } from '@kit.ArkUI';
import Constants from '../common/constants/Constants';
import { fileSelect, fileUpload } from '../common/utils/FileUtil';
import { NewsFile, NewsData } from '../viewmodel/NewsData';
import NewsViewModel from '../viewmodel/NewsViewModel';
import { showToast } from '../common/utils/ToastUtil';
import UploadingLayout from '../view/UploadingLayout';
import ResponseResult from '../viewmodel/ResponseResult';
import { GlobalContext } from '../viewmodel/GlobalContext';

/**
 * NewsEditPage.
 */
@Entry
@Component
struct NewsEditPage {
  title: string = '';
  content: string = '';
  @State imageUri: string = '';
  @State isUploading: boolean = false;

  selectImage() {
    fileSelect().then((uri: string) => {
      this.imageUri = uri || '';
    });
  }

  uploadNewsData() {
    if (this.title === '') {
      showToast($r('app.string.prompt_no_title'));
      return;
    }
    if (this.content === '') {
      showToast($r('app.string.prompt_no_content'));
      return;
    }
    if (this.imageUri === '') {
      showToast($r('app.string.prompt_no_file'));
      return;
    }
    this.isUploading = true;
    let serverData = fileUpload(getContext(this), this.imageUri);
    serverData.then((data: ResponseResult) => {
      let imageUrl = data.data;
      let newsFile = new NewsFile();
      newsFile.id = 0;
      newsFile.url = imageUrl;
      newsFile.type = 0;
      newsFile.newsId = 0;
      let newsData: NewsData = new NewsData();
      newsData.title = this.title;
      newsData.content = this.content;
      newsData.imagesUrl = [newsFile];
      NewsViewModel.uploadNews(newsData).then(() => {
        this.isUploading = false;
        GlobalContext.getContext().setObject('isBackRouter', true);
        router.back();
      }).catch(() => {
        this.isUploading = false;
        showToast($r('app.string.upload_error_message'));
      });
    }).catch(() => {
      this.isUploading = false;
      showToast($r('app.string.upload_error_message'));
    });
  }

  build() {
    Stack() {
      Navigation() {
        Column() {
          Column() {
            TextInput({ placeholder: $r('app.string.title_default_text') })
              .fontSize($r('app.float.title_font'))
              .placeholderFont({ size: $r('app.float.title_font') })
              .margin({ top: $r('app.float.common_padding') })
              .fontColor($r('app.color.title_color'))
              .backgroundColor(Color.White)
              .onChange((value: string) => {
                this.title = value;
              })
              .width(Constants.FULL_PERCENT)
              .height($r('app.float.input_height'))
            Divider()
              .opacity($r('app.float.divider_opacity'))
              .color($r('app.color.title_color'))
              .width(Constants.DIVIDER_WIDTH)
            TextArea({ placeholder: $r('app.string.content_default_text') })
              .placeholderFont({ size: $r('app.float.title_font') })
              .fontColor($r('app.color.title_color'))
              .height($r('app.float.area_height'))
              .fontSize($r('app.float.title_font'))
              .margin({ top: $r('app.float.normal_padding') })
              .backgroundColor(Color.White)
              .onChange((value: string) => {
                this.content = value;
              })
            Scroll() {
              Row() {
                Image(this.imageUri ? this.imageUri : $r('app.media.ic_add_pic'))
                  .width($r('app.float.img_size'))
                  .height($r('app.float.img_size'))
                  .objectFit(ImageFit.Cover)
                  .onClick(() => this.selectImage())
              }
              .padding($r('app.float.common_padding'))
            }
            .width(Constants.FULL_PERCENT)
            .scrollable(ScrollDirection.Horizontal)
            .align(Alignment.Start)
          }
          .borderRadius($r('app.float.edit_view_radius'))
          .backgroundColor(Color.White)
          .width(Constants.FULL_PERCENT)

          Button($r('app.string.release_btn'))
            .fontSize($r('app.float.title_font'))
            .height($r('app.float.release_btn_height'))
            .width($r('app.float.release_btn_width'))
            .margin({ bottom: $r('app.float.common_padding') })
            .onClick(() => this.uploadNewsData())
        }
        .padding({
          left: $r('app.float.common_padding'),
          right: $r('app.float.common_padding'),
          bottom: $r('app.float.common_padding')
        })
        .height(Constants.FULL_PERCENT)
        .justifyContent(FlexAlign.SpaceBetween)
      }
      .height(Constants.FULL_PERCENT)
      .title(Constants.RELEASE_TITLE)
      .titleMode(NavigationTitleMode.Mini)
      .backgroundColor($r('app.color.listColor'))

      if (this.isUploading) {
        UploadingLayout()
      }
    }
  }
}

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import { router } from '@kit.ArkUI';

import Constants from '../common/constants/Constants';

import { fileSelect, fileUpload } from '../common/utils/FileUtil';

import { NewsFile, NewsData } from '../viewmodel/NewsData';

import NewsViewModel from '../viewmodel/NewsViewModel';

import { showToast } from '../common/utils/ToastUtil';

import UploadingLayout from '../view/UploadingLayout';

import ResponseResult from '../viewmodel/ResponseResult';

import { GlobalContext } from '../viewmodel/GlobalContext';

/**

* NewsEditPage.

@Entry

@Component

struct NewsEditPage {

title: string = '';

content: string = '';

@State imageUri: string = '';

@State isUploading: boolean = false;

selectImage() {

fileSelect().then((uri: string) => {

this.imageUri = uri || '';

});

}

uploadNewsData() {

if (this.title === '') {

showToast($r('app.string.prompt_no_title'));

return;

}

if (this.content === '') {

showToast($r('app.string.prompt_no_content'));

return;

}

if (this.imageUri === '') {

showToast($r('app.string.prompt_no_file'));

return;

}

this.isUploading = true;

let serverData = fileUpload(getContext(this), this.imageUri);

serverData.then((data: ResponseResult) => {

let imageUrl = data.data;

let newsFile = new NewsFile();

newsFile.id = 0;

newsFile.url = imageUrl;

newsFile.type = 0;

newsFile.newsId = 0;

let newsData: NewsData = new NewsData();

newsData.title = this.title;

newsData.content = this.content;

newsData.imagesUrl = [newsFile];

NewsViewModel.uploadNews(newsData).then(() => {

this.isUploading = false;

GlobalContext.getContext().setObject('isBackRouter', true);

router.back();

}).catch(() => {

this.isUploading = false;

showToast($r('app.string.upload_error_message'));

});

}).catch(() => {

this.isUploading = false;

showToast($r('app.string.upload_error_message'));

});

}

build() {

Stack() {

Navigation() {

Column() {

TextInput({ placeholder: $r('app.string.title_default_text') })

.fontSize($r('app.float.title_font'))

.placeholderFont({ size: $r('app.float.title_font') })

.margin({ top: $r('app.float.common_padding') })

.fontColor($r('app.color.title_color'))

.backgroundColor(Color.White)

.onChange((value: string) => {

this.title = value;

})

.width(Constants.FULL_PERCENT)

.height($r('app.float.input_height'))

Divider()

.opacity($r('app.float.divider_opacity'))

.color($r('app.color.title_color'))

.width(Constants.DIVIDER_WIDTH)

TextArea({ placeholder: $r('app.string.content_default_text') })

.placeholderFont({ size: $r('app.float.title_font') })

.fontColor($r('app.color.title_color'))

.height($r('app.float.area_height'))

.fontSize($r('app.float.title_font'))

.margin({ top: $r('app.float.normal_padding') })

.backgroundColor(Color.White)

.onChange((value: string) => {

this.content = value;

})

Scroll() {

Row() {

Image(this.imageUri ? this.imageUri : $r('app.media.ic_add_pic'))

.width($r('app.float.img_size'))

.height($r('app.float.img_size'))

.objectFit(ImageFit.Cover)

.onClick(() => this.selectImage())

}

.padding($r('app.float.common_padding'))

}

.width(Constants.FULL_PERCENT)

.scrollable(ScrollDirection.Horizontal)

.align(Alignment.Start)

}

.borderRadius($r('app.float.edit_view_radius'))

.backgroundColor(Color.White)

.width(Constants.FULL_PERCENT)

Button($r('app.string.release_btn'))

.fontSize($r('app.float.title_font'))

.height($r('app.float.release_btn_height'))

.width($r('app.float.release_btn_width'))

.margin({ bottom: $r('app.float.common_padding') })

.onClick(() => this.uploadNewsData())

}

.padding({

left: $r('app.float.common_padding'),

right: $r('app.float.common_padding'),

bottom: $r('app.float.common_padding')

})

.height(Constants.FULL_PERCENT)

.justifyContent(FlexAlign.SpaceBetween)

}

.height(Constants.FULL_PERCENT)

.title(Constants.RELEASE_TITLE)

.titleMode(NavigationTitleMode.Mini)

.backgroundColor($r('app.color.listColor'))

if (this.isUploading) {

UploadingLayout()

}

view

FailureLayout.ets


import Constants from '../common/constants/Constants';

@Component
export default struct FailureLayout {
  reloadAction = () => {};

  build() {
    Column() {
      Image($r('app.media.ic_none'))
        .height($r('app.float.no_data_img_size'))
        .width($r('app.float.no_data_img_size'))
      Text($r('app.string.page_none_msg'))
        .opacity($r('app.float.no_data_opacity'))
        .fontSize($r('app.float.title_font'))
        .fontColor($r('app.color.title_color'))
        .margin({ top: $r('app.float.common_padding') })
      Text($r('app.string.click_reload'))
        .opacity($r('app.float.no_data_opacity'))
        .fontSize($r('app.float.title_font'))
        .fontColor($r('app.color.color_index'))
        .padding($r('app.float.common_padding'))
        .onClick(this.reloadAction)
    }
    .width(Constants.FULL_PERCENT)
    .height(Constants.FULL_PERCENT)
    .justifyContent(FlexAlign.Center)
  }
}

import Constants from '../common/constants/Constants';

@Component

export default struct FailureLayout {

reloadAction = () => {};

build() {

Column() {

Image($r('app.media.ic_none'))

.height($r('app.float.no_data_img_size'))

.width($r('app.float.no_data_img_size'))

Text($r('app.string.page_none_msg'))

.opacity($r('app.float.no_data_opacity'))

.fontSize($r('app.float.title_font'))

.fontColor($r('app.color.title_color'))

.margin({ top: $r('app.float.common_padding') })

Text($r('app.string.click_reload'))

.opacity($r('app.float.no_data_opacity'))

.fontSize($r('app.float.title_font'))

.fontColor($r('app.color.color_index'))

.padding($r('app.float.common_padding'))

.onClick(this.reloadAction)

}

.width(Constants.FULL_PERCENT)

.height(Constants.FULL_PERCENT)

.justifyContent(FlexAlign.Center)

}

LoadingLayout.ets


import Constants from '../common/constants/Constants';

@Component
export default struct LoadingLayout {
  build() {
    Row() {
      Image($r('app.media.ic_pull_up_load'))
        .width($r('app.float.refresh_img_size'))
        .height($r('app.float.refresh_img_size'))
      Text($r('app.string.pull_up_load_text'))
        .margin({ left: $r('app.float.normal_padding') })
        .fontSize($r('app.float.title_font'))
        .textAlign(TextAlign.Center)
    }
    .width(Constants.FULL_PERCENT)
    .height(Constants.CUSTOM_LAYOUT_HEIGHT)
    .justifyContent(FlexAlign.Center)
  }
}

import Constants from '../common/constants/Constants';

@Component

export default struct LoadingLayout {

build() {

Row() {

Image($r('app.media.ic_pull_up_load'))

.width($r('app.float.refresh_img_size'))

.height($r('app.float.refresh_img_size'))

Text($r('app.string.pull_up_load_text'))

.margin({ left: $r('app.float.normal_padding') })

.fontSize($r('app.float.title_font'))

.textAlign(TextAlign.Center)

}

.width(Constants.FULL_PERCENT)

.height(Constants.CUSTOM_LAYOUT_HEIGHT)

.justifyContent(FlexAlign.Center)

}

LoadMoreLayout.ets


import RefreshLoadingClass from '../viewmodel/RefreshLoadingClass';
import Constants from '../common/constants/Constants';

/**
 * The load more layout component.
 */
@Component
export default struct LoadMoreLayout {
  @ObjectLink loadMoreLayoutClass: RefreshLoadingClass;

  build() {
    Row() {
      Image(this.loadMoreLayoutClass.imageSrc)
        .width($r('app.float.refresh_img_size'))
        .height($r('app.float.refresh_img_size'))

      Text(this.loadMoreLayoutClass.textValue)
        .margin({ left: $r('app.float.normal_padding') })
        .fontSize($r('app.float.title_font'))
        .textAlign(TextAlign.Center)
    }
    .clip(true)
    .width(Constants.FULL_PERCENT)
    .justifyContent(FlexAlign.Center)
    .height(this.loadMoreLayoutClass.heightValue)
  }
}

import RefreshLoadingClass from '../viewmodel/RefreshLoadingClass';

import Constants from '../common/constants/Constants';

/**

* The load more layout component.

@Component

export default struct LoadMoreLayout {

@ObjectLink loadMoreLayoutClass: RefreshLoadingClass;

build() {

Row() {

Image(this.loadMoreLayoutClass.imageSrc)

.width($r('app.float.refresh_img_size'))

.height($r('app.float.refresh_img_size'))

Text(this.loadMoreLayoutClass.textValue)

.margin({ left: $r('app.float.normal_padding') })

.fontSize($r('app.float.title_font'))

.textAlign(TextAlign.Center)

}

.clip(true)

.width(Constants.FULL_PERCENT)

.justifyContent(FlexAlign.Center)

.height(this.loadMoreLayoutClass.heightValue)

}

NewsItem.ets


import { NewsData, NewsFile } from '../viewmodel/NewsData';
import Constants from '../common/constants/Constants';

/**
 * The news list item component.
 */
@Component
export default struct NewsItem {
  newsData: NewsData = new NewsData();

  build() {
    Column() {
      Row() {
        Image($r('app.media.ic_news'))
          .height($r('app.float.title_font'))
          .aspectRatio(Constants.TYPE_ASPECT_RATIO)
        Text(this.newsData?.title)
          .fontSize($r('app.float.title_font'))
          .fontColor($r('app.color.title_color'))
          .layoutWeight(1)
          .maxLines(1)
          .lineHeight($r('app.float.title_line_height'))
          .fontFamily($r('app.string.harmony_hei_ti_medium'))
          .margin({ left: $r('app.float.normal_padding') })
          .textOverflow({ overflow: TextOverflow.Ellipsis })
          .fontWeight(Constants.TITLE_FONT_WEIGHT)
      }
      .alignItems(VerticalAlign.Center)
      .width(Constants.FULL_PERCENT)

      Text(this.newsData?.content)
        .fontSize($r('app.float.desc_font'))
        .fontFamily($r('app.string.harmony_hei_ti'))
        .opacity(Constants.DESC_OPACITY)
        .fontColor($r('app.color.title_color'))
        .lineHeight($r('app.float.desc_line_height'))
        .width(Constants.FULL_PERCENT)
        .maxLines(Constants.CONTENT_MAX_LINE)
        .fontWeight(Constants.DESC_FONT_WEIGHT)
        .textOverflow({ overflow: TextOverflow.Ellipsis })

      Row({ space: Constants.ITEM_IMG_SPACE }) {
        ForEach((this.newsData.imagesUrl), (itemImg: NewsFile) => {
          Image(Constants.SERVER + itemImg?.url)
            .height(Constants.FULL_PERCENT)
            .aspectRatio(1)
            .objectFit(ImageFit.Cover)
            .borderRadius($r('app.float.item_img_border_radius'))
        }, (itemImg: NewsFile) => JSON.stringify(itemImg))
      }
      .clip(true)
      .width(Constants.FULL_PERCENT)
      .height($r('app.float.item_img_size'))
      .margin({ top: $r('app.float.common_padding') })

      Text(this.newsData?.source)
        .fontSize($r('app.float.source_font'))
        .fontColor($r('app.color.fontColor_text2'))
        .width(Constants.FULL_PERCENT)
        .margin({ top: $r('app.float.normal_padding') })
    }
    .padding($r('app.float.common_padding'))
  }
}

import { NewsData, NewsFile } from '../viewmodel/NewsData';

import Constants from '../common/constants/Constants';

/**

* The news list item component.

@Component

export default struct NewsItem {

newsData: NewsData = new NewsData();

build() {

Column() {

Row() {

Image($r('app.media.ic_news'))

.height($r('app.float.title_font'))

.aspectRatio(Constants.TYPE_ASPECT_RATIO)

Text(this.newsData?.title)

.fontSize($r('app.float.title_font'))

.fontColor($r('app.color.title_color'))

.layoutWeight(1)

.maxLines(1)

.lineHeight($r('app.float.title_line_height'))

.fontFamily($r('app.string.harmony_hei_ti_medium'))

.margin({ left: $r('app.float.normal_padding') })

.textOverflow({ overflow: TextOverflow.Ellipsis })

.fontWeight(Constants.TITLE_FONT_WEIGHT)

}

.alignItems(VerticalAlign.Center)

.width(Constants.FULL_PERCENT)

Text(this.newsData?.content)

.fontSize($r('app.float.desc_font'))

.fontFamily($r('app.string.harmony_hei_ti'))

.opacity(Constants.DESC_OPACITY)

.fontColor($r('app.color.title_color'))

.lineHeight($r('app.float.desc_line_height'))

.width(Constants.FULL_PERCENT)

.maxLines(Constants.CONTENT_MAX_LINE)

.fontWeight(Constants.DESC_FONT_WEIGHT)

.textOverflow({ overflow: TextOverflow.Ellipsis })

Row({ space: Constants.ITEM_IMG_SPACE }) {

ForEach((this.newsData.imagesUrl), (itemImg: NewsFile) => {

Image(Constants.SERVER + itemImg?.url)

.height(Constants.FULL_PERCENT)

.aspectRatio(1)

.objectFit(ImageFit.Cover)

.borderRadius($r('app.float.item_img_border_radius'))

}, (itemImg: NewsFile) => JSON.stringify(itemImg))

}

.clip(true)

.width(Constants.FULL_PERCENT)

.height($r('app.float.item_img_size'))

.margin({ top: $r('app.float.common_padding') })

Text(this.newsData?.source)

.fontSize($r('app.float.source_font'))

.fontColor($r('app.color.fontColor_text2'))

.width(Constants.FULL_PERCENT)

.margin({ top: $r('app.float.normal_padding') })

}

.padding($r('app.float.common_padding'))

}

NewsList.ets


import NewsItem from './NewsItem';
import LoadMoreLayout from './LoadMoreLayout';
import RefreshLayout from './RefreshLayout';
import { NewsData } from '../viewmodel/NewsData';
import Constants, { PageState } from '../common/constants/Constants';
import NewsViewModel from '../viewmodel/NewsViewModel';
import { showToast } from '../common/utils/ToastUtil';
import FailureLayout from './FailureLayout';
import LoadingLayout from './LoadingLayout';
import NoMoreLayout from './NoMoreLayout';
import RefreshListViewModel from '../viewmodel/RefreshListViewModel';

/**
 * The news list component.
 */
@Component
export default struct NewsList {
  index: number = 0;
  @Watch('changeCategory') @Link currentIndex: number;
  @State refreshStore: RefreshListViewModel = new RefreshListViewModel();

  changeCategory() {
    if (this.currentIndex !== this.index) {
      return;
    }
    this.refreshStore.currentPage = 1;
    NewsViewModel.getNewsList(this.refreshStore.currentPage, this.refreshStore.pageSize).then((data: NewsData[]) => {
      this.refreshStore.pageState = PageState.Success;
      if (data.length === this.refreshStore.pageSize) {
        this.refreshStore.currentPage++;
        this.refreshStore.hasMore = true;
      } else {
        this.refreshStore.hasMore = false;
      }
      this.refreshStore.newsData = data;
    }).catch((err: string | Resource) => {
      showToast(err);
      this.refreshStore.pageState = PageState.Fail;
    });
  }

  aboutToAppear() {
    // Load data.
    this.changeCategory();
  }

  reloadAction() {
    this.refreshStore.pageState = PageState.Loading;
    this.changeCategory();
  }

  build() {
    Column() {
      if (this.refreshStore.pageState === PageState.Loading) {
        LoadingLayout()
      } else if (this.refreshStore.pageState === PageState.Success) {
        this.ListLayout()
      } else {
        FailureLayout({ reloadAction: () => {
          this.reloadAction();
        } })
      }
    }
    .width(Constants.FULL_PERCENT)
    .height(Constants.FULL_PERCENT)
    .justifyContent(FlexAlign.Center)
    .onTouch((event?: TouchEvent) => {
      if (event) {
        if (this.refreshStore.pageState === PageState.Success) {
          this.refreshStore.listTouchEvent(event);
        }
      }
    })
  }

  @Builder ListLayout() {
    List({ space: Constants.LIST_SPACE }) {
      ListItem() {
        RefreshLayout({ refreshLoadingClass: this.refreshStore.refreshLayoutClass })
      }
      ForEach(this.refreshStore.newsData, (item: NewsData) => {
        ListItem() {
          NewsItem({ newsData: item })
        }
        .backgroundColor($r('app.color.white'))
        .borderRadius($r('app.float.item_border_radius'))
      }, (item: NewsData, index?: number) => JSON.stringify(item) + index)
      ListItem() {
        if (this.refreshStore.hasMore) {
          LoadMoreLayout({ loadMoreLayoutClass: this.refreshStore.loadingMoreClass })
        } else {
          NoMoreLayout()
        }
      }
    }
    .width(Constants.FULL_PERCENT)
    .height(Constants.FULL_PERCENT)
    .padding({ left: $r('app.float.common_padding'), right: $r('app.float.common_padding') })
    .backgroundColor($r('app.color.listColor'))
    .edgeEffect(EdgeEffect.None)
    .onScrollIndex((start: number, end: number) => {
      // Listen to the first index of the current list.
      this.refreshStore.startIndex = start;
      this.refreshStore.endIndex = end;
    })
  }
}

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import NewsItem from './NewsItem';

import LoadMoreLayout from './LoadMoreLayout';

import RefreshLayout from './RefreshLayout';

import { NewsData } from '../viewmodel/NewsData';

import Constants, { PageState } from '../common/constants/Constants';

import NewsViewModel from '../viewmodel/NewsViewModel';

import { showToast } from '../common/utils/ToastUtil';

import FailureLayout from './FailureLayout';

import LoadingLayout from './LoadingLayout';

import NoMoreLayout from './NoMoreLayout';

import RefreshListViewModel from '../viewmodel/RefreshListViewModel';

/**

* The news list component.

@Component

export default struct NewsList {

index: number = 0;

@Watch('changeCategory') @Link currentIndex: number;

@State refreshStore: RefreshListViewModel = new RefreshListViewModel();

changeCategory() {

if (this.currentIndex !== this.index) {

return;

}

this.refreshStore.currentPage = 1;

NewsViewModel.getNewsList(this.refreshStore.currentPage, this.refreshStore.pageSize).then((data: NewsData[]) => {

this.refreshStore.pageState = PageState.Success;

if (data.length === this.refreshStore.pageSize) {

this.refreshStore.currentPage++;

this.refreshStore.hasMore = true;

} else {

this.refreshStore.hasMore = false;

}

this.refreshStore.newsData = data;

}).catch((err: string | Resource) => {

showToast(err);

this.refreshStore.pageState = PageState.Fail;

});

}

aboutToAppear() {

// Load data.

this.changeCategory();

}

reloadAction() {

this.refreshStore.pageState = PageState.Loading;

this.changeCategory();

}

build() {

Column() {

if (this.refreshStore.pageState === PageState.Loading) {

LoadingLayout()

} else if (this.refreshStore.pageState === PageState.Success) {

this.ListLayout()

} else {

FailureLayout({ reloadAction: () => {

this.reloadAction();

} })

}

.width(Constants.FULL_PERCENT)

.height(Constants.FULL_PERCENT)

.justifyContent(FlexAlign.Center)

.onTouch((event?: TouchEvent) => {

if (event) {

if (this.refreshStore.pageState === PageState.Success) {

this.refreshStore.listTouchEvent(event);

}

})

}

@Builder ListLayout() {

List({ space: Constants.LIST_SPACE }) {

ListItem() {

RefreshLayout({ refreshLoadingClass: this.refreshStore.refreshLayoutClass })

}

ForEach(this.refreshStore.newsData, (item: NewsData) => {

ListItem() {

NewsItem({ newsData: item })

}

.backgroundColor($r('app.color.white'))

.borderRadius($r('app.float.item_border_radius'))

}, (item: NewsData, index?: number) => JSON.stringify(item) + index)

ListItem() {

if (this.refreshStore.hasMore) {

LoadMoreLayout({ loadMoreLayoutClass: this.refreshStore.loadingMoreClass })

} else {

NoMoreLayout()

}

.width(Constants.FULL_PERCENT)

.height(Constants.FULL_PERCENT)

.padding({ left: $r('app.float.common_padding'), right: $r('app.float.common_padding') })

.backgroundColor($r('app.color.listColor'))

.edgeEffect(EdgeEffect.None)

.onScrollIndex((start: number, end: number) => {

// Listen to the first index of the current list.

this.refreshStore.startIndex = start;

this.refreshStore.endIndex = end;

})

}

NoMoreLayout.ets


/**
 * The No more data layout component.
 */
import Constants from '../common/constants/Constants';

@Component
export default struct NoMoreLayout {
  build() {
    Row() {
      Text($r('app.string.prompt_message'))
        .margin({ left: $r('app.float.normal_padding') })
        .fontSize($r('app.float.title_font'))
        .textAlign(TextAlign.Center)
    }
    .width(Constants.FULL_PERCENT)
    .justifyContent(FlexAlign.Center)
    .height(Constants.CUSTOM_LAYOUT_HEIGHT)
  }
}

/**

* The No more data layout component.

import Constants from '../common/constants/Constants';

@Component

export default struct NoMoreLayout {

build() {

Row() {

Text($r('app.string.prompt_message'))

.margin({ left: $r('app.float.normal_padding') })

.fontSize($r('app.float.title_font'))

.textAlign(TextAlign.Center)

}

.width(Constants.FULL_PERCENT)

.justifyContent(FlexAlign.Center)

.height(Constants.CUSTOM_LAYOUT_HEIGHT)

}

RefreshLayout.ets


import RefreshLoadingClass from '../viewmodel/RefreshLoadingClass';
import Constants from '../common/constants/Constants';

/**
 * The refresh layout component.
 */
@Component
export default struct RefreshLayout {
  @ObjectLink refreshLoadingClass: RefreshLoadingClass;

  build() {
    Row() {
      Image(this.refreshLoadingClass.imageSrc)
        .width($r('app.float.refresh_img_size'))
        .height($r('app.float.refresh_img_size'))

      Text(this.refreshLoadingClass.textValue)
        .margin({ left: $r('app.float.normal_padding') })
        .fontSize($r('app.float.title_font'))
        .textAlign(TextAlign.Center)
    }
    .clip(true)
    .width(Constants.FULL_PERCENT)
    .justifyContent(FlexAlign.Center)
    .height(this.refreshLoadingClass.heightValue)
  }
}

import RefreshLoadingClass from '../viewmodel/RefreshLoadingClass';

import Constants from '../common/constants/Constants';

/**

* The refresh layout component.

@Component

export default struct RefreshLayout {

@ObjectLink refreshLoadingClass: RefreshLoadingClass;

build() {

Row() {

Image(this.refreshLoadingClass.imageSrc)

.width($r('app.float.refresh_img_size'))

.height($r('app.float.refresh_img_size'))

Text(this.refreshLoadingClass.textValue)

.margin({ left: $r('app.float.normal_padding') })

.fontSize($r('app.float.title_font'))

.textAlign(TextAlign.Center)

}

.clip(true)

.width(Constants.FULL_PERCENT)

.justifyContent(FlexAlign.Center)

.height(this.refreshLoadingClass.heightValue)

}

UploadingLayout.ets


import Constants from '../common/constants/Constants';

@Component
export default struct UploadingLayout {

  build() {
    Column() {
      Image($r('app.media.ic_pull_up_load'))
        .width($r('app.float.btn_size'))
        .height($r('app.float.btn_size'))
      Text($r('app.string.uploading_text'))
        .margin({ top: $r('app.float.common_padding') })
        .fontSize($r('app.float.title_font'))
        .fontColor($r('app.color.title_color'))
        .textAlign(TextAlign.Center)
    }
    .width(Constants.FULL_PERCENT)
    .height(Constants.FULL_PERCENT)
    .justifyContent(FlexAlign.Center)
  }
}

import Constants from '../common/constants/Constants';

@Component

export default struct UploadingLayout {

build() {

Column() {

Image($r('app.media.ic_pull_up_load'))

.width($r('app.float.btn_size'))

.height($r('app.float.btn_size'))

Text($r('app.string.uploading_text'))

.margin({ top: $r('app.float.common_padding') })

.fontSize($r('app.float.title_font'))

.fontColor($r('app.color.title_color'))

.textAlign(TextAlign.Center)

}

.width(Constants.FULL_PERCENT)

.height(Constants.FULL_PERCENT)

.justifyContent(FlexAlign.Center)

}

viewmodel

GlobalContext.ets


export class GlobalContext {
  private constructor() { }
  private static instance: GlobalContext;
  private _objects = new Map<string, Object>();

  public static getContext(): GlobalContext {
    if (!GlobalContext.instance) {
      GlobalContext.instance = new GlobalContext();
    }
    return GlobalContext.instance;
  }

  getObject(value: string): Object | undefined {
    return this._objects.get(value);
  }

  setObject(key: string, objectClass: Object): void {
    this._objects.set(key, objectClass);
  }
}

export class GlobalContext {

private constructor() { }

private static instance: GlobalContext;

private _objects = new Map<string, Object>();

public static getContext(): GlobalContext {

if (!GlobalContext.instance) {

GlobalContext.instance = new GlobalContext();

}

return GlobalContext.instance;

}

getObject(value: string): Object | undefined {

return this._objects.get(value);

}

setObject(key: string, objectClass: Object): void {

this._objects.set(key, objectClass);

}

NewsData.ets


/**
 * News list item info.
 */
export class NewsData {
  /**
   * News list item title.
   */
  title: string = '';

  /**
   * News list item content.
   */
  content: string = '';

  /**
   * News list item imagesUrl.
   */
  imagesUrl: Array<NewsFile> = [new NewsFile()];

  /**
   * News list item source.
   */
  source: string = '';
}

/**
 * News image list item info.
 */
export class NewsFile {
  /**
   * News image list item id.
   */
  id: number = 0;

  /**
   * News image list item url.
   */
  url:  | Object | ArrayBuffer = '';

  /**
   * News image list item type.
   */
  type: number = 0;

  /**
   * News image list item newsId.
   */
  newsId: number = 0;
}

/**

* News list item info.

export class NewsData {

/**

* News list item title.

title: string = '';

/**

* News list item content.

content: string = '';

/**

* News list item imagesUrl.

imagesUrl: Array<NewsFile> = [new NewsFile()];

/**

* News list item source.

source: string = '';

}

/**

* News image list item info.

export class NewsFile {

/**

* News image list item id.

id: number = 0;

/**

* News image list item url.

url: | Object | ArrayBuffer = '';

/**

* News image list item type.

type: number = 0;

/**

* News image list item newsId.

newsId: number = 0;

}

NewsTypeModel.ets


export default  class NewsTypeBean {
  id: number;
  name: ResourceStr;

  constructor(id: number, name: ResourceStr) {
    this.id = id;
    this.name = name;
  }
}

export default class NewsTypeBean {

id: number;

name: ResourceStr;

constructor(id: number, name: ResourceStr) {

this.id = id;

this.name = name;

}

NewsTypeViewModel.ets


import NewsTypeBean from './NewsTypeModel'
import ResponseResult from './ResponseResult';
import Constants from '../common/constants/Constants';
import { httpRequestGet } from '../common/utils/HttpUtil';

const DEFAULT_NEWS_TYPES: NewsTypeBean[] = [
  new NewsTypeBean(0, $r('app.string.tab_all')),
  new NewsTypeBean(1, $r('app.string.tab_domestic')),
  new NewsTypeBean(2, $r('app.string.tab_international')),
  new NewsTypeBean(3, $r('app.string.tab_fun')),
  new NewsTypeBean(4, $r('app.string.tab_military')),
  new NewsTypeBean(5, $r('app.string.tab_sports')),
  new NewsTypeBean(6, $r('app.string.tab_science'))
];

class NewsTypeViewModel {
  /**
   * Get news type list from server.
   *
   * @return NewsTypeBean[] newsTypeList
   */
  getNewsTypeList(): Promise<NewsTypeBean[]> {
    return new Promise((resolve: Function) => {
      let url = `${Constants.SERVER}/${Constants.GET_NEWS_TYPE}`;
      httpRequestGet(url).then((data: ResponseResult) => {
        if (data.code === Constants.SERVER_CODE_SUCCESS) {
          resolve(data.data);
        } else {
          resolve(DEFAULT_NEWS_TYPES);
        }
      }).catch(() => {
        resolve(DEFAULT_NEWS_TYPES);
      });
    });
  }

  /**
   * Get default news type list.
   *
   * @return NewsTypeBean[] newsTypeList
   */
  getDefaultTypeList(): NewsTypeBean[] {
    return DEFAULT_NEWS_TYPES;
  }
}

let newsTypeViewModel = new NewsTypeViewModel();

export default newsTypeViewModel as NewsTypeViewModel;

import NewsTypeBean from './NewsTypeModel'

import ResponseResult from './ResponseResult';

import Constants from '../common/constants/Constants';

import { httpRequestGet } from '../common/utils/HttpUtil';

const DEFAULT_NEWS_TYPES: NewsTypeBean[] = [

new NewsTypeBean(0, $r('app.string.tab_all')),

new NewsTypeBean(1, $r('app.string.tab_domestic')),

new NewsTypeBean(2, $r('app.string.tab_international')),

new NewsTypeBean(3, $r('app.string.tab_fun')),

new NewsTypeBean(4, $r('app.string.tab_military')),

new NewsTypeBean(5, $r('app.string.tab_sports')),

new NewsTypeBean(6, $r('app.string.tab_science'))

];

class NewsTypeViewModel {

/**

* Get news type list from server.

* @return NewsTypeBean[] newsTypeList

getNewsTypeList(): Promise<NewsTypeBean[]> {

return new Promise((resolve: Function) => {

let url = `${Constants.SERVER}/${Constants.GET_NEWS_TYPE}`;

httpRequestGet(url).then((data: ResponseResult) => {

if (data.code === Constants.SERVER_CODE_SUCCESS) {

resolve(data.data);

} else {

resolve(DEFAULT_NEWS_TYPES);

}

}).catch(() => {

resolve(DEFAULT_NEWS_TYPES);

});

}

/**

* Get default news type list.

* @return NewsTypeBean[] newsTypeList

getDefaultTypeList(): NewsTypeBean[] {

return DEFAULT_NEWS_TYPES;

}

let newsTypeViewModel = new NewsTypeViewModel();

export default newsTypeViewModel as NewsTypeViewModel;

NewsViewModel.ets


import { NewsData } from './NewsData';
import ResponseResult from './ResponseResult';
import Constants from '../common/constants/Constants';
import { httpRequestGet, httpRequestPost } from '../common/utils/HttpUtil';
import Logger from '../common/utils/Logger';

class NewsViewModel {
  /**
   * Get news type list from server.
   *
   * @return NewsData[] newsDataList
   */
  getNewsList(currentPage: number, pageSize: number): Promise<NewsData[]> {
    return new Promise(async (resolve: Function, reject: Function) => {
      let url = `${Constants.SERVER}/${Constants.GET_NEWS_LIST}`;
      url += '?currentPage=' + currentPage + '&pageSize=' + pageSize;
      httpRequestGet(url).then((data: ResponseResult) => {
        if (data.code === Constants.SERVER_CODE_SUCCESS) {
          resolve(data.data);
        } else {
          Logger.error('getNewsList failed', JSON.stringify(data));
          reject($r('app.string.page_none_msg'));
        }
      }).catch((err: Error) => {
        Logger.error('getNewsList failed', JSON.stringify(err));
        reject($r('app.string.http_error_message'));
      });
    });
  }

  /**
   * Upload news data.
   *
   * @param newsData
   * @returns NewsData[] newsDataList
   */
  uploadNews(newsData: NewsData): Promise<NewsData[]> {
    return new Promise((resolve: Function, reject: Function) => {
      let url = `${Constants.SERVER}/${Constants.UPLOAD_NEWS}`;
      httpRequestPost(url, newsData).then((result: ResponseResult) => {
        if (result && result.code === Constants.SERVER_CODE_SUCCESS) {
          resolve(result.data);
        } else {
          reject($r('app.string.upload_error_message'));
        }
      }).catch((err: Error) => {
        Logger.error('uploadNews failed', JSON.stringify(err));
        reject($r('app.string.upload_error_message'));
      });
    });
  }
}

let newsViewModel = new NewsViewModel();

export default newsViewModel as NewsViewModel;

import { NewsData } from './NewsData';

import ResponseResult from './ResponseResult';

import Constants from '../common/constants/Constants';

import { httpRequestGet, httpRequestPost } from '../common/utils/HttpUtil';

import Logger from '../common/utils/Logger';

class NewsViewModel {

/**

* Get news type list from server.

* @return NewsData[] newsDataList

getNewsList(currentPage: number, pageSize: number): Promise<NewsData[]> {

return new Promise(async (resolve: Function, reject: Function) => {

let url = `${Constants.SERVER}/${Constants.GET_NEWS_LIST}`;

url += '?currentPage=' + currentPage + '&pageSize=' + pageSize;

httpRequestGet(url).then((data: ResponseResult) => {

if (data.code === Constants.SERVER_CODE_SUCCESS) {

resolve(data.data);

} else {

Logger.error('getNewsList failed', JSON.stringify(data));

reject($r('app.string.page_none_msg'));

}

}).catch((err: Error) => {

Logger.error('getNewsList failed', JSON.stringify(err));

reject($r('app.string.http_error_message'));

});

}

/**

* Upload news data.

* @param newsData

* @returns NewsData[] newsDataList

uploadNews(newsData: NewsData): Promise<NewsData[]> {

return new Promise((resolve: Function, reject: Function) => {

let url = `${Constants.SERVER}/${Constants.UPLOAD_NEWS}`;

httpRequestPost(url, newsData).then((result: ResponseResult) => {

if (result && result.code === Constants.SERVER_CODE_SUCCESS) {

resolve(result.data);

} else {

reject($r('app.string.upload_error_message'));

}

}).catch((err: Error) => {

Logger.error('uploadNews failed', JSON.stringify(err));

reject($r('app.string.upload_error_message'));

});

}

let newsViewModel = new NewsViewModel();

export default newsViewModel as NewsViewModel;

RefreshListViewModel.ets


import { promptAction } from '@kit.ArkUI';
import Constants, { RefreshState, RefreshConstant, PageState } from '../common/constants/Constants';
import NewsViewModel from './NewsViewModel';
import { NewsData } from './NewsData';
import RefreshLoadingClass from './RefreshLoadingClass';

@Observed
export default class RefreshListViewModel {
  private downY = 0;
  private lastMoveY = 0;
  private isRefreshing: boolean = false;
  private isCanRefresh = false;
  private isPullRefreshOperation = false;
  private isLoading: boolean = false;
  private isCanLoadMore = false;
  public startIndex = 0;
  public endIndex = 0;
  public newsData: Array<NewsData> = [];
  public currentPage: number = 1;
  public pageSize: number = 4;
  public offsetY: number = 0;
  public hasMore: boolean = true;
  public refreshLayoutClass: RefreshLoadingClass = new RefreshLoadingClass($r('app.media.ic_pull_down_refresh'),
    $r('app.string.pull_down_refresh_text'), 0);
  public loadingMoreClass: RefreshLoadingClass = new RefreshLoadingClass($r('app.media.ic_pull_up_load'),
    $r('app.string.pull_up_load_text'), 0);
  public pageState: number = PageState.Loading;

  listTouchEvent(event: TouchEvent) {
    switch (event.type) {
      case TouchType.Down:
        this.downY = event.touches[0].y;
        this.lastMoveY = event.touches[0].y;
        break;
      case TouchType.Move:
        if (this.isRefreshing || this.isLoading) {
          return;
        }
        let isDownPull = event.touches[0].y - this.lastMoveY > 0;
        if ((isDownPull || this.isPullRefreshOperation) && !this.isCanLoadMore) {
          // Touch move pull refresh.
          this.touchMovePullRefresh(event);
        } else {
          // Touch move load more.
          this.touchMoveLoadMore(event);
        }
        this.lastMoveY = event.touches[0].y;
        break;
      case TouchType.Cancel:
        break;
      case TouchType.Up:
        if (this.isRefreshing || this.isLoading) {
          return;
        }
        if (this.isPullRefreshOperation) {
          // Touch up pull refresh.
          this.touchUpPullRefresh();
        } else {
          // Touch up load more.
          this.touchUpLoadMore();
        }
        break;
      default:
        break;
    }
  }

  touchMovePullRefresh(event: TouchEvent) {
    if (this.startIndex === 0) {
      this.isPullRefreshOperation = true;
      let height = vp2px(Constants.CUSTOM_LAYOUT_HEIGHT);
      this.offsetY = event.touches[0].y - this.downY;
      // Check offsetY to Refresh.
      if (this.offsetY >= height) {
        this.pullRefreshState(RefreshState.Release);
        this.offsetY = height + this.offsetY * Constants.Y_OFF_SET_COEFFICIENT;
      } else {
        this.pullRefreshState(RefreshState.DropDown);
      }
      if (this.offsetY < 0) {
        this.offsetY = 0;
        this.isPullRefreshOperation = false;
      }
    }
  }

  touchUpPullRefresh() {
    if (this.isCanRefresh) {
      this.offsetY = vp2px(Constants.CUSTOM_LAYOUT_HEIGHT);
      this.pullRefreshState(RefreshState.Refreshing);
      this.currentPage = 1;
      setTimeout(() => {
        NewsViewModel.getNewsList(this.currentPage, this.pageSize).then((data: NewsData[]) => {
          if (data.length === this.pageSize) {
            this.currentPage++;
            this.hasMore = true;
          } else {
            this.hasMore = false;
          }
          this.newsData = data;
          this.closeRefresh(true);
        }).catch((errMsg: string | Resource) => {
          promptAction.showToast({ message: errMsg });
          this.closeRefresh(false);
        })
      }, Constants.DELAY_TIME);
    } else {
      this.closeRefresh(false);
    }
  }

  pullRefreshState(state: number) {
    switch (state) {
      case RefreshState.DropDown:
        this.isCanRefresh = false;
        this.isRefreshing = false;
        this.refreshLayoutClass = new RefreshLoadingClass($r('app.media.ic_pull_down_refresh'),
          $r('app.string.pull_down_refresh_text'), Constants.CUSTOM_LAYOUT_HEIGHT)
        break;
      case RefreshState.Release:
        this.refreshLayoutClass.imageSrc = $r('app.media.ic_pull_up_refresh');
        this.refreshLayoutClass.textValue = $r('app.string.release_refresh_text');
        this.isCanRefresh = true;
        this.isRefreshing = false;
        break;
      case RefreshState.Refreshing:
        this.offsetY = vp2px(this.refreshLayoutClass.heightValue);
        this.refreshLayoutClass.imageSrc = $r('app.media.ic_pull_up_load');
        this.refreshLayoutClass.textValue = $r('app.string.refreshing_text');
        this.isCanRefresh = true;
        this.isRefreshing = true;
        break;
      case RefreshState.Success:
        this.refreshLayoutClass.imageSrc = $r('app.media.ic_succeed_refresh');
        this.refreshLayoutClass.textValue = $r('app.string.refresh_success_text');
        this.isCanRefresh = true;
        this.isRefreshing = true;
        break;
      case RefreshState.Fail:
        this.refreshLayoutClass.imageSrc = $r('app.media.ic_fail_refresh');
        this.refreshLayoutClass.textValue = $r('app.string.refresh_fail_text');
        this.isCanRefresh = true;
        this.isRefreshing = true;
        break;
      default:
        break;
    }
  }

  closeRefresh(isRefreshSuccess: boolean) {
    setTimeout(() => {
      let delay = RefreshConstant.DELAY_PULL_DOWN_REFRESH;
      if (this.isCanRefresh) {
        this.pullRefreshState(isRefreshSuccess ? RefreshState.Success : RefreshState.Fail);
        delay = RefreshConstant.DELAY_SHRINK_ANIMATION_TIME;
      }
      animateTo({
        duration: RefreshConstant.CLOSE_PULL_DOWN_REFRESH_TIME,
        delay: delay,
        onFinish: () => {
          this.pullRefreshState(RefreshState.DropDown);
          this.refreshLayoutClass.heightValue = 0;
          this.isPullRefreshOperation = false;
        }
      }, () => {
        this.offsetY = 0;
      });
    }, this.isCanRefresh ? Constants.DELAY_ANIMATION_DURATION : 0);
  }

  touchMoveLoadMore(event: TouchEvent) {
    if (this.endIndex >= this.newsData.length - 1) {
      this.offsetY = event.touches[0].y - this.downY;
      if (Math.abs(this.offsetY) > vp2px(Constants.CUSTOM_LAYOUT_HEIGHT) / 2) {
        this.isCanLoadMore = true;
        this.loadingMoreClass.heightValue = Constants.CUSTOM_LAYOUT_HEIGHT;
        this.offsetY = -vp2px(Constants.CUSTOM_LAYOUT_HEIGHT) + this.offsetY * Constants.Y_OFF_SET_COEFFICIENT;
      }
    }
  }

  touchUpLoadMore() {
    if (this.isCanLoadMore && this.hasMore) {
      this.isLoading = true;
      setTimeout(() => {
        NewsViewModel.getNewsList(this.currentPage, this.pageSize).then((data: NewsData[]) => {
          if (data.length === this.pageSize) {
            this.currentPage++;
            this.hasMore = true;
          } else {
            this.hasMore = false;
          }
          this.newsData = this.newsData.concat(data);
        }).catch((errMsg: string | Resource) => {
          promptAction.showToast({ message: errMsg });
        })
        this.closeLoadMore();
      }, Constants.DELAY_TIME);
    } else {
      this.closeLoadMore();
    }
  }

  closeLoadMore() {
    this.isCanLoadMore = false;
    this.isLoading = false;
    this.loadingMoreClass.heightValue = 0;
  }
}

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import { promptAction } from '@kit.ArkUI';

import Constants, { RefreshState, RefreshConstant, PageState } from '../common/constants/Constants';

import NewsViewModel from './NewsViewModel';

import { NewsData } from './NewsData';

import RefreshLoadingClass from './RefreshLoadingClass';

@Observed

export default class RefreshListViewModel {

private downY = 0;

private lastMoveY = 0;

private isRefreshing: boolean = false;

private isCanRefresh = false;

private isPullRefreshOperation = false;

private isLoading: boolean = false;

private isCanLoadMore = false;

public startIndex = 0;

public endIndex = 0;

public newsData: Array<NewsData> = [];

public currentPage: number = 1;

public pageSize: number = 4;

public offsetY: number = 0;

public hasMore: boolean = true;

public refreshLayoutClass: RefreshLoadingClass = new RefreshLoadingClass($r('app.media.ic_pull_down_refresh'),

$r('app.string.pull_down_refresh_text'), 0);

public loadingMoreClass: RefreshLoadingClass = new RefreshLoadingClass($r('app.media.ic_pull_up_load'),

$r('app.string.pull_up_load_text'), 0);

public pageState: number = PageState.Loading;

listTouchEvent(event: TouchEvent) {

switch (event.type) {

case TouchType.Down:

this.downY = event.touches[0].y;

this.lastMoveY = event.touches[0].y;

break;

case TouchType.Move:

if (this.isRefreshing || this.isLoading) {

return;

}

let isDownPull = event.touches[0].y - this.lastMoveY > 0;

if ((isDownPull || this.isPullRefreshOperation) && !this.isCanLoadMore) {

// Touch move pull refresh.

this.touchMovePullRefresh(event);

} else {

// Touch move load more.

this.touchMoveLoadMore(event);

}

this.lastMoveY = event.touches[0].y;

break;

case TouchType.Cancel:

break;

case TouchType.Up:

if (this.isRefreshing || this.isLoading) {

return;

}

if (this.isPullRefreshOperation) {

// Touch up pull refresh.

this.touchUpPullRefresh();

} else {

// Touch up load more.

this.touchUpLoadMore();

}

break;

default:

break;

}

touchMovePullRefresh(event: TouchEvent) {

if (this.startIndex === 0) {

this.isPullRefreshOperation = true;

let height = vp2px(Constants.CUSTOM_LAYOUT_HEIGHT);

this.offsetY = event.touches[0].y - this.downY;

// Check offsetY to Refresh.

if (this.offsetY >= height) {

this.pullRefreshState(RefreshState.Release);

this.offsetY = height + this.offsetY * Constants.Y_OFF_SET_COEFFICIENT;

} else {

this.pullRefreshState(RefreshState.DropDown);

}

if (this.offsetY < 0) {

this.offsetY = 0;

this.isPullRefreshOperation = false;

}

touchUpPullRefresh() {

if (this.isCanRefresh) {

this.offsetY = vp2px(Constants.CUSTOM_LAYOUT_HEIGHT);

this.pullRefreshState(RefreshState.Refreshing);

this.currentPage = 1;

setTimeout(() => {

NewsViewModel.getNewsList(this.currentPage, this.pageSize).then((data: NewsData[]) => {

if (data.length === this.pageSize) {

this.currentPage++;

this.hasMore = true;

} else {

this.hasMore = false;

}

this.newsData = data;

this.closeRefresh(true);

}).catch((errMsg: string | Resource) => {

promptAction.showToast({ message: errMsg });

this.closeRefresh(false);

})

}, Constants.DELAY_TIME);

} else {

this.closeRefresh(false);

}

pullRefreshState(state: number) {

switch (state) {

case RefreshState.DropDown:

this.isCanRefresh = false;

this.isRefreshing = false;

this.refreshLayoutClass = new RefreshLoadingClass($r('app.media.ic_pull_down_refresh'),

$r('app.string.pull_down_refresh_text'), Constants.CUSTOM_LAYOUT_HEIGHT)

break;

case RefreshState.Release:

this.refreshLayoutClass.imageSrc = $r('app.media.ic_pull_up_refresh');

this.refreshLayoutClass.textValue = $r('app.string.release_refresh_text');

this.isCanRefresh = true;

this.isRefreshing = false;

break;

case RefreshState.Refreshing:

this.offsetY = vp2px(this.refreshLayoutClass.heightValue);

this.refreshLayoutClass.imageSrc = $r('app.media.ic_pull_up_load');

this.refreshLayoutClass.textValue = $r('app.string.refreshing_text');

this.isCanRefresh = true;

this.isRefreshing = true;

break;

case RefreshState.Success:

this.refreshLayoutClass.imageSrc = $r('app.media.ic_succeed_refresh');

this.refreshLayoutClass.textValue = $r('app.string.refresh_success_text');

this.isCanRefresh = true;

this.isRefreshing = true;

break;

case RefreshState.Fail:

this.refreshLayoutClass.imageSrc = $r('app.media.ic_fail_refresh');

this.refreshLayoutClass.textValue = $r('app.string.refresh_fail_text');

this.isCanRefresh = true;

this.isRefreshing = true;

break;

default:

break;

}

closeRefresh(isRefreshSuccess: boolean) {

setTimeout(() => {

let delay = RefreshConstant.DELAY_PULL_DOWN_REFRESH;

if (this.isCanRefresh) {

this.pullRefreshState(isRefreshSuccess ? RefreshState.Success : RefreshState.Fail);

delay = RefreshConstant.DELAY_SHRINK_ANIMATION_TIME;

}

animateTo({

duration: RefreshConstant.CLOSE_PULL_DOWN_REFRESH_TIME,

delay: delay,

onFinish: () => {

this.pullRefreshState(RefreshState.DropDown);

this.refreshLayoutClass.heightValue = 0;

this.isPullRefreshOperation = false;

}

}, () => {

this.offsetY = 0;

});

}, this.isCanRefresh ? Constants.DELAY_ANIMATION_DURATION : 0);

}

touchMoveLoadMore(event: TouchEvent) {

if (this.endIndex >= this.newsData.length - 1) {

this.offsetY = event.touches[0].y - this.downY;

if (Math.abs(this.offsetY) > vp2px(Constants.CUSTOM_LAYOUT_HEIGHT) / 2) {

this.isCanLoadMore = true;

this.loadingMoreClass.heightValue = Constants.CUSTOM_LAYOUT_HEIGHT;

this.offsetY = -vp2px(Constants.CUSTOM_LAYOUT_HEIGHT) + this.offsetY * Constants.Y_OFF_SET_COEFFICIENT;

}

touchUpLoadMore() {

if (this.isCanLoadMore && this.hasMore) {

this.isLoading = true;

setTimeout(() => {

NewsViewModel.getNewsList(this.currentPage, this.pageSize).then((data: NewsData[]) => {

if (data.length === this.pageSize) {

this.currentPage++;

this.hasMore = true;

} else {

this.hasMore = false;

}

this.newsData = this.newsData.concat(data);

}).catch((errMsg: string | Resource) => {

promptAction.showToast({ message: errMsg });

})

this.closeLoadMore();

}, Constants.DELAY_TIME);

} else {

this.closeLoadMore();

}

closeLoadMore() {

this.isCanLoadMore = false;

this.isLoading = false;

this.loadingMoreClass.heightValue = 0;

}

RefreshLoadingClass.ets


/**
 * Custom refresh load layout data.
 */
@Observed
export default class RefreshLoadingClass {

  /**
   * Custom refresh load layout imageSrc.
   */
  imageSrc: Resource;

  /**
   * Custom refresh load layout textValue.
   */
  textValue: Resource;

  /**
   * Custom refresh load layout heightValue.
   */
  heightValue: number;

  constructor(imageSrc: Resource, textValue: Resource, heightValue: number) {
    this.imageSrc = imageSrc;
    this.textValue = textValue;
    this.heightValue = heightValue;
  }
}

/**

* Custom refresh load layout data.

@Observed

export default class RefreshLoadingClass {

/**

* Custom refresh load layout imageSrc.

imageSrc: Resource;

/**

* Custom refresh load layout textValue.

textValue: Resource;

/**

* Custom refresh load layout heightValue.

heightValue: number;

constructor(imageSrc: Resource, textValue: Resource, heightValue: number) {

this.imageSrc = imageSrc;

this.textValue = textValue;

this.heightValue = heightValue;

}

ResponseResult.ets


/**
 * Data returned by the network request.
 */
export default class ResponseResult {
  /**
   * Code returned by the network request: success, fail.
   */
  code: string;

  /**
   * Message returned by the network request.
   */
  msg: string | Resource;

  /**
   * Data returned by the network request.
   */
  data: string | Object | ArrayBuffer;

  constructor() {
    this.code = '';
    this.msg = '';
    this.data = '';
  }
}

/**

* Data returned by the network request.

export default class ResponseResult {

/**

* Code returned by the network request: success, fail.

code: string;

/**

* Message returned by the network request.

msg: string | Resource;

/**

* Data returned by the network request.

data: string | Object | ArrayBuffer;

constructor() {

this.code = '';

this.msg = '';

this.data = '';

}

配置

module.json5

{
  "module": {
    "name": "entry",
    "type": "entry",
    "description": "$string:module_desc",
    "mainElement": "EntryAbility",
    "deviceTypes": [
      "phone"
    ],
    "deliveryWithInstall": true,
    "installationFree": false,
    "pages": "$profile:main_pages",
    "abilities": [
      {
        "name": "EntryAbility",
        "srcEntry": "./ets/entryability/EntryAbility.ets",
        "description": "$string:EntryAbility_desc",
        "icon": "$media:icon",
        "label": "$string:EntryAbility_label",
        "startWindowIcon": "$media:icon",
        "startWindowBackground": "$color:start_window_background",
        "exported": true,
        "skills": [
          {
            "entities": [
              "entity.system.home"
            ],
            "actions": [
              "action.system.home"
            ]
          }
        ]
      }
    ],
    "requestPermissions": [
      {
        "name": "ohos.permission.INTERNET",
        "reason": "$string:reason",
        "usedScene": {
          "abilities": [
            "EntryAbility"
          ],
          "when": "inuse"
        }
      }
    ]
  }
}

{

"module": {

"name": "entry",

"type": "entry",

"description": "$string:module_desc",

"mainElement": "EntryAbility",

"deviceTypes": [

"phone"

"deliveryWithInstall": true,

"installationFree": false,

"pages": "$profile:main_pages",

"abilities": [

{

"name": "EntryAbility",

"srcEntry": "./ets/entryability/EntryAbility.ets",

"description": "$string:EntryAbility_desc",

"icon": "$media:icon",

"label": "$string:EntryAbility_label",

"startWindowIcon": "$media:icon",

"startWindowBackground": "$color:start_window_background",

"exported": true,

"skills": [

{

"entities": [

"entity.system.home"

"actions": [

"action.system.home"

]

}

]

}

"requestPermissions": [

{

"name": "ohos.permission.INTERNET",

"reason": "$string:reason",

"usedScene": {

"abilities": [

"EntryAbility"

"when": "inuse"

}

]

}

下载源码

NewsRelease 下载

官网地址

新闻发布

往HarmonyOS模拟器相册添加图片

继续阅读 →

HarmonyOS第一课07：案例-HTTPS请求过程

继续阅读 →

HarmonyOS第一课07：案例-新闻数据加载

继续阅读 →

HarmonyOS第一课07：HTTP数据请求

继续阅读 →

HarmonyOS第一课06：设置组件导航

关联章节

说明：本章代码基于HarmonyOS第一课06：通过结构化数据构建页面代码

页面效果

文件变动

代码

default

pages/Index.ets

import { QuickStartPage } from '@ohos/quickstart'
import { CourseLearning } from '@ohos/learning'
import { KnowledgeMap } from '@ohos/map'

@Entry
@Component
struct Index {
  @State currentIndex: number = 0
  private tabsController: TabsController = new TabsController()

  @Builder
  tabBarBuilder(title: string, targetIndex: number, selectedIcon: Resource, unselectIcon: Resource) {
    Column() {
      Image(this.currentIndex === targetIndex ? selectedIcon : unselectIcon)
        .width(24)
        .height(24)

      Text(title)
        .fontFamily('HarmonyHeiTi-Medium')
        .fontSize(10)
        .fontColor(this.currentIndex === targetIndex ? '#0A59F7' : 'rgba(0,0,0,0.6)')
        .textAlign(TextAlign.Center)
        .lineHeight(14)
        .fontWeight(500)
    }
    .width('100%')
    .height('100%')
    .justifyContent(FlexAlign.Center)
    .alignItems(HorizontalAlign.Center)
    .onClick(() => {
      this.currentIndex = targetIndex
      this.tabsController.changeIndex(targetIndex)
    })
  }

  build() {
    Tabs({ barPosition: BarPosition.End, controller: this.tabsController }) {
      TabContent() {
        QuickStartPage()
      }
      .tabBar(this.tabBarBuilder('快速入门', 0, $r('app.media.ic_01_on'), $r('app.media.ic_01_off')))

      TabContent() {
        CourseLearning()
      }
      .tabBar(this.tabBarBuilder('课程学习', 1, $r('app.media.ic_02_on'), $r('app.media.ic_02_off')))

      TabContent() {
        KnowledgeMap()
      }
      .tabBar(this.tabBarBuilder('知识地图', 2, $r('app.media.ic_03_on'), $r('app.media.ic_03_off')))

    }
    .scrollable(false)
    .vertical(false)
    .divider({
      strokeWidth: 0.5,
      color: '#0D182431'
    })
    .backgroundColor('#F1F3F5')
    .padding({ top: 36, bottom: 28 })
  }
}

import { QuickStartPage } from '@ohos/quickstart'

import { CourseLearning } from '@ohos/learning'

import { KnowledgeMap } from '@ohos/map'

@Entry

@Component

struct Index {

@State currentIndex: number = 0

private tabsController: TabsController = new TabsController()

@Builder

tabBarBuilder(title: string, targetIndex: number, selectedIcon: Resource, unselectIcon: Resource) {

Column() {

Image(this.currentIndex === targetIndex ? selectedIcon : unselectIcon)

.width(24)

.height(24)

Text(title)

.fontFamily('HarmonyHeiTi-Medium')

.fontSize(10)

.fontColor(this.currentIndex === targetIndex ? '#0A59F7' : 'rgba(0,0,0,0.6)')

.textAlign(TextAlign.Center)

.lineHeight(14)

.fontWeight(500)

}

.width('100%')

.height('100%')

.justifyContent(FlexAlign.Center)

.alignItems(HorizontalAlign.Center)

.onClick(() => {

this.currentIndex = targetIndex

this.tabsController.changeIndex(targetIndex)

})

}

build() {

Tabs({ barPosition: BarPosition.End, controller: this.tabsController }) {

TabContent() {

QuickStartPage()

}

.tabBar(this.tabBarBuilder('快速入门', 0, $r('app.media.ic_01_on'), $r('app.media.ic_01_off')))

TabContent() {

CourseLearning()

}

.tabBar(this.tabBarBuilder('课程学习', 1, $r('app.media.ic_02_on'), $r('app.media.ic_02_off')))

TabContent() {

KnowledgeMap()

}

.tabBar(this.tabBarBuilder('知识地图', 2, $r('app.media.ic_03_on'), $r('app.media.ic_03_off')))

}

.scrollable(false)

.vertical(false)

.divider({

strokeWidth: 0.5,

color: '#0D182431'

})

.backgroundColor('#F1F3F5')

.padding({ top: 36, bottom: 28 })

}

map

pages/KnowledgeMap.ets

import { NavBarItemType, NavBarItem } from '../view/NavBarItem'
import { KnowledgeMapContent, Section } from '../view/KnowledgeMapContent'
import { BusinessError } from '@kit.BasicServicesKit'
import { util } from '@kit.ArkTS'

@Component
export struct KnowledgeMap {
  @State navBarList: NavBarItemType[] = [
    { order: '01', title: '准备与学习' },
    { order: '02', title: '构建应用' },
    { order: '03', title: '应用测试' },
    { order: '04', title: '上架' },
    { order: '05', title: '运营增长' },
    { order: '06', title: '商业变现' },
    { order: '07', title: '更多' }
  ]
  @State sections: Section[] = []
  @Provide('knowledgeMapPageStack') knowledgeMapPageStack: NavPathStack = new NavPathStack()
  @State currentNavBarIndex: number = -1

  @Builder
  PageMap(name: string) {
    if (name === 'KnowledgeMapContent') {
      KnowledgeMapContent({ section: this.sections[this.currentNavBarIndex] })
    }
  }

  private getSections() {
    try {
      getContext(this).resourceManager.getRawFileContent("MapData.json", (error: BusinessError, value: Uint8Array) => {
        const textDecoder = util.TextDecoder.create('utf-8')
        const res = textDecoder.decodeWithStream(value, {
          stream: false
        })
        this.sections = JSON.parse(res)
      })
    } catch (error) {
      console.error(`callback getRawFileContent failed, error is ${JSON.stringify(error)}`)
    }
  }

  aboutToAppear(): void {
    this.getSections()
  }

  build() {
    Navigation(this.knowledgeMapPageStack) {
      Scroll() {
        Column() {
          Text('知识地图')
            .fontFamily('HarmonyHeiTi-Bold')
            .fontSize(24)
            .fontColor(Color.Black)
            .textAlign(TextAlign.Start)
            .lineHeight(33)
            .fontWeight(700)
            .width('100%')

          Image($r('app.media.knowledge_map_banner'))
            .width('100%')
            .borderRadius(16)
            .margin({ top: 19, bottom: 8 })

          Text('通过循序渐进的学习路径，无经验和有经验的开发者都可以轻松掌握ArkTS语言声明式开发范式，体验更简洁、更友好的HarmonyOS应用开发旅程。')
            .fontFamily('HarmonyHeiti')
            .fontSize(14)
            .fontColor('rgba(0, 0, 0, 0.6)')
            .fontWeight(400)
            .textAlign(TextAlign.Start)

          List({ space: 12 }) {
            ForEach(this.navBarList, (item: NavBarItemType, index: number) => {
              ListItem() {
                NavBarItem({ navBarItem: item, currentNavBarIndex: this.currentNavBarIndex })
              }
              .width('100%')
            }, (item: NavBarItemType): string => item.title)
          }
          .width('100%')
          .margin({ top: 24 })
        }
        .padding({
          top: 12,
          right: 16,
          bottom: 12,
          left: 16
        })
        .backgroundColor("#F1F3F5")
      }
      .backgroundColor('#F1F3F5')
      .align(Alignment.TopStart)
      .constraintSize({ minHeight: '100%' })
      .edgeEffect(EdgeEffect.Spring)
    }
    .hideTitleBar(true)
    .navDestination(this.PageMap)
    .mode(NavigationMode.Stack)
  }
}

100

import { NavBarItemType, NavBarItem } from '../view/NavBarItem'

import { KnowledgeMapContent, Section } from '../view/KnowledgeMapContent'

import { BusinessError } from '@kit.BasicServicesKit'

import { util } from '@kit.ArkTS'

@Component

export struct KnowledgeMap {

@State navBarList: NavBarItemType[] = [

{ order: '01', title: '准备与学习' },

{ order: '02', title: '构建应用' },

{ order: '03', title: '应用测试' },

{ order: '04', title: '上架' },

{ order: '05', title: '运营增长' },

{ order: '06', title: '商业变现' },

{ order: '07', title: '更多' }

]

@State sections: Section[] = []

@Provide('knowledgeMapPageStack') knowledgeMapPageStack: NavPathStack = new NavPathStack()

@State currentNavBarIndex: number = -1

@Builder

PageMap(name: string) {

if (name === 'KnowledgeMapContent') {

KnowledgeMapContent({ section: this.sections[this.currentNavBarIndex] })

}

private getSections() {

try {

getContext(this).resourceManager.getRawFileContent("MapData.json", (error: BusinessError, value: Uint8Array) => {

const textDecoder = util.TextDecoder.create('utf-8')

const res = textDecoder.decodeWithStream(value, {

stream: false

})

this.sections = JSON.parse(res)

})

} catch (error) {

console.error(`callback getRawFileContent failed, error is ${JSON.stringify(error)}`)

}

aboutToAppear(): void {

this.getSections()

}

build() {

Navigation(this.knowledgeMapPageStack) {

Scroll() {

Column() {

Text('知识地图')

.fontFamily('HarmonyHeiTi-Bold')

.fontSize(24)

.fontColor(Color.Black)

.textAlign(TextAlign.Start)

.lineHeight(33)

.fontWeight(700)

.width('100%')

Image($r('app.media.knowledge_map_banner'))

.width('100%')

.borderRadius(16)

.margin({ top: 19, bottom: 8 })

Text('通过循序渐进的学习路径，无经验和有经验的开发者都可以轻松掌握ArkTS语言声明式开发范式，体验更简洁、更友好的HarmonyOS应用开发旅程。')

.fontFamily('HarmonyHeiti')

.fontSize(14)

.fontColor('rgba(0, 0, 0, 0.6)')

.fontWeight(400)

.textAlign(TextAlign.Start)

List({ space: 12 }) {

ForEach(this.navBarList, (item: NavBarItemType, index: number) => {

ListItem() {

NavBarItem({ navBarItem: item, currentNavBarIndex: this.currentNavBarIndex })

}

.width('100%')

}, (item: NavBarItemType): string => item.title)

}

.width('100%')

.margin({ top: 24 })

}

.padding({

top: 12,

right: 16,

bottom: 12,

left: 16

})

.backgroundColor("#F1F3F5")

}

.backgroundColor('#F1F3F5')

.align(Alignment.TopStart)

.constraintSize({ minHeight: '100%' })

.edgeEffect(EdgeEffect.Spring)

}

.hideTitleBar(true)

.navDestination(this.PageMap)

.mode(NavigationMode.Stack)

}

view/KnowledgeMapContent.ets

interface KnowledgeBaseItem {
  type: string,
  title: string
}

interface Material {
  subtitle: string,
  knowledgeBase: KnowledgeBaseItem[]
}

export interface Section {
  title: string,
  brief: string,
  materials: Material[]
}

const TypeMapIcon: Record<string, string> = {
  '指南': 'app.media.ic_guide',
  '准备': 'app.media.ic_prepare',
  '学习与获取证书': 'app.media.ic_medals',
  '视频教程': 'app.media.ic_video'
}

@Component
export struct KnowledgeMapContent {
  @Prop section: Section

  @Builder
  KnowledgeBlockLine(knowledgeBaseItem: KnowledgeBaseItem) {
    Row() {
      Image($r(TypeMapIcon[knowledgeBaseItem.type]))
        .width(20)
        .height(20)
      Column() {
        Text(knowledgeBaseItem.title)
          .fontFamily('HarmonyHeiTi-Medium')
          .fontSize(16)
          .fontWeight(500)

        Text(knowledgeBaseItem.type)
          .fontFamily('HarmonyHeiTi')
          .fontSize(14)
          .fontWeight(400)
      }
      .alignItems(HorizontalAlign.Start)
      .margin({ left: 18 })

      Blank()

      Image($r('app.media.ic_arrow'))
        .width(12)
        .height(24)
    }
    .width('100%')
    .height(64)
    .alignItems(VerticalAlign.Center)
  }

  @Builder
  KnowledgeBlock(material: Material) {
    Column() {
      Text(material.subtitle)
        .fontFamily('HarmonyHeiTi-Medium')
        .fontSize(14)
        .fontWeight(500)
        .margin({ bottom: 8 })

      List({ space: 12 }) {
        ForEach(material.knowledgeBase, (item: KnowledgeBaseItem, index: number) => {
          ListItem() {
            this.KnowledgeBlockLine(item)
          }
        }, (item: KnowledgeBaseItem, index: number) => item.title)
      }
      .backgroundColor(Color.White)
      .borderRadius(16)
      .padding({ left: 12, right: 12 })
      .divider({
        strokeWidth: 0.5,
        startMargin: 38,
        endMargin: 0,
        color: '#F2F2F2'
      })
    }
    .width('100%')
    .margin({ top: 28 })
    .alignItems(HorizontalAlign.Start)
  }

  build() {
    NavDestination() {
      Scroll() {
        Column() {
          Text(this.section.title)
            .fontFamily('HarmonyHeiTi-Bold')
            .fontSize(20)
            .fontWeight(700)
            .fontColor(Color.Black)

          Text(this.section.brief)
            .fontFamily('HarmonyHeiTi')
            .fontSize(12)
            .fontColor('rgba(0, 0, 0, 0.6)')
            .textAlign(TextAlign.JUSTIFY)
            .fontWeight(400)
            .margin({ top: 12 })

          ForEach(this.section.materials, (material: Material) => {
            this.KnowledgeBlock(material)
          }, (material: Material, index: number) => material.subtitle)
        }
        .alignItems(HorizontalAlign.Start)
        .padding({
          top: 12,
          left: 16,
          bottom: 12,
          right: 16
        })
        .backgroundColor('#F1F3F5')
        .width('100%')
      }
      .align(Alignment.TopStart)
      .constraintSize({ minHeight: '100%' })
      .edgeEffect(EdgeEffect.Spring)
      .scrollable(ScrollDirection.Vertical)
      .scrollBar(BarState.Auto)
      .backgroundColor('#F1F3F5')
    }
    .hideTitleBar(true)
  }
}

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interface KnowledgeBaseItem {

type: string,

title: string

}

interface Material {

subtitle: string,

knowledgeBase: KnowledgeBaseItem[]

}

export interface Section {

title: string,

brief: string,

materials: Material[]

}

const TypeMapIcon: Record<string, string> = {

'指南': 'app.media.ic_guide',

'准备': 'app.media.ic_prepare',

'学习与获取证书': 'app.media.ic_medals',

'视频教程': 'app.media.ic_video'

}

@Component

export struct KnowledgeMapContent {

@Prop section: Section

@Builder

KnowledgeBlockLine(knowledgeBaseItem: KnowledgeBaseItem) {

Row() {

Image($r(TypeMapIcon[knowledgeBaseItem.type]))

.width(20)

.height(20)

Column() {

Text(knowledgeBaseItem.title)

.fontFamily('HarmonyHeiTi-Medium')

.fontSize(16)

.fontWeight(500)

Text(knowledgeBaseItem.type)

.fontFamily('HarmonyHeiTi')

.fontSize(14)

.fontWeight(400)

}

.alignItems(HorizontalAlign.Start)

.margin({ left: 18 })

Blank()

Image($r('app.media.ic_arrow'))

.width(12)

.height(24)

}

.width('100%')

.height(64)

.alignItems(VerticalAlign.Center)

}

@Builder

KnowledgeBlock(material: Material) {

Column() {

Text(material.subtitle)

.fontFamily('HarmonyHeiTi-Medium')

.fontSize(14)

.fontWeight(500)

.margin({ bottom: 8 })

List({ space: 12 }) {

ForEach(material.knowledgeBase, (item: KnowledgeBaseItem, index: number) => {

ListItem() {

this.KnowledgeBlockLine(item)

}

}, (item: KnowledgeBaseItem, index: number) => item.title)

}

.backgroundColor(Color.White)

.borderRadius(16)

.padding({ left: 12, right: 12 })

.divider({

strokeWidth: 0.5,

startMargin: 38,

endMargin: 0,

color: '#F2F2F2'

})

}

.width('100%')

.margin({ top: 28 })

.alignItems(HorizontalAlign.Start)

}

build() {

NavDestination() {

Scroll() {

Column() {

Text(this.section.title)

.fontFamily('HarmonyHeiTi-Bold')

.fontSize(20)

.fontWeight(700)

.fontColor(Color.Black)

Text(this.section.brief)

.fontFamily('HarmonyHeiTi')

.fontSize(12)

.fontColor('rgba(0, 0, 0, 0.6)')

.textAlign(TextAlign.JUSTIFY)

.fontWeight(400)

.margin({ top: 12 })

ForEach(this.section.materials, (material: Material) => {

this.KnowledgeBlock(material)

}, (material: Material, index: number) => material.subtitle)

}

.alignItems(HorizontalAlign.Start)

.padding({

top: 12,

left: 16,

bottom: 12,

right: 16

})

.backgroundColor('#F1F3F5')

.width('100%')

}

.align(Alignment.TopStart)

.constraintSize({ minHeight: '100%' })

.edgeEffect(EdgeEffect.Spring)

.scrollable(ScrollDirection.Vertical)

.scrollBar(BarState.Auto)

.backgroundColor('#F1F3F5')

}

.hideTitleBar(true)

}

view/NavBarItem.ets

export interface NavBarItemType {
  order: string
  title: string
}

@Component
export struct NavBarItem {
  @Prop navBarItem: NavBarItemType
  @Consume('knowledgeMapPageStack') knowledgeMapPageStack: NavPathStack
  @Link currentNavBarIndex: number

  build() {
    Row() {
      Text(this.navBarItem.order)
        .margin({ right: 6 })
        .fontFamily('HarmonyHeiti-Bold')
        .fontSize(21)
        .fontColor('#182431')
        .textAlign(TextAlign.Start)
        .lineHeight(22)
        .fontWeight(700)

      Text(this.navBarItem.title)
        .fontFamily('HarmonyHeiti-Medium')
        .fontSize(16)
        .fontColor('#182431')
        .lineHeight(22)
        .fontWeight(500)

      Blank()

      Image($r('app.media.ic_arrow'))
        .width(12)
        .height(24)
    }
    .width('100%')
    .height(48)
    .borderRadius(16)
    .alignItems(VerticalAlign.Center)
    .padding({ left: 12, right: 12 })
    .backgroundColor(
      this.currentNavBarIndex === Number(this.navBarItem.order) - 1 ?
        '#1A0A59F7' :
      Color.Transparent
    )
    .onClick(() => {
      const index = Number(this.navBarItem.order) - 1
      this.currentNavBarIndex = index
      this.knowledgeMapPageStack.replacePath({ name: 'KnowledgeMapContent' })
    })

  }
}

export interface NavBarItemType {

order: string

title: string

}

@Component

export struct NavBarItem {

@Prop navBarItem: NavBarItemType

@Consume('knowledgeMapPageStack') knowledgeMapPageStack: NavPathStack

@Link currentNavBarIndex: number

build() {

Row() {

Text(this.navBarItem.order)

.margin({ right: 6 })

.fontFamily('HarmonyHeiti-Bold')

.fontSize(21)

.fontColor('#182431')

.textAlign(TextAlign.Start)

.lineHeight(22)

.fontWeight(700)

Text(this.navBarItem.title)

.fontFamily('HarmonyHeiti-Medium')

.fontSize(16)

.fontColor('#182431')

.lineHeight(22)

.fontWeight(500)

Blank()

Image($r('app.media.ic_arrow'))

.width(12)

.height(24)

}

.width('100%')

.height(48)

.borderRadius(16)

.alignItems(VerticalAlign.Center)

.padding({ left: 12, right: 12 })

.backgroundColor(

this.currentNavBarIndex === Number(this.navBarItem.order) - 1 ?

'#1A0A59F7' :

Color.Transparent

)

.onClick(() => {

const index = Number(this.navBarItem.order) - 1

this.currentNavBarIndex = index

this.knowledgeMapPageStack.replacePath({ name: 'KnowledgeMapContent' })

})

}

quickstart

pages/QuickStartPage.ets

import { TutorialView } from '../view/TutorialView'
import { Banner } from '../view/Banner'
import { EnablementView } from '../view/EnablementView'
import { ArticleClass } from '../model/ArticleClass'
import { BannerClass } from '../model/BannerClass'
import { ArticleDetailPage } from './ArticleDetailPage'
import { BannerDetailPage } from './BannerDetailPage'

@Component
export struct QuickStartPage {
  @State message: string = '快速入门'
  @Provide('articlePathStack') articlePathStack: NavPathStack = new NavPathStack()

  @Builder
  quickStartRouter(name: string, param?: ArticleClass | BannerClass) {
    if (name === 'articleDetail') {
      ArticleDetailPage()
    } else if (name === 'bannerDetailPage') {
      BannerDetailPage()
    }
  }

  build() {
    Navigation(this.articlePathStack) {
      Column() {
        Text(this.message)
          .fontFamily('HarmonyHeiTi-Bold')
          .fontSize(24)
          .fontWeight(700)
          .lineHeight(33)
          .width('100%')
          .textAlign(TextAlign.Start)
          .margin({ left: 16 })

        Scroll() {
          Column() {
            Banner()
            EnablementView()
            TutorialView()
          }
        }
        .layoutWeight(1)
        .scrollBar(BarState.Off)
        .align(Alignment.TopStart)

      }
      .height('100%')
      .width('100%')
      .backgroundColor('#F1F3F5')
    }
    .navDestination(this.quickStartRouter)
    .hideTitleBar(true)
    .mode(NavigationMode.Stack)
  }
}

import { TutorialView } from '../view/TutorialView'

import { Banner } from '../view/Banner'

import { EnablementView } from '../view/EnablementView'

import { ArticleClass } from '../model/ArticleClass'

import { BannerClass } from '../model/BannerClass'

import { ArticleDetailPage } from './ArticleDetailPage'

import { BannerDetailPage } from './BannerDetailPage'

@Component

export struct QuickStartPage {

@State message: string = '快速入门'

@Provide('articlePathStack') articlePathStack: NavPathStack = new NavPathStack()

@Builder

quickStartRouter(name: string, param?: ArticleClass | BannerClass) {

if (name === 'articleDetail') {

ArticleDetailPage()

} else if (name === 'bannerDetailPage') {

BannerDetailPage()

}

build() {

Navigation(this.articlePathStack) {

Column() {

Text(this.message)

.fontFamily('HarmonyHeiTi-Bold')

.fontSize(24)

.fontWeight(700)

.lineHeight(33)

.width('100%')

.textAlign(TextAlign.Start)

.margin({ left: 16 })

Scroll() {

Column() {

Banner()

EnablementView()

TutorialView()

}

.layoutWeight(1)

.scrollBar(BarState.Off)

.align(Alignment.TopStart)

}

.height('100%')

.width('100%')

.backgroundColor('#F1F3F5')

}

.navDestination(this.quickStartRouter)

.hideTitleBar(true)

.mode(NavigationMode.Stack)

}

pages/ArticleDetailPage.ets

import { ArticleClass } from '../model/ArticleClass'
import { webview } from '@kit.ArkWeb'

@Preview
@Component
export struct ArticleDetailPage {
  @State articleDetail: ArticleClass | null = null
  @Consume('articlePathStack') articlePathStack: NavPathStack

  aboutToAppear(): void {
    this.articleDetail = this.articlePathStack.getParamByName('articleDetail')[0] as ArticleClass
  }

  build() {
    NavDestination() {
      Column() {
        Row() {
          Row() {

            Image($r('app.media.ic_back'))
              .width(40)
              .height(40)
              .onClick(() => {
                this.articlePathStack.pop()
              })
            Row() {
              Text(this.articleDetail?.title)
                .fontFamily('HarmonyHeiTi-Bold')
                .fontSize(20)
                .textAlign(TextAlign.Center)
                .textOverflow({ overflow: TextOverflow.Ellipsis })
                .maxLines(1)
                .fontWeight(700)
                .margin({ left: 8 })
            }
          }
          .width('80%')
        }
        .justifyContent(FlexAlign.SpaceBetween)
        .width('100%')
        .height(56)

        WebComponent({ articleDetail: this.articleDetail })
      }
      .padding({ left: 16, right: 16 })
      .width('100%')
      .width('100%')
      .height('100%')
      .justifyContent(FlexAlign.SpaceBetween)
    }
    .hideTitleBar(true)
  }
}


@Component
struct WebComponent {
  @Prop articleDetail: ArticleClass | null
  private webviewController: webview.WebviewController = new webview.WebviewController()

  build() {
    Column() {
      Web({ src: this.articleDetail?.webUrl, controller: this.webviewController })
        .darkMode(WebDarkMode.Auto)
        .domStorageAccess(true)
        .zoomAccess(true)
        .fileAccess(true)
        .mixedMode(MixedMode.All)
        .cacheMode(CacheMode.None)
        .javaScriptAccess(true)
        .width('100%')
        .layoutWeight(1)
    }
  }
}

import { ArticleClass } from '../model/ArticleClass'

import { webview } from '@kit.ArkWeb'

@Preview

@Component

export struct ArticleDetailPage {

@State articleDetail: ArticleClass | null = null

@Consume('articlePathStack') articlePathStack: NavPathStack

aboutToAppear(): void {

this.articleDetail = this.articlePathStack.getParamByName('articleDetail')[0] as ArticleClass

}

build() {

NavDestination() {

Column() {

Row() {

Image($r('app.media.ic_back'))

.width(40)

.height(40)

.onClick(() => {

this.articlePathStack.pop()

})

Row() {

Text(this.articleDetail?.title)

.fontFamily('HarmonyHeiTi-Bold')

.fontSize(20)

.textAlign(TextAlign.Center)

.textOverflow({ overflow: TextOverflow.Ellipsis })

.maxLines(1)

.fontWeight(700)

.margin({ left: 8 })

}

.width('80%')

}

.justifyContent(FlexAlign.SpaceBetween)

.width('100%')

.height(56)

WebComponent({ articleDetail: this.articleDetail })

}

.padding({ left: 16, right: 16 })

.width('100%')

.height('100%')

.justifyContent(FlexAlign.SpaceBetween)

}

.hideTitleBar(true)

}

@Component

struct WebComponent {

@Prop articleDetail: ArticleClass | null

private webviewController: webview.WebviewController = new webview.WebviewController()

build() {

Column() {

Web({ src: this.articleDetail?.webUrl, controller: this.webviewController })

.darkMode(WebDarkMode.Auto)

.domStorageAccess(true)

.zoomAccess(true)

.fileAccess(true)

.mixedMode(MixedMode.All)

.cacheMode(CacheMode.None)

.javaScriptAccess(true)

.width('100%')

.layoutWeight(1)

}

pages/BannerDetailPage.ets

import { BannerClass } from '../model/BannerClass'
import { webview } from '@kit.ArkWeb'

@Component
export struct BannerDetailPage {
  @State bannerClass: BannerClass | null = null
  controller: webview.WebviewController = new webview.WebviewController()
  @Consume('articlePathStack') articlePathStack: NavPathStack

  aboutToAppear(): void {
    this.bannerClass = this.articlePathStack.getParamByName('bannerDetailPage')[0] as BannerClass
  }

  build() {
    NavDestination() {
      Column() {
        Web({
          src: this.bannerClass?.url,
          controller: this.controller
        })
          .darkMode(WebDarkMode.Auto)
          .domStorageAccess(true)
          .zoomAccess(true)
          .fileAccess(true)
          .mixedMode(MixedMode.All)
          .javaScriptAccess(true)
          .width('100%')
          .layoutWeight(1)
      }
    }
    .width('100%')
    .height('100%')

  }
}

import { BannerClass } from '../model/BannerClass'

import { webview } from '@kit.ArkWeb'

@Component

export struct BannerDetailPage {

@State bannerClass: BannerClass | null = null

controller: webview.WebviewController = new webview.WebviewController()

@Consume('articlePathStack') articlePathStack: NavPathStack

aboutToAppear(): void {

this.bannerClass = this.articlePathStack.getParamByName('bannerDetailPage')[0] as BannerClass

}

build() {

NavDestination() {

Column() {

Web({

src: this.bannerClass?.url,

controller: this.controller

})

.darkMode(WebDarkMode.Auto)

.domStorageAccess(true)

.zoomAccess(true)

.fileAccess(true)

.mixedMode(MixedMode.All)

.javaScriptAccess(true)

.width('100%')

.layoutWeight(1)

}

.width('100%')

.height('100%')

}

view/Banner.ets

import { BannerClass } from '../model/BannerClass'
import { bufferToString } from '../util/BufferUtil'

@Preview
@Component
export struct Banner {
  @State bannerList: BannerClass[] = []
  @Consume('articlePathStack') articlePathStack: NavPathStack

  getBannerDataFromJSON() {
    getContext(this).resourceManager.getRawFileContent('BannerData.json').then(value => {
      // 获取buffer内容
      // let buffer: ArrayBufferLike = value.buffer

      // 转换为字符串
      // let res: string = bufferToString(buffer)

      // 解析为数据结构
      // this.bannerList = JSON.parse(res) as BannerClass[]

      // 简写
      this.bannerList = JSON.parse(bufferToString(value.buffer)) as BannerClass[]
    })
  }

  aboutToAppear(): void {
    this.getBannerDataFromJSON()
  }

  build() {
    Swiper() {
      ForEach(this.bannerList, (item: BannerClass, index: number) => {
        Image($r(item.imageSrc))
          .objectFit(ImageFit.Contain)
          .width('100%')
          .padding({ top: 11, left: 16, right: 16 })
          .borderRadius(16)
          .onClick(() => {
            this.articlePathStack.pushPathByName('bannerDetailPage', item)
          })
      }, (item: BannerClass, index: number) => item.id)
    }
    .autoPlay(true)
    .loop(true)
    .indicator(
      new DotIndicator()
        .color('#1a000000')
        .selectedColor('#0A59F7')
    )

  }
}

import { BannerClass } from '../model/BannerClass'

import { bufferToString } from '../util/BufferUtil'

@Preview

@Component

export struct Banner {

@State bannerList: BannerClass[] = []

@Consume('articlePathStack') articlePathStack: NavPathStack

getBannerDataFromJSON() {

getContext(this).resourceManager.getRawFileContent('BannerData.json').then(value => {

// 获取buffer内容

// let buffer: ArrayBufferLike = value.buffer

// 转换为字符串

// let res: string = bufferToString(buffer)

// 解析为数据结构

// this.bannerList = JSON.parse(res) as BannerClass[]

// 简写

this.bannerList = JSON.parse(bufferToString(value.buffer)) as BannerClass[]

})

}

aboutToAppear(): void {

this.getBannerDataFromJSON()

}

build() {

Swiper() {

ForEach(this.bannerList, (item: BannerClass, index: number) => {

Image($r(item.imageSrc))

.objectFit(ImageFit.Contain)

.width('100%')

.padding({ top: 11, left: 16, right: 16 })

.borderRadius(16)

.onClick(() => {

this.articlePathStack.pushPathByName('bannerDetailPage', item)

})

}, (item: BannerClass, index: number) => item.id)

}

.autoPlay(true)

.loop(true)

.indicator(

new DotIndicator()

.color('#1a000000')

.selectedColor('#0A59F7')

)

}

view/EnablementView.ets

import { ArticleClass } from '../model/ArticleClass'
import { bufferToString } from '../util/BufferUtil'

@Component
struct EnablementItem {
  @Prop enablementItem: ArticleClass

  build() {
    Column() {
      Image($r(this.enablementItem.imageSrc))
        .width('100%')
        .objectFit(ImageFit.Cover)
        .height(96)
        .borderRadius({
          topLeft: 16,
          topRight: 16
        })

      Text(this.enablementItem.title)
        .height(19)
        .width('100%')
        .fontSize(14)
        .textAlign(TextAlign.Start)
        .textOverflow({ overflow: TextOverflow.Ellipsis })
        .maxLines(1)
        .fontWeight(400)
        .padding({ left: 12, right: 12 })
        .margin({ top: 8 })
      Text(this.enablementItem.brief)
        .height(32)
        .width('100%')
        .fontSize(12)
        .textAlign(TextAlign.Start)
        .textOverflow({ overflow: TextOverflow.Ellipsis })
        .maxLines(2)
        .fontWeight(400)
        .fontColor('rgba(0, 0, 0, 0.6)')
        .padding({ left: 12, right: 12 })
        .margin({ top: 2 })
    }
    .width(160)
    .height(169)
    .borderRadius(16)
    .backgroundColor(Color.White)
  }
}


@Preview
@Component
export struct EnablementView {
  @State enablementList: Array<ArticleClass> = []
  @Consume('articlePathStack') articlePathStack: NavPathStack

  aboutToAppear(): void {
    this.getEnablementDataFromJSON()
  }

  getEnablementDataFromJSON() {
    getContext(this).resourceManager.getRawFileContent('EnablementData.json').then(value => {
      this.enablementList = JSON.parse(bufferToString(value.buffer)) as ArticleClass[]
    })
  }

  build() {
    Column() {

      Text('赋能套件')
        .width('100%')
        .fontColor('#182431')
        .fontSize(16)
        .fontWeight(500)
        .fontFamily('HarmonyHeiTi-medium')
        .textAlign(TextAlign.Start)
        .padding({ left: 16 })
        .margin({ bottom: 8.5 })

      Grid() {
        ForEach(this.enablementList, (item: ArticleClass) => {
          GridItem() {
            EnablementItem({ enablementItem: item })
              .onClick(() => {
                this.articlePathStack.pushPathByName('articleDetail', item)
              })
          }
        }, (item: ArticleClass) => item.id)
      }
      .rowsTemplate('1fr')
      .columnsGap(8)
      .scrollBar(BarState.Off)
      .height(169)
      .padding({ top: 2, left: 16, right: 16 })
    }
    .width('100%')
    .margin({ top: 18 })
  }
}

import { ArticleClass } from '../model/ArticleClass'

import { bufferToString } from '../util/BufferUtil'

@Component

struct EnablementItem {

@Prop enablementItem: ArticleClass

build() {

Column() {

Image($r(this.enablementItem.imageSrc))

.width('100%')

.objectFit(ImageFit.Cover)

.height(96)

.borderRadius({

topLeft: 16,

topRight: 16

})

Text(this.enablementItem.title)

.height(19)

.width('100%')

.fontSize(14)

.textAlign(TextAlign.Start)

.textOverflow({ overflow: TextOverflow.Ellipsis })

.maxLines(1)

.fontWeight(400)

.padding({ left: 12, right: 12 })

.margin({ top: 8 })

Text(this.enablementItem.brief)

.height(32)

.width('100%')

.fontSize(12)

.textAlign(TextAlign.Start)

.textOverflow({ overflow: TextOverflow.Ellipsis })

.maxLines(2)

.fontWeight(400)

.fontColor('rgba(0, 0, 0, 0.6)')

.padding({ left: 12, right: 12 })

.margin({ top: 2 })

}

.width(160)

.height(169)

.borderRadius(16)

.backgroundColor(Color.White)

}

@Preview

@Component

export struct EnablementView {

@State enablementList: Array<ArticleClass> = []

@Consume('articlePathStack') articlePathStack: NavPathStack

aboutToAppear(): void {

this.getEnablementDataFromJSON()

}

getEnablementDataFromJSON() {

getContext(this).resourceManager.getRawFileContent('EnablementData.json').then(value => {

this.enablementList = JSON.parse(bufferToString(value.buffer)) as ArticleClass[]

})

}

build() {

Column() {

Text('赋能套件')

.width('100%')

.fontColor('#182431')

.fontSize(16)

.fontWeight(500)

.fontFamily('HarmonyHeiTi-medium')

.textAlign(TextAlign.Start)

.padding({ left: 16 })

.margin({ bottom: 8.5 })

Grid() {

ForEach(this.enablementList, (item: ArticleClass) => {

GridItem() {

EnablementItem({ enablementItem: item })

.onClick(() => {

this.articlePathStack.pushPathByName('articleDetail', item)

})

}

}, (item: ArticleClass) => item.id)

}

.rowsTemplate('1fr')

.columnsGap(8)

.scrollBar(BarState.Off)

.height(169)

.padding({ top: 2, left: 16, right: 16 })

}

.width('100%')

.margin({ top: 18 })

}

view/TutorialView.ets

import { ArticleClass } from '../model/ArticleClass'
import { bufferToString } from '../util/BufferUtil'


@Component
struct TutorialItem {
  @Prop tutorialItem: ArticleClass

  build() {
    Row() {
      Column() {
        Text(this.tutorialItem.title)
          .height(19)
          .width('100%')
          .fontSize(14)
          .textAlign(TextAlign.Start)
          .textOverflow({ overflow: TextOverflow.Ellipsis })
          .maxLines(1)
          .fontWeight(400)
          .margin({ top: 4 })
        Text(this.tutorialItem.brief)
          .height(32)
          .width('100%')
          .fontSize(12)
          .textAlign(TextAlign.Start)
          .textOverflow({ overflow: TextOverflow.Ellipsis })
          .maxLines(2)
          .fontWeight(400)
          .fontColor('rgba(0, 0, 0, 0.6)')
          .margin({ top: 5 })
      }
      .height('100%')
      .layoutWeight(1)
      .alignItems(HorizontalAlign.Start)
      .margin({ right: 12 })

      Image($r(this.tutorialItem.imageSrc))
        .height(64)
        .width(108)
        .objectFit(ImageFit.Cover)
        .borderRadius(16)

    }
    .width('100%')
    .height(88)
    .borderRadius(16)
    .backgroundColor(Color.White)
    .padding(12)
    .alignItems(VerticalAlign.Top)
  }
}

@Preview
@Component
export struct TutorialView {
  @State tutorialList: Array<ArticleClass> = []
  @Consume('articlePathStack') articlePathStack: NavPathStack

  aboutToAppear(): void {
    this.getTutorialDataFromJSON()
  }

  getTutorialDataFromJSON() {
    getContext(this).resourceManager.getRawFileContent('TutorialData.json').then(value => {
      this.tutorialList = JSON.parse(bufferToString(value.buffer)) as ArticleClass[]
    })
  }

  build() {

    Column() {
      Text('入门教程')
        .fontColor('#182431')
        .fontSize(16)
        .fontWeight(500)
        .fontFamily('HarmonyHeiTi-medium')
        .textAlign(TextAlign.Start)
        .padding({ left: 16 })
        .margin({ bottom: 8.5 })

      List({ space: 12 }) {
        ForEach(this.tutorialList, (item: ArticleClass) => {
          ListItem() {
            TutorialItem({ tutorialItem: item })
              .onClick(() => {
                this.articlePathStack.pushPathByName('articleDetail', item)
              })
          }
        }, (item: ArticleClass) => item.id)
      }
      .scrollBar(BarState.Off)
      .padding({ left: 16, right: 16 })

    }
    .width('100%')
    .margin({ top: 18 })
    .alignItems(HorizontalAlign.Start)

  }
}