HarmonyOS系列

华为鸿蒙应用--底部导航栏Tabs（自适应手机和平板）-ArkTs_华为鸿蒙应用 csdn 底部导航栏-CSDN博客

华为鸿蒙应用--欢迎页SplashPage+倒计时跳过（自适应手机和平板）-ArkTs_app.media.ic_splash_page_background-CSDN博客

华为鸿蒙应用--封装数据持久化工具：首选项Preferences（鸿蒙工具）-ArkTs-CSDN博客

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效果

通过登录页实现HarmonyOS网络请求、自定义Loading、MD5密码加密、emitter订阅状态变化、持久化登录状态、隐藏软键盘

0、LoginPage.ets代码

import { Constants } from '@ohos/common/src/main/ets/constants/Constants'
import { Logger } from '@ohos/common/src/main/ets/utils/Logger'
import { loginModel } from '../viewmodel/types'
import { CustomDialogView, HttpUtils, PageConstants, PFUKey, PFUtils } from '@ohos/common'
import { Md5 } from 'ts-md5';
import router from '@ohos.router'
import inputMethod from '@ohos.inputMethod'

@Extend(Text) function text16fp333() {
  .fontColor($r('app.color.color_333333'))
  .fontSize($r('app.float.middle_font_size'))
  .fontWeight(FontWeight.Medium)
}

@Extend(TextInput) function inputTrBg() {
  .margin({
    left: $r('app.float.vp_thirty_two'),
    right: $r('app.float.vp_thirty_two') })
  .height(50)
  .backgroundColor($r('app.color.color_transparent'))
  .fontSize($r('app.float.middle_font_size'))
  .fontWeight(FontWeight.Medium)
}

@Extend(Line) function line() {
  .width(Constants.FULL_PARENT)
  .height($r('app.float.vp_zero_point_five'))
  .backgroundColor($r('app.color.color_E0E0E0'))
}


@Entry
@Component
struct LoginPage {
  private loginModel: loginModel;
  private account: string;
  private password: string;

  build() {
    RelativeContainer() {
      Column() {
        Image($r('app.media.img_logo'))
          .height(44)

        Text($r('app.string.str_login_by_password'))
          .fontColor($r('app.color.black'))
          .fontSize($r('app.float.bigger_font_size'))
          .margin({ top: $r('app.float.vp_ten') })
          .key("123")

      }
      .alignItems(HorizontalAlign.Start)
      .alignRules({
        top: { anchor: '__container__', align: VerticalAlign.Top },
        left: { anchor: '__container__', align: HorizontalAlign.Start }
      })
      .margin({ top: 80, left: $r('app.float.vp_thirty_two') })
      .id("c_top")

      Column() {
        Row() {
          Text($r('app.string.str_account'))
            .text16fp333()
          TextInput({ placeholder: $r('app.string.str_account_hint'), text: "13595432224" })
            .inputTrBg()
            .type(InputType.PhoneNumber)
            .onChange((value: string) => {
              this.account = value
            })
        };
        Line()
          .line()
        Row() {
          Text($r('app.string.str_password'))
            .text16fp333()
          TextInput({ placeholder: $r('app.string.str_password_hint'), text: "dho123456" })
            .inputTrBg()
            .type(InputType.Password)
            .onChange((value: string) => {
              this.password = value
            })
        };
        Line()
          .line()

        Button($r('app.string.str_login_now'), { type: ButtonType.Normal, stateEffect: true })
          .borderRadius($r('app.float.vp_five'))
          .backgroundColor($r('app.color.color_3662EC'))
          .width(Constants.FULL_PARENT)
          .margin({
            top: $r('app.float.vp_twenty')
          })
          .height($r('app.float.vp_forty'))
          .onClick(() => {
            let params = {
              user_id: this.account,
              password: Md5.hashStr(this.password) // md5加密密码
            }
            HttpUtils.post(HttpUtils.LOGIN_BY_PASSWORD_URL, params, true)
              .then((res) => {
                this.loginModel = JSON.parse(res)
                PFUtils.put(PFUKey.IS_LOGIN, true); // 首选项记录已经登录
                HttpUtils.defaultParams("token", this.loginModel.token) // 网络请求默认参数token（authorization）
                router.replaceUrl({ url: PageConstants.MAIN_PAGE_URL }) // 跳转首页
              })
          });
        Button($r('app.string.str_register_now'), { type: ButtonType.Normal, stateEffect: true })
          .borderRadius($r('app.float.vp_five'))
          .backgroundColor($r('app.color.color_transparent'))
          .borderStyle(BorderStyle.Solid)
          .borderWidth($r('app.float.vp_one'))
          .borderColor($r('app.color.color_3662EC'))
          .borderRadius($r('app.float.vp_five'))
          .width(Constants.FULL_PARENT)
          .fontColor($r('app.color.color_3662EC'))
          .margin({
            top: $r('app.float.vp_twenty')
          })
          .height($r('app.float.vp_forty'))
          .onClick(() => {
            HttpUtils.post(HttpUtils.USER_INFO_URL)
              .then((res) => {
                Logger.error(Constants.TAG, JSON.stringify(res))
              })
          })
      }
      .alignRules({
        center: { anchor: '__container__', align: VerticalAlign.Center },
        left: { anchor: '__container__', align: HorizontalAlign.Start }
      })
      .margin({
        left: $r('app.float.vp_thirty_two'),
        right: $r('app.float.vp_thirty_two')
      })
      .alignItems(HorizontalAlign.Start)
      .id("c_center")

      CustomDialogView().id("load");
    }
    .height('100%')
    .width("100%")
    .backgroundColor($r('app.color.color_F3F4F6'))
    .onClick(() => {
      let im = inputMethod.getController()
      im.stopInputSession() // 隐藏软键盘
    });

  }
}

1、网络请求HttpsUtils.ets

使用第三方Axios库：OpenHarmony-SIG/ohos_axios

使用该库时，在配置全局请求参数时失效（可能是我使用方法错误），所以自定义补充实现了：defaultParams方法

同时实现了网络请求的loading

import emitter from '@ohos.events.emitter';
import { EmitterId } from '../constants/EmitterId';
import axios, {
  AxiosError,
  AxiosResponse,
  AxiosProgressEvent,
  InternalAxiosRequestConfig,
  AxiosRequestConfig,
} from '@ohos/axios'
import { Constants } from '../constants/Constants';
import { HttpData, loginModel } from '../viewmodel/types';
import promptAction from '@ohos.promptAction';
import { Logger } from './Logger';
import { PFUtils } from './PFUtils';
import { PFUKey } from '../constants/PFUKey';

export interface param {
  paramKey: string,
  paramValue: string,
}

export class HttpUtils {
  static readonly BASE_URL: string = "http://192.168.1.10:10110/"; // 基础Url
  static readonly LOGIN_BY_PASSWORD_URL: string = "password/login"; // 密码登录
  static readonly USER_INFO_URL: string = "user/data"; // 用户信息

  static async defaultParams(key: string, value: string) {
    let param = { paramKey: key, paramValue: value }
    let arrParams: Array<param>
    PFUtils.get(PFUKey.DEFAULT_PARAMS).then((res: string) => {
      if (res === undefined) {
        arrParams = []
      } else {
        arrParams = JSON.parse(res);
      }
      let index = arrParams.findIndex(item => item.paramKey === key)
      if (index === -1) {
        arrParams.push(param)
      } else {
        arrParams[index].paramValue = value;
      }
      PFUtils.put(PFUKey.DEFAULT_PARAMS, JSON.stringify(arrParams))
    })
  }

  static async post(url: string, params?: any, noDefaultParam?: boolean) {
    if (params === undefined) {
      params = {}
    }
    let resp;
    this.showLoad(true);
    if (!noDefaultParam) {
      await PFUtils.get(PFUKey.DEFAULT_PARAMS).then((value: string) => {
        if (value !== undefined) {
          let arrParams: Array<param>;
          arrParams = JSON.parse(value);
          for (let index = 0; index < arrParams.length; index++) {
            const element = arrParams[index];
            params[element.paramKey] = element.paramValue
          }
        }
      })
    }
    Logger.debug(Constants.HTTP_TAG, "Url：" + this.BASE_URL + url)
    Logger.debug(Constants.HTTP_TAG, "Param：" + JSON.stringify(params))
    await axios.post(this.BASE_URL + url, params)
      .then((res: AxiosResponse<HttpData>) => {
        resp = JSON.stringify(res.data.data);
        setTimeout(() => {
          this.showLoad(false);
          promptAction.showToast({
            message: res.data.message
          })
        }, 500); // 延迟500毫秒隐藏Loading，
        Logger.debug(Constants.HTTP_TAG, "Data：" + resp)
      }).catch((err: AxiosError) => {
        setTimeout(() => {
          this.showLoad(false);
          promptAction.showToast({
            message: err.message
          })
        }, 500);
        resp = JSON.stringify(err)
        Logger.error(Constants.HTTP_TAG, "Err:" + JSON.stringify(err));
      });

    return resp;
  }

  static showLoad(show: boolean) {
    emitter.emit({
      eventId: EmitterId.LOAD_PROGRESS,
      priority: emitter.EventPriority.IMMEDIATE
    }, {
      data: {
        "showLoad": show
      }
    });
  }
}

0、HttpData、loginModel

export interface HttpData<T = any> {
  code?: number,
  message?: string,
  data?: T
}

export interface loginModel {
  token?: string,
  user_id?: string,
}

1.自定义loading

import emitter from '@ohos.events.emitter';
import { EmitterId } from '../../constants/EmitterId';
import { LoadingProgressDialog } from './LoadingProgressDialog'

export class CustomDialogCallback {
  confirmCallback: Function = () => {
  };
  cancelCallback: Function = () => {
  };
}

@Component
export struct CustomDialogView {
  @Provide dialogCallBack: CustomDialogCallback = new CustomDialogCallback();
  loadingDialog: CustomDialogController = new CustomDialogController({
    builder: LoadingProgressDialog(),
    autoCancel: true,
    customStyle: true
  });

  aboutToAppear() {
    let innerEvent = {
      eventId: EmitterId.LOAD_PROGRESS
    };
    emitter.on(innerEvent, (eventData) => {
      if (eventData.data.showLoad) {
        if (this.loadingDialog) {
          this.loadingDialog.open();
        }
      } else {
        if (this.loadingDialog) {
          this.loadingDialog.close();
        }
      }
    });
  }

  aboutToDisappear() {
    emitter.off(EmitterId.LOAD_PROGRESS)
  }

  build() {
  }
}


@CustomDialog
export struct LoadingProgressDialog {
  controller: CustomDialogController = new CustomDialogController({ builder: '' });

  build() {
    Column() {
      LoadingProgress()
        .width(80)
        .height(80)
        .color("#FF0000");
      Text("加载中...")
        .margin({ top: $r('app.float.vp_ten'), bottom: $r('app.float.vp_ten') });
    }
    .width(140)
    .height(160)
    .alignItems(HorizontalAlign.Center)
    .justifyContent(FlexAlign.Center)
    .borderRadius($r('app.float.vp_ten'))
    .backgroundColor($r('app.color.white'))
  }
}

总结

后面继续补充网络请求其他方法：get、delete、上传、下载等