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
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Urlstatic 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
