前言:
各位同學(xué)有段時間沒有見面 因為一直很忙所以就沒有去更新博客。最近有在學(xué)習(xí)這個鴻蒙的ark ui開發(fā) 因為鴻蒙不是發(fā)布了一個鴻蒙next的測試版本 明年會啟動純血鴻蒙應(yīng)用 所以我就想提前給大家寫一些博客文章
效果圖

image.png

image.png
響應(yīng)數(shù)據(jù)效果

image.png
使用本地網(wǎng)絡(luò)服務(wù)

image.png
接口說明:
接口是我本地使用springboot 框架配合 hibernate 配合jpa寫的一個后臺服務(wù) :
客戶端具體實現(xiàn):
"requestPermissions": [
{
"name": "ohos.permission.INTERNET"
}
]
如圖
[圖片上傳失敗...(image-ee5038-1701866510795)]
網(wǎng)絡(luò)請求 工具類實現(xiàn)
import http from '@ohos.net.http';
import Constants, { ContentType } from '../constant/Constants';
import Logger from './Logger';
import { NewsData } from '../viewmodel/NewsData';
export function httpRequestGet(url: string) {
return httpRequest(url, http.RequestMethod.GET);
}
export function httpRequestPost(url: string, params?: NewsData) {
return httpRequest(url, http.RequestMethod.POST, params);
}
function httpRequest(url: string, method: http.RequestMethod,params?: NewsData){
let httpRequest = http.createHttp();
let responseResult = httpRequest.request(url, {
method: method,
readTimeout: Constants.HTTP_READ_TIMEOUT,//讀取超時時間 可選,默認為60000ms
header: {
'Content-Type': ContentType.JSON
},
connectTimeout: Constants.HTTP_READ_TIMEOUT,//連接超時時間 可選,默認為60000ms
extraData: params // 請求參數(shù)
});
return responseResult.then((value: http.HttpResponse)=>{
Logger.error("請求狀態(tài) --> "+value.responseCode)
if(value.responseCode===200){
Logger.error("請求成功");
let getresult = value.result;
Logger.error('請求返回數(shù)據(jù)', JSON.stringify(getresult));
return getresult;
}
}).catch((err)=>{
return "";
});
}
打印日志工具類實現(xiàn) :
import hilog from '@ohos.hilog';
class Logger {
private domain: number;
private prefix: string;
private format: string = '%{public}s, %{public}s';
/**
* constructor.
*
* @param Prefix Identifies the log tag.
* @param domain Domain Indicates the service domain, which is a hexadecimal integer ranging from 0x0 to 0xFFFFF.
*/
constructor(prefix: string = 'MyApp', 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('HTTPS', 0xFF00)
登錄界面實現(xiàn) :
/**
* 創(chuàng)建人:xuqing
* 創(chuàng)建時間:2023年8月2日08:38:50
* 類說明:
*
*
*/
import prompt from '@ohos.promptAction';
import router from '@ohos.router';
import CommonConstants from '../common/constant/CommonConstants';
import StyleConstant from '../common/constant/StyleConstant';
import { httpRequestGet } from '../common/utils/OKhttpUtil';
import CommonConstant from '../common/constant/CommonConstants';
import Logger from '../common/utils/Logger';
@Extend(TextInput) function inputStyle () {
.placeholderColor($r('app.color.placeholder_color'))
.height($r('app.float.login_input_height'))
.fontSize($r('app.float.big_text_size'))
.backgroundColor($r('app.color.background'))
.width(CommonConstants.FULL_PARENT)
.padding({ left: CommonConstants.INPUT_PADDING_LEFT })
.margin({ top: $r('app.float.input_margin_top') })
}
@Extend(Line) function lineStyle () {
.width(CommonConstants.FULL_PARENT)
.height($r('app.float.line_height'))
.backgroundColor($r('app.color.line_color'))
}
@Extend(Text) function blueTextStyle () {
.fontColor($r('app.color.login_blue_text_color'))
.fontSize($r('app.float.small_text_size'))
.fontWeight(FontWeight.Medium)
}
@Extend(Text) function blackTextStyle () {
.fontColor($r('app.color.black_text_color'))
.fontSize($r('app.float.big_text_size'))
.fontWeight(FontWeight.Medium)
}
/**
* Login page
*/
@Entry
@Component
struct LoginPage {
@State account: string = '';
@State password: string = '';
@State isShowProgress: boolean = false;
private timeOutId = null;
@Builder imageButton(src: Resource) {
Button({ type: ButtonType.Circle, stateEffect: true }) {
Image(src)
}
.height($r('app.float.other_login_image_size'))
.width($r('app.float.other_login_image_size'))
.backgroundColor($r('app.color.background'))
}
async login() {
if (this.account === '' || this.password === '') {
prompt.showToast({
message: $r('app.string.input_empty_tips')
})
} else {
let username:string='username=';
let password:string='&password=';
let networkurl=CommonConstant.LOGIN+username+this.account+password+this.password;
Logger.error("請求url "+networkurl);
await httpRequestGet(networkurl).then((data)=>{
console.log("data --- > "+data);
Logger.error("登錄請求回調(diào)結(jié)果 ---> " +data.toString());
let obj=JSON.parse(data.toString());
Logger.error("請求結(jié)果code -- > "+obj.code);
if(obj.code===200){
prompt.showToast({
message: $r('app.string.login_success')
})
}
});
}
}
aboutToDisappear() {
clearTimeout(this.timeOutId);
this.timeOutId = null;
}
build() {
Column() {
Image($r('app.media.logo'))
.width($r('app.float.logo_image_size'))
.height($r('app.float.logo_image_size'))
.margin({ top: $r('app.float.logo_margin_top'), bottom: $r('app.float.logo_margin_bottom') })
Text($r('app.string.login_page'))
.fontSize($r('app.float.page_title_text_size'))
.fontWeight(FontWeight.Medium)
.fontColor($r('app.color.title_text_color'))
Text($r('app.string.login_more'))
.fontSize($r('app.float.normal_text_size'))
.fontColor($r('app.color.login_more_text_color'))
.margin({ bottom: $r('app.float.login_more_margin_bottom'), top: $r('app.float.login_more_margin_top') })
Row() {
//賬號
Text($r('app.string.account')).blackTextStyle()
TextInput({ placeholder: $r('app.string.account') })
.maxLength(CommonConstants.INPUT_ACCOUNT_LENGTH)
.type(InputType.Number)
.inputStyle()
.onChange((value: string) => {
this.account = value;
}).margin({left:20})
}
.justifyContent(FlexAlign.SpaceBetween)
.width(CommonConstants.FULL_PARENT)
.margin({ top: $r('app.float.forgot_margin_top') })
Line().lineStyle().margin({left:80})
Row() {
//密碼
Text($r('app.string.password')).blackTextStyle()
TextInput({ placeholder: $r('app.string.password') })
.maxLength(CommonConstants.INPUT_PASSWORD_LENGTH)
.type(InputType.Password)
.inputStyle()
.onChange((value: string) => {
this.password = value;
}).margin({left:20})
}
.justifyContent(FlexAlign.SpaceBetween)
.width(CommonConstants.FULL_PARENT)
.margin({ top: $r('app.float.forgot_margin_top') })
Line().lineStyle().margin({left:80})
Row() {
//短信驗證碼登錄
Text($r('app.string.message_login')).blueTextStyle().onClick(()=>{
prompt.showToast({
message: $r('app.string.stay_tuned_during_feature_development')
})
})
//忘記密碼
Text($r('app.string.forgot_password')).blueTextStyle().onClick(()=>{
prompt.showToast({
message: $r('app.string.stay_tuned_during_feature_development')
})
})
}
.justifyContent(FlexAlign.SpaceBetween)
.width(CommonConstants.FULL_PARENT)
.margin({ top: $r('app.float.forgot_margin_top') })
Button($r('app.string.login'), { type: ButtonType.Capsule })
.width(CommonConstants.BUTTON_WIDTH)
.height($r('app.float.login_button_height'))
.fontSize($r('app.float.normal_text_size'))
.fontWeight(FontWeight.Medium)
.backgroundColor($r('app.color.login_button_color'))
.margin({ top: $r('app.float.login_button_margin_top'), bottom: $r('app.float.login_button_margin_bottom') })
.onClick(() => {
this.login();
})
Text($r('app.string.register_account')).onClick(()=>{
prompt.showToast({
message: $r('app.string.stay_tuned_during_feature_development')
})
}).fontColor($r('app.color.login_blue_text_color'))
.fontSize($r('app.float.normal_text_size'))
.fontWeight(FontWeight.Medium)
if (this.isShowProgress) {
LoadingProgress()
.color($r('app.color.loading_color'))
.width($r('app.float.login_progress_size'))
.height($r('app.float.login_progress_size'))
.margin({ top: $r('app.float.login_progress_margin_top') })
}
Blank()
}
.backgroundColor($r('app.color.background'))
.height(CommonConstants.FULL_PARENT)
.width(CommonConstants.FULL_PARENT)
.padding({
left: $r('app.float.page_padding_hor'),
right: $r('app.float.page_padding_hor'),
bottom: $r('app.float.login_page_padding_bottom')
})
}
}
點擊登錄拿到輸入數(shù)據(jù)和后臺交互
async login() {
if (this.account === '' || this.password === '') {
prompt.showToast({
message: $r('app.string.input_empty_tips')
})
} else {
let username:string='username=';
let password:string='&password=';
let networkurl=CommonConstant.LOGIN+username+this.account+password+this.password;
Logger.error("請求url "+networkurl);
await httpRequestGet(networkurl).then((data)=>{
console.log("data --- > "+data);
Logger.error("登錄請求回調(diào)結(jié)果 ---> " +data.toString());
let obj=JSON.parse(data.toString());
Logger.error("請求結(jié)果code -- > "+obj.code);
if(obj.code===200){
prompt.showToast({
message: $r('app.string.login_success')
})
}
});
}
}
這邊我們拿到輸入框的數(shù)據(jù) 然后進行空判 非空后 我們把請求參數(shù)拼接在我們的 url 后面去調(diào)用工具類方法請求服務(wù)器去驗證登錄 。
異步調(diào)用請求方法
await httpRequestGet(networkurl).then((data)=>{
console.log("data --- > "+data);
Logger.error("登錄請求回調(diào)結(jié)果 ---> " +data.toString());
let obj=JSON.parse(data.toString());
Logger.error("請求結(jié)果code -- > "+obj.code);
if(obj.code===200){
prompt.showToast({
message: $r('app.string.login_success')
})
}
});
josn解析
let obj=JSON.parse(data.toString());
Logger.error("請求結(jié)果code -- > "+obj.code);
if(obj.code===200){
prompt.showToast({
message: $r('app.string.login_success')
})
}
請求成功后toast提示

image.png
最后總結(jié) :
這個簡單案例包含了網(wǎng)絡(luò)請求 布局還有 數(shù)據(jù)回調(diào) 字符串拼接 知識點還是很多,回調(diào)寫法和flutter 很像 這邊字符串拼接 直接+ 號拼接我寫很low希望網(wǎng)友可以優(yōu)化 還有json解析 后面我會專門講解的 現(xiàn)在篇幅有限就不展開講了 有興趣的同學(xué)可以把代碼下載出來再研究 最后呢 希望我都文章能幫助到各位同學(xué)工作和學(xué)習(xí) 如果你覺得文章還不錯麻煩給我三連 關(guān)注點贊和轉(zhuǎn)發(fā) 謝謝