📌 模块概述
应用设置功能允许用户配置应用的基本设置,比如语言、主题、字体大小等。用户的设置会被保存,下次打开应用时会应用这些设置。
🔗 完整流程
第一步:加载设置
启动应用时加载用户的设置。
第二步:修改设置
用户可以修改各种设置选项。
第三步:保存设置
设置被保存到数据库。
🔧 Web代码实现
javascript
async renderSettings() {
const settings = await noteDB.getSettings();
return `
<div class="page active">
<div class="page-header">
<h1 class="page-title">⚙️ 应用设置</h1>
</div>
<div class="settings-form">
<div class="form-group">
<label>语言</label>
<select id="language" class="form-control" value="${settings.language || 'zh'}">
<option value="zh">中文</option>
<option value="en">English</option>
</select>
</div>
<div class="form-group">
<label>主题</label>
<select id="theme" class="form-control" value="${settings.theme || 'light'}">
<option value="light">浅色</option>
<option value="dark">深色</option>
</select>
</div>
<div class="form-group">
<label>字体大小</label>
<input type="range" id="font-size" min="12" max="20" value="${settings.fontSize || 14}">
</div>
<button class="btn btn-primary" onclick="app.saveSettings()">保存设置</button>
</div>
</div>
`;
}
// 保存设置
async saveSettings() {
try {
const settings = {
language: document.getElementById('language').value,
theme: document.getElementById('theme').value,
fontSize: document.getElementById('font-size').value
};
await noteDB.updateSettings(settings);
Utils.showToast('设置已保存', 'success');
} catch (error) {
console.error('保存设置失败:', error);
Utils.showToast('操作失败,请重试', 'error');
}
}
🔌 OpenHarmony 原生代码
typescript
// SettingsPlugin.ets - 设置插件
import { webview } from '@kit.ArkWeb';
import { common } from '@kit.AbilityKit';
import { fileIo } from '@kit.CoreFileKit';
@NativeComponent
export class SettingsPlugin {
private context: common.UIAbilityContext;
constructor(context: common.UIAbilityContext) {
this.context = context;
}
// 初始化插件
public init(webviewController: webview.WebviewController): void {
webviewController.registerJavaScriptProxy(
new SettingsJSProxy(this),
'settingsPlugin',
['getSettings', 'updateSettings']
);
}
// 获取设置
public getSettings(): Promise<any> {
return new Promise((resolve) => {
try {
const settingsPath = this.context.cacheDir + '/settings.json';
const content = fileIo.readTextSync(settingsPath);
const settings = JSON.parse(content);
resolve(settings);
} catch (error) {
console.error('Failed to get settings:', error);
resolve({ language: 'zh', theme: 'light', fontSize: 14 });
}
});
}
// 更新设置
public updateSettings(settings: any): Promise<boolean> {
return new Promise((resolve) => {
try {
const settingsPath = this.context.cacheDir + '/settings.json';
fileIo.writeTextSync(settingsPath, JSON.stringify(settings, null, 2));
resolve(true);
} catch (error) {
console.error('Failed to update settings:', error);
resolve(false);
}
});
}
}
// SettingsJSProxy.ets - JavaScript代理类
class SettingsJSProxy {
private plugin: SettingsPlugin;
constructor(plugin: SettingsPlugin) {
this.plugin = plugin;
}
getSettings(): void {
this.plugin.getSettings().then(settings => {
console.log('Settings loaded:', settings);
});
}
updateSettings(settings: any): void {
this.plugin.updateSettings(settings).then(success => {
console.log('Settings updated:', success);
});
}
}
📝 总结
应用设置功能展示了如何在Cordova与OpenHarmony混合开发中实现用户偏好设置。
欢迎加入开源鸿蒙跨平台社区:https://openharmonycrossplatform.csdn.net
