鸿蒙多窗口笔记分屏工具开发指南 原创

鸿蒙多窗口笔记分屏工具开发指南

一、系统架构设计

基于HarmonyOS的WindowStage多窗口管理能力，我们设计了一套多窗口笔记分屏工具，主要功能包括：
多窗口管理：支持同时打开多个笔记窗口

分屏布局：灵活调整各窗口大小和位置

内容同步：多窗口间实时同步笔记内容

跨设备协作：多设备间同步笔记状态

快捷操作：提供分屏布局快捷方式

!https://example.com/harmony-multi-window-notes-arch.png

二、核心代码实现
窗口管理服务

// WindowManagerService.ets
import window from ‘@ohos.window’;

class WindowManagerService {
private static instance: WindowManagerService;
private windowStages: Map<string, window.WindowStage> = new Map();
private currentLayout: WindowLayout = WindowLayout.SINGLE;

private constructor() {}

public static getInstance(): WindowManagerService {
if (!WindowManagerService.instance) {
WindowManagerService.instance = new WindowManagerService();
return WindowManagerService.instance;

public async createNoteWindow(noteId: string): Promise<void> {

const windowStage = await window.createWindowStage(noteId);
this.windowStages.set(noteId, windowStage);

// 根据当前布局调整窗口
this.adjustWindowLayout();

public async closeNoteWindow(noteId: string): Promise<void> {

const windowStage = this.windowStages.get(noteId);
if (windowStage) {
  await windowStage.destroy();
  this.windowStages.delete(noteId);
  this.adjustWindowLayout();

}

public async setWindowLayout(layout: WindowLayout): Promise<void> {
this.currentLayout = layout;
await this.adjustWindowLayout();
private async adjustWindowLayout(): Promise<void> {

const windows = Array.from(this.windowStages.values());
const windowCount = windows.length;

if (windowCount === 0) return;

switch (this.currentLayout) {
  case WindowLayout.SINGLE:
    await this.setSingleLayout(windows[0]);
    break;
  case WindowLayout.SPLIT_VERTICAL:
    await this.setSplitVerticalLayout(windows);
    break;
  case WindowLayout.SPLIT_HORIZONTAL:
    await this.setSplitHorizontalLayout(windows);
    break;
  case WindowLayout.GRID:
    await this.setGridLayout(windows);
    break;

}

private async setSingleLayout(windowStage: window.WindowStage): Promise<void> {
await windowStage.resize({ width: ‘100%’, height: ‘100%’ });
await windowStage.move({ x: 0, y: 0 });
private async setSplitVerticalLayout(windows: window.WindowStage[]): Promise<void> {

const width = ${100 / windows.length}%;
for (let i = 0; i < windows.length; i++) {
  await windows[i].resize({ 
    width: width,
    height: '100%'
  });
  await windows[i].move({ 
    x: ${(100 / windows.length) * i}%, 
    y: 0 
  });

}

// 其他布局方法…
export const windowManager = WindowManagerService.getInstance();

笔记数据同步服务

// NoteSyncService.ets
import distributedData from ‘@ohos.data.distributedData’;

class NoteSyncService {
private kvManager: distributedData.KVManager;
private kvStore: distributedData.KVStore;

async init() {
const config = {
bundleName: ‘com.example.multiWindowNotes’,
userInfo: { userId: ‘currentUser’ }
};

this.kvManager = distributedData.createKVManager(config);
this.kvStore = await this.kvManager.getKVStore('notes_store', {
  createIfMissing: true
});

this.setupSync();

private setupSync(): void {

this.kvStore.on('dataChange', (data) => {
  this.handleDataChange(data);
});

public async syncNote(note: Note): Promise<void> {

await this.kvStore.put(note.id, JSON.stringify(note));

public async deleteNote(noteId: string): Promise<void> {

await this.kvStore.delete(noteId);

private handleDataChange(data: distributedData.ChangeInfo): void {

if (data.type === 'update') {
  const note = JSON.parse(data.value);
  EventBus.emit('noteUpdated', note);

else if (data.type === ‘delete’) {

  EventBus.emit('noteDeleted', data.key);

}

export const noteSyncService = new NoteSyncService();

主界面与窗口控制

// MultiWindowNotes.ets
@Component
struct MultiWindowNotes {
@State notes: Note[] = [];
@State currentLayout: WindowLayout = WindowLayout.SINGLE;
@State connectedDevices: DeviceInfo[] = [];

aboutToAppear() {
this.loadNotes();
noteSyncService.init();
this.setupListeners();
build() {

Column() {
  // 工具栏
  Toolbar({
    onAddNote: () => this.addNote(),
    onChangeLayout: (layout) => this.changeLayout(layout)
  })
  
  // 窗口布局控制
  WindowLayoutControls({
    currentLayout: this.currentLayout,
    onLayoutChange: (layout) => this.changeLayout(layout)
  })
  
  // 设备连接状态
  DeviceConnectionStatus({ devices: this.connectedDevices })

}

private async loadNotes(): Promise<void> {
// 加载本地笔记数据
private setupListeners(): void {

EventBus.on('noteUpdated', (note) => {
  this.updateNote(note);
});

EventBus.on('noteDeleted', (noteId) => {
  this.removeNote(noteId);
});

private async addNote(): Promise<void> {

const newNote = {
  id: generateId(),
  title: '新笔记',
  content: '',
  createdAt: Date.now()
};

this.notes.push(newNote);
await noteSyncService.syncNote(newNote);
await windowManager.createNoteWindow(newNote.id);

private async changeLayout(layout: WindowLayout): Promise<void> {

this.currentLayout = layout;
await windowManager.setWindowLayout(layout);

private updateNote(updatedNote: Note): void {

const index = this.notes.findIndex(n => n.id === updatedNote.id);
if (index >= 0) {
  this.notes[index] = updatedNote;

else {

  this.notes.push(updatedNote);

}

private removeNote(noteId: string): void {
this.notes = this.notes.filter(n => n.id !== noteId);
}

笔记窗口组件

// NoteWindow.ets
@Component
export struct NoteWindow {
@Param noteId: string;
@State note: Note | null = null;
@State isFocused: boolean = false;

aboutToAppear() {
this.loadNote();
this.setupListeners();
build() {

Column() {
  if (this.note) {
    // 笔记标题
    TextInput({ text: this.note.title })
      .onChange((title) => this.updateTitle(title))
      .fontSize(18)
      .fontWeight(FontWeight.Bold)
      .margin({ bottom: 10 })
    
    // 笔记内容
    TextInput({ text: this.note.content })
      .onChange((content) => this.updateContent(content))
      .height('80%')

}

.width('100%')
.height('100%')
.padding(15)
.backgroundColor(this.isFocused ? '#FFF' : '#F5F5F5')
.border({ width: 1, color: this.isFocused ? '#1890FF' : '#D9D9D9' })

private async loadNote(): Promise<void> {

// 加载笔记数据

private setupListeners(): void {

EventBus.on('noteUpdated', (updatedNote) => {
  if (updatedNote.id === this.noteId) {
    this.note = updatedNote;

});

// 监听窗口焦点变化
windowManager.onWindowFocusChange(this.noteId, (focused) => {
  this.isFocused = focused;
});

private async updateTitle(title: string): Promise<void> {

if (this.note) {
  this.note.title = title;
  await noteSyncService.syncNote(this.note);

}

private async updateContent(content: string): Promise<void> {
if (this.note) {
this.note.content = content;
await noteSyncService.syncNote(this.note);
}

三、关键功能说明
窗口布局模式

布局模式 描述 适用场景

单窗口 全屏显示一个笔记 专注编辑单个笔记
垂直分屏 多个窗口垂直排列 比较不同笔记内容
水平分屏 多个窗口水平排列 参考和编辑同时进行
网格布局 窗口以网格形式排列 同时查看多个笔记

数据同步策略

数据类型 同步频率 同步方式 冲突解决

笔记内容 实时同步 增量同步 最后修改优先
窗口布局 变化时同步 全量同步 主设备优先
笔记元数据 每分钟同步 批量同步 时间戳最新优先

性能优化措施

窗口渲染优化：虚拟化长列表内容

同步频率控制：内容防抖同步(500ms)

本地缓存：优先读取本地数据

差异同步：只同步变化部分

四、项目扩展与优化
高级布局管理

// AdvancedLayoutManager.ets
class AdvancedLayoutManager {
async saveLayoutPreset(name: string): Promise<void> {
const windows = windowManager.getWindows();
const layout = {
name,
windows: windows.map(w => ({
id: w.id,
size: w.size,
position: w.position
}))
};

await layoutDB.save(layout);

async applyLayoutPreset(name: string): Promise<void> {

const layout = await layoutDB.get(name);
for (const win of layout.windows) {
  await windowManager.resizeWindow(win.id, win.size);
  await windowManager.moveWindow(win.id, win.position);

}

协同编辑功能

// CollaborationService.ets
class CollaborationService {
async startCollaboration(noteId: string, users: User[]): Promise<void> {
await collaborationServer.startSession(noteId, users);
async lockContent(noteId: string, section: ContentSection): Promise<void> {

await collaborationServer.lock(noteId, section);

}

智能内容分析

// ContentAnalysisService.ets
class ContentAnalysisService {
analyzeNotes(notes: Note[]): AnalysisResult {
// 实现笔记内容分析算法
return {};
}

五、总结

本多窗口笔记分屏工具实现了以下核心价值：
高效多任务：同时编辑多个笔记内容

灵活布局：多种分屏模式自由切换

实时协作：多设备多用户协同编辑

智能管理：笔记内容智能分析整理

扩展方向：
增加语音笔记功能

开发智能排版引擎

实现手写笔记支持

构建知识图谱关联

注意事项：
需要申请ohos.permission.MANAGE_WINDOWS权限

多窗口模式下注意内存管理

生产环境需要添加冲突解决机制

建议提供布局保存和恢复功能