1 HarmonyOS 5分布式通信基础
HarmonyOS 5为聊天通讯应用开发带来了革命性的分布式能力,让开发者能够构建真正跨设备、无缝协同的通信体验。本节将介绍如何利用HarmonyOS 5的分布式架构和API 12+特性来打造高性能聊天应用。
1.1 系统特性与优势
HarmonyOS 5的分布式架构为聊天应用提供了三大核心优势:跨设备无缝接续使得用户可以在手机、平板、智慧屏等设备间无缝切换聊天会话;分布式数据管理确保消息和状态在多个设备间自动同步;统一安全认证通过分布式安全框架提供端到端的通信保护。这些特性使得开发者能够构建出比传统移动应用更智能、更连贯的通信体验。
1.2 开发环境配置
要开始开发HarmonyOS 5聊天应用,首先需要配置正确的开发环境。确保使用DevEco Studio 4.0或更高版本,并安装HarmonyOS 5.0.0+ SDK。在项目的module.json5
文件中,需要声明以下关键权限:
{"module": {"requestPermissions": [{"name": "ohos.permission.DISTRIBUTED_DATASYNC","reason": "用于跨设备消息同步","usedScene": {"abilities": ["MainAbility"],"when": "always"}},{"name": "ohos.permission.INTERNET","reason": "用于网络消息传输","usedScene": {"abilities": ["MainAbility"],"when": "always"}},{"name": "ohos.permission.MICROPHONE","reason": "用于语音消息录制","usedScene": {"abilities": ["MainAbility"],"when": "inuse"}}],"abilities": [{"name": "MainAbility","srcEntry": "./ets/MainAbility/MainAbility.ets","permissions": ["ohos.permission.DISTRIBUTED_DATASYNC","ohos.permission.INTERNET"]}]}
}
这些权限确保了应用能够访问分布式数据同步、互联网连接和麦克风设备,这是聊天应用的基础能力。
1.3 分布式关键能力
HarmonyOS 5的分布式能力核心在于三个关键Kit:Distributed Data Management(分布式数据管理)提供跨设备数据同步能力,允许消息在多个设备间自动同步;Distributed Scheduler(分布式调度)实现任务跨设备迁移,用户可以从手机开始聊天,然后在平板上无缝继续;Distributed Hardware(分布式硬件)允许应用访问和使用其他设备的硬件能力,如使用平板的麦克风发送语音消息而手机处理网络传输。
这些分布式能力通过简单的API暴露给开发者,使得即使复杂的跨设备场景也能轻松实现。例如,分布式数据库同步只需几行代码即可配置:
import distributedKVStore from '@ohos.data.distributedKVStore';
import { BusinessError } from '@ohos.base';// 创建分布式KVStore管理器
const kvManager = distributedKVStore.createKVManager({bundleName: 'com.example.chatapp',context: getContext(this)
});// 获取KVStore实例
const options: distributedKVStore.Options = {createIfMissing: true,encrypt: false,backup: false,autoSync: true,kvStoreType: distributedKVStore.KVStoreType.SINGLE_VERSION,securityLevel: distributedKVStore.SecurityLevel.S2
};kvManager.getKVStore('chat_store', options, (err, store) => {if (err) {console.error(`Failed to get KVStore: ${JSON.stringify(err)}`);return;}console.info('Succeeded in getting KVStore');this.kvStore = store;
});
这种分布式数据同步机制是构建多设备聊天应用的基础。
2 核心功能实现
2.1 聊天界面构建
使用ArkUI的声明式开发范式构建聊天界面,既能保证性能又能获得简洁的代码结构。以下是聊天主界面的实现示例:
@Component
struct ChatMainPage {@State messageList: Message[] = [];@State inputText: string = '';@State isConnected: boolean = false;private kvStore: distributedKVStore.SingleKVStore | null = null;build() {Column() {// 顶部状态栏Text(this.isConnected ? '已连接' : '连接中...').fontSize(16).fontColor(this.isConnected ? '#007DFF' : '#999999').margin({ top: 12, bottom: 12 });// 消息列表List({ space: 10 }) {ForEach(this.messageList, (item: Message) => {ListItem() {ChatMessageItem({ message: item })}}, (item: Message) => item.id)}.layoutWeight(1).onScrollIndex((start: number, end: number) => {// 滚动到顶部加载更多消息if (start === 0 && this.messageList.length > 0) {this.loadMoreMessages();}});// 输入区域Row() {TextInput({ text: this.inputText, placeholder: '输入消息...' }).layoutWeight(1).onChange((value: string) => {this.inputText = value;}).onSubmit(() => {if (this.inputText.trim()) {this.sendTextMessage(this.inputText.trim());this.inputText = '';}});Button('发送').margin({ left: 8 }).onClick(() => {if (this.inputText.trim()) {this.sendTextMessage(this.inputText.trim());this.inputText = '';}}).disabled(!this.inputText.trim());}.padding(12).backgroundColor('#FFFFFF').border({ width: 1, color: '#EEEEEE' })}.backgroundColor('#F5F5F5')}
}
这个界面包含了消息列表、输入框和发送按钮,使用了ArkUI的声明式语法来实现响应式布局。
2.2 消息收发机制
消息收发是聊天应用的核心功能。以下是使用WebSocket实现实时消息收发的完整示例:
class ChatService {private websocket: WebSocket | null = null;private reconnectAttempts: number = 0;private maxReconnectAttempts: number = 5;private messageHandlers: ((message: Message) => void)[] = [];// 连接WebSocket服务器async connect(url: string): Promise<void> {return new Promise((resolve, reject) => {try {this.websocket = new WebSocket(url);this.websocket.onopen = () => {console.info('WebSocket连接已建立');this.reconnectAttempts = 0;resolve();};this.websocket.onmessage = (event: MessageEvent) => {try {const message: Message = JSON.parse(event.data);this.notifyMessageHandlers(message);} catch (error) {console.error('消息解析失败:', error);}};this.websocket.onclose = () => {console.info('WebSocket连接已关闭');this.attemptReconnect(url);};this.websocket.onerror = (error) => {console.error('WebSocket错误:', error);reject(error);};} catch (error) {reject(error);}});}// 发送消息sendMessage(message: Message): void {if (this.websocket && this.websocket.readyState === WebSocket.OPEN) {const messageStr = JSON.stringify(message);this.websocket.send(messageStr);// 同时保存到分布式KVStorethis.saveToDistributedStore(message);} else {console.error('WebSocket未连接');// fallback: 直接保存到本地并尝试同步this.saveToDistributedStore(message);}}// 保存消息到分布式存储private async saveToDistributedStore(message: Message): Promise<void> {try {if (this.kvStore) {await this.kvStore.put(message.id, JSON.stringify(message));}} catch (error) {console.error('保存到分布式存储失败:', error);}}// 注册消息处理器addMessageHandler(handler: (message: Message) => void): void {this.messageHandlers.push(handler);}// 通知所有消息处理器private notifyMessageHandlers(message: Message): void {this.messageHandlers.forEach(handler => handler(message));}// 尝试重新连接private attemptReconnect(url: string): void {if (this.reconnectAttempts < this.maxReconnectAttempts) {this.reconnectAttempts++;setTimeout(() => {console.info(`尝试重新连接 (${this.reconnectAttempts}/${this.maxReconnectAttempts})`);this.connect(url);}, 3000 * this.reconnectAttempts); // 指数退避}}
}
这个实现提供了稳定的连接管理、自动重连机制和消息分发功能。
2.3 分布式同步实现
利用HarmonyOS的分布式数据管理实现多设备消息同步:
class DistributedSyncService {private kvStore: distributedKVStore.SingleKVStore | null = null;private deviceIdList: string[] = [];private changeListeners: ((changes: distributedKVStore.ChangeNotification) => void)[] = [];// 初始化分布式KVStoreasync initDistributedKVStore(context: Context): Promise<void> {try {const kvManager = distributedKVStore.createKVManager({context,bundleName: 'com.example.chatapp'});const options: distributedKVStore.Options = {createIfMissing: true,encrypt: true, // 启用加密backup: false,autoSync: true,kvStoreType: distributedKVStore.KVStoreType.SINGLE_VERSION,securityLevel: distributedKVStore.SecurityLevel.S2};this.kvStore = await kvManager.getKVStore('chat_sync_store', options);// 启用同步功能await this.kvStore.enableSync(true);// 设置数据变化监听this.setupChangeListener();// 获取可用设备列表await this.refreshDeviceList();} catch (error) {console.error('初始化分布式KVStore失败:', error);}}// 设置数据变化监听器private setupChangeListener(): void {if (!this.kvStore) return;this.kvStore.on('dataChange', distributedKVStore.SubscribeType.SUBSCRIBE_TYPE_REMOTE, (data: distributedKVStore.ChangeNotification) => {this.handleDataChange(data);});}// 处理数据变化private handleDataChange(change: distributedKVStore.ChangeNotification): void {// 处理新增消息change.insertEntries.forEach(entry => {try {const message = JSON.parse(entry.value) as Message;this.notifyChangeListeners(change);} catch (error) {console.error('解析同步消息失败:', error);}});// 处理更新消息(如已读状态更新)change.updateEntries.forEach(entry => {// 更新本地消息状态});// 处理删除消息change.deleteEntries.forEach(entry => {// 从本地移除消息});}// 同步消息到所有设备async syncMessageToAllDevices(message: Message): Promise<void> {if (!this.kvStore) return;try {// 存储到本地KVStoreawait this.kvStore.put(message.id, JSON.stringify(message));// 立即同步到所有设备await this.kvStore.sync(this.deviceIdList, distributedKVStore.SyncMode.PUSH_ONLY, 1000);} catch (error) {console.error('消息同步失败:', error);}}// 刷新设备列表async refreshDeviceList(): Promise<void> {try {const deviceManager = distributedDeviceManager.createDeviceManager('com.example.chatapp');const devices = await deviceManager.getAvailableDeviceList();this.deviceIdList = devices.map(device => device.deviceId);} catch (error) {console.error('获取设备列表失败:', error);}}
}
这种实现确保了消息在所有设备间的实时同步,提供了一致的用户体验。
2.4 本地数据存储
使用关系型数据库存储聊天记录和用户数据:
// 数据库模型定义
@Entry
@Entity
class ChatMessage {@PrimaryKeyid: string = '';@Columncontent: string = '';@ColumnsenderId: string = '';@ColumnsenderName: string = '';@Columntimestamp: number = 0;@ColumnmessageType: number = 0; // 0:文本, 1:图片, 2:语音@Columnstatus: number = 0; // 0:发送中, 1:已发送, 2:已送达, 3:已读@ColumnisDistributed: boolean = false;
}// 数据库操作类
class ChatDatabase {private rdbStore: relationalStore.RdbStore | null = null;// 初始化数据库async initDatabase(context: Context): Promise<void> {const config: relationalStore.StoreConfig = {name: 'chat.db',securityLevel: relationalStore.SecurityLevel.S1};try {this.rdbStore = await relationalStore.getRdbStore(context, config);await this.createTables();} catch (error) {console.error('数据库初始化失败:', error);}}// 创建表private async createTables(): Promise<void> {if (!this.rdbStore) return;const sql = `CREATE TABLE IF NOT EXISTS message (id TEXT PRIMARY KEY,content TEXT,senderId TEXT,senderName TEXT,timestamp INTEGER,messageType INTEGER,status INTEGER,isDistributed INTEGER)`;await this.rdbStore.executeSql(sql);}// 插入消息async insertMessage(message: ChatMessage): Promise<void> {if (!this.rdbStore) return;const valueBucket: relationalStore.ValuesBucket = {'id': message.id,'content': message.content,'senderId': message.senderId,'senderName': message.senderName,'timestamp': message.timestamp,'messageType': message.messageType,'status': message.status,'isDistributed': message.isDistributed ? 1 : 0};await this.rdbStore.insert('message', valueBucket);}// 查询聊天记录async getMessages(conversationId: string, limit: number = 20, offset: number = 0): Promise<ChatMessage[]> {if (!this.rdbStore) return [];const predicates = new relationalStore.RdbPredicates('message');predicates.equalTo('conversationId', conversationId).orderByDesc('timestamp').limit(limit).offset(offset);const result = await this.rdbStore.query(predicates, ['id', 'content', 'senderId', 'senderName', 'timestamp', 'messageType', 'status', 'isDistributed']);return result.map(item => {const message = new ChatMessage();message.id = item.id;message.content = item.content;message.senderId = item.senderId;message.senderName = item.senderName;message.timestamp = item.timestamp;message.messageType = item.messageType;message.status = item.status;message.isDistributed = !!item.isDistributed;return message;});}
}
这种数据存储方案既保证了本地数据的持久化,又支持高效查询和同步。
3 高级功能扩展
3.1 消息状态管理
实现完整的消息状态追踪机制,包括发送状态、送达状态和已读状态:
class MessageStatusService {private static instance: MessageStatusService;private statusCallbacks: Map<string, (status: number) => void> = new Map();// 更新消息状态async updateMessageStatus(messageId: string, status: number): Promise<void> {try {// 更新本地数据库await this.updateLocalMessageStatus(messageId, status);// 同步到其他设备await this.syncStatusToOtherDevices(messageId, status);// 通知状态变更this.notifyStatusChange(messageId, status);} catch (error) {console.error('更新消息状态失败:', error);}}// 注册状态回调registerStatusCallback(messageId: string, callback: (status: number) => void): void {this.statusCallbacks.set(messageId, callback);}// 通知状态变化private notifyStatusChange(messageId: string, status: number): void {const callback = this.statusCallbacks.get(messageId);if (callback) {callback(status);// 一次性回调,调用后移除this.statusCallbacks.delete(messageId);}}// 处理状态同步消息handleStatusSyncMessage(syncMessage: StatusSyncMessage): void {if (syncMessage.type === 'message_status_update') {this.updateMessageStatus(syncMessage.messageId, syncMessage.status);}}
}
3.2 文件传输功能
实现安全高效的文件传输功能,支持图片、视频和文档:
class FileTransferService {private static MAX_FILE_SIZE = 100 * 1024 * 1024; // 100MB// 发送文件async sendFile(fileUri: string, conversationId: string): Promise<string> {try {// 检查文件大小const fileStats = await fileio.stat(fileUri);if (fileStats.size > FileTransferService.MAX_FILE_SIZE) {throw new Error('文件大小超过限制');}// 生成唯一文件IDconst fileId = this.generateFileId();// 分块上传文件const uploadResult = await this.uploadFileInChunks(fileUri, fileId);// 保存文件信息到数据库await this.saveFileInfo({id: fileId,originalName: fileUri.substring(fileUri.lastIndexOf('/') + 1),size: fileStats.size,type: this.getFileType(fileUri),uploadTime: Date.now(),url: uploadResult.url,thumbnailUrl: await this.generateThumbnail(fileUri)});return fileId;} catch (error) {console.error('文件发送失败:', error);throw error;}}// 分块上传文件private async uploadFileInChunks(fileUri: string, fileId: string): Promise<UploadResult> {const CHUNK_SIZE = 512 * 1024; // 512KBconst file = await fileio.open(fileUri, fileio.OpenMode.READ_ONLY);try {let offset = 0;let chunkIndex = 0;while (offset < file.length) {const chunk = await fileio.read(file, new ArrayBuffer(CHUNK_SIZE), {offset,length: CHUNK_SIZE});// 上传分块await this.uploadChunk(fileId, chunkIndex, chunk);offset += CHUNK_SIZE;chunkIndex++;}// 确认上传完成return await this.completeUpload(fileId, chunkIndex);} finally {await fileio.close(file);}}// 生成缩略图private async generateThumbnail(fileUri: string): Promise<string> {// 根据文件类型生成缩略图const fileType = this.getFileType(fileUri);if (fileType === 'image') {return await image.createThumbnail(fileUri, { width: 200, height: 200 });} else if (fileType === 'video') {return await media.createVideoThumbnail(fileUri, { width: 200, height: 200 });}return ''; // 文档类型返回空字符串}
}
3.3 AI功能集成
集成AI能力增强聊天体验,支持智能回复和内容生成:
class AIChatService {private aiEngine: ai.AIEngine | null = null;// 初始化AI引擎async initAIEngine(): Promise<void> {try {this.aiEngine = await ai.createAIEngine({model: 'chat_assistant',hardware: ai.ComputeDevice.AUTO});} catch (error) {console.error('AI引擎初始化失败:', error);}}// 生成智能回复async generateSmartReply(conversationContext: Message[]): Promise<string[]> {if (!this.aiEngine) return [];try {const prompt = this.buildPromptFromContext(conversationContext);const result = await this.aiEngine.execute({inputs: [{ text: prompt }],parameters: {max_tokens: 50,temperature: 0.7,top_p: 0.9}});return result.outputs[0].text.split('\n').filter(line => line.trim()).slice(0, 3); // 返回最多3条建议} catch (error) {console.error('生成智能回复失败:', error);return [];}}// 构建AI提示private buildPromptFromContext(messages: Message[]): string {const recentMessages = messages.slice(-10); // 取最近10条消息let prompt = '根据以下对话上下文,生成3条简短的自然回复建议:\n\n';recentMessages.forEach(msg => {const role = msg.senderId === 'current_user' ? '用户' : '对方';prompt += `${role}: ${msg.content}\n`;});prompt += '\n回复建议:';return prompt;}// 内容检测async checkContentSafety(content: string): Promise<ContentSafetyResult> {try {const result = await this.aiEngine.execute({inputs: [{ text: content }],task_type: ai.TaskType.CONTENT_MODERATION});return {isSafe: result.outputs[0].scores.harmful < 0.1,scores: result.outputs[0].scores,flags: result.outputs[0].flags};} catch (error) {console.error('内容安全检测失败:', error);return { isSafe: true, scores: {}, flags: [] };}}
}
3.4 安全与加密
实现端到端加密和安全通信机制:
class SecurityService {private crypto: crypto.Crypto | null = null;private keyPair: crypto.KeyPair | null = null;// 初始化加密服务async initSecurity(): Promise<void> {try {this.crypto = crypto.createCrypto('RSA2048|AES256');// 生成或加载密钥对this.keyPair = await this.loadOrGenerateKeyPair();} catch (error) {console.error('安全服务初始化失败:', error);}}// 加密消息async encryptMessage(message: string, publicKey: string): Promise<EncryptedMessage> {if (!this.crypto) throw new Error('加密服务未初始化');try {// 生成随机会话密钥const sessionKey = await this.crypto.generateSessionKey('A256GCM');// 使用会话密钥加密消息const encryptedData = await this.crypto.encrypt({data: message,key: sessionKey,transformation: 'AES/GCM/NoPadding'});// 使用接收方公钥加密会话密钥const encryptedKey = await this.crypto.encrypt({data: sessionKey,key: publicKey,transformation: 'RSA/OAEPWithSHA-256AndMGF1Padding'});return {encryptedData: encryptedData.data,encryptedKey: encryptedKey.data,iv: encryptedData.iv,tag: encryptedData.tag};} catch (error) {console.error('消息加密失败:', error);throw error;}}// 解密消息async decryptMessage(encryptedMessage: EncryptedMessage): Promise<string> {if (!this.crypto || !this.keyPair) throw new Error('加密服务未初始化');try {// 使用私钥解密会话密钥const sessionKey = await this.crypto.decrypt({data: encryptedMessage.encryptedKey,key: this.keyPair.privateKey,transformation: 'RSA/OAEPWithSHA-256AndMGF1Padding'});// 使用会话密钥解密消息const decryptedData = await this.crypto.decrypt({data: encryptedMessage.encryptedData,key: sessionKey.data,iv: encryptedMessage.iv,tag: encryptedMessage.tag,transformation: 'AES/GCM/NoPadding'});return decryptedData.data.toString();} catch (error) {console.error('消息解密失败:', error);throw error;}}
}
4 性能优化与测试
4.1 性能监控
实现全面的性能监控和优化策略:
class PerformanceMonitor {private static metrics: Map<string, number[]> = new Map();private static startTimes: Map<string, number> = new Map();// 开始性能测量static startMeasure(metricName: string): void {this.startTimes.set(metricName, Date.now());}// 结束性能测量static endMeasure(metricName: string): void {const startTime = this.startTimes.get(metricName);if (startTime) {const duration = Date.now() - startTime;this.recordMetric(metricName, duration);this.startTimes.delete(metricName);}}// 记录性能指标private static recordMetric(metricName: string, value: number): void {if (!this.metrics.has(metricName)) {this.metrics.set(metricName, []);}this.metrics.get(metricName)!.push(value);// 定期上报性能数据if (this.metrics.get(metricName)!.length % 10 === 0) {this.reportMetrics(metricName);}}// 获取性能报告static getPerformanceReport(): PerformanceReport {const report: PerformanceReport = {};this.metrics.forEach((values, metricName) => {const avg = values.reduce((sum, val) => sum + val, 0) / values.length;const max = Math.max(...values);const min = Math.min(...values);const p95 = this.calculatePercentile(values, 0.95);report[metricName] = { avg, max, min, p95, sampleCount: values.length };});return report;}// 检查性能瓶颈static checkPerformanceBottlenecks(): PerformanceIssue[] {const issues: PerformanceIssue[] = [];const report = this.getPerformanceReport();// 定义性能阈值const thresholds: { [key: string]: number } = {'message_rendering': 100, // ms'database_query': 50, // ms'network_request': 1000, // ms'message_encryption': 100 // ms};Object.entries(report).forEach(([metric, stats]) => {if (thresholds[metric] && stats.avg > thresholds[metric]) {issues.push({metric,severity: stats.avg > thresholds[metric] * 2 ? 'high' : 'medium',currentValue: stats.avg,threshold: thresholds[metric],suggestion: this.getSuggestionForMetric(metric)});}});return issues;}
}
4.2 调试与测试
实现自动化测试和调试工具:
class ChatAppTester {private testCases: TestCase[] = [];private currentTest: number = 0;private results: TestResult[] = [];// 添加测试用例addTestCase(testCase: TestCase): void {this.testCases.push(testCase);}// 运行所有测试async runAllTests(): Promise<TestResult[]> {this.results = [];for (const testCase of this.testCases) {try {PerformanceMonitor.startMeasure(`test_${testCase.name}`);const result = await this.runTest(testCase);PerformanceMonitor.endMeasure(`test_${testCase.name}`);this.results.push(result);} catch (error) {this.results.push({name: testCase.name,status: 'failed',error: error.message,duration: 0});}}return this.results;}// 运行单个测试private async runTest(testCase: TestCase): Promise<TestResult> {const startTime = Date.now();try {// 设置测试环境await this.setupTestEnvironment(testCase);// 执行测试操作const result = await testCase.execute();// 验证结果const isValid = await this.validateResult(testCase, result);return {name: testCase.name,status: isValid ? 'passed' : 'failed',duration: Date.now() - startTime,details: result};} catch (error) {return {name: testCase.name,status: 'error',error: error.message,duration: Date.now() - startTime};}}// 生成测试报告generateTestReport(): TestReport {const totalTests = this.results.length;const passedTests = this.results.filter(r => r.status === 'passed').length;const failedTests = this.results.filter(r => r.status === 'failed').length;const errorTests = this.results.filter(r => r.status === 'error').length;return {summary: {total: totalTests,passed: passedTests,failed: failedTests,errors: errorTests,successRate: (passedTests / totalTests) * 100},details: this.results,performance: PerformanceMonitor.getPerformanceReport(),issues: PerformanceMonitor.checkPerformanceBottlenecks()};}
}
4.3 多设备适配
确保应用在不同设备上都有良好的体验:
class DeviceAdapter {private static deviceProfiles: Map<string, DeviceProfile> = new Map();// 初始化设备配置static initDeviceProfiles(): void {this.deviceProfiles.set('phone', {type: 'phone',maxMessageLength: 1000,supportedMedia: ['text', 'image', 'video', 'audio'],layout: 'single_column',features: ['touch', 'camera', 'microphone']});this.deviceProfiles.set('tablet', {type: 'tablet',maxMessageLength: 2000,supportedMedia: ['text', 'image', 'video', 'audio', 'document'],layout: 'dual_column',features: ['touch', 'camera', 'microphone', 'pen']});this.deviceProfiles.set('tv', {type: 'tv',maxMessageLength: 500,supportedMedia: ['text', 'image'],layout: 'tv_optimized',features: ['remote_control']});}// 获取设备适配配置static getDeviceConfig(deviceType: string): DeviceConfig {const profile = this.deviceProfiles.get(deviceType) || this.deviceProfiles.get('phone')!;return {uiConfig: this.getUIConfig(profile),featureConfig: this.getFeatureConfig(profile),performanceConfig: this.getPerformanceConfig(profile)};}// 响应式布局配置private static getUIConfig(profile: DeviceProfile): UIConfig {const baseConfig: UIConfig = {messageBubbleMaxWidth: '70%',fontSize: 16,spacing: 8,avatarSize: 40};switch (profile.type) {case 'phone':return { ...baseConfig, fontSize: 14, avatarSize: 36 };case 'tablet':return { ...baseConfig, fontSize: 16, avatarSize: 48 };case 'tv':return { ...baseConfig, fontSize: 24, avatarSize: 64,messageBubbleMaxWidth: '50%'};default:return baseConfig;}}
}
总结
核心要点总结:
- 分布式架构:利用HarmonyOS的分布式能力实现多设备无缝体验
- 安全通信:端到端加密和安全机制保障用户隐私
- 性能优化:全面的监控和优化策略确保流畅体验
- 扩展能力:AI集成和高级功能提升应用价值
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