HarmonyOS5 AI+元服务测试：智能卡片根据用户情绪自动更换配色的A/B测试

黑马波哥
114 阅读3分钟

以下为 ​​HarmonyOS 5 智能情绪响应卡片A/B测试方案​​，包含情绪识别、动态配色和效果验证的完整代码实现：

1. 系统架构

image.png

2. 情绪识别模块

2.1 多模态情绪分析

// emotion-detector.ets
class MultiModalEmotionDetector {
  static async detect(userInput: UserInput): Promise<EmotionScore> {
    const [facialScore, voiceScore] = await Promise.all([
      FaceAnalyzer.detectEmotion(userInput.image),
      VoiceAnalyzer.detectEmotion(userInput.audio)
    ]);
    
    return {
      happiness: (facialScore.happiness + voiceScore.happiness) / 2,
      calmness: facialScore.calmness * 0.7 + voiceScore.calmness * 0.3,
      sadness: Math.max(facialScore.sadness, voiceScore.sadness)
    };
  }
}

2.2 实时情绪追踪

// emotion-tracker.ets
class EmotionTracker {
  private static history: EmotionScore[] = [];
  
  static async getDominantEmotion(): Promise<EmotionType> {
    const current = await EmotionDetector.detect();
    this.history.push(current);
    
    const avg = this.history.reduce((sum, item) => ({
      happiness: sum.happiness + item.happiness,
      calmness: sum.calmness + item.calmness,
      sadness: sum.sadness + item.sadness
    }));
    
    const dominant = Object.entries(avg).reduce((a, b) => 
      a[1] > b[1] ? a : b
    );
    
    return dominant[0] as EmotionType;
  }
}

3. 动态配色引擎

3.1 情绪色彩映射

// color-mapper.ets
class EmotionColorMapper {
  private static readonly COLOR_SCHEMES = {
    happiness: {
      primary: '#FF9500',
      secondary: '#FFCC00',
      background: '#FFF5E6'
    },
    calmness: {
      primary: '#5AC8FA',
      secondary: '#34C759',
      background: '#F2F9FF'
    },
    sadness: {
      primary: '#AF52DE',
      secondary: '#5856D6',
      background: '#F5F0FF'
    }
  };
  
  static getScheme(emotion: EmotionType): ColorScheme {
    return this.COLOR_SCHEMES[emotion];
  }
}

3.2 平滑过渡动画

// color-transition.ets
@Component
struct AnimatedCard {
  @State currentScheme: ColorScheme;
  @State nextScheme: ColorScheme;
  
  build() {
    Stack() {
      // 背景色过渡
      Rect()
        .fill(this.currentScheme.background)
        .animation({ duration: 500, curve: 'easeOut' })
      
      // 主内容区
      Column() {
        Text('今日推荐')
          .fontColor(this.nextScheme.primary)
          .animation({ delay: 200 })
        
        Button('立即查看')
          .backgroundColor(this.nextScheme.secondary)
      }
    }
    .onEmotionChange((newEmotion) => {
      this.nextScheme = EmotionColorMapper.getScheme(newEmotion);
    })
  }
}

4. A/B测试框架

4.1 用户分组策略

// ab-test-splitter.ets
class ABTestGroupManager {
  static getUserGroup(userId: string): TestGroup {
    const hash = crypto.createHash('sha256').update(userId).digest('hex');
    const groupNum = parseInt(hash.substring(0, 8), 16) % 100;
    
    return groupNum < 50 ? 'A' : 'B'; // 50/50分组
  }
}

4.2 实验配置管理

// experiment-config.ets
class EmotionColorExperiment {
  static readonly CONFIGS = {
    A: { // 对照组：固定配色
      colorScheme: EmotionColorMapper.getScheme('calmness'),
      animation: false
    },
    B: { // 实验组：动态情绪配色
      colorScheme: null, // 动态生成
      animation: true
    }
  };
  
  static getConfig(userId: string): ExperimentConfig {
    const group = ABTestGroupManager.getUserGroup(userId);
    return this.CONFIGS[group];
  }
}

5. 数据收集与分析

5.1 交互事件埋点

// event-tracker.ets
class InteractionTracker {
  static trackCardInteraction(card: CardElement): void {
    card.onClick(() => {
      Analytics.logEvent('card_click', {
        emotion: EmotionTracker.currentEmotion,
        colorScheme: card.colorScheme,
        timestamp: Date.now()
      });
    });
    
    card.onView(() => {
      PerformanceMonitor.recordImpression({
        cardType: 'emotion_adaptive',
        renderTime: performance.now() - card.loadStartTime
      });
    });
  }
}

5.2 效果对比分析

// ab-test-analyzer.ets
class ExperimentAnalyzer {
  static async calculateResults(): Promise<ABTestResult> {
    const [groupAData, groupBData] = await Promise.all([
      Analytics.queryEvents('group=A'),
      Analytics.queryEvents('group=B')
    ]);
    
    return {
      ctrA: this.calculateCTR(groupAData),
      ctrB: this.calculateCTR(groupBData),
      engagementA: this.calculateEngagement(groupAData),
      engagementB: this.calculateEngagement(groupBData),
      significance: this.checkSignificance(groupAData, groupBData)
    };
  }
}

6. 完整组件实现

6.1 智能卡片组件

// emotion-card.ets
@Component
struct EmotionAdaptiveCard {
  @State emotion: EmotionType = 'calmness';
  @State colorScheme: ColorScheme;
  @Prop experimentGroup: string;
  
  aboutToAppear() {
    EmotionTracker.onChange((newEmotion) => {
      this.emotion = newEmotion;
      this.updateColorScheme();
    });
  }
  
  build() {
    Column() {
      // 卡片内容
      WeatherInfo()
        .background(this.colorScheme.background)
      
      ActionButton('查看详情')
        .backgroundColor(this.colorScheme.primary)
    }
    .onClick(() => {
      InteractionTracker.trackClick(this.experimentGroup);
    })
  }
  
  private updateColorScheme() {
    if (this.experimentGroup === 'B') {
      this.colorScheme = EmotionColorMapper.getScheme(this.emotion);
    }
  }
}

6.2 A/B测试包装器

// ab-test-wrapper.ets
@Component
struct ABTestContainer {
  @State group: string;
  
  aboutToAppear() {
    this.group = ABTestGroupManager.getUserGroup(User.id);
  }
  
  build() {
    Column() {
      if (this.group === 'A') {
        EmotionAdaptiveCard({ experimentGroup: 'A' })
      } else {
        EmotionAdaptiveCard({ experimentGroup: 'B' })
      }
    }
  }
}

7. 关键性能指标

指标测量方法优化目标
情绪识别准确率与人工标注对比≥85%
配色切换延迟从检测到渲染完成≤300ms
A组CTR点击/展示量基准值
B组CTR提升(BCTR - ACTR)/ACTR≥15%

8. 扩展测试场景

8.1 多情绪混合测试

// complex-emotion-test.ets
describe('复合情绪场景', () => {
  const testCases = [
    { input: { happiness: 0.8, sadness: 0.2 }, expected: 'happiness' },
    { input: { calmness: 0.6, happiness: 0.5 }, expected: 'calmness' }
  ];
  
  testCases.forEach(({ input, expected }) => {
    it(`应识别为${expected}`, async () => {
      const result = await EmotionDetector.getDominantEmotion(input);
      expect(result).toBe(expected);
    });
  });
});

8.2 极端光照测试

// lighting-condition.ets
describe('极端光照条件', () => {
  const conditions = ['backlight', 'lowlight', 'glare'];
  
  conditions.forEach(light => {
    it(`在${light}下应保持识别率`, async () => {
      const image = await TestImage.load(`face_${light}.jpg`);
      const score = await FaceAnalyzer.detectEmotion(image);
      expect(score.confidence).toBeGreaterThan(0.7);
    });
  });
});

9. 部署与监控

9.1 动态配置更新

// remote-config.ets
class RemoteExperimentConfig {
  static async updateConfig(): Promise<void> {
    const newConfig = await ConfigServer.fetch('emotion_color_ab');
    EmotionColorExperiment.updateConfig(newConfig);
    
    // 热更新当前用户分组
    ABTestGroupManager.resetCache();
  }
}

9.2 实时数据看板

// live-dashboard.ets
@Component
struct ExperimentDashboard {
  @State data: ABTestResult;
  
  build() {
    Grid() {
      GridItem() {
        Gauge({
          value: this.data.ctrB / this.data.ctrA,
          title: 'CTR提升率'
        })
      }
      GridItem() {
        LineChart({
          data: this.data.engagementTrend,
          title: '用户参与度趋势'
        })
      }
    }
    .onAppear(() => {
      setInterval(async () => {
        this.data = await ExperimentAnalyzer.getLiveData();
      }, 5000);
    })
  }
}

10. 完整示例

10.1 启动A/B测试

// main-launch.ets
function startEmotionExperiment() {
  // 1. 初始化情绪检测
  EmotionDetector.init({
    camera: 'front',
    audio: true,
    interval: 5000
  });
  
  // 2. 注册A/B测试
  ABTestManager.registerExperiment({
    id: 'emotion_color_v1',
    groups: ['A', 'B'],
    metrics: ['ctr', 'dwell_time']
  });
  
  // 3. 渲染测试组件
  EntryPoint.render(<ABTestContainer />);
}

10.2 CI/CD集成

# .github/workflows/ab-test.yml
jobs:
  deploy-experiment:
    runs-on: harmonyos-cloud
    steps:
      - uses: harmonyos/ab-test-action@v1
        with:
          experiment-id: emotion-color-v2
          groups: A,B,C
          traffic-ratio: 40-40-20
      - name: Monitor results
        run: ohpm run monitor --experiment=emotion-color

通过本方案可实现：

  1. ​​毫秒级​​ 情绪响应
  2. ​​科学分流​​ A/B测试
  3. ​​实时数据​​ 驱动决策
  4. ​​15%+​​ 交互提升
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