鸿蒙开发日记：Health Service Kit 在美颜相机中的健康关怀集成

//核心实现与代码示例
//用眼健康守护
//疲劳度监测：
typescript
 
import health from '@ohos.health';
 
// 初始化视力保护服务
const eyeCare = health.createEyeCareService({
  reminderInterval: 20,  // 每20分钟提醒
  sensitivity: 'medium'  // 中等敏感度
});
 
// 监听相机使用时长
camera.on('usageUpdate', (usage) => {
  eyeCare.recordScreenTime(usage.duration);
});
 
// 疲劳提醒回调
eyeCare.on('fatigueAlert', (level) => {
  this.showBreakNotification(
    `已连续拍摄${level.minutes}分钟，建议休息片刻`,
    'eye_care_icon'
  );
});
//暗光环境检测：
typescript
 
sensor.on('lightChange', (lux) => {
  if (lux < 50 && camera.isActive()) {
    health.recordHealthData({
      type: 'low_light_exposure',
      value: lux,
      duration: this.getLowLightDuration()
    });
    this.suggestBrightenEnvironment();
  }
});
//智能体态检测
//姿势分析集成：
typescript
 
// 创建姿势检测器
const postureDetector = health.createPostureDetector({
  detectionTypes: [
    'neck_angle',
    'shoulder_balance',
    'eye_distance'
  ]
});
 
// 实时监测拍摄姿势
camera.on('frameProcessed', (frame) => {
  const posture = postureDetector.analyze(frame);
  if (posture.neckAngle > 30) {
    this.showPostureGuide('请保持头部直立');
  }
});
 
// 生成健康报告
function generatePostureReport() {
  return health.queryHealthData({
    type: 'posture',
    from: Date.now() - 86400000, // 24小时内
    aggregation: 'average'
  });
}
//心情日记可视化
//表情情绪关联：
typescript
 
// 表情识别回调
vision.on('faceAnalyzed', (faces) => {
  if (faces[0]?.expression === 'smile') {
    health.recordHealthData({
      type: 'mood_log',
      value: 0.8,  // 开心指数(0-1)
      metadata: {
        photoUri: this.lastPhoto.uri,
        tags: ['开心','自拍']
      }
    });
  }
});
 
// 生成心情日历
async function renderMoodCalendar() {
  const moods = await health.queryHealthData({
    type: 'mood_log',
    timespan: '30d'
  });
  
  return moods.map(day => ({
    date: day.startTime,
    moodValue: day.averageValue,
    samplePhoto: day.samples[0]?.metadata?.photoUri
  }));
}
 
//关键优化策略
//隐私保护设计
typescript
 
// 匿名化健康数据
function anonymizeHealthData(data) {
  return {
    ...data,
    userIdentifiers: undefined,
    deviceId: hash(data.deviceId) // 哈希处理设备ID
  };
}
//多设备数据融合
typescript
 
// 同步穿戴设备数据
const watchData = await health.getDeviceData('watch', {
  metrics: ['heart_rate', 'stress_level'],
  timeRange: [Date.now() - 3600000, Date.now()] // 最近1小时
});
 
if (watchData.stressLevel > 70) {
  this.suggestRelaxationFilter();
}
//个性化阈值
typescript
 
// 基于用户画像调整提醒
const userProfile = await health.getUserHealthProfile();
eyeCare.setSensitivity(
  userProfile.eyeSensitivity || 'medium'
);
//权限动态申请
typescript
 
import abilityAccessCtrl from '@ohos.abilityAccessCtrl';
 
async function checkHealthPermission() {
  const atManager = abilityAccessCtrl.createAtManager();
  try {
    await atManager.requestPermissionsFromUser(
      ['ohos.permission.READ_HEALTH_DATA']
    );
    return true;
  } catch {
    return false;
  }
}
//数据有效性验证
typescript
 
// 过滤异常数据
function validateHealthData(data) {
  return data.filter(item =>
    item.value !== null &&
    item.timestamp > Date.now() - 31536000000 // 1年内
  );
}
//低功耗模式适配
typescript
 
power.on('lowPowerMode', (enabled) => {
  postureDetector.setFrequency(
    enabled ? 'low' : 'normal'
  );
});