我在使用 Expo 计步器计算步数时遇到问题

Question

我正在使用 expo 计步器，但有两个问题：

1. 它似乎不计算步数，步数计数始终为零。

2. Android 不支持 Pedometer.getStepCountAsync 函数。

我正在使用

• "expo": "~44.0.0"
• "expo-sensors": "~11.1.0"
• "react": "17.0.1"
• "react-dom": "17.0.1"
• "react-native" ：“0.64.3”
• 我的手机android版本是11

这是我的代码

import { Pedometer } from "expo-sensors";
export default function HomeScreen() {
  const [pedometerAvailability, setPedometerAvailability] = useState("");
  const [stepsCount, setStepsCount] = useState(0);

  useEffect(() => {
    subscribe();
    return () => {};
  }, []);

  const subscribe = () => {
    const subscription = Pedometer.watchStepCount((result) => {
      setStepsCount(result.steps);
    });

    Pedometer.isAvailableAsync().then(
      (result) => {
        setPedometerAvailability(String(result));
      },
      (error) => {
        setPedometerAvailability("Could not get isPedometerAvailable: " + error);
      }
    );
  };

  return (
   <Text>{stepsCount}</Text>
  )
}

Answer 1

只需授予跟踪步数的权限

    const requestActivityPermission = async () => {
  try {
    const granted = await PermissionsAndroid.request(
      PermissionsAndroid.PERMISSIONS.ACTIVITY_RECOGNITION,
    );
    if (granted === PermissionsAndroid.RESULTS.GRANTED) {
      Alert.alert("Start walking");
    } else {
      Alert.alert("permission denied");
    }
  } catch (err) {
    console.warn(err);
  }
};