180-ReactNative的Geolocation

我们来看下react-native的geolocation

来看一下这个包

GitHub - Agontuk/react-native-geolocation-service: React native geolocation service for iOS and android

看下文档吧

看下示例代码

...
import Geolocation from 'react-native-geolocation-service';
...

componentDidMount() {
  if (hasLocationPermission) {
    Geolocation.getCurrentPosition(
        (position) => {
          console.log(position);
        },
        (error) => {
          // See error code charts below.
          console.log(error.code, error.message);
        },
        { enableHighAccuracy: true, timeout: 15000, maximumAge: 10000 }
    );
  }
}

我们看下android的强信号和弱信号分别怎么处理

强信号

  const highGeolocation = () => {
    Geolocation.getCurrentPosition(
      async (position) => {
        await updateCoords(position);
      },
      (error) => {
        console.log('high geolocation current position: ', error.code, error.message);
        lowGeolocation();
      },
      {enableHighAccuracy: true, timeout: 2500, maximumAge: 10000}
    );
  }

弱信号

  const lowGeolocation = () => {
    Geolocation.getCurrentPosition(
      async (position) => {
        await updateCoords(position);
      },
      (error) => {
        console.log('low geolocation current position: ', error.code, error.message);
        setLocationEnable(false);
      },
      {enableHighAccuracy: false, timeout: 2500, maximumAge: 10000, forceLocationManager: true}
    );
  }

然后我们来看下watchPosition

    watchPositionId = Geolocation.watchPosition(
      async (position) => {
        await updateCoords(position);
      },
      error => {
        console.log(error);
      },
      {
        accuracy: {
          android: 'high',
          ios: 'best',
        },
        distanceFilter: -1,
        interval: 2000
      }
    );

这里的distanceFilter可以设置成0

也可以设置成-1

根据不同的场景和需求

要合理判断

再看下文档里的说明

Location timeout still happening ?
Try the following steps: (Taken from here)
Turn phone off/on
Turn GPS off/on
Disable any battery saver settings, including Power Saving Mode, Battery Management or any third party apps
Perform an "AGPS reset": Install the App GPS Status & Toolbox, then in that app, go to Menu > Tools > Manage A-GPS State > Reset
Adjusting battery saver settings on different devices:
HTC: Access your phone settings > battery > power saving mode > battery optimization > select your app > don't optimize > save
Huawei: Turn Energy Settings to Normal and add your app to "Protected Apps"
LG If you're running Android 6 or higher: Settings > battery & power saving > battery usage > ignore optimizations > turn ON for your app
Motorola If you're running Android 6 or higher: Battery > select the menu in the upper right-hand corner > battery optimization > not optimized > all apps > select your app > don't optimize
OnePlus (using OxygenOS Settings): Battery > battery optimization > switch to 'all apps' > select your app > don't optimize
Samsung: Access battery settings > app power saving > details > your app > disabled
Sony If you're running Android 6 or higher: Battery > from the menu in the upper right-hand corner > battery optimization > apps > your app
Xiaomi (MIUI OS) If you're running Android 6 or higher: Access your phone settings > additional settings > battery and performance > manage battery usage > apps > your app