React-Native/Expo Location status if it user don't want to allow location after giving permission to app

Question

After allowing permission to access GPS in react native App. If the user rejected to turn on the gps. It will show errors like

Unhandled promise rejection: Error: Location request failed due to unsatisfied device settings."

I want to avoid if the user rejects the Gps turn on option It will return something. so I need If condition for the location whether it is On or Off. (I'm using expo-location)

Answer 1

You're seeing this error because the Location.getCurrentPositionAsync is async method and it returns a promise and if it fails it throws an error (the error you're seeing).

You could wrap your code inside a try and catch block to catch the error and do something about it. Example:

_getLocationAsync = async () => {
    let { status } = await Permissions.askAsync(Permissions.LOCATION);
    if (status !== 'granted') {
      alert('The request was denied');
    }else{
      try{
        let location = await Location.getCurrentPositionAsync({});
        // do something with location
      }catch(e){
        alert('We could not find your position. Please make sure your location service provider is on');
        console.log('Error while trying to get location: ', e);
      }
    }
  }

// call this._getLocationAsync();

Answer 2

you will need to check the status from expo-location and redirect user to settings to allow the permission for that you can use android intents for android and for ios you can use Linking to redirect the user to device settings and give permissions

  requestLocationPermission = async () => {
    const { status } = await Permissions.askAsync(Permissions.LOCATION);    
    if (status === 'granted) {
      navigation.navigate('screen_name');
    } else {
      // Alert Message if user does not allow permissions
      Alert.alert("alert Message", "Instructions based on OS", [
        {
          text: 'Open Settings',
          onPress: () => goToSettings(),
          style: 'cancel',
        },
        { text: Languages.DENY, onPress: () => navigation.goback()},
      ]);
    }
  };

go to settings

  goToSettings = () => {
    if (Platform.OS == 'ios') {
      // Linking for iOS
      Linking.openURL('app-settings:');
    } else {
      // IntentLauncher for Android
      IntentLauncher.startActivityAsync(
        IntentLauncher.ACTION_MANAGE_ALL_APPLICATIONS_SETTINGS
      );
    }
  };

• NOTE Intent launcher is a separate package for android