获取当前位置超时求助：CRNA未eject及eject后均报错

Hey there, let's work through this location timeout issue you're facing. First off, I notice a critical mistake in where you added your location permissions—let's start with that.

1. You Added Permissions to the Wrong AndroidManifest.xml #

The file at node_modules/react-native-maps/lib/android/src/main/AndroidManifest.xml belongs to the react-native-maps dependency package. Any changes you make here will get overwritten the next time you run npm install or yarn install, and more importantly, this isn't the manifest that controls your app's permissions.

The correct file to modify is your project's own manifest:
android/app/src/main/AndroidManifest.xml

Add these permissions inside the root <manifest> tag (not nested inside <application>):

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<!-- Add this only if you need background location access (Android 10+) -->
<uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />

2. Request Runtime Permissions (Critical for Android 6.0+) #

Adding permissions to the manifest isn't enough—you need to explicitly ask the user for location access at runtime. Here's how to do this using React Native's PermissionsAndroid API before calling your location fetch method:

import { PermissionsAndroid } from 'react-native';

const requestLocationPermission = async () => {
  try {
    const granted = await PermissionsAndroid.request(
      PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
      {
        title: "Location Access Request",
        message: "This app needs access to your location to retrieve your current position.",
        buttonNeutral: "Ask Me Later",
        buttonNegative: "Cancel",
        buttonPositive: "OK"
      }
    );
    if (granted === PermissionsAndroid.RESULTS.GRANTED) {
      console.log("Location permission granted");
      // Call your location fetch function here
      fetchCurrentLocation();
    } else {
      console.log("Location permission denied");
    }
  } catch (err) {
    console.warn(err);
  }
};

const fetchCurrentLocation = () => {
  // Example react-native-maps location fetch call
  navigator.geolocation.getCurrentPosition(
    (position) => {
      console.log("Successfully retrieved location:", position);
      // Handle your location data here
    },
    (error) => console.error("Location error:", error),
    {
      enableHighAccuracy: true,
      timeout: 15000, // Increase timeout to give device more time to get a fix
      maximumAge: 10000
    }
  );
};

3. Tweak Location Fetch Configuration #

If the timeout still occurs, adjust these settings in your getCurrentLocation call:

• Increase the timeout value (e.g., from the default 5000ms to 15000ms) to give the device more time to acquire a location fix.
• If you don't need ultra-precise GPS, set enableHighAccuracy to false—this uses a combination of GPS and network location, which is faster.
• Double-check that the device's location services are turned on (either GPS or network location mode).

4. Clean and Rebuild Your Project #

After ejecting and updating the manifest, it's important to clear the Android build cache to avoid stale configurations:

cd android
./gradlew clean
cd ..
npx react-native run-android

Final Note #

Never modify files inside node_modules directly—these are external dependencies, and your changes won't persist across package installs. Always use your project's own configuration files and official React Native APIs to customize behavior.

内容的提问来源于stack exchange，提问作者pjconcepcion