Скачать или смотреть How to Fix Your Flutter App’s Connectivity Issues on Android Devices

Discover how to resolve the connectivity problems of your Flutter app on Android devices with essential tips and solutions.
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Troubleshooting Flutter App Not Reaching Server on Android

Developing a full-stack application using Flutter for the frontend and Node.js with Express for the backend can be an exciting journey. However, even the most experienced developers can encounter issues along the way. One common challenge is when a Flutter app works seamlessly on iOS but fails to reach the server on Android devices. If you've encountered this issue, you're in the right place! In this guide, we'll uncover the potential reasons and provide straightforward solutions to get your app up and running on Android.

The Issue: Connectivity Problems on Android

Imagine you've released a stellar app for iOS users, only to find that when your Flutter app is installed on physical Android devices, such as the Galaxy J7 and Galaxy S20, it can't retrieve necessary data. Testing on an Android emulator might show everything functioning correctly while the physical device presents a stark contrast with no data retrieval occurring.

Key Symptoms:

App on Android cannot reach the backend server.

No data retrieval occurs, even though the iOS version works flawlessly.

Console logs on the backend (Node.js) show no incoming requests from the Android app.

The Solution: Granting Internet Permissions

The first step in diagnosing this issue is ensuring that your app has the necessary Internet permissions defined in your AndroidManifest.xml file. This is a common oversight that can lead to connectivity issues on physical devices.

Step-by-Step Guide to Add Internet Permission

Locate Your AndroidManifest.xml File:

Navigation Path: android/app/src/main/AndroidManifest.xml

Add the Internet Permission:

You need to ensure that the following line is added within the <manifest> tag in your AndroidManifest.xml file:

[[See Video to Reveal this Text or Code Snippet]]

Rebuild Your Application:

After adding the permission, remember to rebuild your Flutter application. You can do this by running the following command in your terminal or command prompt:

[[See Video to Reveal this Text or Code Snippet]]

Additional Tips

Check Your Network: Ensure that your Android device is connected to the internet. Sometimes, network issues may prevent the app from connecting to the server.

Test with Different Devices: If possible, try to test the app on multiple Android devices to confirm whether the issue is device-specific or more widespread.

Conclusion

In conclusion, connectivity problems in your Flutter app on Android devices are often resolved by ensuring proper internet permissions are set up in your AndroidManifest.xml. By following the steps outlined in this guide, you can resolve the issue and allow your Flutter app to communicate effectively with your backend server. Keep testing, and soon you'll be back to providing a seamless experience for your users across all platforms!

If you have any more questions or need further assistance, feel free to reach out in the comments below. Happy coding!