How to integrate logs in a Flutter application

[bhardwaju]

In this article, we'll discuss how to integrate logs in a Flutter application. We'll use the Logger class to log messages in our Flutter application.

If you have any questions, please leave a comment below! 

To get started, we need to create a new Flutter project. This can be done by running the following command: 

flutter create my_app

This command will create a new Flutter project called my_app.

Next, we need to add the Logger class to our project. This class will allow us to log messages in our Flutter application.

To add the Logger class, we need to open the main.dart file in the root directory of our Flutter project. This file will contain the information about our project, such as its name, version, and dependencies.

The following is an example of a main.dart file: 

import 'package:flutter/material.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter/painting.dart';
import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Demo'),
        ),
        body: Center(
          child: Logger(),
        ),
      ),
    );
  }
}

This code will add the Logger class to our Flutter application. The Logger class will log all messages to the console.

Now, we can log messages in our Flutter application. We can do this by adding the following code to the main.dart file:

import 'package:flutter/material.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter/painting.dart';
import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Demo'),
        ),
        body: Center(
          child: Logger(),
        ),
      ),
    );
  }
}

class Logger extends StatefulWidget {
  @override
  State createState() => _LoggerState();
}

class _LoggerState extends State<Logger> {
  @override
  void initState() {
    super.initState();

    // Set up logging.
    FlutterLogger.setup(
      level: FlutterLoggerLevel.info,
    );
  }

  @override
  void dispose() {
    super.dispose();

    // Clear logging.
    FlutterLogger.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Text('This is a log message.');
  }
}

This code will log the message, This is a log message to the console.

That's it! We've successfully integrated logs in the Flutter application.

---

Authored by:

• Utkarsh Bhardwaj (@bhardwaju )Cloud Migration Consultant, Google
• Shivank Awasthi (@shivankawasthi) Strategic Cloud Engineer, Google

Video by:

• Amit Dutta (@amitdutta) Strategic Cloud Engineer, Google