How to Hot Reload to Multiple Devices In Flutter?

Flutter has an amazing feature that loads only the required part of an application rather than loading an entire application from scratch. So in this article, We will get into How to Hot Reload to Multiple Devices In Flutter?

What is Hot Reload in Flutter?

Hot Reload feature that allows you to see the reflected change after bug fixes, building user interfaces, and even adding certain features to the app without running your application fresh over and over again.

How to Hot Reload to Multiple Devices In Flutter?

User can give a try to below things in Android Studio:

• Start both emulators
• Run your code with flutter run -d all
• Press r to hot reload

In Android Studio, if you are running more than one device there is an option Flutter hot reload (All Devices) under run menu.

If you’re using VS Code as your Flutter IDE, this is how you can use the VS launch configuration and tasks to run concurrently from a single launch and have hot reload enabled for all devices.

If you have an issue with executing flutter run -d all this is an alternative solution will which let you specify the devices that should run. Ensure that the devices you specify are available when running flutter devices.

Your current launch.json file may look something like this:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Flutter",
            "type": "dart",
            "request": "launch",
            "flutterMode": "debug"        
        }
    ]
}

Setup

You will need to update this launch.json file and create tasks.json in the same .vscode folder that is in your application’s root directory.

Paste only the below code into launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Flutter-All",
            "preLaunchTask": "Flutter-Launch-All",
            "type": "dart",
        },
        {
            "name": "Flutter-iOS",
            "preLaunchTask": "Flutter-Launch-iOS",
            "type": "dart",
        },
        {
            "name": "Flutter-Android",
            "preLaunchTask": "Flutter-Launch-Android",
            "type": "dart",
        },
        {
            "name": "Flutter-Web",
            "preLaunchTask": "Flutter-Launch-Web",
            "type": "dart",
        }
    ],
}

Paste only the below code into tasks.json

{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "Flutter-Launch-All",
      "dependsOn": [
        "Flutter-Launch-iOS",
        "Flutter-Launch-Android",
        "Flutter-Launch-Web"
      ]
    },
    {
      "label": "Flutter-Launch-iOS",
      "type": "shell",
      "command": "flutter run -d 'iPhone 11' "
    },
    {
      "label": "Flutter-Launch-Android",
      "type": "shell",
      "command": "flutter run -d 'AOSP on IA Emulator' "
    },
    {
      "label": "Flutter-Launch-Web",
      "type": "shell",
      "command": "flutter run -d 'Chrome' "
    }
  ]
}

Replace the device names accordingly.

Firing up all devices

Press the F5 key.

And you’re done.

If the F5 shortcut to Start Debugging does not work for you, navigate to Debug & Run on the side panel and select the Flutter-All Configuration you’ve just created and then Run.

Conclusion:

Thanks for Reading !!!

In this article, We have been through How to Hot Reload to Multiple Devices In Flutter?

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Written by Nirali Patel

Nirali Patel is a dedicated Flutter developer with over two years of experience, specializing in creating seamless mobile applications using Dart. With a passion for crafting user-centric solutions, Nirali combines technical proficiency with innovative thinking to push the boundaries of mobile app development.