I have an issue when I try to save any modifications on a new project, the hot reload doesn t work on save, because he has an issue that I can t find
I need to mention that I do not modified anything in the project, just started 2 hours ago and searched for the solution
I just tried to modify the title and nothing more first
In android Studio on the top left corner choose File -> Invalidate Caches...
Then you will see a modal
check both option and press the "Invalidate and Restart" button.
When the Android studio starts again, Re-run your application and check if the hot-reload works properly.
That worked for me.
There is a banner on top that says you haven't run pub get. You can press the button on that banner to run the command (Get dependencies).
This is likely because you changed your pubspec.yaml file.
Another thing you can try is to stop and restart, this is sometimes necessary. If this also doesn't work, try to clean using the command flutter clean and/or restart Android Studio
What is the difference between hot reload, hot restart, and full restart in Flutter and does web support them too?
Hot Reload:
Hot reload loads code changes into the VM and re-builds the widget tree, preserving the app state; it doesn’t rerun main() or initState().
For IntelliJ or Android Studio: cmd + \
For VSCode: ctrl + F5
Hot Restart:
Hot restart loads code changes into the VM, and restarts the Flutter app, losing the app state.
For IntelliJ or Android Studio: shift + cmd + \
For VSCode: shift + ctrl + F5
Full Restart:
Full restart restarts the iOS, Android, or web app. This takes longer because it also recompiles the Java / Kotlin / ObjC / Swift code. On the web, it also restarts the Dart Development Compiler. There is no specific keyboard shortcut for this; you need to stop and start the run configuration.
Flutter web currently supports hot restart but not hot reload.
I'm facing a weird issue. I inserted some logs just like below:
log('whatever messager you want');
Now, no matter if I comment them or change the message inside them, nothing changes. Thay remain there the way I set it the first time. It happens in both VSCode and Android Studio.
I already tried:
deleting and installing the app again.
reload vscode window
close and reopen vscode
restart windows
Nothing worked for me.
Have you tried to run
flutter clean
in your project directory?
In my case, Ctrl + Shift + B was displaying No build task to run found and ctrl + F5 wasn't updating my code changes when using VSCode.
The solution I found was to migrate to Android Studio. I relaunched the emulator from Android Studio and the Run button updates the app correctly.
Whilst running my app using flutter run in the console I can press 'r' to do a reload and press 'R' to do a reload and restart. Is there a way to do this whilst debugging in VS Code? Saving a file causes a hot reload but I can't figure out a way to do a full restart.
Edit
This is a little bit different to the hot reload option so I don't think this is a duplicate. This question regards performing a full restart of the application without reinstalling it. This is possible by pressing a capital R in the console, as opposed to pressing a lowercase r in the console which would perform a hot reload.
When debugging you can press Ctrl+F5 for a full restart, or you can run the Flutter: Full Restart command from the VS Code's command palette (Ctrl+Shift+P or Cmd+Shift+P for macOS).
Note: In the next version (v2.13.0, which there's a beta of available) "Full Restart" has been renamed to "Hot Restart" to better reflect how it works (this is happening across the other Flutter tools and docs too).
Related info:
Flutter VS Code docs
Dart Code keybindings
Dart Code debugging commands
The chosen answer wasn't working for me with Flutter 1.2.1 so I used this solution:
get the Flutter extension
search for dart.flutterDebuggerRestartBehaviour in VS Code settings and set it to hotRestart
start the debugger (F5) and click the restart button when you want to hot restart:
I've just started playing with Flutter in VSCode. I also installed the Dart Plugin.
Running the demo app I read in the terminal
Is this the only way to hot-reload the app? I mean I should always keep the terminal open and focus on it to type "r" in order to reload my views?
Isn't there a shortcut directly from VSCode?
There's an extension for that. Called Dart Code and another one named Flutter Code
They will detect that your project is a Dart/Flutter project. And allows you to debug it + hot reload using f5.
For 2022, this solution worked.
Steps
Open Settings.
Paste this text > dart.flutterHotReloadOnSave on the settings search box.
And change value from "Manual" to "Always"
If you like to hot reload your app with a keybinding better than Ctrl+Shift+F5, just change the Debug: Restart to Ctrl+S, so whenever you trigger the the Ctrl+S the app will first save your changes according to the workbench.action.files.save and afterwards restart the app (=hot reload, it is the green circle you see in the debugbar).
Keybindings for VS Code:
VSCode debug -> start debuging, make a change and try, That's what you want.
No idea why F5 does not hot reload for me :(
But, you can map the -
Flutter: Hot Reload
command to whatever key combo floats your boat via -
Preferences > Keyboard ShortCuts
as in this screenshot -
open the Debug sidebar from VSCode and use it
then when you save, it will hot reload and apply the changes you make
that is what working with me
use the green reload button to hot reload the app in VS Code
on Mac select
Run without Debugging or Shift+f5
you will see this at top select the electric icon for Hot Reload.
After doing some changes save it. It will auto reflect changes.
yes Here is the plugin Dart Code for VS CODE
https://marketplace.visualstudio.com/items?itemName=Dart-Code.dart-code
here is official doc for VsCode flutter
https://flutter.io/get-started/editor/#vscode
In VS once installed Dart + Flutter extension, 2 options to hot reload 1) Use combo keys Command + Shift + F5. 2) Save the file by use combo keys Command + S
I have both extensions and VSCode is set to Hot Reload once a document is saved. The only time I can reload my app is by stopping and restarting my debugger
i dont know why but my vscode hot reloading not work if you have this problem you can use ctrl + f5 to refresh app.
hope to work for developers that hot reloading not work for them.
You need to run Flutter app from VS Code's built-in debugger not VS Code's terminal.
Select ▷ then "Run without Debugging" -> You can now use ⌘S on Mac to ⚡ Hot Reload ⚡
===== Aug 2022 UPDATE =====
v3.42 and above: You can enable hot reload on autosave in the latest version by setting Flutter Hot Reload On Save to allIfDirty in your VSCode settings.
===== Old Versions (Early 2022 and below) =====
v3.41 and below: You can enable hot reload on autosave in the latest version by setting Flutter Hot Reload On Save to always in your VSCode settings.
v3.19 only: They disabled hot reload on autosave completely.
v3.18 and below: The extension hot reloads automatically when auto saving.
if flutter and dart extensions already installed on vscode
Set from manual to All
If you run your flutter project from the terminal you will have to manually press r to do a hot reload.
Therefore use the Run and Debug option in the VS Code to test your project.
You may encounter problems with Hot Reload due to VS Code issues like this, which is relevant while writing this answer.
The most convincing way I see to do it without downgrading, updating to Insiders builds and/or loosing dev speed is to use the green restart/reload button in the VS Code run widget or Ctrl+Shift+F5 shortcut, but this option may be inacceptable for projects with trickier navigation and few different views.