email_validator | An email validator for Rails | Email library

You can use .addListener to the TextEditingController on initState.

A bool to change ui, you can use it to set borders color.

Well, finally I figured out this problem, I'm not sure if I'm in a very particular situation, but anyway here is the solution: each time I build the application, even though the plugins will be installed properly, but the path of the plugins are not imported properly in GeneratedPluginRegistrant.m. So after importing them manually, it works!

ps: the path of the plugins: /your_project_folder/ios/Pods/Target Support Files

an example on how to add plugins manually in GeneratedPluginRegistrant.m:

After carefully reading log file, here's what I recommend to do for clean deploy.

While venv is activated and you're in project directory (where manage.py live), do the following:

• Open requirements.txt
• Delete unneeded modules from requirements.txt
• Uninstall unneeded modules with pip uninstall module
• Now run pip freeze requirements.txt
• Deactivate venv
• Then add requirements.txt to source control git add -A
• Commit your changes git commit -m "deleted unneeded modules"
• If you have existed Heroku app, connect to it with heroku git:remote -a myapp, else pass this step
• Deploy, git push heroku master

If you are unsure which modules your project need and I can't determin exactly the project's requirements but if you have basic project, you only need 3 modules which are Django, psycopg2-binary, gunicorn, so do the following for clean deploy:

• Delete venv
• Outside project directory, create new one
• Activate venv
• Install the modules you need, probably Django, psycopg2-binary, gunicorn
• Now run pip freeze requirements.txt
• Deactivate venv
• Then add requirements.txt to source control git add -A
• Commit your changes git commit -m "deleted unneeded modules"
• If you have existed Heroku app, connect to it with heroku git:remote -a myapp, else pass this step
• Deploy, git push heroku master

You need to create a constructor for LoginPage to save the callback on this class, then when you need to use the callback in LoginPageState you use the widget.callbackName() or widget.callbackName.call().

The problem was with the JAVA DEVELOPMENT KIT version. I changed it to version 11.0.11 and it worked just fine. To do that, download the right JDK and change the JAVA_HOME environment variable.

IMPORTANT: a Java version too new might not work as well. Version 11 should be fine (and 8 as others over the internet stated).

The resizeToAvoidBottomPadding parameter of Scaffold was deprecated in v1.1.9

The resizeToAvoidBottomInset parameter should be used instead

Please refer this

You are setting the _passwordVisible variable to false with every rebuild because you call var _passwordVisible = false; in your build method. You can see that in the example you provided the _obscureText variable is set to false outside of the build method. Also, all of the TextEditingController objects should be initialized outside of the build method.

Something like this:

The answer to this will depend on your widget tree but ideally, you would be able to access the TextEditingControllers inside your TextFormFields.

You will need to create TextEditingControllers for each TextFormField:

Set them all toany, then run flutter pub get.

Now you can look in the pubspec.lock file and see what versions you got and put them in pubspec.yaml.