Tutorial: Building a Login Screen Using KivyMD in Python – Python Kivy GUI Tutorial #44

In this tutorial, we will be creating a login screen using KivyMD, which is an extension of the Kivy framework that provides Material Design components for creating beautiful and intuitive user interfaces. The login screen will have two input fields for the username and password, as well as buttons for logging in and creating a new account.

To get started, make sure you have Kivy and KivyMD installed. You can install them using pip:

pip install kivy
pip install kivymd

Now, create a new Python file and import the necessary modules:

from kivymd.app import MDApp
from kivymd.uix.screen import MDScreen
from kivymd.uix.textfield import MDTextField
from kivymd.uix.button import MDFlatButton
from kivymd.uix.label import MDLabel

Next, create a class for the login screen:

class LoginScreen(MDScreen):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)

        self.username = MDTextField(hint_text='Username', pos_hint={'center_x': 0.5, 'center_y': 0.6})
        self.add_widget(self.username)

        self.password = MDTextField(hint_text='Password', password=True, pos_hint={'center_x': 0.5, 'center_y': 0.5})
        self.add_widget(self.password)

        self.login_button = MDFlatButton(text='Login', pos_hint={'center_x': 0.5, 'center_y': 0.4}, on_release=self.login)
        self.add_widget(self.login_button)

        self.new_account_button = MDFlatButton(text='Create New Account', pos_hint={'center_x': 0.5, 'center_y': 0.3}, on_release=self.create_account)
        self.add_widget(self.new_account_button)

    def login(self, *args):
        username = self.username.text
        password = self.password.text

        # Add code to verify login credentials here

    def create_account(self, *args):
        # Add code to create a new account here

Now, create a class for the main app:

class LoginApp(MDApp):
    def build(self):
        self.theme_cls.primary_palette = 'Blue'
        return LoginScreen()

Finally, run the app:

if __name__ == '__main__':
    LoginApp().run()

This will create a basic login screen with two input fields for the username and password, as well as buttons for logging in and creating a new account. You can customize the appearance and functionality of the login screen by adding more components and implementing the necessary logic for verifying login credentials and creating new accounts.