Kivy Tutorial: How to do CRUD Method with Kivy & Json File – Part 4

Welcome to the fourth part of our Kivy tutorial series. In this tutorial, we will learn how to read saved Json data from a button (BTN) in Kivy.

Prerequisites

Before proceeding with this tutorial, make sure you have completed the previous parts of the Kivy tutorial series. Also, ensure that you have a basic understanding of Python and Kivy.

Reading Saved Json Data from BTN

To read saved Json data from a button in Kivy, you can use the following steps:

1. Create a button widget in your Kivy app.
2. Bind the button to a function that will read the saved Json data.
3. Implement the function to read the saved Json data from a file.
4. Update the Kivy app to display the read data on the screen.

Example Code:

    
from kivy.app import App
from kivy.uix.button import Button
import json

class MyApp(App):
    def load_json_data(self, instance):
        with open('data.json', 'r') as file:
            data = json.load(file)
            # Update the app to display the read data
            # e.g. update labels or text input fields with the read data

    def build(self):
        btn = Button(text='Read Json Data')
        btn.bind(on_press=self.load_json_data)
        return btn

MyApp().run()
    
  

Conclusion

Congratulations! You have learned how to read saved Json data from a button in a Kivy app. This skill will come in handy when you need to retrieve and display data from a Json file in your Kivy applications. In the next tutorial, we will cover how to update and delete Json data using CRUD methods in Kivy.

Stay tuned for the next part of our Kivy tutorial series!