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Build hybrid mobile apps using Python and Cordova

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Jun 17, 2023 pm 01:01 PM

pythoncordovaHybrid application

With the widespread use of mobile devices, more and more companies are beginning to use mobile applications to expand business scope and improve efficiency. In theory, developing a cross-platform mobile app will save time and development costs. In this article, we’ll cover how to build hybrid mobile apps using Python and Cordova for easier cross-platform app development.

First, let us introduce Python. Python is a high-level programming language with the characteristics of easy readability, concise code, and scalability. It is suitable for various fields, including scientific computing, data analysis, web development, game development, etc. Another advantage of Python is that it has a wealth of third-party libraries and tools that can help developers quickly complete applications or reduce the amount of code written.

Cordova is another powerful tool that helps developers create mobile applications with ease. It is a framework based on HTML, CSS, and JavaScript that can be used to build cross-platform mobile applications. It conveniently converts web applications into mobile applications and allows developers to use the same code across all devices, saving time and resources. Cordova provides access to device capabilities, sensors, network and local storage, making applications more powerful.

Next, we’ll cover how to use Python and Cordova together to build hybrid mobile applications. First, we need to install the development environment of Python and Cordova. There are many different development environments for Python to choose from, we recommend Anaconda or Miniconda, which contain all the commonly used Python libraries and tools. For Cordova, we need to install Node.js and Cordova CLI. Node.js is a JavaScript runtime based on the Chrome V8 engine that can be used to develop server-side applications and command-line tools. Cordova CLI is a command line tool for building and running Cordova applications.

Next, we’ll cover how to build a simple mobile application using Python and Cordova. We will create an application that can get data from the API and display it on the mobile device. We will use Python to write the API and Cordova to build the app on mobile devices.

The first step is to write a Python API. We will use the Flask framework to write the API. Flask is a micro web framework that makes it easy to build web applications and APIs. We'll start by installing Flask. In Anaconda or Miniconda, Flask can be installed using the following command:

conda install flask

To write the API, we need to create a Python file and import the necessary libraries and modules. We will also create a route that handles API requests. Here is a code example:

from flask import Flask
import random

app = Flask(__name__)

@app.route('/data')
def get_data():
    data = {
        'id': random.randint(1, 100),
        'name': 'Test Data'
    }
    return data

The above code creates a Flask application and creates a route URL /data that will return a randomly generated data object. We can run this application and visit http://localhost:5000/data in the browser to view the returned data. This can help us confirm that the API is working properly.

Next, we will use the Cordova CLI to create a new Cordova project. In the command line, we will navigate to the directory where we want to create the project and run the following command:

cordova create myapp

This will create a new Cordova project named myapp. We will also add support for a variety of platforms. To do this, we use the following command:

cordova platform add ios
cordova platform add android

This will add support for iOS and Android platforms to our project.

Next, we need to add API calling code to the application. We will use jQuery and Ajax to call our Python API. We need to add the following code to the index.html file:

<!DOCTYPE html>
<html>
    <head>
        <script src="cordova.js"></script>
        <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
        <script>
            $(document).ready(function() {
                $.ajax({
                    url: "http://localhost:5000/data",
                    success: function(data) {
                        $("#data").text(JSON.stringify(data));
                    }
                });
            });
        </script>
    </head>
    <body>
        <h1 id="My-App">My App</h1>
        <p id="data"></p>
    </body>
</html>

The above code uses jQuery and Ajax to send a request to our Python API. It displays the returned data on the page.

Now we can test our application on mobile devices. We can build and run our app using the following command:

cordova build
cordova run ios
cordova run android

This will build our app and deploy it to an iOS or Android device. We can also use Cordova CLI to test the application and debug it.

In conclusion, building hybrid mobile applications using Python and Cordova is a powerful endeavor. Python provides powerful APIs and data processing capabilities for applications, and Cordova provides you with cross-platform mobile application frameworks and tools. Now you have enough knowledge to start building your own hybrid mobile app using Python and Cordova.

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