How to make a Android app by Python3

To make an Android app using Python 3, you can use the Kivy framework. Kivy is a free and open-source Python library that allows you to create cross-platform applications, including those for Android.

Here’s a basic example of a Python 3 program that creates a simple “Hello, World!” app using Kivy:

pythonCopy codeimport kivy
from kivy.app import App
from kivy.uix.label import Label

class MyApp(App):

    def build(self):
        return Label(text='Hello, World!')

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

This program defines a new class MyApp that inherits from App and overrides its build method to return a new Label widget with the text “Hello, World!”. The if __name__ == '__main__' block at the end of the file creates a new instance of MyApp and runs it.

To build and deploy this app on an Android device, you can use the Kivy Buildozer tool. Buildozer allows you to package your Python code and dependencies into an Android APK that can be installed on a device.

Here’s a basic example of how to use Buildozer to build and deploy the above “Hello, World!” app:

1. Install Buildozer and its dependencies:bashCopy codesudo apt-get update sudo apt-get install -y python3-pip sudo pip3 install --upgrade pip virtualenv sudo apt-get install -y build-essential git python3-setuptools sudo apt-get install -y python3-kivy libgles2-mesa-dev libgstreamer-plugins-base1.0-dev sudo apt-get install -y zlib1g-dev
2. Create a new virtual environment:bashCopy codevirtualenv venv source venv/bin/activate
3. Install the necessary Python packages:bashCopy codepip3 install kivy pip3 install buildozer
4. Create a new buildozer.spec file in the same directory as your Python file:bashCopy codebuildozer init
5. Modify the buildozer.spec file to include your Python file and other relevant settings. Here’s an example:makefileCopy code[app] # (str) Title of your application title = Hello World # (str) Package name package.name = helloworld # (str) Package domain (needed for android/ios packaging) package.domain = org.test # (str) Source code where the main.py live source.dir = . # (list) Source files to include (let empty to include all the files) source.include_exts = py # (list) Application requirements requirements = kivy [buildozer] # (str) Path to build artifact storage, absolute or relative to spec file build_dir = ./build # (str) Path to a directory where buildozer will search for android ndk # (if empty, it will download its own) android.ndk_path = # (str) Path to a directory where buildozer will search for android sdk # (if empty, it will download its own) android.sdk_path = # (str) Android API to use android.api = 28 # (str) Minimum API required android.minapi = 21 # (str) Android NDK version to use android.ndk = 19c # (int) Android