Build An Android App With Python

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Setup Android Sdk And Android Virtual Device

Build your first mobile app in Python | App Development tutorial for Beginners | Great Learning

First you will have to download latest Android SDK from Google and setup your Android Virtual Device. If you like you can directly develop your Android application on your phone device. Skip to Installing SL4A and Python for Android if you want to directly develop on your phone.

1. Download Android SDK. For Linux download the tar ball and for Windows download the executable .

2. Install the SDK. You might also want to read the Installing the SDK document on Androids developer site.

On Linux:

Extract the tarball in any directory of your choice.

On Windows:

Run the executable to install the Android SDK.

3. Go into the tools directory inside the extracted or installed directory.

4. Run the android executable.

On Linux:

Double click the executable to run it.

5. The android executable will start the Android SDK and AVDManager.

6. Click on the Create New AVD to setup the new AVD for your Android application development.

7. When the new AVD is created, select it and click on Start. You will see a Android device emulator screen and an Android Logo, the Android OS is booting, you will have to wait for some time. After some time you will get a fully loaded Android OS on your Android emulator to develop and test your Android Application.

How To Develop Python Mobile App

Do you want to develop apps, but Java is not your companion? Apps are often built with Java, Kotlin, Flutter, and Corona utilizing the Lua Scripting Language . However, Python has recently made its way into every domain. Here, well walk you through how to develop a python app.

The only reason why mobile app development in Python is viable is because of an open-source Python library for constructing mobile applications and other multi-touch application software that is kivy. It was first released in 2011 and a stable one in 2019! Kivy is compatible with different platforms, including IOS, Linux, OS X, Windows, and Android.

We will use Kivy extensively for the front-end application with one another package that is Kivymd. Lets have a quick look at the steps of how to develop a mobile python app.

What Types Of Mobile Products Are Good For Python

Python mobile development was not popular previously. But things have changed with the appearance of different Python GUI frameworks. And currently, this programming language is widely used in mobile apps development.

Python is rather versatile. It can be used for building various apps: starting with web-browsers and ending with simple games.

One more powerful advantage is being cross-platform. So, its possible to develop both Android and iOS apps in Python.

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Packaging Your App For Macos

You can use PyInstaller to create a Mac executable just like you did for Windows. The only requirement is that you run this command on a Mac:

$ pyinstaller main.py -w --onefile

This will create a single file executable in the dist folder. The executable will be the same name as the Python file that you passed to PyInstaller. If youd like to reduce the file size of the executable, or youre using GStreamer in your application, then check out Kivys packaging page for macOS for more information.

How To Build Our Project

Python App Development For Android : QPython3

So let’s get started with building our project. Open up your terminal and type in the following command:

django-admin startproject myapp

This creates a Django application called myapp in your root folder.

Change directory to it by typing cd myapp and type in python manage.py runserver. Then you should get this:

Now the server has started. Next, to test it in the browser visit 127.0.0.1:8000.

And boom! You should see that Django has been setup successfully.

The next thing we need to do is create our Django app. In Django, the project folder serves as the root while the app serves as the application itself.

To create a Django app, make sure you are still in the directory, then type python manage.py startapp todo. This creates a To-do app in our myapp project like this:

Then inside the todo folder we should see something like this:

We will take a further look at the files when we begin working with them.

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Great Examples Of Python Mobile Development Results

Are you still hesitating if its real to realize an awesome idea in this programming language? Then look at some great examples of Python mobile development that will definitely inspire you.

This is a widely known social internet service for sharing visual content with other users. In its mobile app, one of the Python frameworks is used for working quickly with the enormous volume of information.

This is a super famous social network for sharing photos with millions of accounts. Its hard to find a person in the whole world who is not acquainted with this app. But did you know that its backend is written in Python? This is one of the greatest examples of applying this programming language for building mobile apps.

This is a service for listening to music online without downloading it. This mobile app has a difficult backend structure. It includes several services connected to its own messaging protocol. 80% of them are developed in Python.

So, get inspired by the successful examples, take into account the tips youve learned from this article, and start realizing your dream project using Python!

How To Write Android Apps In Python

Want to build Android Apps in Python? More than 3 billion devices in this world run on android. That makes it one of the most or probably the most important smartphone OS in the world. Assuming the importance of android, there are a lot of android building tools such as Android Studio, Kotlin, etc.

But ever wondered if android apps can be made in Python as well?

Yes, that is possible and this article is directed towards explaining and demonstrating to the readers how an android app can be written in Python.

The framework for this task will be employed as Kivy and APK packaging will be executed by Buildozer.

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Top Python Tools For App Development

For building Python apps, you will also need the best tools that make your python application development task easy. Fortunately, it offers various tools for mobile development and web development. So, lets check out the top tools based on their reviews and features. This table will help you to find out which tool is the best in terms of features, reviews, and ratings.

Logo
  • Allows developing mobile & web apps with less code
  • Provides the best documentation than other tools
  • Safe and secure
  • Shorter syntaxes and readable code
  • Ease of creating widgets
  • Comes with a custom-built UI toolkit
  • Open source Python library and GUI framework
  • Single codebase for multiple platforms
  • BeeWare provides specialized tools, such as Toga and Briefcase
  • Uses the native user interface
  • Kivy and BeeWare are cross-platform tools that help to build iOS and Android applications
  • Easy to learn and deploy
  • Ideal for small web application
  • Faster than more powerful frameworks
  • Built-in development server and fast debugger
  • Integrated support for unit testing
  • Lightweight and modular design allows for a flexible web framework
  • Supports URL generation to allow changes
  • Generates URLs to static resources
  • Supports routes and traversal
  • Easy to run multiple HTTP servers
  • A powerful configuration system
  • Provides flexible plugin system
  • Built-in profiling, coverage, and testing support

Beeware: Python Mobile Apps Framework

Python for Android | How to create Android App with Python | Great Learning

BeeWare is a set of libraries and tools used for creating and delivering native Python programs. The library and toolset work together to let a developer create cross-platform native GUI port Python applications. BeeWare also includes the Toga GUI toolkit, which is OS native, Python native apps, and cross platform UI applications. Rubicon Java is also a Python library for interacting with Java libraries.

A Briefcase is a tool for packaging Python programs into distributable artifacts that can be shipped to end-users. Furthermore, pre-compiled Python binaries are utilized on systems where official Python installers are not available. Rubicon ObjC is a Python-based library tool for working with Objective C libraries on macOS and iOS.

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Issues In Creating Android App With Python

Though Android app development using Python is possible, it wont be as effective and reliable as Android app development using Java. As we all know that Java is the official language for Android, as Google declared it. Java for Android is like the Standard of Android, and other languages that we use might not be as up to the mark as Java. Let us see some of the issues that might occur:

  • Other frameworks might not support every feature of the Android operating system.
  • Own tools can not always be used.
  • These codes might not run very fast as they first generate the native code and then optimize using native compilers.
  • Sometimes the High-level graphics might not be supported.
  • The app you will develop will work perfectly fine on your local machine, but the animations are not smooth when running it on Android. Also, as it still runs as an instance of Python, it is slow.

Python has achieved greater heights and is overgrowing in recent years and thus can be used to develop applications in the coming years on both enterprise and product basis. Moreover, Python has proven itself as a competent language approachable for newcomers but powerful in the hands of experts.

Create And Run Python Apps On Your Android Phone

Quinn Dombrowski via Flickr. CC BY-SA 2.0

Learning and using Python is fun. Thanks to its growing popularity, there are a plethora of ways it can be used to make the world of computing better than what it is today.

More Linux resources

Imagine building and running python applications, whether it’s a command-line tool developed to fetch your favorite curated articles from the Internet, or starting a web server that runs right in the palm of your hand, all with just an Android mobile device and open source tools. This would change how you view your mobile device entirely, changing it from a device that merely lets you consume content to a device that helps you be creative.

In this article, I’ll demonstrate all of the tools, software packages, steps, and all the bells and whistles required to build, run, and test a simple Python application on any Android mobile device. I use the Flask framework to create a simple Hello, World! app running on a simple but powerful web server. And best of all, it all happens on the phone. No laptop or desktop required.

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Build An Android Application With Kivy Python Framework

If youre a Python developer thinking about getting started with mobile development, then the Kivy framework is your best bet. With Kivy, you can develop platform-independent applications that compile for iOS, Android, Windows, macOS, and Linux. In this article, well cover Android specifically because it is the most used.

Well build a simple random number generator app that you can install on your phone and test when you are done. To follow along with this article, you should be familiar with Python. Lets get started!

By Step Guide To Build Android Apps Using Python

Python For Android for Android

Are you curious about developing android apps but Java is not your companion? Android universe is mainly build using Java, Kotlin, Flutter, and Corona using Lua Scripting Language but in recent times, Python has made its way into every domain and android is no different. In this series of articles, we will look at how to set-up the required environment, the basics of developing an android app, referencing the documentation, and how to move ahead with your projects.

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A Complete Guide To Python For App Development

I have an app idea, but I dont know which programming language should I choose to make it run smoother.

Inevitably, you must have tried surfing the internet if this is the case. Didnt you? And if you have seen , you must know Python is the most searched programming language in the period of February 2020 February 2021.

After looking at the trends, no one wants to miss knowing Python. Rest assured. We have created this comprehensive guide to Python for app development to help you learn about Python. So, lets get started.

Contents

  • Compatible with major platforms and systems
  • The large and robust Python standard library
  • The standard library supports many Internet protocols, such as HTML and XML
  • Allow using GUI toolkit, like PyQT, PyJs, PyGUI, Kivy, PyGTK, and WxPython

Millions of developers use Python to build mobile and web applications, write data-crunching pipelines, generate reports, automate tests, conduct research, and several other tasks in a multitude of domains. People admire it for being an adjustable desk language.

However, before you choose it for software development, ensure you know its pros and cons. Lets dig into the next section to check more about its advantages and disadvantages.

Developing Android Apps With Python Using Kivy

In this post we are going to cover how to develop a Natural User Interface application using Kivy, a Python cross platform library, but more specifically we are going to use KivyMD, which is a collection of Material Design compliant widgets that can be use inside Kivy, making our app suitable for mobile devices and Android systems.

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Can Python Make Android Apps

  • Which is better for future Java or Python?
  • You can definitely develop an Android app using Python. And this thing is not only limited to python, you can in fact develop Android applications in many more languages other than Java. These languages involve- Python, Java, Kotlin, C, C++, Lua, C#, Corona, HTML5, JavaScript, and some more.

    More Things We Can Do

    Android Chat App in Python

    That was a very simple introductory project to show you how Kivy works for the purpose of this Kivy Python tutorial.

    So, what else can this bad boy do?

    One smart thing we can do with Kivy, is to separate the UI layer from the code just as we do in Android Studio . We would do this by creating separate Kivy files that could then display buttons and the like.

    So, lets create a new Kivy file and name it HelloWorld. In here, add the following code:

    < label> :text: "Hello World"

    Make sure this file is saved in the same folder as your Python file using the extension .kv, and then edit the original code slightly:

    import kivykivy.requirefrom kivy.app import Appfrom kivy.uix.button import Labelclass HelloWorld:    def build:        return LabelhelloWorld = HelloWorldhelloWorld.run

    Youll notice that all we did was to remove the contents of the brackets following Label. Its important that we give the class and the Kivy file the same name, as this is how Python knows to associate the two! Hit run, and you should find that everything looks just as it did before!

    Now you can do things like changing the color and size of the label:

    < label> :text: "Hello World"pos: 0, 100size: 100, 50color: .8,.9,0,1font_size: 32

    Note that for this to work, you also need to import color.

    from kivy.graphics import Color

    This will simply stack your widgets top to bottom, or left to right, depending on whether you set it to verticle or horizontal.

    You can then display this using the following code:

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    Some More Things To Consider

  • Performance Issues: The app you will develop will work perfectly fine on your local machine, but when you try to run it in android, the animations are not so smooth. Also, as it still runs as an instance of python, it is slow.
  • Convert to android: One of the major tasks is to convert the python Kivy application into an Android package and it can only be done on a Linux OS. The additional packages like python-to-android, Android SDK, bulldozer are heavy and require a lot of time to build and debug the app. All the Kivy and Kivymd libraries are converted into Cython, and these are used by the Android system. This process is usually done with high precision.
  • Still under development: This is an open-source project, and still a lot of work is going on under the hood. Always try to update the packages so you dont face any issues.
  • Using The Kv Language

    Kivy also provides a design language called KV that you can use with your Kivy applications. The KV language lets you separate your interface design from the applications logic. This follows the principle and is part of the Model-View-Controller architectural pattern. You can update the previous example to use the KV language:

    fromkivy.appimportAppfromkivy.uix.buttonimportButtonclassButtonApp:defbuild:returnButtondefon_press_button:printif__name__=='__main__':app=ButtonAppapp.run

    This code might look a bit odd at first glance, as it creates a Button without setting any of its attributes or binding it to any events. Whats happening here is that Kivy will automatically look for a file that has the same name as the class in lowercase, without the App part of the class name.

    In this case, the class name is ButtonApp, so Kivy will look for a file named button.kv. If that file exists and is properly formatted, then Kivy will use it to load up the UI. Go ahead and create this file and add the following code:

     1< Button> : 2    text: 'Press me' 3    size_hint:  4    pos_hint:  5    on_press: app.on_press_button

    Heres what each line does:

    You can set up all of your widgets and layouts inside one or more KV language files. The KV language also supports importing Python modules in KV, creating dynamic classes, and much more. For full details, check out Kivys guide to the KV Language.

    Now youre ready to create a real application!

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