Kivy is open source Module or platform to develop cross platform application in python. it supports python 2 and python 3 both. It is fully implemented in Cython (python library to write c code)

1. Kivy
Seminar on Topic
Presentation By:-
Shobhit Bhatnagar
CSE/3rd/C/C3
1408210126

2. Index of content
 Introduction
 Kivy Language
 Life cycle
 Architecture
 API’s
 First Program
 Packaging
 Kivy Virtual Machine
 Merits/Demarites
 Projects
 Queries

3. Introduction
 Open Source Python framework.
 Cross-platform multi-touch mobile apps
 Implemented in C
 Runs on GPU
 Fresh, Fast, Flexible, Free.

4. KV Language
 Kivy allows construction of widget trees
 It seperates logical and Gui programming
 Parse by python interpreter
 Loaded in python
 Same as XML in android programming with JAVA
 Other Features

5. Life Cycle

6. Architechture

7. Events and Properties

8. API’s
https://kivy.org/docs/api-index.html
https://kivy.org/docs/api-kivy.html
Some API’s offered by kivy are
• Widgets
• Button
• Images
• Video
• Clock
• Storage
• Tools
• Popups
• Layouts

9. First App

10. Packaging
 Create Packagages for Windows using PyInstaller
 Creating packages for OS X
 Creating packages for Android
 Create a package for IOS using Buildozer
• Using Buildozer
• Using PyInstaller without Homebrew
• Packaging with python-for-android
• Packaging with Kivy Launcher
• Packaging with Buildozer

11. Packaging for windows using PyInstaller
PyInstaller is a program that freezes (packages) Python programs into stand-alone executables,
under Windows, Linux, Mac OS X, FreeBSD, Solaris and AIX.
Optional console mode (see standard output and standard error at runtime).
Installing guides
python –m pip install PyInstaller
Or simply
pip install PyInstaller
Packaging commands
python -m PyInstaller --name appname --icon icon.ico main.py
python -m PyInstaller appname.spec

12. Buildozer
Buildozer is a tool that automates the entire build process. It downloads and sets up all the
Prequisites for python-for-android, including the android SDK and NDK, then builds an apk
that can be automatically pushed to the device.
Installing guides
Packaging commands
sudo pip3 install buildozer
buildozer init
Sudo buildozer android debug
Sudo buildozer android debug deploy run
Sudo buildozer osx debug

13. Python-for-android
python-for-android is an open source build tool to let you package Python code
Into standalone android APKs that can be passed around, installed, or uploaded to
Marketplaces such as the Play Store just like any other Android app.
Installing guides
pip install python-for-android
Dependencies
• git
• ant
• Python2 or 3
• cython
• a Java JDK
• zlib (including 32 bit)
• libncurses (including 32 bit)
• unzip
• virtualenv
For python 3 it
depends on
CrystaX NDK and
pythoncrystax

14. Kivy Virtual Machine
Kivy Android applications can only be built in a Linux environment configured with
python-for-android, the Android SDK and the Android NDK.
 Preinstalled Buildozer and other necesary libraries
 No additonal memory required
 Easy to use

15. Merit/demarits
Merits
 Easy, Fast, Simple, Flexible.
 You can get help very fast on IRC channel.
 Relatively simple to deploy with Buildozer without any need to dive too
deep into the details of particular platform.
 You can run your app on desktop also, so there is no need to install some
extra emulators/VMs to get it work.
Demarits
 Take large Memory
 Pretty messy documentation.
 Not that much information in Internet.
 Official examples are quite ugly.

16.  The Kivy GUI Library
 The Python-For-Android compilation tool.
 The Kivy-iOS compilation tool.
 The PyJNIus library for interfacing with Java from Python.
 The PyOBJus library for interfacing with Objective-C from Python.
 The Plyer platform-independent Python wrapper for platform dependent APIs.
 Buildozer - A generic Python packager for Android, iOS, and desktop.
 KivEnt - A 2d Game Engine that provides optimized methods of handling large amounts of
dynamic visual data.
 Kivy Designer - A graphical GUI designer for Kivy built in Kivy.
Projects

17. Any
Queries
?