By Dusty Phillips
Construct cellular apps successfully with Kivy, the Python-powered graphical toolkit for growing typical person interfaces with dependent multitouch aid. With this hands-on advisor, you’ll examine step by step tips to construct and set up a whole Kivy app for iOS and Android units. If you’re simply starting to paintings with Python, yet are kind of acquainted with its syntax, you’re able to go.
Each bankruptcy comprises routines, utilizing examples that run on Python three and Python 2.7. find out how Kivy simplifies cellular improvement with its cross-platform API and domain-specific Kv language, and why this loose and open resource toolkit is perfect for advertisement products.
- layout customized widgets with the Kv language
- Delve into Kivy occasions, occasion handlers, and properties
- Dynamically switch which Kivy widgets are displayed
- comprehend and follow iterative improvement principles
- Create simple animations, utilizing Canvas and photos primitives
- shop neighborhood info with Kivy’s robust key worth store
- upload easy gestures to change among app views
- enhance your app’s usability with Kivy’s integrated widgets
- installation the app for your Android or iOS machine, utilizing Buildozer
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Additional info for Creating Apps in Kivy
Like most user interface toolkits, Kivy provides an event loop. This is executed by your Python code when you call the run method on WeatherApp. Underneath the hood, this method is constantly cycling through events such as touch or mouse motion, clock ticks, keyboard entry, accelerometer input, and more. When something interesting happens, it does the necessary processing to make sure that your code knows the event has hap‐ pened and has a chance to respond. So if an event is something that happens, an event handler is something that responds to something that happens.
This normally happens in the small parts of the KV language file that map to actual Python execution. Imports in the KV language start with the characters #: import followed by an alias for the module or member being imported. This is followed by the full path to the 36 | Chapter 3: Manipulating Widgets module or class to be imported. The alias can then be used throughout the KV file as a reference to that item. In this case, you need to import ListAdapter and the ListItem Button classes. See Example 3-4 to learn why.