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Install
sudo add-apt-repository ppa:kivy-team/kivy-daily
sudo apt-get update
sudo apt-get install python-kivy
sudo python3.7 -m pip install --upgrade pip wheel setuptools bcm
sudo python3.7 -m pip install docutils pygments
sudo python3.7 -m pip install kivy.deps.gstreamer --extra-index-url https://kivy.org/downloads/packages/simple/
Quick Start
Kivy - Open source Python library for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps.
## Creat a Hello.kv file in the path you run your script
vim hello.kv
### this is for Hello.kv
BoxLayout:
Label:
text: "Hello"
##!/usr/bin/python3.6
from kivy.app import App
class HelloApp(App):
pass
if __name__ == '__main__':
HelloApp().run()
You need to name the kv
file as hello.kv
.
This file is target by the function HelloApp
in main.py
automatically.
Text layout
## hello.kv file
BoxLayout:
Label:
text: "Hello"
Label:
text: "Beautiful"
Label:
text: "World"
Button Layout
## hello.kv file
AddLocationForm:
<AddLocationForm@BoxLayout>:
orientation: "vertical"
BoxLayout:
TextInput:
Button:
text: "Search"
size_hint_x: 1
size_hint_y: 0.3
Button:
text: "Current Location"
size_hint_x: 0.5
AddLocationForm:
<AddLocationForm@BoxLayout>:
orientation: "vertical"
BoxLayout:
height: "40dp"
size_hint_y: None
TextInput:
size_hint_x: 50
Button:
text: "Search"
size_hint_x: 25
Button:
text: "Current Location"
size_hint_x: 25
BoxLayout:
Label:
text: "Palo Alto, MX\nPalo Alto, US"
Events
Responding to Input
In this section, We’d like to acquire the input information from the input box.
For respond the Input message, two things we need to done:
- Assign an ID for TextInput
- line 5: Acquiring Input.
- line 10: Assign the ID “search_box” to TextInput Box
- line 15: active function search_location()
- Assign an function for responding the text
- line 5: import the function
- line 11-12: assigning the function to acquire and respond the massage from TextInput
Weather.kv:
AddLocationForm:
<AddLocationForm@BoxLayout>:
orientation: "vertical"
search_input: search_box # Change one
BoxLayout:
height: "40dp"
size_hint_y: None
TextInput:
id: search_box # Assign an ID
size_hint_x: 50
Button:
text: "Search"
size_hint_x: 25
on_press: root.search_location()
Button:
text: "Current Location"
size_hint_x: 25
BoxLayout:
Label:
text: "Palo Alto, MX\nPalo Alto, US"
main.py
:
##!/usr/local/bin/python3.7
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty
class AddLocationForm(BoxLayout):
search_input = ObjectProperty()
def search_location(self):
print("The user searched for '{}'".format(self.search_input.text))
##
##
class WeatherApp(App):
pass
if __name__ == '__main__':
WeatherApp().run()
Image left: GUI Layout; Image right: result was printed in terminal after clicked the button search.
In the current version Kivy1.11.1,
The function ListView is not is not supported.
Use Recycle As instead.
Take this as example:
from: https://stackoverflow.com/questions/56601384/kivy-unknown-class-listview-error-code
main.py
Light Weather App
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.label import Label
from kivy.properties import BooleanProperty, ObjectProperty
from kivy.uix.recycleboxlayout import RecycleBoxLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
from kivy.network.urlrequest import UrlRequest
from kivy.lang import Builder
import json
class SelectableRecycleBoxLayout(FocusBehavior, LayoutSelectionBehavior,
RecycleBoxLayout):
''' Adds selection and focus behaviour to the view. '''
class SelectableLabel(RecycleDataViewBehavior, Label):
''' Add selection support to the Label '''
index = None
selected = BooleanProperty(False)
selectable = BooleanProperty(True)
def refresh_view_attrs(self, rv, index, data):
''' Catch and handle the view changes '''
self.index = index
return super(SelectableLabel, self).refresh_view_attrs(
rv, index, data)
def on_touch_down(self, touch):
''' Add selection on touch down '''
if super(SelectableLabel, self).on_touch_down(touch):
return True
if self.collide_point(*touch.pos) and self.selectable:
return self.parent.select_with_touch(self.index, touch)
def apply_selection(self, rv, index, is_selected):
''' Respond to the selection of items in the view. '''
self.selected = is_selected
class AddLocationForm(BoxLayout):
search_input = ObjectProperty()
search_results = ObjectProperty()
def search_location(self):
search_template = "https://samples.openweathermap.org/data/2.5/find?q={}&appid=b6907d289e10d714a6e88b30761fae22"
# search_template = "https://api.openweathermap.org/data/2.5/find?q={}&typle=like&appid=xyz" # Replace 'xyz' with your API Key (APPID)
search_url = search_template.format(self.search_input.text)
request = UrlRequest(search_url, self.found_location)
def found_location(self, request, data):
data = json.loads(data.decode()) if not isinstance(data, dict) else data
cities = ["{} ({})".format(d['name'], d['sys']['country']) for d in data['list']]
self.search_results.data = [{'text': str(x)} for x in cities]
print(f"self.search_results.data={self.search_results.data}")
class WeatherRoot(BoxLayout):
pass
class TestApp(App):
title = "Weather App"
def build(self):
return Builder.load_file("main.kv")
if __name__ == '__main__':
TestApp().run()
mian.kv
WeatherRoot:
<WeatherRoot>:
AddLocationForm:
<SelectableLabel>:
# Draw a background to indicate selection
canvas.before:
Color:
rgba: (1, 0, 0, 1) if self.selected else (.0, 0.9, .1, .3)
Rectangle:
pos: self.pos
size: self.size
Color:
rgba: (0, 0.9, .1, .3)
Rectangle:
pos: self.pos
size: self.size
<AddLocationForm>:
orientation: "vertical"
search_input: search_input
search_results: search_results_list
BoxLayout:
height: "40dp"
size_hint_y:None
TextInput:
id: search_input
size_hint_x: 50
focus: True
multiline: False
hint_text: 'Your city name'
on_text_validate: root.search_location()
Button:
text: "Search"
size_hint_x: 25
on_press: root.search_location()
Button:
text: "Current Location"
size_hint_x: 25
RecycleView:
id: search_results_list
viewclass: 'SelectableLabel'
SelectableRecycleBoxLayout:
default_size: None, dp(26)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
multiselect: True
touch_multiselect: True
Examples
UrlRequest
Origin from:coder.work
from kivy.app import App
##kivy.require("1.9.1")
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty
from kivy.network.urlrequest import UrlRequest
class MyWidget(BoxLayout):
def __init__(self,**kwargs):
super(MyWidget,self).__init__(**kwargs)
search_url = "http://api.openweathermap.org/data/2.5/forecast/daily?APPID=ef4f6b76310abad083b96a45a6f547be&q=new%20york"
print search_url
self.request = UrlRequest(search_url, self.res)
print self.request
print "Result: before success", self.request.result,"\n"
def res(self,*args):
print "Result: after success", self.request.result
class MyApp(App):
def build(self):
return MyWidget()
if __name__ == '__main__':
MyApp().run()
Some Awesome Blogs
Build a Mobile Application With the Kivy Python Framework Mike Driscoll Nov 04, 2019
Enjoy~
由於語法渲染問題而影響閱讀體驗, 請移步博客閱讀~
本文GitPage地址
GitHub: Karobben
Blog:Karobben
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