Python| kivy中的文件选择器

Kivy 是Python中一个独立于平台的 GUI 工具。因为它可以在Android、IOS、linux、Windows等平台上运行，基本上是用来开发Android应用的，但不代表不能用在Desktops应用上。

Kivy Tutorial – Learn Kivy with Examples.

文件选择器：

FileChooser 模块提供了各种用于描述、显示和浏览文件系统的类。它很简单，就像我的电脑一样，我们可以从中选择系统中的任何文件。

• FileChooserListView 将文件条目显示为垂直列表中的文本项，其中可以折叠和展开文件夹。
• FileChooserIconView 从左到右显示图标和文本，并根据需要包装它们。

注意：以上两点都提供滚动、选择和基本用户交互。

Basic Approach 
1) import kivy
2) import kivyApp
3) import Boxlayot
4) Set minimum version(optional)
5) create layout class
6) create App class
7) create .kv file
8) return Layout/widget/Class(according to requirement)
9) Run an instance of the class or App

方法的实施：
.py 文件

Python3

# Program to explain how to use File chooser in kivy 
       
# import kivy module    
import kivy  
         
# base Class of your App inherits from the App class.    
# app:always refers to the instance of your application   
from kivy.app import App 
       
# this restrict the kivy version i.e  
# below this kivy version you cannot  
# use the app or software  
kivy.require('1.9.0') 
 
# BoxLayout arranges widgets in either in
# a vertical fashion that is one on top of
# another or in a horizontal fashion
# that is one after another.
from kivy.uix.boxlayout import BoxLayout
 
# create the layout class
class Filechooser(BoxLayout):
    def select(self, *args):
        try: self.label.text = args[1][0]
        except: pass
 
# Create the App class
class FileApp(App):
    def build(self):
        return Filechooser()
 
# run the App
if __name__ == '__main__':
    FileApp().run()

.kv 文件

Python3

#, kv file implementation
 
:
     
    label: label
 
    # Providing the orientation
    orientation: 'vertical'
 
    # Creating the File list / icon view
     
    BoxLayout:
 
        # Creating list view one side
        FileChooserListView:
            canvas.before:
                Color:
                    rgb: .4, .5, .5
                Rectangle:
                    pos: self.pos
                    size: self.size
            on_selection: root.select(*args)
 
        # Creating Icon view other side
        FileChooserIconView:
            canvas.before:
                Color:
                    rgb: .5, .4, .5
                Rectangle:
                    pos: self.pos
                    size: self.size
            on_selection: root.select(*args)
 
    # Adding label
    Label:
        id: label
        size_hint_y: .1
        canvas.before:
            Color:
                rgb: .5, .5, .4
            Rectangle:
                pos: self.pos
                size: self.size
        

输出：