【发布时间】：2021-07-25 09:53:03
【问题描述】：
堆栈溢出 我是 Kivy、buildozer 和一般应用程序开发的新手，并试图找出某个问题：
- 我将我的计算器应用部署到我的 Android 设备。
- 当我打开它时，我看到
Button小部件的文本有奇怪的白色方形符号而不是文本。 - 不得不提一下，文本应该是黑色的，当我按下它时，符号消失，
Button变为空。 - 我尝试在不使用自定义字体的情况下进行构建，但没有任何改变。该程序在电脑上运行良好。
这是我应用的截图：calculator app screenshot
还有我的main.py：
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.lang import Builder
from kivy.core.window import Window
from kivy.config import Config
import math
Config.set('kivy', 'window_icon', "calculator.ico")
class CalculatorLayout(Widget):
operators = {'+', '-', '*', '/'}
forbidden = {'+', '/', '*', '.'}
all = {'+', '-', '*', '/', '.'}
md = {'*', '/'}
def __init__(self):
super().__init__()
self.exp = '0'
def add(self, arg):
split = self.split()
if self.exp == '0' and not(arg in self.forbidden):
self.exp = arg
else:
if (arg == '.') and (split[-1].count('.') == 1 or split[-1] in self.operators):
pass
elif (arg in self.operators) and (self.exp[-1] in self.all):
pass
else:
self.exp += arg
self.update()
def submit(self):
if self.exp[-1] in self.all:
self.exp = self.exp[:-1]
self.exp = str(eval(self.exp))
self.update()
def pow(self):
if self.exp[-1] in self.all:
self.exp = self.exp[:-1]
self.exp = str(eval(self.exp)**2)
self.update()
def sqrt(self):
if self.exp[-1] in self.all:
self.exp = self.exp[:-1]
self.exp = str(math.sqrt(eval(self.exp)))
self.update()
def delete(self):
self.exp = self.exp[:-1]
if not self.exp:
self.exp = '0'
self.update()
def clear(self):
self.exp = '0'
self.update()
def split(self):
self.expSplit = []
self.elem = ''
for i, char in enumerate(self.exp):
if char in self.operators:
if self.elem:
self.expSplit.append(self.elem)
self.elem = ''
self.expSplit.append(char)
else:
self.elem += char
if self.elem:
self.expSplit.append(self.elem)
self.elem = ''
print(self.expSplit)
return self.expSplit
def update(self):
self.box_design.text = self.exp
class CalculatorApp(App):
Builder.load_file('main.kv')
def build(self):
self.icon = "calculator.png"
Window.clearcolor = (232/255, 232/255, 232/255, 1)
return CalculatorLayout()
if __name__ == "__main__":
CalculatorApp().run()
这是我的 main.kv：
#:import rgb functions.rgb
#:import Window kivy.core.window.Window
<Button>
size_hint: 0.33333333, 0.2
background_normal: ''
background_color: rgb(201, 201, 201, 1)
color: "black"
font_name: "digital-7.ttf"
font_size: 24
background_down: ""
on_press:
self.background_color = rgb(158, 158, 158, 1)
on_release:
self.background_color = rgb(201, 201, 201, 1)
<CalculatorLayout>
box_design: box
GridLayout:
rows: 2
size: root.width, root.height
BoxLayout:
size_hint_y: 0.2
orientation: "horizontal"
Label:
id: box
padding: (5, 0)
text_size: self.size
valign: "middle"
halign: "right"
font_size: 48
font_name: 'digital-7.ttf'
text: "0"
color: rgb(0, 0, 0, 1)
GridLayout:
cols: 2
spacing: 1
StackLayout:
size_hint_x: 0.8
spacing: 1
Button:
text: 'Clear'
font_size: 24 if Window.size[0] >= 400 else 20
font_size: 16 if Window.size[0] <= 300 else 24
on_press: root.clear()
Button:
text: 'x^2'
font_size: 24 if Window.size[0] >= 400 else 20
font_size: 16 if Window.size[0] <= 300 else 24
on_press: root.pow()
Button:
text: "sqrt(x)"
font_size: 24 if Window.size[0] >= 400 else 20
font_size: 16 if Window.size[0] <= 300 else 24
on_press: root.sqrt()
Button:
text: '7'
on_press: root.add(self.text)
Button:
text: '8'
on_press: root.add(self.text)
Button:
text: '9'
on_press: root.add(self.text)
Button:
text: '4'
on_press: root.add(self.text)
Button:
text: '5'
on_press: root.add(self.text)
Button:
text: '6'
on_press: root.add(self.text)
Button:
text: '1'
on_press: root.add(self.text)
Button:
text: '2'
on_press: root.add(self.text)
Button:
text: '3'
on_press: root.add(self.text)
Button:
text: '0'
on_press: root.add(self.text)
Button:
text: '.'
on_press: root.add(self.text)
Button:
text: '='
on_press: root.submit()
StackLayout:
spacing: 1
size_hint_x: 0.2
Button:
size_hint_x: 1
text: "Delete" if Window.size[0] >= 350 else "Del"
font_size: 24 if Window.size[0] >= 400 else 20
font_size: 16 if Window.size[0] <= 300 else 24
on_press: root.delete()
Button:
size_hint_x: 1
text: '/'
on_press: root.add(self.text)
Button:
size_hint_x: 1
text: '*'
on_press: root.add(self.text)
Button:
size_hint_x: 1
text: '-'
on_press: root.add(self.text)
Button:
size_hint_x: 1
text: '+'
on_press: root.add(self.text)
【问题讨论】：
-
看起来很像字体问题。如果你在一些文本中包含一个标准的 kivy 标签会发生什么，该文本是否也不好？
-
同样的问题，我确实指定了没有自定义字体的构建不能解决问题。也只是安卓的问题，因为我的程序在PC上运行流畅。
标签： python android kivy buildozer