Kivy 应用程序加载后崩溃

Question

我是工程学士学位的学生，仍然在我的第二年，但我正在尝试使用 Python 和 Kivy （我试图自己学习）开发一个基本的助手应用程序。

我为应用程序编写的代码在我的 windows 系统上运行良好，但为了将源代码打包到 apk 中，我使用 Google Collab 帐户并安装了 Ubuntu 和 buildozer 环境。 该 apk 也成功生成，但在任何 android 设备上安装后，应用程序在显示“(Kivy Logo)Loading...”后立即崩溃

我尝试更改部分代码以及规范文件内容，但没有任何帮助。 我是 Kivy 和应用程序开发的新手，所以我（老实说）对 logcat 和调试 apk 不太了解。

如果有人可以帮助我，我将不胜感激。

这是我的代码：

from kivy.app import App
from kivy.config import Config
Config.set('graphics','resizable',True)
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.pagelayout import PageLayout
from kivy.uix.gridlayout import GridLayout
import datetime
from kivy.uix.popup import Popup
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
import os
from kivy.clock import Clock
from kivy.core.window import Window

OldNameOfFile=""
OldText=""
firsttime=1
pcheck=0
FileListString=""

class MyLayout(FloatLayout):
    def ButtonMaker(self):
        self.Timeb=Button(
            text="Time",size_hint=(.3,.3),pos_hint={"x":.09,"y":.6})
        self.WriteB=Button(
            text="Press here to \nwrite a note",size_hint=(.3,.3),pos_hint={"x":.6,"y":.6})
        self.NoteB=Button(
            text="Press here to view\n a written note",size_hint=(.3,.3),pos_hint={"x":.09,"y":.2})
        self.SWB=Button(
            text="Press here for \nStop-Watch",size_hint=(.3,.3),pos_hint={"x":.6,"y":.2})
        self.STOPWATCHStartB=Button(
            text="Start",size_hint=(.25,.20),pos_hint={"x":.04,"y":.3})
        self.STOPWATCHStopB=Button(
            text="Stop",size_hint=(.25,.20),pos_hint={"x":.36,"y":.3})
        self.STOPWATCHCloseB=Button(
            text="Close",size_hint=(.25,.20),pos_hint={"x":.68,"y":.3})
        self.STOPWATCHPauseB=Button(
            text="Pause",size_hint=(.25,.20),pos_hint={"x":.2,"y":.05})
        self.STOPWATCHResetB=Button(
            text="Reset",size_hint=(.25,.20),pos_hint={"x":.53,"y":.05})
        self.STOPWATCHDisp=TextInput(
            text=" 00:00:00:00",size_hint=(.9,.3),font_size='125sp',readonly=True,pos_hint={"x":.05,"y":.6})
        self.TimeBTime=Button(
            text="The time is :",background_color="black",font_size=40,pos_hint={"x":0,"y":.3})
        self.TimeBCloseB=Button(
            text="Click to close",size_hint=(.2,.2),pos_hint={"x":.35,"y":.2})
        self.WriteBNameB=Button(
            text="Enter name of file here : (or Enter name of already existing file to edit before entering text)",size_hint=(1,.09),background_color="black",pos_hint={"x":0.01,"y":.9})
        self.WriteBTIB=Button(
            text="Enter text here :",size_hint=(1,.09),background_color="black",pos_hint={"x":0.01,"y":.78})
        self.WriteBSubmitB=Button(
            text="Save",size_hint=(.4,.1),pos_hint={"x":0.07,"y":.1})
        self.WriteBCloseB=Button(
            text="Close",size_hint=(.4,.1),pos_hint={"x":.53,"y":.1})
        self.WriteBTI=TextInput(
            font_size=30,size_hint=(.95,.55),pos_hint={"x":0.02,"y":.25},multiline=True)
        self.WriteBName=TextInput(
            font_size=20,size_hint=(.95,.07),pos_hint={"x":0.02,"y":.85})
        self.WriteBp=Button(
            text="Empty name error...",background_color="black",size_hint=(.4,.08),pos_hint={"x":0.3,"y":0.01})
        self.NoteBName=TextInput(
            text="Select a file name from below files",font_size=20,size_hint=(.95,.07),pos_hint={"x":.02,"y":.85})
        self.NoteBNameB=Button(
            text="Enter name of file here :",size_hint=(1,.09),background_color="black",pos_hint={"x":0.01,"y":.9})
        self.NoteBTextData=TextInput(
            font_size=20,size_hint=(.95,.55),pos_hint={"x":0.02,"y":.25},readonly=True,multiline=True)
        self.NoteBTextDataB=Button(
            text="Data of files :",size_hint=(1,.09),background_color="black",pos_hint={"x":0.01,"y":.78})
        self.NoteBSubmitB=Button(
            text="Submit",size_hint=(.4,.1),pos_hint={"x":0.07,"y":.13})
        self.NoteBCloseB=Button(
            text="Close",size_hint=(.4,.1),pos_hint={"x":0.53,"y":.13})
        self.NoteBDeleteB=Button(
            text="Delete this",size_hint=(.38,.09),pos_hint={"x":0.3,"y":0.02})
        self.NoteBp=Button(
            text="Empty name error...",background_color="black",size_hint=(.4,.1),pos_hint={"x":0.3,"y":0.02})

        self.HomePage1List=[
            self.Timeb,self.WriteB,self.NoteB,self.SWB]
        self.STOPWATCHList=[
            self.STOPWATCHStartB,self.STOPWATCHStopB,self.STOPWATCHCloseB,self.STOPWATCHPauseB,self.STOPWATCHResetB,self.STOPWATCHDisp]
        self.TimeBList=[
            self.TimeBTime,self.TimeBCloseB]
        self.WriteBList=[
            self.WriteBNameB,self.WriteBTIB,self.WriteBName,self.WriteBTI,self.WriteBSubmitB,self.WriteBCloseB]
        self.NoteBList=[
            self.NoteBNameB,self.NoteBName,self.NoteBTextDataB,self.NoteBTextData,self.NoteBSubmitB,self.NoteBCloseB,self.NoteBDeleteB]
    def BindButtons(self):
        self.SWB.bind(on_press=self.StopWatchPress)
        self.Timeb.bind(on_press=self.TimeBPress)
        self.WriteB.bind(on_press=self.WriteBPress)
        self.NoteB.bind(on_press=self.NoteBPress)
        self.STOPWATCHStartB.bind(on_press=self.OnStart)
        self.STOPWATCHStopB.bind(on_press=self.OnStop)
        self.STOPWATCHResetB.bind(on_press=self.OnReset)
        self.STOPWATCHPauseB.bind(on_press=self.OnPause)
        self.STOPWATCHCloseB.bind(on_press=self.StopWatchClose)
        self.TimeBCloseB.bind(on_press=self.TimeBClose)
        self.WriteBCloseB.bind(on_press=self.WriteBClose)
        self.WriteBSubmitB.bind(on_press=self.Saveandwrite)
        self.NoteBSubmitB.bind(on_press=self.OpenFile)
        self.NoteBCloseB.bind(on_press=self.NoteBClose)
        self.NoteBDeleteB.bind(on_press=self.NoteBDelete)
    def AddHomePage1(self):
        for b in self.HomePage1List:
            self.add_widget(b)
    def RemHomePage1(self):
        for b in self.HomePage1List:
            self.remove_widget(b)

    def __init__(self,**kwargs):
        super().__init__(**kwargs)
        self.ButtonMaker()
        self.BindButtons()
        self.AddHomePage1()

    def StopWatchPress(self,button):
        self.RemHomePage1()
        self.STOPWATCHpause=0
        self.STOPWATCHstop=0
        Clock.unschedule(self.increment_STOPWATCHtime)
        self.STOPWATCHtime=["00","00","00","0"]
        self.STOPWATCHDisp.text=" 00:00:00:00"
        for b in self.STOPWATCHList:
            self.add_widget(b)
    def TimeBPress(self,button):
        self.RemHomePage1()
        time=datetime.datetime.now()
        time=time.strftime("%H:%M:%S")
        self.TimeBTime.text=self.TimeBTime.text[:13]+str(time)
        for b in self.TimeBList:
            self.add_widget(b)
    def WriteBPress(self,button):
        self.RemHomePage1()
        global firsttime
        firsttime=1
        for b in self.WriteBList:
            self.add_widget(b)
    def NoteBPress(self,button):
        self.RemHomePage1()
        path=os.getcwd()
        FileList=os.listdir(path)
        global FileListString
        FileListString="Names of all files are : \n"
        for k in FileList:
            if k[-4:]==".txt":
                FileListString=FileListString+k+"\n"
        self.NoteBTextData.text=FileListString
        for b in self.NoteBList:
            self.add_widget(b)

    def StopWatchClose(self,button):
        for b in self.STOPWATCHList:
            self.remove_widget(b)
        self.AddHomePage1()
    def TimeBClose(self,button):
        self.remove_widget(self.TimeBCloseB)
        self.remove_widget(self.TimeBTime)
        self.AddHomePage1()
    def Saveandwrite(self,button):
        global OldNameOfFile
        global OldText
        global firsttime
        if firsttime==1 or (OldNameOfFile!=self.WriteBName.text.strip() or OldText!=self.WriteBTI.text):
            file="new"
            NameOfFile=self.WriteBName.text.strip()
        else:
            file="old"
        if file=="old":
            return
        global pcheck
        OldNameOfFile=NameOfFile
        if NameOfFile=="":
            if pcheck==0:
                self.add_widget(self.WriteBp)
                pcheck=1
            return
        if NameOfFile!="":
            self.remove_widget(self.WriteBp)
            pcheck=0
        if NameOfFile[-4:]==".txt":
            NameOfFile=NameOfFile[:-4]
        try:
            NewF=open(NameOfFile+".txt","r")
            if self.WriteBTI.text=="":
                self.WriteBTI.text=NewF.read()
            NewF.close()
        except:
            pass
        NewF=open(NameOfFile+".txt","w")
        self.WriteBName.text=NameOfFile
        Text=self.WriteBTI.text
        OldText=Text
        NewF.write(Text)
        NewF.close()
        firsttime=0
        return
    def WriteBClose(self,button):
        for b in self.WriteBList:
            self.remove_widget(b)
        global pcheck
        global OldNameOfFile
        global firsttime
        firsttime=1
        OldNameOfFile=""
        self.WriteBName.text=""
        self.WriteBTI.text=""
        if pcheck==1:
            pcheck=0
            self.remove_widget(self.WriteBp)
        self.AddHomePage1()
    def OpenFile(self,button):
        global FileListString
        NameOfFile=self.NoteBName.text.strip()
        global pcheck
        if NameOfFile=="":
            if pcheck==0:
                self.add_widget(self.NoteBp)
                pcheck=1
            return
        if NameOfFile!="":
            self.remove_widget(self.NoteBp)
            pcheck=0
        try:
            if NameOfFile[-4:]==".txt":
                NameOfFile=NameOfFile[:-4]
            NewF=open(NameOfFile+".txt","r")
            self.NoteBTextData.text=NewF.read()
        except FileNotFoundError:
            self.NoteBTextData.text=FileListString
            self.NoteBName.text="No Such File.. Select a name from below files.."
    def NoteBDelete(self,button):
        NameOfFile=self.NoteBName.text.strip()
        if NameOfFile[-4:]==".txt":
            NameOfFile=NameOfFile[:-4]
        try:
            os.remove(NameOfFile+".txt")
        except:
            pass
        path=os.getcwd()
        FileList=os.listdir(path)
        global FileListString
        FileListString="Names of all files are : \n"
        for k in FileList:
            if k[-4:]==".txt":
                FileListString=FileListString+k+"\n"
        self.NoteBTextData.text=FileListString
        self.NoteBName.text="Select a file name from below files"
    def NoteBClose(self,button):
        for b in self.NoteBList:
            self.remove_widget(b)
        global pcheck
        global FileListString
        FileListString=""
        self.NoteBName.text="Select a file name from below files"
        if pcheck==1:
            pcheck=0
            self.remove_widget(self.NoteBp)
        self.AddHomePage1()
    def increment_STOPWATCHtime(self,interval):
        if int(self.STOPWATCHtime[3])<75:
            self.STOPWATCHtime[3]=str(int(self.STOPWATCHtime[3])+2)
        else:
            self.STOPWATCHtime[3]=str(int(self.STOPWATCHtime[3])+4)
        if int(self.STOPWATCHtime[3])>90:
            self.STOPWATCHtime[2]=str(int(self.STOPWATCHtime[2])+1)
            self.STOPWATCHtime[3]="00"
        if self.STOPWATCHtime[2]=="60":
            self.STOPWATCHtime[1]=str(int(self.STOPWATCHtime[1])+1)
            self.STOPWATCHtime[2]="00"
            self.STOPWATCHtime[3]="30"
        if self.STOPWATCHtime[1]=="60":
            self.STOPWATCHtime[0]=str(int(self.STOPWATCHtime[0])+1)
            self.STOPWATCHtime[1]="00"
        if self.STOPWATCHtime[0]=="24":
            self.STOPWATCHtime=["00","00","00","00"]
        for k in range(4):
            if int(self.STOPWATCHtime[k])<10:
                self.STOPWATCHtime[k]="0"+str(int(self.STOPWATCHtime[k]))
        self.STOPWATCHDisp.text=" "
        for k in range(4):
            self.STOPWATCHDisp.text+=self.STOPWATCHtime[k]
            if k<3: self.STOPWATCHDisp.text+=":"
    def OnPause(self,button):
        self.STOPWATCHpause=1
        Clock.unschedule(self.increment_STOPWATCHtime)
    def OnReset(self,button):
        Clock.unschedule(self.increment_STOPWATCHtime)
        self.STOPWATCHtime=["00","00","00","00"]
        self.STOPWATCHDisp.text=" 00:00:00:00"
        self.STOPWATCHpause=0
    def OnStart(self,button):
        Clock.unschedule(self.increment_STOPWATCHtime)
        if self.STOPWATCHpause==0 and self.STOPWATCHstop!=1:
            self.STOPWATCHtime=["00","00","00","00"]
            self.STOPWATCHDisp.text=" 00:00:00:00"
        elif self.STOPWATCHstop==1:
            self.STOPWATCHtime=["00","00","00","00"]
            self.STOPWATCHDisp.text=" 00:00:00:00"
        Clock.schedule_interval(self.increment_STOPWATCHtime,0.02)
        self.STOPWATCHpause=0
        self.STOPWATCHstop=0
    def OnStop(self,button):
        Clock.unschedule(self.increment_STOPWATCHtime)
        self.STOPWATCHstop=1
        self.STOPWATCHpause=0

class DemoApp(App):
    def build(self):
        return MyLayout()


if __name__=="__main__":
    demo=DemoApp()
    demo.run()

我还必须为 os 模块添加配方，如果我没记错的话，但我也不知道那个过程。 任何帮助将非常感激。

谢谢你。

Answer 1

我找到了答案。

https://play.google.com/store/apps/details?id=com.apptiva.logviewer

使用上面的应用程序，我找到了应用程序崩溃时的日志，并了解了正在发生的错误。 它是：按钮的背景颜色可以是 windows 上的字符串，但它需要 rgba 代码才能在 Android 上运行。 也许 android 还没有添加该功能，以接受 colors 的字符串。 在上面的代码中，我将其设置为“黑色”，我必须将其更改为 (0,0,0,1)。 基本上，这个错误是“无法将字符串转换为浮点数：b”，这就是我理解问题出在“黑色”的方式。

And special praise to Kivy launcher app: https://play.google.com/store/apps/details?id=org.kivy.pygame Helped a lot in checking if the errors are rectified without actually packaging the app, which takes lot的时间。

我还更改了创建和保存文件的路径，然后再次读取它们。