Errno 13 权限被拒绝：'/storage/emulated/0/Download/ kivy app on androd

Question

当我尝试使用 open 函数和 kivy 从 /storage/emulated/0/Download/ 读取图片时，出现错误 13 权限被拒绝。

应用程序在配备 Android 12 的 motorola g32 上正常工作，但无法在配备 Android 10 的 Honor 10 lite 和配备 Android 12 的 Redmi 上工作

我添加了 buildozer.spec 权限： android.permissions = WRITE_EXTERNAL_STORAGE, READ_EXTERNAL_STORAGE

# https://github.com/HeaTTheatR/KivyMD/blob/master/kivymd/icon_definitions.py
from kivymd.app import MDApp
# from kivy.uix.floatlayout import FloatLayout
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
from plyer import filechooser
import sys
from kivy.utils import platform
from datetime import datetime


kv = """
<Demo>

    orientation: "vertical"

    MDBottomNavigation:
        panel_color: "#800080"
        text_color_active: "F5F5F5"
        MDBottomNavigationItem:

            name: "screen 1"
            text: "Головна"
            icon: "google-earth"
            MDLabel:
                id: Vitalii
                text: "@created by "
                pos_hint: {"center_x": 0.7,"center_y":0.03}
            MDLabel:
                id: descr
                text: "Цей додаток працює із зображеннями фомату bmp(bitmap), та символами таблиці ACII(Англійський алфавіт), якщо виникли питання зверніться  телеграм"
                pos_hint: {"center_x": 0.55,"center_y":0.5}
                size_hint: (0.8,0.5)








        MDBottomNavigationItem:
            name: "screen 2"
            text: "Зашифрувати"
            icon: "file-code"

            MDLabel:
                id: selected_path
                text: "Введіть текст"
                pos_hint: {"center_x": 0.6,"center_y":0.88}

            MDLabel:
                id: seria1
                text: "seria 1"
                pos_hint: {"center_x": 0.7,"center_y":0.5}

            MDCheckbox:
                group: "Encrypt_seria" 
                pos_hint: {"center_x": 0.12,"center_y":0.5}
                size_hint: (0.1,0.07)
                on_active: root.Encrypt_checkbox_click(self, self.active, "seria1")

            MDLabel:
                id: seria2
                text: "seria 2"
                pos_hint: {"center_x": 1,"center_y":0.5}

            MDCheckbox:
                group: "Encrypt_seria"
                size_hint: (0.1,0.07)
                pos_hint: {"center_x": 0.425,"center_y":0.5}
                on_active: root.Encrypt_checkbox_click(self, self.active, "seria2")

            MDLabel:
                id: seria3
                text: "seria 3"
                pos_hint: {"center_x": 1.3,"center_y":0.5}

            MDCheckbox:
                group: "Encrypt_seria" 
                size_hint: (0.1,0.07)
                pos_hint: {"center_x": 0.725,"center_y":0.5}
                on_active: root.Encrypt_checkbox_click(self, self.active, "seria3")

            TextInput:
                id: inp1
                size_hint: (0.8,0.3)
                pos_hint: {"center_x": 0.5,"center_y":0.7}
            Button:
                text: "Обрати файл"
                bold: True
                background_color:'00FFCE'
                size_hint: (0.8,0.2)
                pos_hint: {"center_x": 0.5,"center_y":0.34}
                on_press: root.callback()
            Button:
                text: "Зашифрувати"
                bold: True
                background_color:'00FFCE'
                size_hint: (0.8,0.2)
                pos_hint: {"center_x": 0.5,"center_y":0.12}
                on_press: root.encrypt()

        MDBottomNavigationItem:
            name: "screen 3"
            text: "Розшифрувати"
            icon: "file-document"
            MDLabel:
                id: selected_path
                text: 
                pos_hint: {"center_x": 0.6,"center_y":0.98}
            MDLabel:
                id: seria1
                text: "seria 1"
                pos_hint: {"center_x": 0.7,"center_y":0.5}

            MDCheckbox:
                group: "Decrypt_seria" 
                pos_hint: {"center_x": 0.12,"center_y":0.5}
                size_hint: (0.1,0.07)
                on_active: root.Decrypt_checkbox_click(self, self.active, "seria1")

            MDLabel:
                id: seria2
                text: "seria 2"
                pos_hint: {"center_x": 1,"center_y":0.5}

            MDCheckbox:
                group: "Decrypt_seria" 
                size_hint: (0.1,0.07)
                pos_hint: {"center_x": 0.425,"center_y":0.5}
                on_active: root.Decrypt_checkbox_click(self, self.active, "seria2")

            MDLabel:
                id: seria3
                text: "seria 3"
                pos_hint: {"center_x": 1.3,"center_y":0.5}

            MDCheckbox:
                group: "Decrypt_seria" 
                size_hint: (0.1,0.07)
                pos_hint: {"center_x": 0.725,"center_y":0.5}
                on_active: root.Decrypt_checkbox_click(self, self.active, "seria3")

            TextInput:
                id: inp2
                text:
                size_hint: (0.8,0.4)
                pos_hint: {"center_x": 0.5,"center_y":0.76}

            Button:
                text: "Обрати файл"
                bold: True
                background_color:'00FFCE'
                size_hint: (0.8,0.2)
                pos_hint: {"center_x": 0.5,"center_y":0.34}
                on_press: root.callback()
            Button:
                text: "Розкодувати"
                bold: True
                background_color:'00FFCE'
                size_hint: (0.8,0.2)
                pos_hint: {"center_x": 0.5,"center_y":0.12}
                on_press: root.decrypt()






"""


class Demo(BoxLayout):
    global degree
    degree = 1
    Encrypt_checks = []
    Decrypt_checks = []

    def converter_to_bmp(self,path):
        from PIL import Image
        Image.open("sample1.png").save("sample1.bmp")

    def Encrypt_checkbox_click(self, instance, value, topping):
        if value == True:
            Demo.Encrypt_checks.append(topping)
        else:
            Demo.Encrypt_checks.remove(topping)

    def Decrypt_checkbox_click(self, instance, value, topping):
        if value == True:
            Demo.Decrypt_checks.append(topping)
        else:
            Demo.Decrypt_checks.remove(topping)


        

    def decrypt(self):
        try:
            encoded_bmp = open(choice_picture, "rb")

        except:
            self.ids.inp2.text = str(sys.exc_info()[1])

    def encrypt(self):
        try:
            text = self.ids.inp1.text + "!"
            start_bmp = open(choice_picture, 'rb')
            if platform == "android":
                encode_bmp = open(f'/storage/emulated/0/Download/encoded_{time_now}.bmp', 'wb')
             
            encode_bmp.write(start_bmp.read())
            start_bmp.close()
            encode_bmp.close()
            self.ids.inp1.text =  f"Файл збережено у папку Download під назвою: encoded_{time_now}.bmp"
        except:
            self.ids.inp1.text = str(sys.exc_info()[1])

    def callback(self):
        filechooser.open_file(on_selection=self.selected)

    def selected(self, selection):
        # try:
        if selection:

            global choice_picture
            choice_picture = selection[0]
            self.ids.selected_path.text = choice_picture

        # except:
        # self.ids.inp2.text = str(sys.exc_info()[1])


class Main(MDApp):
    def build(self):
        Builder.load_string(kv)
        return Demo()

    def on_start(self):
        if platform == 'android':
            from android.permissions import request_permissions, Permission
            request_permissions([Permission.READ_EXTERNAL_STORAGE, Permission.WRITE_EXTERNAL_STORAGE])

    def process1(self):
        text = self.root.ids.Inp1.text


if __name__ == "__main__":
    Main().run()

Answer 1

我的问题通过反编译 apk 文件并添加： application android:requestLegacyExternalStorage="true" 到 AndroidMainfest.xml 文件来解决 如何反编译 apk 文件然后将其编译回来可以在这个视频中看到 https://www.youtube.com/watch?v=M9fWezuvTUM&t=211s