如何解决KivyMD：MDFileManager无法加载
我正在尝试使用kivymd中的MDFileManager访问文件夹路径。我可以使用系统上的kivy启动器将其打开，但是当打包为android时，方法调用self.fileM.show(path)不会返回任何内容，并且多次单击会显示ReferenceError: weakly-referenced object no longer exists。
感谢帮助。
注意：仅显示问题原始代码中的一个片段。
main.py
import os
import kivy
import kivymd
from kivymd.app import MDApp
from kivymd.uix.button import MDRaisedButton
from kivymd.uix.gridlayout import MDGridLayout
from kivymd.uix.filemanager import MDFileManager
class YT_Downloader(MDGridLayout):
def __init__(self,**kwargs):
super().__init__(**kwargs)
self.cols = 1
self.add_widget(MDRaisedButton(text='click',on_press=self.openfile))
def openfile(self,obj):
path = '/storage/emulated/0/'
self.fileM = MDFileManager(
select_path = self.get_path
)
self.fileM.show(path)
def get_path(self,obj):
pass
class DemoApp(MDApp):
def build(self):
return YT_Downloader()
DemoApp().run()
buildozer.spec
[app]
# (str) Title of your application
title = YT
# (str) Package name
package.name = youtube_app
# (str) Package domain (needed for android/ios packaging)
package.domain = org.test
# (str) Source code where the main.py live
source.dir = .
# (list) Source files to include (let empty to include all the files)
source.include_exts =
# (list) List of inclusions using pattern matching
#source.include_patterns = assets/*,images/*.png
# (list) Source files to exclude (let empty to not exclude anything)
#source.exclude_exts = spec
# (list) List of directory to exclude (let empty to not exclude anything)
#source.exclude_dirs = tests,bin
# (list) List of exclusions using pattern matching
#source.exclude_patterns = license,images/*/*.jpg
# (str) Application versioning (method 1)
version = 0.1
# (str) Application versioning (method 2)
# version.regex = __version__ = ['"](.*)['"]
# version.filename = %(source.dir)s/main.py
# (list) Application requirements
# comma separated e.g. requirements = sqlite3,kivy
requirements = python3,kivy,kivymd,pytube3==9.6.4,typing_extensions,pillow
# (str) Custom source folders for requirements
# Sets custom source for any requirements with recipes
# requirements.source.kivy = ../../kivy
# (list) Garden requirements
#garden_requirements =
# (str) Presplash of the application
#presplash.filename = %(source.dir)s/data/presplash.png
# (str) Icon of the application
#icon.filename = %(source.dir)s/data/icon.png
# (str) Supported orientation (one of landscape,sensorLandscape,portrait or all)
orientation = portrait
# (list) List of service to declare
#services = NAME:ENTRYPOINT_TO_PY,NAME2:ENTRYPOINT2_TO_PY
#
# OSX Specific
#
#
# author = © Copyright Info
# change the major version of python used by the app
osx.python_version = 3.7.7
# Kivy version to use
osx.kivy_version = 1.11.1
#
# Android specific
#
# (bool) Indicate if the application should be fullscreen or not
fullscreen = 0
# (string) Presplash background color (for new android toolchain)
# Supported formats are: #RRGGBB #AARRGGBB or one of the following names:
# red,blue,green,black,white,gray,cyan,magenta,yellow,lightgray,# darkgray,grey,lightgrey,darkgrey,aqua,fuchsia,lime,maroon,navy,# olive,purple,silver,teal.
#android.presplash_color = #FFFFFF
# (list) Permissions
android.permissions = INTERNET,READ_EXTERNAL_STORAGE,WRITE_EXTERNAL_STORAGE
# (int) Target Android API,should be as high as possible.
#android.api = 27
# (int) Minimum API your APK will support.
#android.minapi = 21
# (int) Android SDK version to use
#android.sdk = 20
# (str) Android NDK version to use
#android.ndk = 19b
# (int) Android NDK API to use. This is the minimum API your app will support,it should usually match android.minapi.
#android.ndk_api = 21
# (bool) Use --private data storage (True) or --dir public storage (False)
#android.private_storage = True
# (str) Android NDK directory (if empty,it will be automatically downloaded.)
#android.ndk_path =
# (str) Android SDK directory (if empty,it will be automatically downloaded.)
#android.sdk_path =
# (str) ANT directory (if empty,it will be automatically downloaded.)
#android.ant_path =
# (bool) If True,then skip trying to update the Android sdk
# This can be useful to avoid excess Internet downloads or save time
# when an update is due and you just want to test/build your package
# android.skip_update = False
# (bool) If True,then automatically accept SDK license
# agreements. This is intended for automation only. If set to False,# the default,you will be shown the license when first running
# buildozer.
# android.accept_sdk_license = False
# (str) Android entry point,default is ok for Kivy-based app
#android.entrypoint = org.renpy.android.PythonActivity
# (str) Android app theme,default is ok for Kivy-based app
# android.apptheme = "@android:style/Theme.NoTitleBar"
# (list) Pattern to whitelist for the whole project
#android.whitelist =
# (str) Path to a custom whitelist file
#android.whitelist_src =
# (str) Path to a custom blacklist file
#android.blacklist_src =
# (list) List of Java .jar files to add to the libs so that pyjnius can access
# their classes. Don't add jars that you do not need,since extra jars can slow
# down the build process. Allows wildcards matching,for example:
# OUYA-ODK/libs/*.jar
#android.add_jars = foo.jar,bar.jar,path/to/more/*.jar
# (list) List of Java files to add to the android project (can be java or a
# directory containing the files)
#android.add_src =
# (list) Android AAR archives to add (currently works only with sdl2_gradle
# bootstrap)
#android.add_aars =
# (list) Gradle dependencies to add (currently works only with sdl2_gradle
# bootstrap)
#android.gradle_dependencies =
# (list) add java compile options
# this can for example be necessary when importing certain java libraries using the 'android.gradle_dependencies' option
# see https://developer.android.com/studio/write/java8-support for further information
# android.add_compile_options = "sourceCompatibility = 1.8","targetCompatibility = 1.8"
# (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies}
# please enclose in double quotes
# e.g. android.gradle_repositories = "maven { url 'https://kotlin.bintray.com/ktor' }"
#android.add_gradle_repositories =
# (list) packaging options to add
# see https://google.github.io/android-gradle-dsl/current/com.android.build.gradle.internal.dsl.PackagingOptions.html
# can be necessary to solve conflicts in gradle_dependencies
# please enclose in double quotes
# e.g. android.add_packaging_options = "exclude 'META-INF/common.kotlin_module'","exclude 'META-INF/*.kotlin_module'"
#android.add_gradle_repositories =
# (list) Java classes to add as activities to the manifest.
#android.add_activities = com.example.ExampleActivity
# (str) OUYA Console category. Should be one of GAME or APP
# If you leave this blank,OUYA support will not be enabled
#android.ouya.category = GAME
# (str) Filename of OUYA Console icon. It must be a 732x412 png image.
#android.ouya.icon.filename = %(source.dir)s/data/ouya_icon.png
# (str) XML file to include as an intent filters in <activity> tag
#android.manifest.intent_filters =
# (str) launchMode to set for the main activity
#android.manifest.launch_mode = standard
# (list) Android additional libraries to copy into libs/armeabi
#android.add_libs_armeabi = libs/android/*.so
#android.add_libs_armeabi_v7a = libs/android-v7/*.so
#android.add_libs_arm64_v8a = libs/android-v8/*.so
#android.add_libs_x86 = libs/android-x86/*.so
#android.add_libs_mips = libs/android-mips/*.so
# (bool) Indicate whether the screen should stay on
# Don't forget to add the WAKE_LOCK permission if you set this to True
#android.wakelock = False
# (list) Android application meta-data to set (key=value format)
#android.meta_data =
# (list) Android library project to add (will be added in the
# project.properties automatically.)
#android.library_references =
# (list) Android shared libraries which will be added to AndroidManifest.xml using <uses-library> tag
#android.uses_library =
# (str) Android logcat filters to use
#android.logcat_filters = *:S python:D
# (bool) Copy library instead of making a libpymodules.so
#android.copy_libs = 1
# (str) The Android arch to build for,choices: armeabi-v7a,arm64-v8a,x86,x86_64
android.arch = armeabi-v7a
# (int) overrides automatic versionCode computation (used in build.gradle)
# this is not the same as app version and should only be edited if you know what you're doing
# android.numeric_version = 1
#
# Python for android (p4a) specific
#
# (str) python-for-android fork to use,defaults to upstream (kivy)
#p4a.fork = kivy
# (str) python-for-android branch to use,defaults to master
#p4a.branch = master
# (str) python-for-android git clone directory (if empty,it will be automatically cloned from github)
#p4a.source_dir =
# (str) The directory in which python-for-android should look for your own build recipes (if any)
#p4a.local_recipes =
# (str) Filename to the hook for p4a
#p4a.hook =
# (str) Bootstrap to use for android builds
# p4a.bootstrap = sdl2
# (int) port number to specify an explicit --port= p4a argument (eg for bootstrap flask)
#p4a.port =
#
# iOS specific
#
# (str) Path to a custom kivy-ios folder
#ios.kivy_ios_dir = ../kivy-ios
# Alternately,specify the URL and branch of a git checkout:
ios.kivy_ios_url = https://github.com/kivy/kivy-ios
ios.kivy_ios_branch = master
# Another platform dependency: ios-deploy
# Uncomment to use a custom checkout
#ios.ios_deploy_dir = ../ios_deploy
# Or specify URL and branch
ios.ios_deploy_url = https://github.com/phonegap/ios-deploy
ios.ios_deploy_branch = 1.7.0
# (str) Name of the certificate to use for signing the debug version
# Get a list of available identities: buildozer ios list_identities
#ios.codesign.debug = "iPhone Developer: <lastname> <firstname> (<hexstring>)"
# (str) Name of the certificate to use for signing the release version
#ios.codesign.release = %(ios.codesign.debug)s
[buildozer]
# (int) Log level (0 = error only,1 = info,2 = debug (with command output))
log_level = 2
# (int) Display warning if buildozer is run as root (0 = False,1 = True)
warn_on_root = 1
# (str) Path to build artifact storage,absolute or relative to spec file
# build_dir = ./.buildozer
# (str) Path to build output (i.e. .apk,.ipa) storage
# bin_dir = ./bin
# -----------------------------------------------------------------------------
# List as sections
#
# You can define all the "list" as [section:key].
# Each line will be considered as a option to the list.
# Let's take [app] / source.exclude_patterns.
# Instead of doing:
#
#[app]
#source.exclude_patterns = license,data/audio/*.wav,data/images/original/*
#
# This can be translated into:
#
#[app:source.exclude_patterns]
#license
#data/audio/*.wav
#data/images/original/*
#
# -----------------------------------------------------------------------------
# Profiles
#
# You can extend section / key with a profile
# For example,you want to deploy a demo version of your application without
# HD content. You could first change the title to add "(demo)" in the name
# and extend the excluded directories to remove the HD content.
#
#[app@demo]
#title = My Application (demo)
#
#[app:source.exclude_patterns@demo]
#images/hd/*
#
# Then,invoke the command line with the "demo" profile:
#
#buildozer --profile demo android debug
解决方法
尝试进行此操作。
import os
app_path = os.path.dirname(os.path.abspath(__file__))
可能是路径中的某种错误，请像上面一样尝试并从那里调试。
,在下面尝试此代码，
request_permissions([Permission.READ_EXTERNAL_STORAGE,Permission.WRITE_EXTERNAL_STORAGE])
dir_primary = primary_external_storage_path()
self.path = os.path.join(dir_primary,'Download')
您基本上需要存储权限才能访问Android中的内部存储。为此，您可以使用此代码段
if platform == 'android':
import android
from android.permissions import request_permissions,Permission
request_permissions([Permission.WRITE_EXTERNAL_STORAGE,Permission.READ_EXTERNAL_STORAGE])
此外，您还必须在buildozer.spec文件的要求中添加Android。现在访问“下载文件夹”的路径，您可以使用os.path.join(os.getenv('EXTERNAL_STORAGE'),'Downloads')
def openfile(self,obj):
path = os.path.join(os.getenv('EXTERNAL_STORAGE'),'Downloads')
self.fileM = MDFileManager(
select_path = self.get_path
)
self.fileM.show(path)
Android中还有一个primary_external_storage_path()选项，但有时在少数版本的Android中会出现错误
from android.storage import primary_external_storage_path
ext_path = primary_external_storage_path()
def openfile(self,obj):
path = os.path.join(ext_path,'Downloads')
self.fileM = MDFileManager(
select_path = self.get_path
)
self.fileM.show(path)
您可以使用这两种方法中的任何一种。另外，如果代码段（用于权限）给出错误（在请求权限后崩溃或启动时崩溃），则可能必须更新kivy版本。根据您的buildozer.spec文件的要求，您可以编写Python,kivy来使用最新版本，而不用编写Python,kivy=2.0.0rc4
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