Cannot write to /storage/emulated/0/MyAppDirectory

[tony19]

Originally posted by @kunalvaibhav in #228 (comment):

I am also getting similar issue but not logging in document directory. I wanted to have separate directory for my app. so trying to save log in "/storage/emulated/0/MyAppDirectory/logs" path. and it never created any log or directory for log.

compileSdk & targetSdk are 31.
implementation 'org.slf4j:slf4j-api:1.7.25'
implementation 'com.github.tony19:logback-android:2.0.0'
and config logback.xml is taken from https://github.com/tony19/logback-android/wiki

app has below permission as well:
android.permission.WRITE_EXTERNAL_STORAGE"
android.permission.MANAGE_EXTERNAL_STORAGE"

Error in logcat:
I/System.out: 00:30:12,036 |-ERROR in ch.qos.logback.core.FileAppender[DebugLog] - Failed to create parent directories for [/storage/emulated/0/MyAppDirectory/logs/debug.log]

[tony19]

@kunalvaibhav Your issue is a bit differeent than #228.

In your case, you configured the log file location to be /storage/emulated/0/MyAppDirectory/logs/debug.log, which is in the root of /storage/emulated/0/. Android 11 doesn't allow writing to that location even with the permissions you requested.

You should change the location to be a subdiretory of Download (note it's singular) or Documents, as in:

/storage/emulated/0/Download/MyAppDirectory/logs/debug.log

# or
/storage/emulated/0/Documents/MyAppDirectory/logs/debug.log