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This answer would be better if it explained a little bit about why it's "emulated". I believe Android does some hack to fake a FAT fs that's actually backed by something better, but I don't know the details and clicked this question hoping to learn something new.
Here's an excellent article about it: xda-developers. Read Android's Storage Journey for details, the summary is: Early Android devices were short on internal storage and relied on physically external SD cards that traditionally use FAT family of filesystem to ensure compatibility with most of the PCs refer to Microsoft's dominance on PC world.
UMS exposes the device at block level and disconnects the SD card from Android framework un-mounts , thus making whole data unavailable to apps and possibly breaking many functionalities. MTP doesn't expose block device but works through software stack. MTP host runs on Android as an app android. Execute the commands again: See the difference in permissions of same files and directories.
Irfan Latif Irfan Latif I think I misunderstand the part about MTP. If not, couldn't Google use ext4 filesystem for FUSE implementation as that could also enforce permissions checks needed for an app to access only their data in shared storage? Firelord when discussing emulation, focus isn't on MTP implementation. SessionParams class. Android 6. It does this by maintaining three distinct views of all mounted storage devices:.
At Zygote fork time, we create a mount namespace for each running app and bind mount the appropriate initial view into place. Later, when runtime permissions are granted, vold jumps into the mount namespace of already-running apps and bind mounts the upgraded view into place. Note that permission downgrades always result in the app being killed. The setns functionality used to implement this feature requires at least Linux 3. Content and code samples on this page are subject to the licenses described in the Content License.
Docs Getting Started About. Core Topics Architecture. Overview Architecture. Modular System Components. Modular Kernels. HIDL General. HIDL Java. ConfigStore HAL. Device Tree Overlays. Vendor NDK. Vendor Interface Object. Core Concepts. Camera Features. Bluetooth and NFC. Calling and Messaging. ACTS Tests. Surface and SurfaceHolder. I am in a rooted environment, and it still doesn't work normally. Sadly it doesn't seem to work on Android 12, and I can't find any file manager app that can reach the folder anymore How can you say it's not working on android 12?
VishalNehra I can say it because I have Pixel 4 with Android 12 beta 5, and it failed on all file managers that used to be able to allow it: Total Commander, X-plorer, and Mixplorer.
I'm the one that created the post. I thought this workaround would stay for longer. I was sadly also been informed it was "fixed". Ok i tried on android 12 emulator. So this is a miss from Google's end, I'm assuming this will be fixed by the time 12 reaches production. For android 12 will create a new issue later. Will fix this as a part of this issue only. VishalNehra Do you think there is a solution for Android 12? I'll try to look for some way later, will update here. The android 12 images are quite laggy on my Macbook.
This however, doesn't work in case of DocumentFile in Android 11, as when we try to iterate to newPath it'll throw an exception saying the newPath is not valid. If your phone updated from Android 10 to 11 recently and amaze can't access these folders, uninstalling amaze and installing it again would fix the issue. Skip to content. Star 3. New issue. Jump to bottom. Milestone v3. Copy link. They don't even show up as recent files in anything else but the built-in file manager in Android not google files, I have that disabled There should be a n actual API call specifically for file managers to access that location but as I'm not completely savvy on the inner workings of modern Android APIs I don't exactly know what it's called.
VishalNehra added this to the v3. Even with opt-out of scoped storage with the 2 methods no actions at all compile with SDK 28, no extra flag in AndroidManifest. TranceLove mentioned this issue Oct 21, VishalNehra removed this from the v3. TranceLove mentioned this issue Nov 12, Update Android SDK
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