How does the app access its own generated files？

[ccinsz]

When the app access its own generated files, it raises Permission denied. How does the app access its own generated files？

[freakboy3742]

It's very difficult to answer questions when we don't have any context for those questions.

An app shouldn't have any difficulty accessing files, provided they're written in a location where the operating system has read access. Generally, the locations provided by toga.App.paths will be reliable readable base paths. They may also be writable, depending on the platform

Beyond that, it's difficult to answer why you're getting a Permission Denied error without knowing what you're trying to do, and on what platform you're doing it.

Based on past queries, I'm assuming this is on Android, and I'm assuming you're trying to write to an arbitrary file system location (possibly external storage). This may not be possible; Android requires the use of specific APIs to access files in some locations (such as external storage), and requires that the app ask for additional permissions before using those APIs. However, without details, it's impossible to guide you further.

[ccinsz]

Yes, the android app generates a file, and want to write in this file, but it raises Read-only file system. I want to know how the android app can read and write its own file?

[mhsmith]

You can read and write to the directory given by paths.data. This is writable on all platforms.

[ccinsz]

Does this directory also have execute permission?

[mhsmith]

Yes, but that doesn't mean you can call an executable (#1359).