Logs are not visible on with adb logcat

[tomaka]

When running Substrate/Polkadot within an Android application, the logs are not visible. adb logcat doesn't let you see the stdout/stderr, instead it lets you see only logs that applications explicitly print through an Android-specific function.

I can see two solutions to this:

Solution 1

Modify this function to use the android_logger crate on Android (or a similar crate).

Solution 2

Embrace that the Substrate is supposed to be a library and make this configurable by the user.

[tomaka]

This might be a low priority issue, or even get closed, as there are ways from the Java/Kotlin code to bypass that and retrieve the process's stdout/stderr.

[hanwencheng]

The output stream could be captured on android by getErrorStream for Java or process.errorStream on kotlin