How to find logs from android app

[vlad]

what is the best way to find out why android apps are missbehaving?
Is it possible to see somewhere some logs or start them in verbosen Mode?

[poetaster]

I believe logcat on the terminal is what your looking for. If it’s signal related: here is some debugging being done with logcat:

[4.0.1.48] Signal can't sync contacts

REPRODUCIBILITY: 100% BUILD ID: 4.1.0.48 HARDWARE: Sony Xperia XA2 Ultra UI LANGUAGE: Finnish REGRESSION: No DESCRIPTION: Signal application can’t sync contacts from phone address book. logcat indicates that it tries and fails, with sqlite/sqlcipher error messages. PRECONDITIONS: Install Android app support and download Signal from https://signal.org/android/apk/ (or from Play Store should you have access to it). STEPS TO REPRODUCE: Have some contacts with phone numbers in address book I…

[olf]

AOSP, on which AlienDalvik builds, includes logcat.
But its location moved a couple of times, see How to connect to Android log (logcat) [closed] - together.jolla.com and links there.

[olf]

Meanwhile Jolla has created a guide for recording Android (rsp. Alien Dalvik aka “Android App Support”) logs by logcat on SailfishOS, which also covers newer (i.e., recent) versions of Alien Dalvik / “AAS”: Collect Logs with Logcat | Sailfish OS Documentation