Android Studio Flatpak: The Debug Signing Key Gotcha That Will Waste Your Time

If you are running Android Studio as a Flatpak on Linux, there is a subtle but painful gotcha with debug signing keys that can cost you hours of debugging. The symptoms are generic, the usual troubleshooting steps will mislead you, and the root cause is entirely about where Flatpak stores your keystore. The Problem When you install Android Studio via Flatpak, the app runs inside a sandboxed container. This means the debug signing keystore (debug.keystore) that Android Studio uses is not the one at the usual location: ...

February 23, 2026 · 4 min