Navigation and lifecycle behavior is a common source of subtle bugs in Android apps, and a place where plausible agent-written code can fail.
Why these areas are tricky
Android can recreate activities, process death can wipe in-memory state, and users can arrive through deep links in the middle of a flow. Code that works on the happy path may crash or lose state in these cases.
What to check in agent output
- Back stack behavior: does back return to the expected screen?
- State restoration: does the screen survive rotation and process death?
- Argument handling: are navigation arguments validated and typed?
- Deep links: does an external link land on the right destination with the right state?
Give the agent a pattern
Document how your app defines routes, passes arguments, and exposes navigation events from view models. Include an example. Without it, the agent may mix approaches.
Test it
Write instrumented or UI tests for important flows, including rotation and returning from the background. Enable settings that destroy activities to expose state-loss bugs.
Review with a checklist
For every navigation change, ask what happens on recreation, on a cold start through a deep link, and when arguments are missing.
Takeaway
Agents are good at writing the visible screen and weaker at the invisible lifecycle edge cases, so concentrate review there.
Continue with the book
Explore the full treatment, worked examples, and exercises in Agentic Android App Development.
Adapted from Agentic Android App Development, published by Choral Software. Article text and original examples © 2026 Choral Software. All rights reserved.