BadTokenException

Android

TL;DR

BadTokenException indicates a ui failure on Android that interrupts the current user flow.

Symptoms

BadTokenException appears in logcat
The app crashes or the action fails

Common Causes

UI lifecycle call happens in an invalid state
View or constraint APIs run in the wrong context

How to Verify

Reproduce with deterministic input and capture full logsInspect the first throw site and recent changes around it

Quick Fixes

Add guard checks and a safe fallback path
Disable or rollback the risky code path behind a flag

Proper Fixes

Enforce contracts with types, runtime checks, and tests
Refactor ownership and lifecycle boundaries to remove the failure mode

Example Stack Trace

BadTokenException at com.example.app.MainActivity.onCreate(MainActivity.kt:42)

Related Errors

NSInvalidArgumentException TypeError Cannot Read Properties Of Undefined NetworkError Failed To Fetch