Troubleshooting
1. How to Verify Successful Android SDK Integration
In Android Studio, select the connected device and set the tag value to Metrix.
You should start seeing debug logs.
If the integration is successful, the message Metrix initialization complete will be logged.
Otherwise, an error message will be displayed.
New custom event receivedindicates that a new event has been received from the SDK.Parcel successfully sentindicates that the SDK has synchronized with the server.

2. when the fcm token will be expired?
FCM registration tokens don’t have a fixed expiration time. They remain valid until Google invalidates them or the app/environment changes.
Common invalidation cases:
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App is uninstalled/reinstalled
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App data is cleared
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User restores device from backup
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Token is rotated by Firebase (security or backend changes)
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User logs out (if you delete the token)
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Device OS or Play Services changes (rare but real)