Get the APP ID from the Settings Page _Dashboard —> Settings —> App —> General Settings on the MoEngage dashboard and initialize the MoEngage SDK in the Application class’s onCreate().
Initialize the SDK on the main thread inside onCreate() and not create a worker thread and initialize the SDK on that thread.
CriticalAll the configurations are added to the builder before initialization. If you are calling initialize at multiple places, ensure that all the required flags and configurations are set each time you initialize to maintain consistency in behavior.
Exclude MoEngage Storage File from Auto-Backup
This is a mandatory integration step and is very essential to prevent your data from getting corrupted. Android’s auto back-up service periodically backs up Shared Preference files, Database files, etc, more details here. This backup results in MoEngage SDK’s identifiers being backed up and restored after re-install.This restoration of the identifier results in your data being corrupted and users not being reachable via push notifications.
To ensure data is not corrupted after a backup is restored, opt out of MoEngage SDK’s storage files. Refer to Exclude MoEngage Storage File from the Auto-Backup section of the documentation to learn more about which files to exclude. 
