to dear all Android developers,

Does anyone know what exactly a file is "<database name>.db-journal"
under the /data/data/<packages>/databases ? I created a database by
SQLiteOpenHelper, and wrote something into it for application storage.
However I found that there is no data in the <database name>.db file,
then appears a strange file "<database name>.db-journal".

I'm wonder whether this file was created by lock of database? If it
was, does anyone know how to force the lock released even if the lock
was not created by me?

Best regards,
Nicholas
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