Note, that it is not enought to grant write access to the SQLite database file. Because SQLite creates a journal file in the directory, the database is located. For that reason write acces to this directory is needed as well.
If no write access to the directory is allowed, it is already posible to open database and read data, but first write operation (INSERT,UPDATE, DELETE, CREATE xxx,..) results in error "unable to open database file" (even though the database file already opened for reading...)