cipher_default_kdf_iter become invaild

[cczscq]

Hi Nick Parker:
I have some problem about sqlcipher.
1.How to set the default cipher_default_kdf_iter in your source code?
2.I use SQLiteDatabaseHook to set cipher_default_kdf_iter, After I restart my app some times, it always report "CREATE TABLE android_metadata failed,SQLiteException: file is encrypted or is not a database". My old databases become invaild.
3.I has set cipher_default_kdf_iter to 4000, the method named openOrCreateDatabase spend about 180ms; But when the phone reboot, this method go back to 1800+ms;

I search the problems in google groups,try a lot of methods, none works.
Do you have some better advice?

[developernotes]

Hello cczscq,

You can set cipher_default_kdf_iter using a SQLiteDatabaseHook, invoking it via PRAGMA on the preKey function. For questions 2 & 3, are you doing it as I just described? These questions are best placed on the SQLCipher mailing list here.