android - journal log is still written even though PRAGMA deactivation -

I try to disable my journal through my own Android API through my SQLIT DB. I am not successful, a journal file with the following code is still being written. Any sign?

mydb = SQLiteDatabase.openDatabase (mydbpath, null, SQLiteDatabase.OPEN_READWRITE); // Remove Pragma statement and insert mydb.rawQuery ("Presta Journal_mod = Off", blank); Mydb.rawQuery ("Praha Synchronous = Off", blank); String sDeleteStatement = "Remove from texts where in id (select IDO ... otherwise than"; mydb.execSQL (sDeleteStatement);