Android Sqlite Special Characters

I created a sqlite database and imported data from csv as UTF-8. It shows some unknown characters, such as . In my Android code, I dealt with regular expressions. Now I have a problem with \n. My regex is not detecting \nand it will replace \and n.

Pattern pattern = Pattern.compile("[^a-zA-Z0-9$' '-:|,&.\"\"()\n]");
Matcher matcher = pattern.matcher(descriptionfromDb);
String description = matcher.replaceAll("");

I also tried using android Html.fromHtmland Spannable, and both do not escape the character , and \ndo not convert to a new line.