String .replace is not working in Android

Question

String s1=s.replace('"', '\"');

here i want to replace " with \"

Answer 1

Try String s1 = s.replace("\"", "\\\"");

Explanation:
When referencing a quote or backslash in a string, i.e. anything inside double quotes, a \ is required to state that you want the quote to appear within the quotes, not end the quotes. Does this make sense?

For example, you would write String message = "She said \"Hello\" the other day.", so that the backslashes represent that the quotes don't actually end the whole string, but are rather to be part of the string.