sdk/src/com/socialize/facebook/Facebook.java
public void setAccessExpiresIn(String expiresIn) {
        if (expiresIn != null) {
            long expires = expiresIn.equals("0")
                    ? 0
                    : System.currentTimeMillis() + Long.parseLong(expiresIn) * 1000L;
            setAccessExpires(expires);
        }
    }
public void setAccessExpiresIn(String expiresIn) {
        if (expiresIn != null) {
            long expires = expiresIn.equals("0")
                    ? 0
                    : System.currentTimeMillis() + Long.parseLong(expiresIn) * 1000L;
            setAccessExpires(expires);
        }
    }
Set the current session's duration (in seconds since Unix epoch), or "0"
if session doesn't expire.

@param expiresIn
- duration in seconds (or 0 if the session doesn't expire)