Question

Like lots of askers on SO, I’m relatively new to java and have attempted to teach myself android programming with some decent success. I’m sure this is trivial to someone with actual knowledge on the subject. I’m working on a app that attempts to fetch data from the net and ‘returns true’ if you get the data and ‘returns false’ if it doesn’t. I want to do something when it returns false but can’t figure out how to properly handle the response. Right now, I just ignore the response an do nothing. Any help?

    public void onBackPressed() {
        Someclass.getinfo().maybeShowInfo(this);
        finish();
    }

What I would like to do is something like (in pseudo code)

    public void onBackPressed() {
        Someclass.getinfo().maybeShowInfo(this);
        // if false is returned
            // do something
            // else
            // finish();
    }

Answer 1

It looks to me like you’ve combined two things that must be separate. Make fetching the data and displaying two methods, by two classes.

private InfoDao infoDao; // This is a class that gets the data; it's a member of the class with the onBackPressed() method

public void onBackPressed() {
    Info info = this.infoDao.find();
    if (info != null) {
        displayInfo();
    }
}