How to switch between fragments during onclick?

Question

I have a project I\'m trying to do. I ran into a little issue and I\'m not sure how to get around it. Below is an image of the application so far.

What I would like

Answer 1

private void openFragment (int number) {

        Fragment fragment = new Fragment();

        switch (number) {
            case FRAGMENT_1:
                fragment = new *Fragment1*();
                break;

            case FRAGMENT_2:
                fragment = new *Fragment2*();
                break;
        }

        getSupportFragmentManager().beginTransaction()
                .replace(R.id.fragment_frame, fragment)
                .commit();
    }