Unable to replace/navigate fragments

Question

I am trying to navigate from one fragment to another. These two fragments are 100% different, there is no ViewPager or something like that to connect them. Here

Answer 1

You are trying to replace firstView with the new fragment, but firstView is not a fragment, its' a RelativeLayout.

You cannot replace a fragment defined statically in the layout file. You can only replace fragments that you added dynamically via a FragmentTransaction.

None of your Layout contains fragment in layout.

A new Fragment will replace an existing Fragment that was previously added to the container.

Take look on this.