Implementing back button in webview fragment

Question

I want to implement the back button to my app. I\'m using fragments that each show a different webview. Right now if I press the back button, it closes the app no matter where I

Answer 1

FragmentManager fragmentManager = getSupportFragmentManager();
                FragmentTransaction fragmentTransaction = fragmentManager
                        .beginTransaction();
                First first_act = new First();

                fragmentTransaction.replace(R.id.fragment_container,
                        first_act);
                fragmentTransaction.addToBackStack("first_act");
                fragmentTransaction.commit();

Add these code in mainactivity , and then use this onbackpressed in fragment

@Override
  public void onBackPressed() {

  }