Android底部导航栏可见性

Question

How can I make the bottom Navigation bar appear on selected activities and don't appear on others ? What lines should I add to make it happen

Answer 1

bottom Navigation bar is also a view in your some layout file, you could do like this:

    setContentView(R.layout.activity_main);
    BottomNavigationView bottomNavigationView = (BottomNavigationView)
                    findViewById(R.id.navigation);
    bottomNavigationView.setVisibility(View.INVISIBLE); //In activity you want to hide it
    bottomNavigationView.setVisibility(View.VISIBLE); //In activity you want to show it