Java BottomNavigationView realizes the bottom navigation bar is very simple

Step 1: Create a page that belongs to him

Step 2: Add a custom Fragment, note that the id name should be the same as the one in the menu

Step 3: Add a new button

Step 4: app:labelVisibilityMode="labeled" Add to see the text content of the button

Step 5: Hide the title bar this.getSupportActionBar().hide();