public class MainActivity extends AppCompatActivity {
    private BottomBar mBottomBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mBottomBar = BottomBar.attach(this, savedInstanceState);
        mBottomBar.setItemsFromMenu(R.menu.bottombar_menu, new OnMenuTabSelectedListener() {
            @Override
            public void onMenuItemSelected(int resId) {
                if (resId == R.id.bottomBarItemOne) {
                    // the user selected item number one
                }
            }
        });

        // Setting colors for different tabs when there's more than three of them.
        // You can set colors for tabs in three different ways as shown below.
        mBottomBar.mapColorForTab(0, ContextCompat.getColor(this, R.color.colorAccent));
        mBottomBar.mapColorForTab(1, 0xFF5D4037);
        mBottomBar.mapColorForTab(2, "#7B1FA2");
        mBottomBar.mapColorForTab(3, "#FF5252");
        mBottomBar.mapColorForTab(4, "#FF9800");
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        // Necessary to restore the BottomBar's state, otherwise we would
        // lose the current tab on orientation change.
        mBottomBar.onSaveInstanceState(outState);
    }
}

// Disable the left bar on tablets and behave exactly the same on mobile and tablets instead.
mBottomBar.noTabletGoodness();

// Use the dark theme. Ignored on mobile when there are more than three tabs.
mBottomBar.useDarkTheme(true);

// Set the color for the active tab. Ignored on mobile when there are more than three tabs.
mBottomBar.setActiveTabColor("#009688");

// Use custom text appearance in tab titles.
mBottomBar.setTextAppearance(R.style.MyTextAppearance);

// Use custom typeface that's located at the "/src/main/assets" directory. If using with
// custom text appearance, set the text appearance first.
mBottomBar.setTypeFace("MyFont.ttf");

// Instead of attach(), use attachShy:
mBottomBar = BottomBar.attachShy((CoordinatorLayout) findViewById(R.id.myCoordinator), 
    findViewById(R.id.myScrollingContent), savedInstanceState);

// If you use normal Fragments, just change the first argument to getFragmentManager(). It's pure magic!
mBottomBar.setFragmentItems(getSupportFragmentManager(), R.id.fragmentContainer,
    new BottomBarFragment(SampleFragment.newInstance("Content for recents."), R.drawable.ic_recents, "Recents"),
    new BottomBarFragment(SampleFragment.newInstance("Content for favorites."), R.drawable.ic_favorites, "Favorites"),
    new BottomBarFragment(SampleFragment.newInstance("Content for nearby stuff."), R.drawable.ic_nearby, "Nearby")
);

mBottomBar.setItems(
        new BottomBarTab(R.drawable.ic_recents, "Recents"),
        new BottomBarTab(R.drawable.ic_favorites, "Favorites"),
        new BottomBarTab(R.drawable.ic_nearby, "Nearby")
);

// Listen for tab changes
mBottomBar.setOnItemSelectedListener(new OnTabSelectedListener() {
    @Override
    public void onItemSelected(int position) {
        // user selected a different tab
    }
});

mBottomBar.attach(findViewById(R.id.myContent), savedInstanceState);

mBottomBar.noTopOffset();

mBottomBar.noNavBarGoodness();

mBottomBar.attach(findViewById(R.id.fragmentContainer), savedInstanceState);