<?xml version="1.0" encoding="utf-8"?>

<FrameLayout
    android:id="@+id/main_frame"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_above="@id/main_nav"
    app:layout_constraintBottom_toTopOf="@+id/main_nav"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

</FrameLayout>

<android.support.design.widget.BottomNavigationView
    android:id="@+id/main_nav"
    android:layout_width="0dp"
    android:layout_height="49dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/main_frame"
    app:menu="@menu/nav_items" />

public class ListTab extends AppCompatActivity {

private BottomNavigationItemView mMainNav;
private FrameLayout mMainFrame;

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

    mMainFrame = findViewById(R.id.main_frame);
    mMainNav = findViewById(R.id.main_nav);
    mMainNav.bringToFront();
    mMainNav.setOn
}