Ho risolto aggiungendo questo codice nell'onCreate
Java:
/**********Hooks***********/
drawerLayout = findViewById(R.id.drawer_layout);
navigationView = findViewById(R.id.nav_view);
toolbar = (Toolbar) findViewById(R.id.toolbar_home);
/**********Tool Bar***********/
setSupportActionBar(toolbar);
/**********Navigation Drawer Menu***********/
navigationView.bringToFront();
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawerLayout.addDrawerListener(toggle);
toggle.syncState();
navigationView.setNavigationItemSelectedListener((NavigationView.OnNavigationItemSelectedListener) this);