How to add burger menu button to Android

MainActivity.java

//first method (static icon)
onCreate() {
  ...
        getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_menu);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
  ...
}

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        switch (id) {
            case android.R.id.home:
                drawerLayout.openDrawer(Gravity.START);
                return true;
        }

        return super.onOptionsItemSelected(item);
    }
//second method (dynamic icon, transform to back icon — arrow left)
onCreate() {
  ...
       final DrawerLayout drawerLayout = findViewById(R.id.drawer_layout);
       ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar,
       R.string.navigation_drawer_open, R.string.navigation_drawer_close);
       drawerLayout.addDrawerListener(toggle);
       toggle.syncState();
  ...
}