NavigationDrawerActivity.java

package com.schibsted.spain.barista.sample;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;

public class NavigationDrawerActivity extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {

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

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    final DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer);

    toolbar.setNavigationIcon(R.drawable.ic_action_menu);
    toolbar.setNavigationOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        drawerLayout.openDrawer(GravityCompat.START);
      }
    });
  }

  @Override
  public boolean onNavigationItemSelected(@NonNull MenuItem item) {
    return false;
  }
}