diff --git a/src/it/reyboz/bustorino/ActivityPrincipal.java b/src/it/reyboz/bustorino/ActivityPrincipal.java
index 52b199d..bba046d 100644
--- a/src/it/reyboz/bustorino/ActivityPrincipal.java
+++ b/src/it/reyboz/bustorino/ActivityPrincipal.java
@@ -1,100 +1,113 @@
 package it.reyboz.bustorino;
 
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.os.Bundle;
 import android.view.MenuItem;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.appcompat.widget.Toolbar;
 import androidx.core.app.NavUtils;
+import androidx.core.view.GravityCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
 
 import com.google.android.material.navigation.NavigationView;
 
 import it.reyboz.bustorino.middleware.GeneralActivity;
 
 public class ActivityPrincipal extends GeneralActivity {
     private DrawerLayout mDrawer;
     private NavigationView mNavView;
     private ActionBarDrawerToggle drawerToggle;
 
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.new_main_activity);
 
         Toolbar mToolbar = findViewById(R.id.default_toolbar);
         setSupportActionBar(mToolbar);
 
         //getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
 
         mDrawer = findViewById(R.id.drawer_layout);
         drawerToggle = setupDrawerToggle(mToolbar);
 
         // Setup toggle to display hamburger icon with nice animation
         drawerToggle.setDrawerIndicatorEnabled(true);
 
         drawerToggle.syncState();
         mNavView = findViewById(R.id.nvView);
 
         setupDrawerContent(mNavView);
 
 
     }
     private ActionBarDrawerToggle setupDrawerToggle(Toolbar toolbar) {
-
         // NOTE: Make sure you pass in a valid toolbar reference.  ActionBarDrawToggle() does not require it
-
         // and will not render the hamburger icon without it.
-
         return new ActionBarDrawerToggle(this, mDrawer, toolbar, R.string.drawer_open,  R.string.drawer_close);
 
     }
     private void setupDrawerContent(NavigationView navigationView) {
         navigationView.setNavigationItemSelectedListener(
                 menuItem -> {
 
                     //selectDrawerItem(menuItem);
 
                     return true;
 
                 });
 
     }
 
 
     // `onPostCreate` called when activity start-up is complete after `onStart()`
     // NOTE 1: Make sure to override the method with only a single `Bundle` argument
     // Note 2: Make sure you implement the correct `onPostCreate(Bundle savedInstanceState)` method.
     // There are 2 signatures and only `onPostCreate(Bundle state)` shows the hamburger icon.
     @Override
     protected void onPostCreate(Bundle savedInstanceState) {
         super.onPostCreate(savedInstanceState);
         // Sync the toggle state after onRestoreInstanceState has occurred.
         drawerToggle.syncState();
     }
 
     @Override
     public void onConfigurationChanged(@NonNull Configuration newConfig) {
         super.onConfigurationChanged(newConfig);
         // Pass any configuration change to the drawer toggles
         drawerToggle.onConfigurationChanged(newConfig);
 
     }
     @Override
 
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
 
+        switch (item.getItemId()){
+            case android.R.id.home:
+                mDrawer.openDrawer(GravityCompat.START);
+                return true;
+
+        }
+
         if (drawerToggle.onOptionsItemSelected(item)) {
 
             return true;
 
         }
         return super.onOptionsItemSelected(item);
 
     }
+
+    @Override
+    public void onBackPressed() {
+        if (mDrawer.isDrawerOpen(GravityCompat.START))
+            mDrawer.closeDrawer(GravityCompat.START);
+        else
+            super.onBackPressed();
+    }
 }