title: Can't add navigation icon to activity
body: <pre><code>    public void setContentView(int layoutResID)
      {
          DrawerLayout fullView = (DrawerLayout) getLayoutInflater().inflate(R.layout.activity_base, null);
          FrameLayout activityContainer = (FrameLayout) fullView.findViewById(R.id.activity_content);
          getLayoutInflater().inflate(layoutResID, activityContainer, true);
          super.setContentView(fullView);
          Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
          setSupportActionBar(toolbar);
          final ActionBar actionBar = getSupportActionBar();
  
          if (actionBar != null)
          {
              actionBar.setDisplayHomeAsUpEnabled(true);
              mDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close)
              {
  
                  public void onDrawerClosed(View view)
                  {
                      supportInvalidateOptionsMenu();
                      //drawerOpened = false;
                  }
  
                  public void onDrawerOpened(View drawerView)
                  {
                      supportInvalidateOptionsMenu();
                      //drawerOpened = true;
                  }
              };
              mDrawerToggle.setDrawerIndicatorEnabled(true);
              drawerLayout.setDrawerListener(mDrawerToggle);
              mDrawerToggle.syncState();
          }
      }
  }
  </code></pre>
  
  <p>I want to add navigation drawer icon to this navigation drawer activity. now i have edited code but still now error app stops at startup</p>