title: Add section to navigation drawer
body: <p>i have the below code : </p>
  
  <p>activity.xml</p>
  
  <pre><code>&lt;android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/drawer_layout"
      android:layout_width="match_parent"
      android:layout_height="match_parent" &gt;
  
      &lt;!-- Framelayout to display Fragments --&gt;
  
      &lt;FrameLayout
          android:id="@+id/frame_container"
          android:layout_width="match_parent"
          android:layout_height="match_parent" /&gt;
      &lt;!-- Listview to display slider menu --&gt;
  
      &lt;ListView
          android:id="@+id/list_slidermenu"
          android:layout_width="240dp"
          android:layout_height="match_parent"
          android:layout_gravity="start"
          android:background="@color/list_background"
          android:choiceMode="singleChoice"
          android:divider="@color/list_divider"
          android:dividerHeight="1dp"
          android:listSelector="@drawable/list_selector" /&gt;
  
  &lt;/android.support.v4.widget.DrawerLayout&gt;
  </code></pre>
  
  <p>MainActivity.java</p>
  
  <pre><code>public class MainActivity extends Activity {
      private DrawerLayout mDrawerLayout;
      private ListView mDrawerList;
      private ActionBarDrawerToggle mDrawerToggle;
  
      // nav drawer title
      private CharSequence mDrawerTitle;
  
      // used to store app title
      private CharSequence mTitle;
  
      // slide menu items
      private String[] navMenuTitles;
      private TypedArray navMenuIcons;
  
      private ArrayList&lt;NavDrawerItem&gt; navDrawerItems;
      private NavDrawerListAdapter adapter;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          mTitle = mDrawerTitle = getTitle();
  
          // load slide menu items
          navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
  
          // nav drawer icons from resources
          navMenuIcons = getResources()
                  .obtainTypedArray(R.array.nav_drawer_icons);
  
          mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
          mDrawerList = (ListView) findViewById(R.id.list_slidermenu);
  
          navDrawerItems = new ArrayList&lt;NavDrawerItem&gt;();
  
          // adding nav drawer items to array
          // Home
          navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons
                  .getResourceId(0, -1)));
          // Find People
          navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons
                  .getResourceId(1, -1)));
          // Photos
          navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons
                  .getResourceId(2, -1)));
          // Communities, Will add a counter here
          navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons
                  .getResourceId(3, -1), true, "22"));
          // Pages
          navDrawerItems.add(new NavDrawerItem(navMenuTitles[4], navMenuIcons
                  .getResourceId(4, -1)));
          // What's hot, We will add a counter here
          navDrawerItems.add(new NavDrawerItem(navMenuTitles[5], navMenuIcons
                  .getResourceId(5, -1), true, "50+"));
  
          // Recycle the typed array
          navMenuIcons.recycle();
  
          mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
  
          // setting the nav drawer list adapter
          adapter = new NavDrawerListAdapter(getApplicationContext(),
                  navDrawerItems);
          mDrawerList.setAdapter(adapter);
  
          // enabling action bar app icon and behaving it as toggle button
          getActionBar().setDisplayHomeAsUpEnabled(true);
          getActionBar().setHomeButtonEnabled(true);
  
          mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
                  R.drawable.ic_drawer, // nav menu toggle icon
                  R.string.app_name, // nav drawer open - description for
                                      // accessibility
                  R.string.app_name // nav drawer close - description for
                                      // accessibility
          ) {
              public void onDrawerClosed(View view) {
                  getActionBar().setTitle(mTitle);
                  // calling onPrepareOptionsMenu() to show action bar icons
                  invalidateOptionsMenu();
              }
  
              public void onDrawerOpened(View drawerView) {
                  getActionBar().setTitle(mDrawerTitle);
                  // calling onPrepareOptionsMenu() to hide action bar icons
                  invalidateOptionsMenu();
              }
          };
          mDrawerLayout.setDrawerListener(mDrawerToggle);
  
          if (savedInstanceState == null) {
              // on first time display view for first nav item
              displayView(0);
          }
      }
  
      /**
       * Slide menu item click listener
       * */
      private class SlideMenuClickListener implements
              ListView.OnItemClickListener {
          @Override
          public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position,
                  long id) {
              // display view for selected nav drawer item
              displayView(position);
          }
      }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
          getMenuInflater().inflate(R.menu.main, menu);
          return true;
      }
  
      @Override
      public boolean onOptionsItemSelected(MenuItem item) {
          // toggle nav drawer on selecting action bar app icon/title
          if (mDrawerToggle.onOptionsItemSelected(item)) {
              return true;
          }
          // Handle action bar actions click
          switch (item.getItemId()) {
          case R.id.action_settings:
              return true;
          default:
              return super.onOptionsItemSelected(item);
          }
      }
  
      /* *
       * Called when invalidateOptionsMenu() is triggered
       */
      @Override
      public boolean onPrepareOptionsMenu(Menu menu) {
          // if nav drawer is opened, hide the action items
          boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
          menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
          return super.onPrepareOptionsMenu(menu);
      }
  
      /**
       * Diplaying fragment view for selected nav drawer list item
       * */
      private void displayView(int position) {
          // update the main content by replacing fragments
          Fragment fragment = null;
          switch (position) {
          case 0:
  
              fragment = new HomeFragment();
              break;
  
          case 1:
              fragment = new FindPeopleFragment();
              break;
          case 2:
              fragment = new PhotosFragment();
              break;
          case 3:
              fragment = new CommunityFragment();
              break;
          case 4:
              fragment = new PagesFragment();
              break;
          case 5:
              fragment = new WhatsHotFragment();
              break;
  
          default:
              break;
          }
  
          if (fragment != null) {
              FragmentManager fragmentManager = getFragmentManager();
              fragmentManager.beginTransaction()
                      .replace(R.id.frame_container, fragment).commit();
  
              // update selected item and title, then close the drawer
              mDrawerList.setItemChecked(position, true);
              mDrawerList.setSelection(position);
              setTitle(navMenuTitles[position]);
              mDrawerLayout.closeDrawer(mDrawerList);
          } else {
              // error in creating fragment
              Log.e("MainActivity", "Error in creating fragment");
          }
      }
  
      @Override
      public void setTitle(CharSequence title) {
          mTitle = title;
          getActionBar().setTitle(mTitle);
      }
  
      /**
       * When using the ActionBarDrawerToggle, you must call it during
       * onPostCreate() and onConfigurationChanged()...
       */
  
      @Override
      protected void onPostCreate(Bundle savedInstanceState) {
          super.onPostCreate(savedInstanceState);
          // Sync the toggle state after onRestoreInstanceState has occurred.
          mDrawerToggle.syncState();
      }
  
      @Override
      public void onConfigurationChanged(Configuration newConfig) {
          super.onConfigurationChanged(newConfig);
          // Pass any configuration change to the drawer toggls
          mDrawerToggle.onConfigurationChanged(newConfig);
      }
  
  }
  </code></pre>
  
  <p>and for the section i have the below xml :</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:background="#FFF" &gt;
  
      &lt;TextView
          android:id="@+id/navmenusection_label"
          style="?android:attr/listSeparatorTextViewStyle"
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:background="#BBB"
          android:paddingBottom="7dp"
          android:paddingTop="7dp"
          android:text="Section"
          android:textColor="#FFFFFF"
          android:textSize="18sp" /&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>So how can i add the section in the navigation drawer. ?
  i have change the NavDrawerListAdapter.java file :</p>
  
  <pre><code>public class NavDrawerListAdapter extends BaseAdapter {
  
      private Context context;
      private ArrayList&lt;NavDrawerItem&gt; navDrawerItems;
  
      public NavDrawerListAdapter(Context context,
              ArrayList&lt;NavDrawerItem&gt; navDrawerItems) {
          this.context = context;
          this.navDrawerItems = navDrawerItems;
      }
  
      @Override
      public int getCount() {
          return navDrawerItems.size();
      }
  
      @Override
      public Object getItem(int position) {
          return navDrawerItems.get(position);
      }
  
      @Override
      public long getItemId(int position) {
          return position;
      }
  
      @Override
      public View getView(int position, View convertView, ViewGroup parent) {
          if (convertView == null) {
              LayoutInflater mInflater = (LayoutInflater) context
                      .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
              convertView = mInflater.inflate(R.layout.drawer_list_item, null);
              /*
               * convertView = mInflater.inflate(R.layout.navdrawer_section,
               * parent, false);
               */
          }
  
          ImageView imgIcon = (ImageView) convertView.findViewById(R.id.icon);
          TextView txtTitle = (TextView) convertView.findViewById(R.id.title);
          TextView txtCount = (TextView) convertView.findViewById(R.id.counter);
  
          imgIcon.setImageResource(navDrawerItems.get(position).getIcon());
          txtTitle.setText(navDrawerItems.get(position).getTitle());
  
          // displaying count
          // check whether it set visible or not
          if (navDrawerItems.get(position).getCounterVisibility()) {
              txtCount.setText(navDrawerItems.get(position).getCount());
          } else {
              // hide the counter view
              txtCount.setVisibility(View.GONE);
          }
  
          return convertView;
      }
  
  }
  </code></pre>
  
  <p><code>convertView = mInflater.inflate(R.layout.navdrawer_section,
                      parent, false);</code></p>
  
  <p>i have put this in <code>getView()</code> but i am getting the error . </p>
  
  <p>Logcat :</p>
  
  <pre><code> FATAL EXCEPTION: main
   Process: com.novumlogic.euphoria, PID: 26846
   java.lang.NullPointerException
      at com.novumlogic.euphoria.adapter.NavDrawerListAdapter.getView(NavDrawerListAdapter.java:59)
      at android.widget.AbsListView.obtainView(AbsListView.java:2338)
      at android.widget.ListView.makeAndAddView(ListView.java:1812)
      at android.widget.ListView.fillDown(ListView.java:698)
      at android.widget.ListView.fillFromTop(ListView.java:759)
      at android.widget.ListView.layoutChildren(ListView.java:1631)
      at android.widget.AbsListView.onLayout(AbsListView.java:2149)
      at android.view.View.layout(View.java:15125)
      at android.view.ViewGroup.layout(ViewGroup.java:4862)
      at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:702)
      at android.view.View.layout(View.java:15125)
      at android.view.ViewGroup.layout(ViewGroup.java:4862)
      at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
      at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
      at android.view.View.layout(View.java:15125)
      at android.view.ViewGroup.layout(ViewGroup.java:4862)
      at com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:374)
      at android.view.View.layout(View.java:15125)
      at android.view.ViewGroup.layout(ViewGroup.java:4862)
      at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
      at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
      at android.view.View.layout(View.java:15125)
      at android.view.ViewGroup.layout(ViewGroup.java:4862)
      at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2317)
      at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2023)
      at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1189)
      at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6223)
      at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788)
      at android.view.Choreographer.doCallbacks(Choreographer.java:591)
      at android.view.Choreographer.doFrame(Choreographer.java:560)
      at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:774)
      at android.os.Handler.handleCallback(Handler.java:808)
      at android.os.Handler.dispatchMessage(Handler.java:103)
      at android.os.Looper.loop(Looper.java:193)
      at android.app.ActivityThread.main(ActivityThread.java:5333)
      at java.lang.reflect.Method.invokeNative(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:515)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
      at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>how can i add the section ?</p>