Navigation Drawer ActionBar button not working

Question

I am working on an android project and I'm trying to integrate the new Navigation Drawer using the example from http://developer.android.com/training/implementing-navigation/nav-drawer.html.

Its mostly working except for one thing, the action bar up button doesn't display the menu, but if I swipe my finger over the main activity screen from the edge, then the menu appears, so I know there's nothing wrong with the actual menu, its just the action bar button.

Below is the code

public class MainActivity extends Activity {      private DrawerLayout mDrawerLayout;     private ListView mDrawerList;     private ActionBarDrawerToggle mDrawerToggle;      private CharSequence mTitle;     private CharSequence mDrawerTitle;     private String[] mPlanetTitles;      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         mTitle = mDrawerTitle = getTitle();         mPlanetTitles = getResources().getStringArray(R.array.planets_array);          mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);         mDrawerList = (ListView)findViewById(R.id.left_drawer);           MenuItemAdapter menuAdapter = new MenuItemAdapter(this);          menuAdapter.add(new MenuItem("Hello"));         menuAdapter.add(new MenuItem("World"));         menuAdapter.add(new MenuItem("Parsnips"));         menuAdapter.add(new MenuItem("Turnips"));          mDrawerList.setAdapter(menuAdapter);          mDrawerList.setOnItemClickListener(new DrawerItemClickListener());          getActionBar().setDisplayHomeAsUpEnabled(true);         getActionBar().setHomeButtonEnabled(true);          mDrawerToggle = new ActionBarDrawerToggle(                 this,                 mDrawerLayout,                 R.drawable.ic_drawer,                  R.string.drawer_open,                 R.string.drawer_closed)         {             public void onDrawerClosed(View view)             {                 getActionBar().setTitle(mTitle);                 invalidateOptionsMenu();             }              public void onDrawerOpened(View drawerView)             {                 getActionBar().setTitle(mDrawerTitle);                 invalidateOptionsMenu();             }         };          mDrawerLayout.setDrawerListener(mDrawerToggle);         if (savedInstanceState ==  null)         {             selectItem(0);         }     }      @Override     public boolean onCreateOptionsMenu(Menu menu) {         // Inflate the menu; this adds items to the action bar if it is present.         getMenuInflater().inflate(R.menu.main, menu);         return true;     }      private class DrawerItemClickListener implements ListView.OnItemClickListener {         @Override         public void onItemClick(AdapterView<?> parent, View view, int position, long id) {             selectItem(position);         }     }      private void selectItem(int position) {         // update the main content by replacing fragments          android.app.Fragment fragment = new PlanetFragment();         Bundle args = new Bundle();         args.putInt(PlanetFragment.ARGS_PLANET_NUMBER, position);         fragment.setArguments(args);          android.app.FragmentManager fragmentManager = getFragmentManager();         fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();          mDrawerList.setItemChecked(position, true);         setTitle(mPlanetTitles[position]);         mDrawerLayout.closeDrawer(mDrawerList);     }      @Override     public void setTitle(CharSequence title)     {         mTitle = title;         getActionBar().setTitle(mTitle);     }      @Override     protected void onPostCreate(Bundle savedInstanceState)     {         super.onPostCreate(savedInstanceState);         mDrawerToggle.syncState();     }      @Override     public void onConfigurationChanged(Configuration newConfig)     {         super.onConfigurationChanged(newConfig);         mDrawerToggle.onConfigurationChanged(newConfig);     }      public static class PlanetFragment extends android.app.Fragment     {         public static final String ARGS_PLANET_NUMBER = "planet_number";          public PlanetFragment()         {          }          @Override         public View onCreateView(LayoutInflater inflator, ViewGroup container, Bundle savedInstanceState)         {             View rootView = inflator.inflate(R.layout.fragment_planet, container, false);             int i = getArguments().getInt(ARGS_PLANET_NUMBER);             String planet = getResources().getStringArray(R.array.planets_array)[i];              //((TextView)rootView.findViewById(R.id.fragment_text_view)).setText(planet);             getActivity().setTitle("Planet: " + planet);             return rootView;         }     }      private class MenuItem     {         public String menuName;          public MenuItem(String menuName)         {             this.menuName = menuName;         }     }      public class MenuItemAdapter extends ArrayAdapter<MenuItem>     {         public MenuItemAdapter (Context context)         {             super(context,0);         }          public View getView (int position, View convertView, ViewGroup parent)         {             convertView = null;             if (convertView == null)             {                 convertView = LayoutInflater.from(getContext()).inflate(R.layout.row_menu_item, null);             }              /*TextView title = (TextView)convertView.findViewById(R.id.row_title);             title.setText(getItem(position).menuName);             title.setVisibility(View.VISIBLE);*/              EditText title = (EditText)convertView.findViewById(R.id.row_edittext);             title.setHint(getItem(position).menuName);             title.setVisibility(View.VISIBLE);              return convertView;         }     } } 

Thanks for any help you can provide.

Answer 1

You forgot to implement onOptionsItemSelected

This is where the magic happens:

@Override     public boolean onOptionsItemSelected(MenuItem item) {         // Pass the event to ActionBarDrawerToggle, if it returns         // true, then it has handled the app icon touch event         if (mDrawerToggle.onOptionsItemSelected(item)) {           return true;         }         // Handle your other action bar items...          return super.onOptionsItemSelected(item);     }