The hamburger icon does not appear in the navigation box fragment

Question

I use Fragement for the navigation box and therefore cannot use onPostCreated to call syncState

 public class NavigationDrawerFragment extends Fragment{ .... 

Call syncState() on activityCreated

 @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // Indicate that this fragment would like to influence the set of actions in the action bar. setHasOptionsMenu(true); mDrawerToggle.syncState(); } 

Using ic_drawer for an icon

 public void setUp(int fragmentId, DrawerLayout drawerLayout) { mFragmentContainerView = getActivity().findViewById(fragmentId); mDrawerLayout = drawerLayout; // set a custom shadow that overlays the main content when the drawer opens mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); // set up the drawer list view with items and click listener ActionBar actionBar = getActionBar(); actionBar.setDisplayHomeAsUpEnabled(true); actionBar.setHomeButtonEnabled(true); // ActionBarDrawerToggle ties together the the proper interactions // between the navigation drawer and the action bar app icon. mDrawerToggle = new ActionBarDrawerToggle( getActivity(), /* host Activity */ mDrawerLayout, /* DrawerLayout object */ R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ R.string.navigation_drawer_open, /* "open drawer" description for accessibility */ R.string.navigation_drawer_close /* "close drawer" description for accessibility */ ) { @Override public void onDrawerClosed(View drawerView) { super.onDrawerClosed(drawerView); if (!isAdded()) { return; } getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu() } @Override public void onDrawerOpened(View drawerView) { super.onDrawerOpened(drawerView); if (!isAdded()) { return; } if (!mUserLearnedDrawer) { // The user manually opened the drawer; store this flag to prevent auto-showing // the navigation drawer automatically in the future. mUserLearnedDrawer = true; SharedPreferences sp = PreferenceManager .getDefaultSharedPreferences(getActivity()); sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply(); } getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu() } }; 

I can’t understand what’s wrong. Please help!

Answer 1

I also had this problem. For me, import android.support.v7.app.ActionBarDrawerToggle instead of android.support.v4.app.ActionBarDrawerToggle fixed it. You must also remove the R.drawable.ic_drawer argument when defining mDrawerToggle:

mDrawerToggle = new ActionBarDrawerToggle( getActivity(), mDrawerLayout, R.string.navigation_drawer_open, R.string.navigation_drawer_close )

If this does not work, try a few answers to this question .

Answer 2

The accepted answer did not solve it for me, I found out that I had the wrong override for onPostCreate

 @Override public void onPostCreate(Bundle savedInstanceState, PersistableBundle persistentState) { super.onPostCreate(savedInstanceState, persistentState); mDrawerToggle.syncState(); } 

It should be

 @Override public void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); mDrawerToggle.syncState(); }