Disable ActionBarDrawerToggle's drawer indicator, but keep the hamburger icon

Issue

In my main activity I'm getting references to my DrawerLayout and Toolbars like this:

    //Set the toolbar
    toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    //Set navigation drawer
    drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    hamburger = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.setDrawerListener(hamburger);
    hamburger.syncState();

In one of my fragments, I want to completely disable 1) swiping to open the nav drawer and 2) the hamburger/toggle button to toggle nav drawer opening

Currently, I'm doing it like this:

mainActivity = (MainActivity)getActivity();
mainActivity.drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
mainActivity.hamburger.setDrawerIndicatorEnabled(false);
mainActivity.hamburger.syncState();

Swiping is correctly handled - it no longer opens the drawer.

The hamburger icon has completely disappeared though. Ideally, I want the hamburger icon to remain on the screen, but to just sit in a disabled state so that it doesn't do anything when clicked. Is there an alternative to setDrawerIndicatorEnabled that will work this way?

Solution

The simplest way to do this is probably to just set a DrawerArrowDrawable as the toggle's Up indicator, and enable/disable the drawer indicator as usual.

After you've initialized the ActionBarDrawerToggle, call:

hamburger.setHomeAsUpIndicator(new DrawerArrowDrawable(toolbar.getContext()));

DrawerArrowDrawable is actually what the ActionBarDrawerToggle uses for that animation, and its default state is the hamburger. When you disable the drawer indicator, it switches to the Up indicator, but that doesn't receive the drawer opening/closing calls, so it just sits in the default state. Re-enabling the drawer indicator switches back to the toggle, which does get the drawer events, so the animation is re-enabled as well.

Answered By - Mike M.