Change drawer icon back to back arrow

Question

I'm using the new DrawerLayout to have side navigation. I'm using the drawer icon (the 'hamburger') like this:

@Override protected void onStart() {     super.onStart();      mDrawerLayout = (DrawerLayout) findViewById(R.id.activity_main_drawerlayout);     mDrawerToggle = new ActionBarDrawerToggle(             this,              mDrawerLayout,              R.drawable.ic_navigation_drawer,              R.string.app_name,              R.string.app_name);     mDrawerLayout.setDrawerListener(mDrawerToggle);      getActionBar().setDisplayHomeAsUpEnabled(true);     getActionBar().setHomeButtonEnabled(true); } 

However, when I add a Fragment to the backstack, I want to display the back arrow again, so the user can navigate back to "home", and only then open the app drawer.

How can I reset the drawer icon to the back icon?
The arrow I want:

Answer 1

To disable and hide the DrawerToggle "Hamburger", just call

mDrawerToggle.setDrawerIndicatorEnabled(false);