'Navigation Drawer Custom Action bar [ Icon ] problem?

My custom navigation drawer is working properly but as mentioned in the solved answer but I am confused about this line of code

Problem !
Press the back button to cress the app

It would be my pleasure if you help me

mNavigationDrawerFragment=(NavigationDrawerFragment)getFragmentManager().findFragmentById(R.id.navigation_drawer);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mNavigationDrawerFragment.setUp(R.id.navigation_drawer, mDrawerLayout);

Full code here



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