Hamburger menu spin to arrow on new activity

Question

I\'ve noticed that with the more recent Gmail updates for Android, when you click on one of your emails, a new Activity opens (I\'m assuming it\'s not a fragment because of the

Answer 1

It too late but i put it here for upcoming questions. Gmail app opens email in a fragment.Cause you can still use hamburger menu in this page.Changing hamburger menu icon to back button i use this code and it works fine.

  public void setupToolbarNavigation() {
    toggle.setDrawerIndicatorEnabled(false);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);
    toggle.setToolbarNavigationClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            onBackPressed();
            reverseToolbar();


        }
    });
}

 public void reverseToolbar() {
    getSupportActionBar().setDisplayHomeAsUpEnabled(false);
    getSupportActionBar().setHomeButtonEnabled(false);
    toggle.setDrawerIndicatorEnabled(true);
    toggle.setToolbarNavigationClickListener(null);
}

toggle is instance of ActionBarDrawerToggle which you can initiate it with this code in your activity

toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();

reverseToolbar change toolbar back icon to hamburger menu icon when user clicked.Declare this method in your activity and for replacing icon in fragment put this code to your fragment. ((YourActivity)getActivity()).setupToolbarNavigation