Set a title in Toolbar from fragment in Android

Question

I have been using the latest Toolbar from AppCompatv7 lib.I have placed a textview in the ToolBar ViewGroup And I want to set a title into this Textview from the fragment in my

Answer 1

getSupportFragmentManager().addOnBackStackChangedListener(new FragmentManager.OnBackStackChangedListener() {
            @Override
            public void onBackStackChanged() {
                FragmentManager.BackStackEntry lastBackStackEntry=null;

                int lastBackStackEntryCount = getSupportFragmentManager().getBackStackEntryCount() - 1;
                if(lastBackStackEntryCount >= 0 )
                {
                    lastBackStackEntry = getSupportFragmentManager().getBackStackEntryAt(lastBackStackEntryCount);
                }
                Toast.makeText(MainActivity.this, ""+lastBackStackEntryCount, Toast.LENGTH_SHORT).show();
                if(lastBackStackEntryCount == -1)
                {
                    toolbar.setTitle("");
                    toolbar.setLogo(R.drawable.header_logo);
                }
                else
                {
                    toolbar.setTitle(lastBackStackEntry.getName());
                }
            }
        });