Общий Navigation Drawer для нескольких окон

import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
 
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
 
    private ActionBarDrawerToggle toggle;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.btn).setOnClickListener(this);
 
        final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
 
        initDrawer(toolbar);
    }
 
    private void initDrawer(Toolbar toolbar) {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        toggle = new ActionBarDrawerToggle(this, drawer, toolbar, android.R.string.ok, android.R.string.ok);
        toggle.setToolbarNavigationClickListener(toggleListener);
        toggle.syncState();
    }
 
    @Override
    public void onClick(View view) {
        getSupportFragmentManager().beginTransaction().add(R.id.container, new BlankFragment()).addToBackStack(null).commit();
        toggle.setDrawerIndicatorEnabled(false);
    }
 
    private final View.OnClickListener toggleListener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            getSupportFragmentManager().popBackStack();
            if (getSupportActionBar() != null) {
                getSupportActionBar().setDisplayHomeAsUpEnabled(false);
            }
            toggle.setDrawerIndicatorEnabled(true);
        }
    };
}

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
 
public class BlankFragment extends Fragment {
 
    public BlankFragment() {
    }
 
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle b) {
        View view = inflater.inflate(R.layout.fragment_blank, container, false);
        //
        showBackArrow();
        return view;
    }
 
    private void showBackArrow() {
        AppCompatActivity activity = (AppCompatActivity) getActivity();
        if (activity != null) {
            ActionBar actionBar = activity.getSupportActionBar();
            if (actionBar != null) actionBar.setDisplayHomeAsUpEnabled(true);
        }
    }
}