Why doesn't my navigation drawer work in my fragment? - android-fragments

Question

I'm trying to create a navigation drawer in a fragment, but my app keeps crashing. The navigation drawer itself works fine without a drawer toggle. The problem is that when I try to add the code to create a drawer toggle, the app crashes. What am I doing wrong?
TestListFragment:
public class TestListFragment extends Fragment {
private RecyclerView testRecycler;
private String[] names;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_test_list, container, false);
Toolbar toolbar = view.findViewById(R.id.toolbar);
((AppCompatActivity)getActivity()).setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) view.findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(getActivity(), drawer, toolbar, R.string.nav_open_drawer, R.string.nav_close_drawer);
drawer.addDrawerListener(toggle);
toggle.syncState();
testRecycler = view.findViewById(R.id.test_recycler);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
testRecycler.setLayoutManager(layoutManager);
names = new String[Test.testData.length];
for(int i = 0; i < names.length; i++) {
names[i] = Test.testData[i].getTitle();
}
TestAdapter adapter = new TestAdapter(names);
testRecycler.setAdapter(adapter);
return view;
}
}
fragment_test_list:
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
layout="#layout/toolbar_main"
android:id="#+id/toolbar" />
<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/test_recycler"
android:layout_width="match_parent"
android:layout_height="match_parent">
</androidx.recyclerview.widget.RecyclerView>
</LinearLayout>
<com.google.android.material.navigation.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:menu="#menu/menu_nav" />
</androidx.drawerlayout.widget.DrawerLayout>
toolbar_main:
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar" />
menu_nav:
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/category1"
android:title="#string/category_1" />
<item
android:id="#+id/category2"
android:title="#string/category_2" />
</menu>