there are loads of tutorials online about how to use fragments with navigation drawers, but I want to know how to open navigation drawers with it. As in if you select any individual option of a navigation drawer, it'll take you to another activity with the same option of a navigation drawer within the activity.
MainActivity.java
package com.example.fyptrial3;
import android.content.Intent;
import android.os.Bundle;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import android.view.MenuItem;
import android.view.View;
import androidx.annotation.NonNull;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import com.google.android.material.navigation.NavigationView;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import android.view.Menu;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
    private DrawerLayout drawer;
    EditText etUsername, etPassword;
    public void OnLogin(View view) {
        String username = etUsername.getText().toString();
        String password = etPassword.getText().toString();
        String type = "login";
        BackgroundWorker backgroundWorker = new BackgroundWorker(this);
        backgroundWorker.execute(type, username, password);
    }
    private AppBarConfiguration mAppBarConfiguration;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        etUsername = (EditText) findViewById(R.id.etUsername);
        etPassword = (EditText) findViewById(R.id.etPassword);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        final DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_home, R.id.nav_gallery, R.id.nav_map,
                R.id.nav_news, R.id.nav_share, R.id.nav_login)
                .setDrawerLayout(drawer)
                .build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);
        navigationView.bringToFront();
        navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
                switch (menuItem.getItemId()) {
                    case R.id.nav_home:
                        Toast.makeText(getApplicationContext(), "Home is selected", Toast.LENGTH_LONG).show();
                        break;
                    case R.id.nav_gallery:
                        Toast.makeText(getApplicationContext(), "Members are selected",Toast.LENGTH_LONG).show();
                       Intent memberstart=new Intent(MainActivity.this,GalleryActivity.class);
                        startActivity(memberstart);
                        break;
                    case R.id.nav_map:
                        Toast.makeText(getApplicationContext(), "Slideshow is selected", Toast.LENGTH_LONG).show();
                        break;
                    case R.id.nav_share:
                        Toast.makeText(getApplicationContext(), "Share is selected", Toast.LENGTH_LONG).show();
                        //Intent sharestart=new Intent(MainActivity.this,this.class);
                       // startActivity(sharestart);
                        break;
                }
                drawer.closeDrawers();
                return false;
            }
        });
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    //youtube.com/watch?v=zwabHRv2taA
    //In order to change it to Irish, I used this button to show that when it is clicked
    //the version of the Navigation Drawer as Gaeilge will pop up
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if(item.getItemId() ==R.id.main_settings) {
            Intent gaeilgemainstart=new Intent(MainActivity.this,MainActivityGaeilge.class);
            startActivity(gaeilgemainstart);
        }
        return super.onOptionsItemSelected(item);
    }
    @Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }
}
 
     
     
    