package org.love2d.android; import android.os.Bundle; import com.google.android.material.snackbar.Snackbar; import androidx.appcompat.app.AppCompatActivity; import android.view.View; import androidx.navigation.NavController; import androidx.navigation.Navigation; import androidx.navigation.ui.AppBarConfiguration; import androidx.navigation.ui.NavigationUI; import org.love2d.android.databinding.ActivityMainBinding; public class MainActivity extends AppCompatActivity { private AppBarConfiguration appBarConfiguration; private ActivityMainBinding binding; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); binding = ActivityMainBinding.inflate(getLayoutInflater()); setContentView(binding.getRoot()); setSupportActionBar(binding.toolbar); NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main); appBarConfiguration = new AppBarConfiguration.Builder(navController.getGraph()).build(); NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration); binding.fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } }); } @Override public boolean onSupportNavigateUp() { NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main); return NavigationUI.navigateUp(navController, appBarConfiguration) || super.onSupportNavigateUp(); } }