WIP

app/src/main/java/one/nem/lacerta/MainActivity.java

@@ -1,14 +1,29 @@
 package one.nem.lacerta;
 
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.FragmentManager;
+import androidx.navigation.NavController;
+import androidx.navigation.fragment.NavHostFragment;
+import androidx.navigation.ui.NavigationUI;
 
 import android.os.Bundle;
 
+import com.google.android.material.bottomnavigation.BottomNavigationView;
+
 public class MainActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+
+        // Debug
+        FragmentManager supportFragmentManager = getSupportFragmentManager();
+
+        NavHostFragment navHostFragment = (NavHostFragment) supportFragmentManager.findFragmentById(R.id.nav_host_fragment);
+        NavController navController = navHostFragment.getNavController();
+        BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_nav);
+
+        NavigationUI.setupWithNavController(bottomNavigationView, navController);
     }
 }

app/src/main/res/layout/activity_main.xml

@@ -15,7 +15,7 @@
         app:layout_constraintStart_toStartOf="parent" />
 
     <androidx.fragment.app.FragmentContainerView
-        android:id="@+id/fragmentContainerView"
+        android:id="@+id/nav_host_fragment"
         android:name="androidx.navigation.fragment.NavHostFragment"
         android:layout_width="409dp"
         android:layout_height="649dp"

app/src/main/res/menu/bottom_nav_menu.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@id/feature_debug_navigation"
+        android:title="DebugMenu"/>
+
+
+</menu>