[feat] #8 현재 fragment에 따른 바텀 네비게이션 visibility 설정

app/src/main/java/org/sopt/kream/presentation/ui/main/MainActivity.kt

@@ -1,6 +1,28 @@
 package org.sopt.kream.presentation.ui.main
 
+import android.os.Bundle
+import android.view.View
+import androidx.navigation.NavController
+import androidx.navigation.fragment.NavHostFragment
+import androidx.navigation.fragment.findNavController
+import org.sopt.kream.R
 import org.sopt.kream.databinding.ActivityMainBinding
 import org.sopt.kream.util.base.BindingActivity
 
-class MainActivity : BindingActivity<ActivityMainBinding>({ ActivityMainBinding.inflate(it) })
+class MainActivity : BindingActivity<ActivityMainBinding>({ ActivityMainBinding.inflate(it) }) {
+    private lateinit var navController: NavController
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val navHostFragment = supportFragmentManager.findFragmentById(R.id.fcv_main) as NavHostFragment
+        navController = navHostFragment.findNavController()
+
+        navController.addOnDestinationChangedListener { _, destination, _ ->
+            if (destination.id == R.id.recommend_fragment || destination.id == R.id.release_fragment) {
+                binding.bnvMain.visibility = View.VISIBLE
+            } else if (destination.id == R.id.search_fragment || destination.id == R.id.product_detail_fragment) {
+                binding.bnvMain.visibility = View.GONE
+            }
+        }
+    }
+}