<aside> 🦜 DATA BINDING 끄적거림

</aside>

<aside> 🥨 https://developer.android.com/jetpack/androidx/releases/databinding https://0391kjy.tistory.com/28

</aside>

1. gradle에 추가

   > **build.gradle ( Module : app)**
   
   buildFeatures {
       dataBinding true
   }
   

2. xml

   • <layout></layout>으로 감싸기
   • <layout> 바로 밑에<data></data> 추가하기
   • code

3. Activity 에서 엮기

   **데이터 바인딩 적용 전** 
   
   class MainActivity : AppCompatActivity() {
       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
           setContentView(R.layout.activity_main)
           initNavigation()
       }
       private fun initNavigation(){
           val bottomNav = findViewById<BottomNavigationView>(R.id.bottom_navigation)
           val navController = Navigation.findNavController(this,R.id.nav_host_fragment)
           bottomNav.setupWithNavController(navController)
           bottomNav.itemIconTintList = null
       }
   }
   

   **데이터 바인딩 적용 후**
   
   class MainActivity : AppCompatActivity() {
       private lateinit var binding :ActivityMainBinding
       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
           initBinding()
           initNavigation()
       }
       private fun initBinding(){
           binding = DataBindingUtil.setContentView(this,R.layout.activity_main)
           binding.lifecycleOwner=this
       }
       private fun initNavigation(){
           val bottomNav = findViewById<BottomNavigationView>(R.id.bottom_navigation)
           val navController = Navigation.findNavController(this,R.id.nav_host_fragment)
           bottomNav.setupWithNavController(navController)
           bottomNav.itemIconTintList = null
       }
   }
   

   Fragment

   **데이터 바인딩 적용 전**
   
   class HomeFragment : Fragment() {
   
       override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
       ): View? {
           return super.onCreateView(inflater, container, savedInstanceState)
       }
   }
   

   **데이터 바인딩 적용 후**
   
   class HomeFragment : Fragment() {
       override fun onCreateView(
           inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
       ): View? {
           val binding = FragmentHomeBinding.inflate(inflater, container, false)
           return binding.root
       }
   }