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MVVM_practice

Android Architecture Component(AAC) - ViewModel + LiveData + DataBinding
안드로이드 컴퍼넌트를 이용하여 MVVM 디자인패턴을 연습 해 보는 레포지토리

목적

  • 액티비티.프레그먼트의 LifeCycle 관리를 쉽게 할 수 있음. -> 관리가 힘들고 메모리 누수 발생가능 하다는 단점 보완
  • UI 에 데이터를 뿌려줌

라이브데이터

  • 데이터가 변경 되었을 때, noti를 받아 UI를 자동으로 갱신 할 수 있도록 함. (데이터바인딩에서 옵져버블 필드를 만들어 사용 할 수도 있지만 어려움..)
  • 라이브데이터를 쓰면 관찰 가능한 데이터로 만들 수 있음
    • 뮤터블라이브데이터 => 수정이 가능한 경우
    • 라이브데이터 => 데이터를 set할 필요가 없을 경우

뷰모델

  • UI에 관계가 있는 데이터를 저장하는 용도
  • 뷰모델은 액티비티가 소멸 될 때 생명주기 소멸된다는 특징이 있음!

Room

  • sqlLigjht를 대체하는 내부디비.

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