[Android] AndroidX 이후 Fragment back pressed 제어(OnBackPressedCallBack) (Java)

 

 

AndroidX이후로 다음과 같이 사용 가능해짐

 

새로운 릴리스 androidx.activity 버전 1.0.0-alpha07

Android 공식 안내서에 대한 추가 설명 : 사용자 정의 뒤로 탐색 제공

public class MyFragment extends Fragment {

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // This callback will only be called when MyFragment is at least Started.
        OnBackPressedCallback callback = new OnBackPressedCallback(true /* enabled by default */) {
            @Override
            public boolean handleOnBackPressed() {
                // Handle the back button event
            }
        });
        requireActivity().getOnBackPressedDispatcher().addCallback(this, callback);

        // The callback can be enabled or disabled here or in handleOnBackPressed()
    }
    ...
}

 

 

 

 

 

Reference

https://www.it-swarm.dev/ko/android/android-%ED%83%90%EC%83%89-%EA%B5%AC%EC%84%B1-%EC%9A%94%EC%86%8C%EC%9D%98-%EB%92%A4%EB%A1%9C-%EB%8B%A8%EC%B6%94-%EC%B2%98%EB%A6%AC/806260360/