BaseFragment for android

BaseFragment.kt

import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.content.ContextCompat;
import androidx.core.view.ViewCompat;
import androidx.fragment.app.Fragment;
import androidx.transition.TransitionInflater;

import .MainActivity;

import java.util.concurrent.TimeUnit;

import static android.view.View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
import static android.view.View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
import static android.view.View.SYSTEM_UI_FLAG_LAYOUT_STABLE;

public abstract class BaseFragment extends Fragment {

    protected MainActivity activity;

    @Override
    public void onAttach(@NonNull Context context) {
        super.onAttach(context);
        activity = (MainActivity) context;
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            view.setSystemUiVisibility(
                    SYSTEM_UI_FLAG_LAYOUT_STABLE |
                            SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
                            SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
        }
        ViewCompat.setOnApplyWindowInsetsListener(view, (v, insets) -> {
            view.setPadding(0, 0 ,0,0);
            return insets;
        });
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        activity.updateStatusBarColor(ContextCompat.getColor(activity, android.R.color.transparent));
        activity.bottomNavVisibility(bottomNavigationVisibility());
        return inflater.inflate(layoutResId(), container, false);
    }

    public abstract int bottomNavigationVisibility();

    public abstract int layoutResId();

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setSharedElementEnterTransition(TransitionInflater.from(activity).inflateTransition(android.R.transition.move));
        setSharedElementReturnTransition(TransitionInflater.from(activity).inflateTransition(android.R.transition.move));
        postponeEnterTransition(200, TimeUnit.MILLISECONDS);
    }
}