Make RecyclerView smooth scroll in a NestedScrollView

CustomLinearLayoutManager.java

public class CustomLinearLayoutManager extends LinearLayoutManager {

    public CustomLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
        super(context, orientation, reverseLayout);
    }

    // It will always pass false to RecyclerView when calling "canScrollVertically()" method.
    @Override
    public boolean canScrollVertically() {
        return false;
    }
}

MainActivity.java

CustomLinearLayoutManager customLayoutManager
                = new CustomLinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
mRecyclerView.setLayoutManager(customLayoutManager);