3.29

ViewPager2中切换不同fragment，对应导航栏新增日记、个人中心及日记列表。

public class DiariesFragment extends Fragment {
    private DiariesController mController;
    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mController = new DiariesController(this);
    }
    
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View root = inflater.inflate(R.layout.fragment_diaries, container, false);
        mController.setDiariesList(root.findViewById(R.id.diaries_list));
        return root;
    }

    @Override
    public void onResume() {
        super.onResume();
        mController.loadDiaries();
    }
}