android Fragment懶加載，當頁面可見時加載數據

現在的方法目前沒有發現問題，用TabLayout+ViewPager，切換時僅當前頁加載且只加載一次。
希望大家發現問題指正。
參考自：（http://www.jianshu.com/p/7a47907f49c2）作者博客： http://www.crocutax.com

    // 保存之前的界面，否則會重新調用onCreateView
    viewPager.setOffscreenPageLimit(fragmentList.size());

fragment代碼：

public class MyFragment extends Fragment {
    private boolean isViewCreate;//view是否已創建
    private boolean isViewVisible;//fragment是否可見
    private int index;

    public static MyFragment newInstance(int index) {
        Bundle args = new Bundle();
        args.putInt("index", index);
        MyFragment fragment = new MyFragment();
        fragment.setArguments(args);
        return fragment;
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View inflate = inflater.inflate(R.layout.fragment_my, container, false);
        index = getArguments().getInt("index");
        Log.d("test", "onCreateView===================================" + index);
        ((TextView) inflate.findViewById(R.id.tv_info)).setText("fragment" + index);
        return inflate;
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        Log.d("test", "onViewCreated===================================" + index);
        isViewCreate = true;
        lazyLoad();
    }

    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);
        Log.d("test", "setUserVisibleHint===================================" + index);
        if (isVisibleToUser) {
            isViewVisible = true;
            lazyLoad();
        } else {
            isViewVisible = false;
        }
    }

    private void lazyLoad() {
        if (isViewCreate && isViewVisible) {
            Log.d("test", "lazyLoad===================================" + index);
        }
    }
}