android fragment 延迟加载数据

public abstract class LazyFragment extends Fragment {

@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if(getUserVisibleHint()) {
lazyLoad();
} else {
onInvisible();
}
}
protected abstract void lazyLoad();
protected void onInvisible(){}
}