Fragment 的 onSaveInstanceState() 永远不会被调用 [英] Fragment's onSaveInstanceState() is never called

问题描述

我正在尝试将数据保存在 Fragment 的 onSaveInstanceState() 中，但从未调用过该方法.

I'm trying to save data in a Fragment's onSaveInstanceState(), but the method is never called.

有人可以帮忙吗?

public class MyFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ScrollView content = (ScrollView) inflater.inflate(R.layout.content, container, false);
        // More stuff
        return content;
    }

    @Override
    public void onSaveInstanceState(Bundle icicle) {
        // NEVER CALLED
        super.onSaveInstanceState(icicle);
        //More stuff
    }

}

推荐答案

我终于找到了问题所在，至少在我的情况下是这样.我的 FragmentActivity 中有一个被覆盖的 onSaveInstanceState，它没有调用 super.onSaveInstanceState(Bundle outState).一旦我添加了它，Fragment.onSaveInstanceState(Bundle outState) 就正常运行了.

I finally figured out the problem, at least in my case. I had an overridden onSaveInstanceState in my FragmentActivity that did not call super.onSaveInstanceState(Bundle outState). Once I added that in, the Fragment.onSaveInstanceState(Bundle outState) functioned normally.

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