Question

希望是一个快速的问题。我将如何在ListFragment上设置默认选择。我希望活动在已经选择的顶部列表项的情况下启动。感谢

Answer 1

取自Android文档（http://developer.android.com/guide/components/fragments.html#Example）和支持库API演示中的官方示例：

该示例中的ListFragment使用ListFragment的getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);方法中的getListView().setItemChecked(index, true);和onActivityCreated来选择/突出显示列表项，其中index取自局部变量默认设置为0。所以你有类似的东西：

public static class TitlesFragment extends ListFragment {
    boolean mDualPane;
    int mCurCheckPosition = 0;

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        // Populate list with our static array of titles.
        // (Replace this with your own list adapter stuff
        setListAdapter(new ArrayAdapter<String>(getActivity(),
            android.R.layout.simple_list_item_activated_1, Shakespeare.TITLES));

        if (savedInstanceState != null) {
            // Restore last state for checked position.
            mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
        }

        getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        getListView().setItemChecked(mCurCheckPosition, true);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt("curChoice", mCurCheckPosition);
    }

    // ... the rest of the ListFragment code ....
}

看一下我在顶部链接的那个例子，这应该可以让你开始运行！

ListFragment设置初始选择

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