android - ExpandableListView中的子选择

在ExpandableListView中，是否可以最初选择一个子项，以便展开包含组并将列表滚动到该子项的位置？
我以为setSelectedChild会成功，但没有任何结果。
我用以下代码进行了测试：

public class MainActivity extends Activity {

private static final String TITLE = "title";

@SuppressWarnings("serial")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ExpandableListView listView = new ExpandableListView(this);
    SimpleExpandableListAdapter adapter = new SimpleExpandableListAdapter(this,
        new ArrayList<Map<String,String>>() {
            {
                this.add(new HashMap<String, String>() {
                    {
                        this.put(TITLE, "Group 1");
                    }
                });
                this.add(new HashMap<String, String>() {
                    {
                        this.put(TITLE, "Group 2");
                    }
                });
                this.add(new HashMap<String, String>() {
                    {
                        this.put(TITLE, "Group 3");
                    }
                });
            }
        },
        android.R.layout.simple_expandable_list_item_1,
        new String[] { TITLE },
        new int[] { android.R.id.text1 },
        new ArrayList<List<? extends Map<String,String>>>() {
            {
                this.add(new ArrayList<Map<String,String>>() {
                    {
                        this.add(new HashMap<String, String>() {
                            {
                                this.put(TITLE, "Child 1-1");
                            }
                        });
                        this.add(new HashMap<String, String>() {
                            {
                                this.put(TITLE, "Child 1-2");
                            }
                        });
                    }
                });
                this.add(new ArrayList<Map<String,String>>() {
                    {
                        this.add(new HashMap<String, String>() {
                            {
                                this.put(TITLE, "Child 2-1");
                            }
                        });
                        this.add(new HashMap<String, String>() {
                            {
                                this.put(TITLE, "Child 2-2");
                            }
                        });
                    }
                });
                this.add(new ArrayList<Map<String,String>>() {
                    {
                        this.add(new HashMap<String, String>() {
                            {
                                this.put(TITLE, "Child 3-1");
                            }
                        });
                        this.add(new HashMap<String, String>() {
                            {
                                this.put(TITLE, "Child 3-2");
                            }
                        });
                    }
                });
            }
        },
        android.R.layout.simple_expandable_list_item_2,
        new String[] { TITLE },
        new int[] { android.R.id.text1 }
    );
    listView.setAdapter(adapter);
    setContentView(listView);

    listView.setSelectedChild(1, 1, true);
}
}

最佳答案

在listView.expandGroup()之前添加对setSelectedChild()的调用。
shouldExpandGroup中的setSelectedChild()参数设置为true似乎仅在至少有一个组首先展开时才起作用。