如何应该是组织了SimpleExpandableListAdapter数据 [英] How should be the data for a SimpleExpandableListAdapter organized

问题描述

我想创建一个 ExpandableListView 与 SimpleExpandableListAdapter （我知道我可以扩展新的适配器自己，但我想尝试simpleExapndableListAdapter）。

I am trying to create a ExpandableListView with the SimpleExpandableListAdapter(I know I can extend a new adapter myself, but I want to try the simpleExapndableListAdapter).

现在我遇到问题时，我尝试创建一个新的实例 SimpleExpandableListAdapter 。

Now I meet problems when I try to create a new instance of SimpleExpandableListAdapter.

事件我读<一href="http://developer.android.com/reference/android/widget/SimpleExpandableListAdapter.html#SimpleExpandableListAdapter%28android.content.Context,%20java.util.List%3C?%20extends%20java.util.Map%3Cjava.lang.String,%20?%3E%3E,%20int,%20java.lang.String%5B%5D,%20int%5B%5D,%20java.util.List%3C?%20extends%20java.util.List%3C?%20extends%20java.util.Map%3Cjava.lang.String,%20?%3E%3E%3E,%20int,%20java.lang.String%5B%5D,%20int%5B%5D%29">references,我不是很确定什么是参数的含义尤其是 groupData 和 childData 。

Event I read the references, I am not exactly sure what does the parameters mean especially the groupData and the childData.

虽然我知道我要创建地图列表和清单地图列表，但什么数据应放在那里？如何组织他们？

Though I know I have to create a list of Map and a list of list of Map, but what data should be put there? How to organized them?

例如，这是我要显示的数据，如何组织他们？

For example, this is the data I want to display, how to organize them?

++Development Team
  John
  Bill
++Data Process Team
  Alice
  David

顺便说一句，这是否意味着我要创建两个布局组和子视图？

BTW, does it mean that I have to create two layout for the group and the child view?

我用Google搜索，并一次又一次地阅读教程，但我无法理解。

I have googled and read the tutorial again and again, but I can not understand it.

我希望有人可以给马一个解释。

I hope someone can give ma an explain.

推荐答案

下面是你想要的，它会清除所有的疑虑简单的示例。

Here is simple sample you wanted, it will clear all your doubts..

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.ExpandableListActivity;
import android.os.Bundle;
import android.widget.ExpandableListAdapter;
import android.widget.SimpleExpandableListAdapter;

public class SimpleExpandableListExampleActivity extends ExpandableListActivity {
    private static final String NAME = "NAME";

    private ExpandableListAdapter mAdapter;

    private String group[] = {"Development" , "Data Process Team"};
    private String[][] child = { { "John", "Bill" }, { "Alice", "David" } };

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

        List<Map<String, String>> groupData = new ArrayList<Map<String, String>>();
        List<List<Map<String, String>>> childData = new ArrayList<List<Map<String, String>>>();
        for (int i = 0; i < group.length; i++) {
            Map<String, String> curGroupMap = new HashMap<String, String>();
            groupData.add(curGroupMap);
            curGroupMap.put(NAME, group[i]);

            List<Map<String, String>> children = new ArrayList<Map<String, String>>();
            for (int j = 0; j < child[i].length; j++) {
                Map<String, String> curChildMap = new HashMap<String, String>();
                children.add(curChildMap);
                curChildMap.put(NAME, child[i][j]);
            }
            childData.add(children);
        }

        // Set up our adapter
        mAdapter = new SimpleExpandableListAdapter(this, groupData,
                android.R.layout.simple_expandable_list_item_1,
                new String[] { NAME }, new int[] { android.R.id.text1 },
                childData, android.R.layout.simple_expandable_list_item_2,
                new String[] { NAME }, new int[] { android.R.id.text1 });
        setListAdapter(mAdapter);
    }

}

所有你需要做的就是

All you have to do is

• 创建与 SimpleExpandableListExampleActivity 作为Android项目 您的主要活动。
• 复制 - 粘贴在该活动中给出的code。
• 在那呢..运行您的code ...

• Create an Android project with SimpleExpandableListExampleActivity as your main activity..
• Copy-paste the code given in that activity.
• Thats it.. Run your code...

希望这有助于...

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