Extends BaseExpandableListAdapter

MainActivity.java

package test.civic;

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

import test.civic.AKB48.Member;
import android.app.Activity;
import android.os.Bundle;
import android.text.Html;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		/*
		 * BaseExpandableListAdapterを継承した、AKB48データ用のAdapterを作成
		 */
		BaseExpandableListAdapter adapter = new BaseExpandableListAdapter() {
			// とりあえずチームごとに振り分け
			HashMap<String, List<Member>> teamMembersMap = new LinkedHashMap<String, List<Member>>();
			List<String> teamList = new ArrayList<String>();
			{
				//データソースのAKB48から、アダプタで使いやすいように加工
				// teamMembers: チーム名->メンバーのリスト
				for (Member member : AKB48.getAkb48Raw()) {
					String teamName = member.team;
					List<Member> team = teamMembersMap.get(teamName);
					if (team == null) {
						team = new ArrayList<Member>();
					}
					team.add(member);
					teamMembersMap.put(teamName, team);
				}
				//出現順を維持したチーム名のリスト
				teamList.addAll(teamMembersMap.keySet());
			}
			@Override
			public boolean isChildSelectable(int groupPosition,
					int childPosition) {
				return true;
			}

			@Override
			public boolean hasStableIds() {
				return true;
			}

			@Override
			public View getGroupView(int groupPosition, boolean isExpanded,
					View convertView, ViewGroup parent) {

				TextView label;
				if (convertView == null) {
					label = new TextView(parent.getContext());
					label.setHeight(80);
					label.setTextSize(32f);
					label.setPadding(60, 10, 0, 0);
					convertView = label;
				} else {
					label = (TextView) convertView;
				}
				label.setText(teamList.get(groupPosition));
				return label;
			}

			@Override
			public long getGroupId(int groupPosition) {
				return (long) groupPosition; // position不変なのでIDと同一とする
			}

			@Override
			public int getGroupCount() {
				return teamList.size();
			}

			@Override
			public Object getGroup(int groupPosition) {
				return teamList.get(groupPosition);
			}

			@Override
			public int getChildrenCount(int groupPosition) {
				String team = teamList.get(groupPosition);
				List<Member> list = teamMembersMap.get(team);
				return list.size();
			}

			@Override
			public View getChildView(int groupPosition, int childPosition,
					boolean isLastChild, View convertView, ViewGroup parent) {

				TextView label;
				if (convertView == null) {
					label = new TextView(parent.getContext());
					label.setHeight(90);
					label.setTextSize(24f);
					label.setPadding(80, 0, 0, 0);
					convertView = label;
				} else {
					label = (TextView) convertView;
				}
				String team = teamList.get(groupPosition);
				Member member = teamMembersMap.get(team).get(childPosition);
				label.setText(Html.fromHtml(member.name + "<br/><small>" + member.nickName + "</small>"));
				return label;
			}

			@Override
			public long getChildId(int groupPosition, int childPosition) {
				return (long) (groupPosition * 100 + childPosition);	//普遍データとして適当に生成
			}

			@Override
			public Object getChild(int groupPosition, int childPosition) {
				String team = teamList.get(groupPosition);
				Member member = teamMembersMap.get(team).get(childPosition);
				return member;
			}
		};

		// インスタンス作成
		ExpandableListView elvAkb48 = (ExpandableListView) findViewById(R.id.elv_akb48);

		// Adapter登録
		elvAkb48.setAdapter(adapter);

		// =====とりあえずここまでで表示は出来ます=====

		// メンバー部分のタップについてListener登録
		elvAkb48.setOnChildClickListener(new OnChildClickListener() {

			@Override
			public boolean onChildClick(ExpandableListView parent, View v,
					int groupPosition, int childPosition, long id) {

				// Adapterをもらってくる
				ExpandableListAdapter adapter = parent.getExpandableListAdapter();
				
				// メンバー表示用データ作成時に作ったブツがもらえます
				Member member  = (Member)adapter.getChild(groupPosition, childPosition);
				
				// 表示に使わなかったbirthday要素も表示できます☆-(ノﾟДﾟ)八(ﾟДﾟ )ノｲｴｰｲ
				Toast.makeText(MainActivity.this, member.birthDay, Toast.LENGTH_SHORT).show();				
				return false;
			}
		});
	}

}