ExpandableListView

KHExpandableListAdapter.java

public class KHExpandableListAdapter extends BaseExpandableListAdapter {


	private List<Map<String, Object>> groups;

	private List<List<Map<String, Object>>> childs;

	private Context context;

	public KHExpandableListAdapter(Context context,List<Map<String, Object>> groups, List<List<Map<String, Object>>> childs){

		this.context = context;
		this.groups = groups;
		this.childs = childs;
	}

	@Override
	public Object getChild(int groupPosition, int childPosition) {
		return childs.get(groupPosition).get(childPosition);
	}

	@Override
	public long getChildId(int groupPosition, int childPosition) {
		return childPosition;
	}

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


		TextView childView = getGenericView();
		childView.setText(childs.get(groupPosition).get(childPosition).get("child").toString());
		return childView;
	}

	@Override
	public int getChildrenCount(int groupPosition) {
		return childs.get(groupPosition).size();
	}

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

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

	@Override
	public long getGroupId(int groupPosition) {
		return groupPosition;
	}

	@Override
	public View getGroupView(int groupPosition, boolean isExpanded,
			View convertView, ViewGroup parent) {
		
		TextView groupView = getGenericView();
		groupView.setText(groups.get(groupPosition).get("group").toString());
		return groupView;
	}

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

	@Override
	public boolean isChildSelectable(int groupPosition, int childPosition) {
		return true;
	}

	private TextView getGenericView() {   

		AbsListView.LayoutParams lp = new AbsListView.LayoutParams(   
				ViewGroup.LayoutParams.FILL_PARENT, 36);   
		TextView textView = new TextView(context);   
		textView.setLayoutParams(lp);   
		textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);   
		textView.setPadding(36, 0, 0, 0);   
		return textView;   
	}

}

 ExpandableListViewActivity.java

public class ExpandableListViewActivity extends Activity {

	private ExpandableListView ELV;
	private List<Map<String,Object>> groups;
	private List<List<Map<String,Object>>> childs;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		ELV = new ExpandableListView(this);
		ELV.setBackgroundColor(Color.BLUE);
		groups = new ArrayList<Map<String,Object>>();
		childs = new ArrayList<List<Map<String,Object>>>();
		List<Map<String,Object>> child1 = new ArrayList<Map<String,Object>>();
		List<Map<String,Object>> child2 = new ArrayList<Map<String,Object>>();
		List<Map<String,Object>> child3 = new ArrayList<Map<String,Object>>();
		List<Map<String,Object>> child4 = new ArrayList<Map<String,Object>>();
		for(int i = 0; i < 4; i++){
			Map<String,Object> group = new HashMap<String,Object>();
			group.put("group", "第 " + i + " 组");
			groups.add(group);
		}
		
		for(int i = 0; i < 5; i++){
			Map<String,Object> child = new HashMap<String,Object>();
			child.put("child", "第 " + i + " 个child");
			child1.add(child);
			child2.add(child);
			child3.add(child);
			child4.add(child);
		}
		childs.add(child1);
		childs.add(child2);
		childs.add(child3);
		childs.add(child4);
		KHExpandableListAdapter KHA = new KHExpandableListAdapter(this,groups,childs);
		ELV.setOnChildClickListener(new OnChildClickListener(){

			@Override
			public boolean onChildClick(ExpandableListView parent, View v,
					int groupPosition, int childPosition, long id) {
//				Toast.makeText(ExpandableListViewActivity.this, childs.get(groupPosition).get(childPosition).get("child").toString(), Toast.LENGTH_SHORT).show();
				Intent intent = new Intent();
				intent.putExtra("wf" , groups.get(groupPosition).get("group").toString());
				intent.putExtra("user" , childs.get(groupPosition).get(childPosition).get("child").toString());
				ExpandableListViewActivity.this.setResult(RESULT_OK, intent);
				ExpandableListViewActivity.this.finish();
				return false;
			}
			
		});
		ELV.setAdapter(KHA);
		this.setContentView(ELV);
	}
}

 

<activity android:name=".ExpandableListViewActivity" android:theme="@android:style/Theme.Dialog"
			android:screenOrientation="portrait">
			<intent-filter>
				<action android:name="android.intent.action.ELV" />
			</intent-filter>
		</activity>