ExpandableListView的使用多级列表

多级列表ExpandableListView

扩展列表能够显示一个指示在每项显示项的当前状态（状态通常是一个扩展的组，组的孩子，或倒塌，最后一个孩子）。使用setchildindicator（drawable）或setgroupindicator（drawable）（或相应的XML属性）来设置这些指标,一个默认的风格多级列表提供指标，将示给意见多级列表。布局android.r.layout.simple_expandable_list_item_1和android.r.layout.simple_expandable_list_item_2（应用simplecursortreeadapter）包含位置信息的首选指标。

效果图：

   

 

activity_main.xml

    
    

child_item.xml


    
    

groud_item.xml

    
    

 

MainActivity.java

 

 

public class MainActivity extends Activity {
	private ExpandableListView listView;
	private List group;
	private List> child;
	private MyAdapter adapter;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		listView = (ExpandableListView) findViewById(R.id.expandableListView);
		/**
		 * 初始化数据 
		 */
		initData();
		adapter = new MyAdapter(this,group,child);
		listView.setAdapter(adapter);
	
	}
	
	
	

	private void initData() {
		group = new ArrayList();
		child = new ArrayList>();
		addInfo("笑傲江湖",new String[]{"东方不败","风清扬","令狐冲","岳不群"});
		addInfo("天龙八部", new String[]{"乔峰","虚竹","段誉"});
		addInfo("九阴真经", new String[]{"中神通","东邪","西毒","南帝","北丐"});
	}
	
	/**
	 * 添加数据信息
	 * @param g
	 * @param c
	 */
	private void addInfo(String g,String[] c) {
		group.add(g);
		List list = new ArrayList();
		for (int i = 0; i < c.length; i++) {
			list.add(c[i]);
		}
		child.add(list);
	}

}

Adapter.java

 

 

 

/**
 * expandableListView的用法同ListView
 *
 */
public class MyAdapter extends BaseExpandableListAdapter {
	private Context context;
	private List group;
	private List> child;
	private int[] img={R.drawable.l2,R.drawable.l3,R.drawable.l1};
	public MyAdapter(Context context, List group,
			List> child) {
		this.context = context;
		this.group = group;
		this.child = child;
	}

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

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

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

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

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

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

	@Override
	public boolean hasStableIds() {
		return false;
	}
	
    /**
    *
    * 获取显示指定组的视图对象
    *
    * @param groupPosition 组位置
    * @param isExpanded 该组是展开状态还是伸缩状态
    * @param convertView 重用已有的视图对象
    * @param parent 返回的视图对象始终依附于的视图组
    * @return
    * @see android.widget.ExpandableListAdapter#getGroupView(int, boolean, android.view.View,
    *      android.view.ViewGroup)
    */
	@Override
	public View getGroupView(int groupPosition, boolean isExpanded,
			View convertView, ViewGroup parent) {
		ViewHolder holder;
		if (convertView == null) {
			convertView = LayoutInflater.from(context).inflate(
					R.layout.groud_item, null);
			holder = new ViewHolder();
			holder.textView = (TextView) convertView
					.findViewById(R.id.textView);
			holder.mImageView=(ImageView) convertView.findViewById(R.id.imageView1);
			convertView.setTag(holder);
		} else {
			holder = (ViewHolder) convertView.getTag();
		}
		holder.textView.setText(group.get(groupPosition));
		holder.textView.setTextSize(25);
		holder.textView.setPadding(36, 10, 0, 10);
		holder.mImageView.setImageResource(img[groupPosition]);
		return convertView;

	}
	
	/**
    *
    * 获取一个视图对象，显示指定组中的指定子元素数据。
    *
    * @param groupPosition 组位置
    * @param childPosition 子元素位置
    * @param isLastChild 子元素是否处于组中的最后一个
    * @param convertView 重用已有的视图(View)对象
    * @param parent 返回的视图(View)对象始终依附于的视图组
    * @return
    * @see android.widget.ExpandableListAdapter#getChildView(int, int, boolean, android.view.View,
    *      android.view.ViewGroup)
    */
	@Override
	public View getChildView(int groupPosition, int childPosition,
			boolean isLastChild, View convertView, ViewGroup parent) {
		ViewHolder holder;
		if (convertView == null) {
			convertView = LayoutInflater.from(context).inflate(
					R.layout.child_item, null);
			holder = new ViewHolder();
			holder.textView = (TextView) convertView
					.findViewById(R.id.textViews);
			convertView.setTag(holder);
		} else {
			holder = (ViewHolder) convertView.getTag();
		}
		holder.textView.setText(child.get(groupPosition).get(childPosition));
		holder.textView.setTextSize(20);
		holder.textView.setPadding(72, 10, 0, 10);
		return convertView;
	}

	

	 /**
    *
    * 是否选中指定位置上的子元素。
    *
    * @param groupPosition
    * @param childPosition
    * @return
    * @see android.widget.ExpandableListAdapter#isChildSelectable(int, int)
    */
	@Override
	public boolean isChildSelectable(int groupPosition, int childPosition) {
		return false;
	}

	
	class ViewHolder {
		ImageView mImageView;
		TextView textView;
	}
}

源码下载：

 

Eclipse下载：http://download.csdn.net/detail/dickyqie/9630549

AndroidStudio下载：https://github.com/DickyQie/ListViewExpandableListViewDelete/tree/expandablelistview