赵雅智_AndroidUI_Android中listview可折叠舒卷仿手风琴效果（动态）

之前写了一篇静态数据listview显示手风琴效果，今天写的博客是动态实现listview的手风琴效果

静态链接：listview静态手风琴效果

数据都是存储在数据库中的，如果想要获取数据就要查询数据库

并且实现了：点击查看想要看的名片的时候，上一个打开的就能关闭

核心代码如下：

package com.cards.activity;import java.util.List;import android.app.Activity;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.RelativeLayout;import android.widget.TextView;import com.cards.R;import com.cards.commom.Common;import com.cards.commom.MyApp;import com.cards.dao.CardDao;import com.cards.dao.CardDaoImp;import com.cards.entity.Card;public class CardsListAct extends Activity implements OnItemClickListener {	private FlexListAdapter adapter;	private List<Card> list;	private boolean[] isCurrentItems;	private ListView lv_cards;	private Button btnRegistered;	private TextView tvTitle;	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.act_cardlist);		lv_cards = (ListView) findViewById(R.id.list_cards);		lv_cards.setSelector(R.color.transparent);		// 初始化数据		init();			}	/**	 * 	 * @explaination 初始化数据	 * @author yazhizhao	 * @time 2014-7-23上午11:30:12	 */	private void init() {		// 查找数据库数据		CardDao cardDao = new CardDaoImp(this);		list = cardDao.findAll();		// 是否点开的list集合		isCurrentItems = new boolean[list.size()];		// 刚进入的时候全部条目显示闭合状态		for (int i = 0; i < isCurrentItems.length; i++) {			isCurrentItems[i] = false;		}		// 设置adapter		adapter = new FlexListAdapter();		lv_cards.setAdapter(adapter);		lv_cards.setOnItemClickListener(this);	}	@Override	public void onItemClick(AdapterView<?> parent, View view, int position,			long id) {		/*		 * 只打开一个		 */		for (int i = 0; i < isCurrentItems.length; i++) {			if (i != position) {				isCurrentItems[i] = false;			}		}		// 打开或者合上		isCurrentItems[position] = !isCurrentItems[position];		// 即时刷新		adapter.notifyDataSetChanged();	}	/**	 * 	 * @explaination 自定义adapter	 * @author yazhizhao	 * @time 2014-7-23上午11:33:39	 */	class FlexListAdapter extends BaseAdapter {		public int getCount() {			return list.size();		}		public Object getItem(int pos) {			return pos;		}		public long getItemId(int pos) {			return pos;		}		public View getView(int pos, View v, ViewGroup p) {			FlexLinearLayout view = null;			if (null == v) {				view = new FlexLinearLayout(CardsListAct.this, list.get(pos),						pos, false);			} else {				view = (FlexLinearLayout) v;				view.setWorkTitleLayout(list.get(pos), pos, isCurrentItems[pos]);			}			return view;		}	}	/**	 * 	 * @explaination 自定义线性布局	 * @author yazhizhao	 * @time 2014-7-23上午11:25:07	 */	public class FlexLinearLayout extends LinearLayout {		public static final int BULE = 0xFF3D8CB8;		private LinearLayout layout;		private RelativeLayout rlName;		private RelativeLayout rlCards;		private TextView tvCardsPhoneNumInfo;		private TextView tvCardsAddressInfo;		private TextView tvCardsMailInfo;		private TextView tvCardsOtherInfo;		private TextView tvCardsName;		private TextView tvCardName;		private ImageView imgCardsDel;		private LayoutInflater mInflater;		/**		 * 创建一个带有伸缩效果的LinearLayout		 * 		 * @param context		 *            上下文对象		 * @param card		 *            内容详细		 * @param position		 *            该列所在列表的位置		 * @param isCurrentItem		 *            是否为伸展		 */		public FlexLinearLayout(final Context context, final Card card,				final int position, boolean isCurrentItem) {			super(context);			mInflater = (LayoutInflater) context					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);			layout = (LinearLayout) mInflater.inflate(R.layout.act_cards_list,					null);			rlName = (RelativeLayout) layout.findViewById(R.id.rl_name);			rlCards = (RelativeLayout) layout.findViewById(R.id.rl_cards);			tvCardsPhoneNumInfo = (TextView) layout					.findViewById(R.id.tv_mc_phoneNum);			tvCardsName = (TextView) layout.findViewById(R.id.tv_cards_name);			tvCardName = (TextView) layout.findViewById(R.id.tv_card_name);			tvCardsAddressInfo = (TextView) layout					.findViewById(R.id.tv_mc_addressInfo);			tvCardsMailInfo = (TextView) layout.findViewById(R.id.tv_mc_mail);			tvCardsOtherInfo = (TextView) layout					.findViewById(R.id.tv_mc_otherInfo);			imgCardsDel = (ImageView) layout.findViewById(R.id.iv_cards_del);			tvCardsPhoneNumInfo.setOnClickListener(new OnClickListener() {				@Override				public void onClick(View v) {					String phone_Num = tvCardsPhoneNumInfo.getText().toString()							.trim();					Intent intent = new Intent(Intent.ACTION_CALL, Uri							.parse("tel:" + phone_Num));					startActivity(intent);				}			});			imgCardsDel.setOnClickListener(new OnClickListener() {				@Override				public void onClick(View v) {					Builder builder = new AlertDialog.Builder(CardsListAct.this);					builder.setMessage("确定要删除此名片？")							.setCancelable(false)							.setPositiveButton("确认",									new DialogInterface.OnClickListener() {										public void onClick(												DialogInterface dialog, int id) {											CardDao cardDao = new CardDaoImp(													context);											cardDao.delete(card.getId());											init();										}									})							.setNegativeButton("取消",									new DialogInterface.OnClickListener() {										public void onClick(												DialogInterface dialog, int id) {											dialog.cancel();										}									});					builder.create().show();				}			});			this.addView(layout);			setWorkTitleLayout(card, position, isCurrentItem);		}		/**		 * 设置该列的状态及样式		 * 		 * @param card		 *            内容详细		 * @param position		 *            该列所在列表的位置		 * @param isCurrentItem		 *            是否为伸展		 */		public void setWorkTitleLayout(final Card card, final int position,				boolean isCurrentItem) {			rlName.setBackgroundResource(R.drawable.title_2);			tvCardsName.setText(card.getTruename());			tvCardsName.setTextColor(BULE);			if (isCurrentItem) {				tvCardName.setText(card.getTruename());				tvCardsOtherInfo.setText(card.getMeno());				tvCardsPhoneNumInfo.setText("电话:" + card.getMobile1());				tvCardsMailInfo.setText("邮箱:" + card.getEmail());				tvCardsAddressInfo.setText("地址:" + card.getAddress());			}			rlCards.setVisibility(isCurrentItem ? VISIBLE : GONE);		}	}	@Override	protected void onStart() {		super.onStart();		init();		// 给线性布局设置adapter		MyApp.getInstance().addActivity(this);	}	@Override	protected void onDestroy() {		Common.DestroyLoading(CardsListAct.this);		finish();		super.onDestroy();	}}

知识点解析：

设置adapter要放在init中，当删除数据的时候调用init才不会出错，

如果只是放在oncreate中，删除数据再刷新的时候就会报错

// 设置adapter		adapter = new FlexListAdapter();		lv_cards.setAdapter(adapter);		lv_cards.setOnItemClickListener(this);

这段代码就是控制只打开一个item，当打开其中一个item的时候其他的关闭

for (int i = 0; i < isCurrentItems.length; i++) {			if (i != position) {				isCurrentItems[i] = false;			}		}

判断打开还是关闭的优化代码：

 if (isCurrentItems[position]) {              isCurrentItems[position] = false;          } else {              isCurrentItems[position] = true;          }  

isCurrentItems[position] = !isCurrentItems[position];