赵雅智_AndroidUI_Android中listview可折叠伸缩仿手风琴效果（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;
        }  

优化为

isCurrentItems[position] = !isCurrentItems[position];