ContactsListAdapter.java example

package com.partynetwork.iparty.contacts;

import java.util.List;

import com.partynetwork.dataprovider.util.PinyinUtil;
import com.partynetwork.iparty.app.common.BitmapManager;
import com.partynetwork.iparty.info.ContactsInfo;

import android.app.Activity;
import android.util.SparseArray;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.SectionIndexer;

/**
 * 联系人列表适配器。
 * 
 * @author guolin
 */
public class ContactsListAdapter extends ArrayAdapter<ContactsInfo> {


	/**
	 * 用来记录view列表
	 */
	public SparseArray<ContactsListView> sparseList;

	/**
	 * 字母表分组工具
	 */
	private SectionIndexer mIndexer;
	private Activity activity;

	private BitmapManager bitmapManager;

	/** 布局的类型 */
	private int pageType;

	public ContactsListAdapter(Activity activity, List<ContactsInfo> objects) {
		super(activity, 0, objects);
		this.activity = activity;
		bitmapManager = new BitmapManager();
		sparseList = new SparseArray<ContactsListView>();
	}

	public void setPageType(int pageType) {
		this.pageType = pageType;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		
		ContactsListView contactsView = (ContactsListView) convertView;
		if (contactsView == null) {
			contactsView = new ContactsListView(activity, pageType,
					bitmapManager);
			sparseList.put(position, contactsView);
		}

		ContactsInfo contact = getItem(position);

		contactsView.setInfo(contact);

		int section = mIndexer.getSectionForPosition(position);
		if (position == mIndexer.getPositionForSection(section)) {
			contactsView.setKey(PinyinUtil.getSortKey(contact.getUserName()));
			contactsView.getKeyLayout().setVisibility(View.VISIBLE);
		} else {
			contactsView.getKeyLayout().setVisibility(View.GONE);
		}

		return contactsView;
	}

	/**
	 * 给当前适配器传入一个分组工具。
	 * 
	 * @param indexer
	 */
	public void setIndexer(SectionIndexer indexer) {
		mIndexer = indexer;
	}
}