PullToRefreshListViewWithFooter.java

package com.michael.doubanonline.component;

import android.content.Context;
import android.text.format.DateUtils;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.michael.doubanonline.R;

/**
 * 让下来刷新支持底部的Footer
 * 
 * @author Michael
 * @version create time：2013-3-24 下午5:52:52
 */
public class PullToRefreshListViewWithFooter extends PullToRefreshListView
{

	public PullToRefreshListViewWithFooter(Context context)
	{
		super(context);
		init(context);
	}

	public PullToRefreshListViewWithFooter(Context context, AttributeSet attrs)
	{
		super(context, attrs);
		init(context);
	}

	public PullToRefreshListViewWithFooter(Context context, Mode mode)
	{
		super(context, mode);
		init(context);
	}

	public PullToRefreshListViewWithFooter(Context context, Mode mode, AnimationStyle style)
	{
		super(context, mode, style);
		init(context);
	}

	private View footerView;

	private void init(final Context context)
	{

		LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		footerView = (View) inflater.inflate(R.layout.list_footer_laod_more, this.getRefreshableView(), false);
		this.getRefreshableView().addFooterView(footerView);

		// 添加ListView下拉刷新的回调
		this.setOnRefreshListener(new OnRefreshListener<ListView>()
		{
			@Override
			public void onRefresh(PullToRefreshBase<ListView> refreshView)
			{
				String label = DateUtils.formatDateTime(context, System.currentTimeMillis(), DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_ABBREV_ALL);

				// 更新Head
				refreshView.getLoadingLayoutProxy().setLastUpdatedLabel(label);

				if (mOnFooterListViewRefreshListener != null)
				{

					mOnFooterListViewRefreshListener.onFooterListViewRefresh();
				}
			}
		});

		// 添加对ListView被拉到最底下
		this.setOnLastItemVisibleListener(new OnLastItemVisibleListener()
		{

			@Override
			public void onLastItemVisible()
			{

				if (mOnFooterListViewLastItemVisibleListener != null)
				{

					mOnFooterListViewLastItemVisibleListener.onFooterListViewLastItemVisible();
				}
			}
		});
	}

	/**
	 * 设置FootView的可见性
	 * */
	public void setFooterViewVisibility(int visiablity)
	{
		footerView.setVisibility(visiablity);
	}

	/** ListView footer的状态为加载完毕 */
	public static final int LOADING_STATE_DONE = 0;
	/** ListView footer的状态为加载更多 */
	public static final int LOADING_STATE_LOADING = 1;
	/** ListView footer的状态为加载失败 */
	public static final int LOADING_STATE_FAIL = 2;

	/**
	 * 设置ListView的footer，显示正在加载更多 有两种状态： LOADING_STATE_DONE
	 * 表示加载完成，左边的ProgressBar不显示，右边默认显示"加载完毕" LOADING_STATE_HAS_MORE
	 * 表示正在加载，左边显示ProgressBar，右边默认显示"加载中..."
	 * 
	 * @param loadingState
	 *            指定ListView的Footer的状态
	 * 
	 * */
	public void setListViewFooterContent(int loadingState)
	{

		setListViewFooterContent(loadingState, null);
	}

	/**
	 * 设置ListView的footer，显示正在加载更多 有两种状态： LOADING_STATE_DONE
	 * 表示加载完成，左边的ProgressBar不显示，右边默认显示"加载完毕" LOADING_STATE_HAS_MORE
	 * 表示正在加载，左边显示ProgressBar，右边默认显示"加载中..."
	 * 
	 * @param loadingState
	 *            指定ListView的Footer的状态
	 * @param showTip
	 *            显示自定义的内容
	 */
	public void setListViewFooterContent(int loadingState, String customTip)
	{

		if (footerView == null)
		{

			return;
		} else
		{

			if (loadingState != LOADING_STATE_DONE && loadingState != LOADING_STATE_LOADING && loadingState != LOADING_STATE_FAIL)
			{

				throw new IllegalArgumentException("the param can not be:" + loadingState);
			}
			// RelativeLayout llFooter =
			// (RelativeLayout)footerView.findViewById(R.id.rl_footer);
			// llFooter.setVisibility(View.VISIBLE);//因为默认在布局文件中是不可见的，这样在刚开始加载的时候（即ListView中没有数据的时候）就不会显示了
			ProgressBar pbLoading = (ProgressBar) footerView.findViewById(R.id.pb_loading);
			TextView tvFooter = (TextView) footerView.findViewById(R.id.tv_loading);
			switch (loadingState)
			{
			case LOADING_STATE_DONE:

				pbLoading.setVisibility(View.GONE);
				if (customTip == null)
				{

					customTip = "加载完毕";
				}
				break;

			case LOADING_STATE_LOADING:

				pbLoading.setVisibility(View.VISIBLE);
				if (customTip == null)
				{

					customTip = "正在加载...";
				}
				break;

			case LOADING_STATE_FAIL:

				pbLoading.setVisibility(View.GONE);
				if (customTip == null)
				{

					customTip = "加载失败，请重试";
				}
				break;

			default:
				break;
			}

			tvFooter.setText(new StringBuilder(customTip));
		}
	}

	private OnFooterListViewRefreshListener mOnFooterListViewRefreshListener;

	public interface OnFooterListViewRefreshListener
	{

		public void onFooterListViewRefresh();
	}

	public void setOnFooterListViewRefreshListener(OnFooterListViewRefreshListener mOnFooterListViewRefreshListener)
	{

		this.mOnFooterListViewRefreshListener = mOnFooterListViewRefreshListener;
	}

	private OnFooterListViewLastItemVisibleListener mOnFooterListViewLastItemVisibleListener;

	public interface OnFooterListViewLastItemVisibleListener
	{

		public void onFooterListViewLastItemVisible();
	}

	public void setOnFooterListViewLastItemVisibleListener(OnFooterListViewLastItemVisibleListener mOnFooterListViewLastItemVisibleListener)
	{

		this.mOnFooterListViewLastItemVisibleListener = mOnFooterListViewLastItemVisibleListener;
	}
}