android Listview下滑，自动加载数据.修改多处地方，去除重绘listvew,防止闪烁

});

整个代码比较简单只有一个类

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;

import com.ferris.ferrisapp.R;

public class LoadMoreListView extends ListView implements OnScrollListener {

	private static final String TAG = "LoadMoreListView";

	/**
	 * Listener that will receive notifications every time the list scrolls.
	 */
	private OnScrollListener mOnScrollListener;
	private LayoutInflater mInflater;
	private Boolean isEnable = true;

	public Boolean getIsEnable() {
		return isEnable;
	}

	public void setIsEnable(Boolean isEnable) {
		this.isEnable = isEnable;
	}

	// footer view
	private RelativeLayout mFooterView;
	// private TextView mLabLoadMore;
	private ProgressBar mProgressBarLoadMore;

	// Listener to process load more items when user reaches the end of the list
	private OnLoadMoreListener mOnLoadMoreListener;
	// To know if the list is loading more items
	private boolean mIsLoadingMore = false;
	private int mCurrentScrollState;

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

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

	public LoadMoreListView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		init(context);
	}

	private void init(Context context) {

		mInflater = (LayoutInflater) context
				.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

		// footer
		mFooterView = (RelativeLayout) mInflater.inflate(
				R.layout.load_more_footer, this, false);//加载底部view
		/*
		 * mLabLoadMore = (TextView) mFooterView
		 * .findViewById(R.id.load_more_lab_view);
		 */
		mProgressBarLoadMore = (ProgressBar) mFooterView
				.findViewById(R.id.load_more_progressBar);

		addFooterView(mFooterView);

		super.setOnScrollListener(this);//设置滚动监听
	}

	@Override
	public void setAdapter(ListAdapter adapter) {
		super.setAdapter(adapter);
	}

	/**
	 * Set the listener that will receive notifications every time the list
	 * scrolls.
	 * 
	 * @param l
	 *            The scroll listener.
	 */
	@Override
	public void setOnScrollListener(AbsListView.OnScrollListener l) {
		mOnScrollListener = l;
	}

	/**
	 * Register a callback to be invoked when this list reaches the end (last
	 * item be visible)
	 * 
	 * @param onLoadMoreListener
	 *            The callback to run.
	 */

	public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) {
		mOnLoadMoreListener = onLoadMoreListener;
	}

	public void onScroll(AbsListView view, int firstVisibleItem,
			int visibleItemCount, int totalItemCount) {
		if (isEnable) {//是否开启滑动
		if (mOnScrollListener != null) {
			mOnScrollListener.onScroll(view, firstVisibleItem,
					visibleItemCount, totalItemCount);
		}

		

			if (mOnLoadMoreListener != null) {

				if (visibleItemCount == totalItemCount) {//刚好铺满一个屏幕，
					mProgressBarLoadMore.setVisibility(View.GONE);
					return;
				}

				boolean loadMore = firstVisibleItem + visibleItemCount >= totalItemCount;//滑动到底部

				if (!mIsLoadingMore && loadMore
						&& mCurrentScrollState != SCROLL_STATE_IDLE) { //判断如果滚动到底部，并且已经停止滚动的时候，我们就显示底部加载更多。
					mProgressBarLoadMore.setVisibility(View.VISIBLE);
					mIsLoadingMore = true; 
					onLoadMore();//回调监听
				}

			}
		}

	}
	

	/**
	 *   禁止滑动 ，view重绘，否则导致闪烁
	 */
public void onScrollStateChanged(AbsListView view, int scrollState) {
		
		// bug fix: listview was not clickable after scroll //由于我并不需要listvie item是否可以按。所以我屏蔽掉了这个，否则有可能加载图片会闪烁不停哦。这个地方要注意。
		if (isEnable) {//是否开启滑动
			
//		if (scrollState == OnScrollListener.SCROLL_STATE_IDLE) {
//			view.invalidateViews();
//		}

		mCurrentScrollState = scrollState;

		if (mOnScrollListener != null) {
			mOnScrollListener.onScrollStateChanged(view, scrollState);
		}
		}
	}
	

	public void onLoadMore() {
		Log.d(TAG, "onLoadMore");
		if (mOnLoadMoreListener != null) {
			mOnLoadMoreListener.onLoadMore();
		}
	}

	/**
	 * Notify the loading more operation has finished
	 */
	public void onLoadMoreComplete() {
		mIsLoadingMore = false;
		mProgressBarLoadMore.setVisibility(View.GONE);
	}

	/**
	 * Interface definition for a callback to be invoked when list reaches the
	 * last item (the user load more items in the list)
	 */
	public interface OnLoadMoreListener {
		/**
		 * Called when the list reaches the last item (the last item is visible
		 * to the user)
		 */
		public void onLoadMore();
	}

}