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其实原理很简单,只需要设置监听listview的滚动事件即可,
package cn.stay.activity;
import java.util.ArrayList;
import java.util.List;
import com.aoran.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;

/**
 * @author riddlezhang
 *	滚动listview提示等待框
 */
public class ListView_sep extends Activity implements OnScrollListener {

	private List<String> list = new ArrayList<String>();
	private ListView listv01;
	private MyAdapter adapter;
	private int current_page = 2;
	ProgressBar progressBar;
	private LinearLayout bottom_linear;
	private int lastItem;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		listv01 = (ListView) findViewById(R.id.listv01);
		bottom_linear=(LinearLayout) findViewById(R.id.bottom_linear);
		for (int i = 0; i < 100; i++) {
			list.add("i="+i);
		}
		adapter = new MyAdapter(ListView_sep.this, list);
		listv01.setAdapter(adapter);
//		listv01.setSelection(getSingerStrs().size()-1); 设置每次最后一行被选中
		listv01.setOnScrollListener(this);
	}
	@Override
	public void onScrollStateChanged(AbsListView view, int scrollState) {
		if (lastItem==adapter.count && scrollState == OnScrollListener.SCROLL_STATE_IDLE) {
			if ((list.size() - current_page * 10) > 0) {
				bottom_linear.setVisibility(View.VISIBLE);
				if ((list.size() - current_page * 10) >= 10) {
					adapter.count += 10;
				} else {
					adapter.count += (list.size() - current_page * 10);
				}
				current_page++;
				adapter.notifyDataSetChanged();
//				bottom_linear.setVisibility(View.GONE);
			}
		}
	}
	@Override
	public void onScroll(AbsListView view, int firstVisibleItem,
			int visibleItemCount, int totalItemCount) {
			lastItem=firstVisibleItem+visibleItemCount;
	}
}
package cn.stay.activity;

import java.util.List;

import com.aoran.R;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class MyAdapter extends BaseAdapter{
	private Context mContext;
	private List<String> list;
	public int count=20;
	private ViewHolder holder;
	
	public MyAdapter(Context mContext,List<String> list) {
		this.mContext=mContext;
		this.list=list;
	}
	@Override
	public int getCount() {
		return count;
	}

	@Override
	public Object getItem(int position) {
		// TODO Auto-generated method stub
		return list.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		if(convertView==null || convertView.getTag()==null){
			convertView=LayoutInflater.from(mContext).inflate(R.layout.adapter,null);
			holder = new ViewHolder();
			holder.adapter_tv=(TextView) convertView.findViewById(R.id.adapter_tv);
			convertView.setTag(holder);
			}else{
				holder=(ViewHolder) convertView.getTag();
			}
		holder.adapter_tv.setText(list.get(position));
		return convertView;
	}

	private class ViewHolder{
		private TextView adapter_tv;
	}
}

 

main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/project_main_bg"
    >
    <LinearLayout android:id="@+id/bottom_linear" android:layout_alignParentBottom="true" android:layout_width="fill_parent" android:layout_height="50dip" android:gravity="center" android:visibility="gone">
	    <ProgressBar android:layout_width="24dip" android:layout_height="24dip" android:layout_marginLeft="20dip" />
	    <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="正在加载,请稍后。。。" android:textColor="#FFFFFF" android:textSize="20sp" android:gravity="center"/>
    </LinearLayout>
    <ListView android:id="@+id/listv01" android:background="@null" android:layout_above="@id/bottom_linear" android:layout_width="fill_parent" android:layout_height="wrap_content" android:listSelector="#00000000" android:cacheColorHint="#00000000"/>
</RelativeLayout>

posted on 2010-12-08 11:11  stay  阅读(7445)  评论(0编辑  收藏