Android编程实现ListView滚动提示等待框功能示例

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;  }}

<?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>