Android编程实现ListView滚动提示等待框功能示例

本文实例讲述了Android编程实现ListView滚动提示等待框功能。分享给大家供大家参考，具体如下：

其实原理很简单，只需要设置监听listview的滚动事件即可

file1：

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;
 }
}

file2：

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;
 }
}

file3：

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>

希望本文所述对大家Android程序设计有所帮助。