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>

更多关于android相关内容感兴趣的读者可查看本站专题：《android视图view技巧总结》、《android布局layout技巧总结》、《android图形与图像处理技巧总结》、《android开发入门与进阶教程》、《android调试技巧与常见问题解决方法汇总》、《android多媒体操作技巧汇总(音频,视频,录音等)》、《android基本组件用法总结》及《android控件用法总结》

希望本文所述对大家android程序设计有所帮助。