Android编程实现ListView滚动提示等待框功能示例
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2023-12-18 17:18:46
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...
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>
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