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：
packagecn.stay.activity;
importjava.util.ArrayList;
importjava.util.List;
importcom.aoran.R;
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.view.View;
importandroid.widget.AbsListView;
importandroid.widget.AbsListView.OnScrollListener;
importandroid.widget.LinearLayout;
importandroid.widget.ListView;
importandroid.widget.ProgressBar;
/**
*@authorriddlezhang
*滚动listview提示等待框
*/
publicclassListView_sepextendsActivityimplementsOnScrollListener{
privateList<String>list=newArrayList<String>();
privateListViewlistv01;
privateMyAdapteradapter;
privateintcurrent_page=2;
ProgressBarprogressBar;
privateLinearLayoutbottom_linear;
privateintlastItem;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
//TODOAuto-generatedmethodstub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listv01=(ListView)findViewById(R.id.listv01);
bottom_linear=(LinearLayout)findViewById(R.id.bottom_linear);
for(inti=0;i<100;i++){
list.add("i="+i);
}
adapter=newMyAdapter(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
publicvoidonScrollStateChanged(AbsListViewview,intscrollState){
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
publicvoidonScroll(AbsListViewview,intfirstVisibleItem,
intvisibleItemCount,inttotalItemCount){
lastItem=firstVisibleItem+visibleItemCount;
}
}
file2：
packagecn.stay.activity;
importjava.util.List;
importcom.aoran.R;
importandroid.content.Context;
importandroid.view.LayoutInflater;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.widget.BaseAdapter;
importandroid.widget.TextView;
publicclassMyAdapterextendsBaseAdapter{
privateContextmContext;
privateList<String>list;
publicintcount=20;
privateViewHolderholder;
publicMyAdapter(ContextmContext,List<String>list){
this.mContext=mContext;
this.list=list;
}
@Override
publicintgetCount(){
returncount;
}
@Override
publicObjectgetItem(intposition){
//TODOAuto-generatedmethodstub
returnlist.get(position);
}
@Override
publiclonggetItemId(intposition){
returnposition;
}
@Override
publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
//TODOAuto-generatedmethodstub
if(convertView==null||convertView.getTag()==null){
convertView=LayoutInflater.from(mContext).inflate(R.layout.adapter,null);
holder=newViewHolder();
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));
returnconvertView;
}
privateclassViewHolder{
privateTextViewadapter_tv;
}
}
file3：
main.xml
<?xmlversion="1.0"encoding="utf-8"?> <RelativeLayoutxmlns: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" > <LinearLayoutandroid:id="@+id/bottom_linear"android:layout_alignParentBottom="true"android:layout_width="fill_parent"android:layout_height="50dip"android:gravity="center"android:visibility="gone"> <ProgressBarandroid:layout_width="24dip"android:layout_height="24dip"android:layout_marginLeft="20dip"/> <TextViewandroid: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> <ListViewandroid: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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