ListView 分页效果

效果图

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<ListView
android:id="@+id/lv_show"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>

</RelativeLayout>

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.Adapter;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {
private ListView lv_show = null;
private List<String> list = null;
private boolean isBottom=false;
ArrayAdapter<String> adapter = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
setdata();
Listener();

}

private void Listener() {
// TODO Auto-generated method stub

lv_show.setOnScrollListener(new OnScrollListener() {

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
if(isBottom){

new LoadDataTask().execute();
isBottom=false;
}
}

@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {

if(firstVisibleItem+visibleItemCount==totalItemCount){
isBottom=true;
}
}
});

}
class LoadDataTask extends AsyncTask<Void,Void, List<String>>{
private ProgressDialog pd=null;
@Override
protected void onPreExecute() {
pd=new ProgressDialog(MainActivity.this);
pd.setTitle("正在加载...");
pd.setMessage("请稍候...");
pd.show();
}
protected List<String> doInBackground(Void... params) {
// TODO Auto-generated method stub
List<String>list2=new ArrayList<String>();
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for(int i=0;i<20;i++){
list2.add("动态添加"+i);
}
return list2;
}

protected void onPostExecute(List<String> result) {
MainActivity.this.list.addAll(list.size(),result);
adapter.notifyDataSetChanged();
lv_show.setSelection(MainActivity.this.list.size());
pd.dismiss();
super.onPostExecute(result);
}
}
private void setdata() {
// TODO Auto-generated method stub
list = new ArrayList<String>();
for (int i = 0; i < 50; i++) {
list.add("我要高薪就业" + i);
}
adapter = new ArrayAdapter<String>(
MainActivity.this, android.R.layout.simple_dropdown_item_1line,
list);
lv_show.setAdapter(adapter);
}

private void initView() {
// TODO Auto-generated method stub
lv_show = (ListView) findViewById(R.id.lv_show);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

lv_show.setOnScrollListener(new OnScrollListener() {

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
if(scrollState==OnScrollListener.SCROLL_STATE_IDLE){
ListView lv=(ListView) view;

int lastVisiblePosition = lv.getLastVisiblePosition();
if(lastVisiblePosition==list.size()-1){
new LoadDataTask().execute();
}

}

}

@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {

}
});