ListView分页加载

来源：互联网发布：php pack h 编辑：程序博客网时间：2024/05/16 09:34
import java.util.ArrayList;import java.util.List;import com.lidroid.xutils.view.annotation.ViewInject;import com.lidroid.xutils.view.annotation.event.OnClick;import android.os.Bundle;import android.app.Activity;import android.util.Log;import android.view.Menu;import android.view.View;import android.widget.AbsListView;import android.widget.AbsListView.OnScrollListener;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.Toast;public class MainActivity extends Activity implements OnScrollListener{@ViewInject(R.id.lv)private ListView lv;private ArrayAdapter<String> adapter = null;private List<String> data = null;//保存数据//是否需要加载更多private boolean isLoad = false;int count = 1;@OnClick(R.id.lv)public void sa(View v){}@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.activity_main);lv = (ListView)findViewById(R.id.lv);data = new ArrayList<String>();initData("");adapter = new ArrayAdapter<String>(getApplicationContext(),R.layout.list_pager_item,data);lv.setAdapter(adapter);lv.setOnScrollListener(this);}    // "" 本地数据   web 网络数据private void initData(String param) {// TODO Auto-generated method stubfor(int i=0;i<30;i++){data.add(param+" data"+i);}}//@Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {// TODO Auto-generated method stub//Log.i("aaa", "onScroll");Log.i("TAG", "firstVisibleItem="+firstVisibleItem);Log.i("TAG", "visibleItemCount="+visibleItemCount);Log.i("TAG", "totalItemCount="+totalItemCount);isLoad = ((firstVisibleItem+visibleItemCount)==totalItemCount);}/* (non-Javadoc) *  * SCROLL_STATE_FLING 手指做出抛的动作 * SCROLL_STATE_IDLE 停止滚动 * SCROLL_STATE_TOUCH_SCROLL 手指在屏幕上，屏幕滚动 * @see android.widget.AbsListView.OnScrollListener#onScrollStateChanged(android.widget.AbsListView, int) */@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {// TODO Auto-generated method stub//当ListView滚动到底部，并且ListView停止滚动Log.i("TAG", "onScrollStateChanged  isLoad="+isLoad+";是否是停止滚动："+(scrollState==OnScrollListener.SCROLL_STATE_IDLE));Log.i("TAG", "scrollState"+scrollState);if(isLoad&&scrollState==OnScrollListener.SCROLL_STATE_IDLE){Toast.makeText(getApplicationContext(), "开始加载数据", 1).show();initData("web"+count);count++;adapter.notifyDataSetChanged();}}}
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