Android ListView的分段展示、分页显示(二)

package com.iaiai.activity;import android.app.ListActivity;import android.os.Bundle;import android.util.Log;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.AbsListView.OnScrollListener;import android.widget.BaseAdapter;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.TextView;/** *  * <p> * Title: IaiaiActivity.java * </p> * <p> * E-Mail: [email protected] * </p> * <p> * QQ: 176291935 * </p> * <p> * Http: iaiai.iteye.com * </p> * <p> * Create time: 2011-6-26 * </p> *  * @author 丸子 * @version 0.0.1 */public class IaiaiActivity extends ListActivity implements OnScrollListener {	private static final String TAG = "IaiaiActivity";	private listViewAdapter adapter = new listViewAdapter();	private int lastItem = 0;	/**	 * 设置布局显示为目标有多大就多大	 */	private LayoutParams WClayoutParams = new LinearLayout.LayoutParams(			LinearLayout.LayoutParams.WRAP_CONTENT,			LinearLayout.LayoutParams.WRAP_CONTENT);	/**	 * 设置布局显示目标最大化	 */	private LayoutParams FFlayoutParams = new LinearLayout.LayoutParams(			LinearLayout.LayoutParams.FILL_PARENT,			LinearLayout.LayoutParams.FILL_PARENT);	private ProgressBar progressBar;	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		Log.i(TAG, "onCreate(Bundle savedInstanceState)");		// 线性布局		LinearLayout layout = new LinearLayout(this);		// 设置布局 水平方向		layout.setOrientation(LinearLayout.HORIZONTAL);		// 进度条		progressBar = new ProgressBar(this);		// 进度条显示位置		progressBar.setPadding(0, 0, 15, 0);		layout.addView(progressBar, WClayoutParams);		TextView textView = new TextView(this);		textView.setText("加载中...");		textView.setGravity(Gravity.CENTER_VERTICAL);		layout.addView(textView, FFlayoutParams);		layout.setGravity(Gravity.CENTER);		LinearLayout loadingLayout = new LinearLayout(this);		loadingLayout.addView(layout, WClayoutParams);		loadingLayout.setGravity(Gravity.CENTER);		// 得到一个ListView用来显示条目		ListView listView = getListView();		// 添加到脚页显示		listView.addFooterView(loadingLayout);		//		registerForContextMenu(listView);		//		setListAdapter(adapter);		listView.setOnScrollListener(this);	}	public void onScroll(AbsListView v, int firstVisibleItem,			int visibleItemCount, int totalItemCount) {		lastItem = firstVisibleItem + visibleItemCount - 1;		System.out.println("lastItem:" + lastItem);		Log.i(TAG, "lastItem:" + lastItem);	}	public void onScrollStateChanged(AbsListView v, int state) {		if (lastItem == adapter.count				&& state == OnScrollListener.SCROLL_STATE_IDLE) {			adapter.count += 10;			adapter.notifyDataSetChanged();			Log.i(TAG, "lastItem:" + lastItem);		}	}	/**	 * 要用用于生成显示数据	 */	class listViewAdapter extends BaseAdapter {		int count = 10;		public int getCount() {			Log.i(TAG, "count:" + count);			return count;		}		public Object getItem(int pos) {			Log.i(TAG, "pos:" + pos);			return pos;		}		public long getItemId(int pos) {			return pos;		}		public View getView(int pos, View v, ViewGroup p) {			TextView view = new TextView(IaiaiActivity.this);			view.setText("丸子测试数据 " + pos);			Log.i(TAG, "entry: " + pos);			view.setHeight(50);			return view;		}	}}