Android ListView的分段显示、分页显示(二)

直接上代码

IaiaiActivity.java:

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: [e-mail]
 * </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;
		}
	}

}

评论

1 楼 1fan 2011-08-03  

非常感謝你的分享，支持支持&支持!!!