android Listview分批加载+自动加载（附源码下载）

标签：android   listview   

直接上代码，代码有注释：

public class TestForListviewActivity extends Activity implements
		OnScrollListener {
	private ListView mListview = null;
	private View mFooterView;
	private PaginationAdapter mAdapter;
	private Handler handler=new Handler();
	private boolean isLoading;//表示是否正在加载
	private final int MAX_COUNT=35;//表示服务器上总共有MAX_COUNT条数据
	private final int EACH_COUNT=10;//表示每次加载的条数
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		mFooterView = getLayoutInflater().inflate(R.layout.loadmore, null);
		mListview = (ListView) findViewById(R.id.listview);
		mListview.addFooterView(mFooterView);// 设置列表底部视图
		
		List<News> news=new ArrayList<News>();
		mAdapter = new PaginationAdapter(news);;
		mListview.setAdapter(mAdapter);
		//设置setOnScrollListener会自动调用onscroll方法。
		mListview.setOnScrollListener(this);

	}

	public void onScroll(AbsListView view, int firstVisibleItem,
			int visibleItemCount, int totalItemCount) {
		
		if (firstVisibleItem+visibleItemCount==totalItemCount&&!isLoading) {
			//isLoading = true 表示正在加载，加载完毕设置isLoading =false；
			isLoading = true;
			//如果服务端还有数据，则继续加载更多，否则隐藏底部的加载更多
			if (totalItemCount<=MAX_COUNT) {
				//等待2秒之后才加载，模拟网络等待时间为2s
				handler.postDelayed(new Runnable() {
					
					public void run() {
						loadMoreData();
					}
				},2000);
			}else{
				if (mListview.getFooterViewsCount()!=0) {
					mListview.removeFooterView(mFooterView);
				}
			}
			
		}

	}

	public void onScrollStateChanged(AbsListView arg0, int arg1) {
		Log.i("onScrollStateChanged", arg1+"");
	}
	
	private void loadMoreData(){
		int count = mAdapter.getCount();
		for (int i = 0; i < EACH_COUNT; i++) {
			if (count+i<MAX_COUNT) {
				News item = new News();
				item.setTitle("Title" + (count+i));
				item.setContent("This is News Content" + (count+i));
				mAdapter.addNewsItem(item);
			}else{
				mListview.removeFooterView(mFooterView);
			}
		}
		mAdapter.notifyDataSetChanged();
		isLoading = false;
	}

	class PaginationAdapter extends BaseAdapter {

		List<News> newsItems;

		public PaginationAdapter(List<News> newsitems) {
			this.newsItems = newsitems;
		}

		public int getCount() {
			return newsItems==null?0:newsItems.size();
		}

		public Object getItem(int position) {
			return newsItems.get(position);
		}

		public long getItemId(int position) {
			return position;
		}

		public void addNewsItem(News newsitem) {
			newsItems.add(newsitem);
		}

		public View getView(int position, View convertView, ViewGroup parent) {
			if (convertView == null) {
				convertView = getLayoutInflater().inflate(R.layout.list_item,
						null);
			}
			// 新闻标题
			TextView tvTitle = (TextView) convertView
					.findViewById(R.id.newstitle);
			tvTitle.setText(newsItems.get(position).getTitle());
			// 新闻内容
			TextView tvContent = (TextView) convertView
					.findViewById(R.id.newscontent);
			tvContent.setText(newsItems.get(position).getContent());

			return convertView;
		}
	}
}

demo源码下载：源码下载

android Listview分批加载+自动加载（附源码下载）,布布扣,bubuko.com

android Listview分批加载+自动加载（附源码下载）

标签：android   listview   

原文地址：http://blog.csdn.net/u011494050/article/details/25516403