Android下拉刷新ListView——RTPullListView

下拉刷新在越来越多的App中使用，已经形成一种默认的用户习惯，遇到列表显示的内容时，用户已经开始习惯性的拉拉。在交互习惯上已经形成定性。之前在我的文章《 IOS学习笔记34—EGOTableViewPullRefresh实现下拉刷新》中介绍过如何在IOS上实现下拉刷新的功能。今天主要介绍下在Android上实现下拉刷新的Demo，下拉控件参考自Github上开源项目 PullToRefresh，并做简单修改。最终效果如下：

工程结构如下：

使用过程中可以对下拉显示效果进行自定义，如果要修改顶部下拉显示，则只需修改pulllist_head.xml即可，修改底部获取更多则修改list_footview.xml即可。

接下来是在Activity中使用：

/**
 * PullListView
 * @author Ryan
 *
 */
public class RTPullListViewActivity extends Activity {
	private static final int INTERNET_FAILURE = -1;
	private static final int LOAD_SUCCESS = 1;
	private static final int LOAD_MORE_SUCCESS = 3;
	private static final int NO_MORE_INFO = 4;
	private static final int LOAD_NEW_INFO = 5;
	
	private RTPullListView pullListView;
	private ProgressBar moreProgressBar;
	
	private List<String> dataList;
	private ArrayAdapter<String> adapter;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        pullListView = (RTPullListView) this.findViewById(R.id.pullListView);
        
        dataList = new ArrayList<String>();
		for (int i = 0; i < 5; i++) {
			dataList.add("Item data "+i);
		}
		adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, dataList);
		pullListView.setAdapter(adapter);
		
		//添加listview底部获取更多按钮（可自定义）
        LayoutInflater inflater = LayoutInflater.from(this);
		View view = inflater.inflate(R.layout.list_footview, null);
		RelativeLayout footerView =(RelativeLayout) view.findViewById(R.id.list_footview);
		moreProgressBar = (ProgressBar) view.findViewById(R.id.footer_progress);
		pullListView.addFooterView(footerView);
		
		//下拉刷新监听器
		pullListView.setonRefreshListener(new OnRefreshListener() {
			
			@Override
			public void onRefresh() {
				new Thread(new Runnable() {
					
					@Override
					public void run() {
						try {
							//模拟数据刷新
							Thread.sleep(2000);
							dataList.clear();
							for (int i = 0; i < 5; i++) {
								dataList.add("Item data "+i);
							}
							myHandler.sendEmptyMessage(LOAD_NEW_INFO);
						} catch (InterruptedException e) {
							e.printStackTrace();
						}
					}
				}).start();
			}
		});
		
		//获取更多监听器
		footerView.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {

				moreProgressBar.setVisibility(View.VISIBLE);
				
				new Thread(new Runnable() {
					
					@Override
					public void run() {
						try {
							//模拟数据刷新
							Thread.sleep(2000);
							for (int i = 0; i < 5; i++) {
								dataList.add("New item data "+i);
							}
							myHandler.sendEmptyMessage(LOAD_MORE_SUCCESS);
						} catch (InterruptedException e) {
							e.printStackTrace();
						}
					}
				}).start();
			}
		});
    }
    
    //结果处理
    private Handler myHandler = new Handler(){

		@Override
		public void handleMessage(Message msg) {
			super.handleMessage(msg);
			switch (msg.what) {
			case LOAD_MORE_SUCCESS:
				moreProgressBar.setVisibility(View.GONE);
				adapter.notifyDataSetChanged();
				pullListView.setSelectionfoot();
				break;

			case LOAD_NEW_INFO:
				adapter.notifyDataSetChanged();
				pullListView.onRefreshComplete();
				break;
			default:
				break;
			}
		}
    	
    };
}

具体使用及修改请参考Demo源码： 源码下载

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