google推出的SwipeRefreshLayout下拉刷新用法

SwipeRefreshLayout是Google在support v4 19.1版本的library更新的一个下拉刷新组件,实现刷新效果更方便。

使用如下:

1.先下载android-support-v4.jar最新版本,之前的版本是没有SwipeRefreshLayout下拉刷新控件的,如果已经更新,此步骤可省略。

google推出的SwipeRefreshLayout下拉刷新用法_第1张图片

2.在xml文件中引用android.support.v4.widget.SwipeRefreshLayout控件,在里面可以放置任何一个控件,例如ListView,gridview等。

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipe_refresh"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <ListView
            android:id="@+id/listview"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >
        </ListView>
    </android.support.v4.widget.SwipeRefreshLayout>

3.在java文件中使用。

/**
 * 主页
 * @author w.w
 */
public class MainActivity extends Activity implements SwipeRefreshLayout.OnRefreshListener {

	/**
	 * 给ListView添加下拉刷新
	 */
	private SwipeRefreshLayout swipeLayout;
	
	/**
	 * ListView
	 */
	private ListView listView;
	
	/**
	 * ListView适配器
	 */
	private ListViewAdapter adapter;
	
	private List<ItemInfo> infoList;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		swipeLayout = (SwipeRefreshLayout) this.findViewById(R.id.swipe_refresh);
		swipeLayout.setOnRefreshListener(this);
		
		// 顶部刷新的样式
		swipeLayout.setColorScheme(android.R.color.holo_red_light, android.R.color.holo_green_light,
				android.R.color.holo_blue_bright, android.R.color.holo_orange_light);

		infoList = new ArrayList<ItemInfo>();
		ItemInfo info = new ItemInfo();
		info.setName("coin");
		infoList.add(info);
		listView = (ListView) this.findViewById(R.id.listview);
		adapter = new ListViewAdapter(this, infoList);
		listView.setAdapter(adapter);
	}

	public void onRefresh() {
		new Handler().postDelayed(new Runnable() {
			public void run() {
				swipeLayout.setRefreshing(false);
				ItemInfo info = new ItemInfo();
				info.setName("coin-refresh");
				infoList.add(info);
				adapter.notifyDataSetChanged();
			}
		}, 500);
	}
}

demo下载地址:http://download.csdn.net/detail/xue_wei_love/7135315

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