谷歌自己的下拉刷新组件解析

SwipeRefreshLayout
public class SwipeRefreshLayout 
extends ViewGroup implements NestedScrollingParent, NestedScrollingChild


java.lang.Object
   ↳ android.view.View
    ↳ android.view.ViewGroup

    ↳ android.support.v4.widget.SwipeRefreshLayout

API doc：http://developer.android.com/reference/android/support/v4/widget/SwipeRefreshLayout.html

主要方法

setOnRefreshListener(OnRefreshListener): 为布局添加一个Listener

setRefreshing(boolean): 显示或隐藏刷新进度条

isRefreshing(): 检查是否处于刷新状态

setColorScheme(): 设置进度条的颜色主题，最多能设置四种

布局：在最外层加上SwipeRefreshLayout，他的child是可滚动的view即可，如ScrollView或者ListView

在代码中使用：

public class MainActivity extends ActionBarActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		//requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);
		
		final TextView mTextView = (TextView)findViewById(R.id.refresh);
		final SwipeRefreshLayout mSwipeRefreshLayout = (SwipeRefreshLayout)findViewById(R.id.swipe_refresh_layout);
		mSwipeRefreshLayout.setColorSchemeResources(android.R.color.holo_blue_bright, android.R.color.holo_blue_light, android.R.color.holo_green_light, android.R.color.holo_orange_light);
		mSwipeRefreshLayout.setOnRefreshListener(new OnRefreshListener(){
							@Override
			               public void onRefresh() {
				  			mTextView.setText("正在刷新");
			                 // TODO Auto-generated method stub
				  			//boolean android.os.Handler.postDelayed(Runnable r, long delayMillis)
			                  new Handler().postDelayed(new Runnable() {
			                     
			                     @Override
			                    public void run() {
			                         // TODO Auto-generated method stub
			                    	 mTextView.setText("刷新完成");
			                    	 mSwipeRefreshLayout.setRefreshing(false);
			                     }
			                 }, 5000);
			            }
		});
	}

	
}

Tanks to:stormzhang