Google官方的下拉刷新组建

activity代码实现：

/**
* The SwipeRefreshLayout should be used whenever the user
* can refresh the contents of a view via a vertical swipe gesture.
*
*/
public class MainActivity extends Activity implements
SwipeRefreshLayout.OnRefreshListener {
private SwipeRefreshLayout swipeLayout;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

swipeLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_container);
//Classes that wish to be notified when the swipe gesture correctly
//triggers a refresh should implement this interface.
swipeLayout.setOnRefreshListener(this);
swipeLayout.setColorScheme(android.R.color.holo_blue_bright,
android.R.color.holo_green_light,
android.R.color.holo_orange_light,
android.R.color.holo_red_light);
}

/**
* SwipeRefreshLayout.OnRefreshListener:Classes that wish to be notified when the swipe
* gesture correctly triggers a refresh should implement this interface.
* And trigger this function;
*/
@Override
public void onRefresh() {

new Handler().postDelayed(new Runnable() {
@Override
public void run() {
//Notify the widget that refresh state has changed.
swipeLayout.setRefreshing(false);

}
}, 3000);
}

}

xml实现activity_main.xml：

<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/swipe_container"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent" >

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:gravity="center"
android:text="@string/hello_world" />
</ScrollView>

</android.support.v4.widget.SwipeRefreshLayout>