2、Android自己的下拉刷新SwipeRefreshLayout--样式2

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

 import java.lang.reflect.Field;
 import java.util.ArrayList;
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.os.Bundle;
 import android.os.Handler;
 import android.support.v4.widget.SwipeRefreshLayout;
 import android.util.DisplayMetrics;
 import android.view.View;
 import android.view.ViewTreeObserver;
 import android.widget.ListView;

 public class MainActivity extends Activity implements
         SwipeRefreshLayout.OnRefreshListener {

     private SwipeRefreshLayout swipeLayout;
     private ListView listView;
     private ListViewAdapter adapter;
     private ArrayList<JavaBean> list;
     private int number = 0;

     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         swipeLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_container);
         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);

         ViewTreeObserver vto = swipeLayout.getViewTreeObserver();
         vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
             @SuppressLint("NewApi")
             public void onGlobalLayout() {
                 final DisplayMetrics metrics = getResources()
                         .getDisplayMetrics();
                 Float mDistanceToTriggerSync = Math.min(
                         ((View) swipeLayout.getParent()).getHeight() * 0.6f,
                         500 * metrics.density);
                 try {
                     Field field = SwipeRefreshLayout.class
                             .getDeclaredField("mDistanceToTriggerSync");
                     field.setAccessible(true);
                     field.setFloat(swipeLayout, mDistanceToTriggerSync);
                 } catch (Exception e) {
                     e.printStackTrace();
                 }

                 ViewTreeObserver obs = swipeLayout.getViewTreeObserver();
                 obs.removeOnGlobalLayoutListener(this);
             }
         });

         list = new ArrayList<JavaBean>();
         list.add(new JavaBean(0, "Item0"));
         listView = (ListView) findViewById(R.id.list);
         adapter = new ListViewAdapter(this, list);
         listView.setAdapter(adapter);
     }

     public void onRefresh() {
         new Handler().postDelayed(new Runnable() {
             public void run() {
                 swipeLayout.setRefreshing(false);
                 list.add(new JavaBean(++number, "Item" + number));
                 adapter.notifyDataSetChanged();
             }
         }, 1000);
     }
 }