android使用SwipeRefreshLayout实现ListView下拉刷新上拉加载

<?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:id="@+id/srfl">   <ListView   android:layout_width="match_parent"   android:layout_height="match_parent"   android:id="@+id/listview" /> </android.support.v4.widget.SwipeRefreshLayout> 

public class MainActivity extends Activity {  private ListView mListView;  private SwipeRefreshLayout swipeRefreshLayout;  private List<String> stringList=new ArrayList<>();  private ArrayAdapter<String> adapter;  @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.activity_main);      for (int x=0 ; x<16;x++){    stringList.add("新浪微博：搏击爱好者Z"+"---"+x);   }   initView();  }   private void initView() {   swipeRefreshLayout= (SwipeRefreshLayout) findViewById(R.id.srfl);   //设置进度圈的大小;(这里面只有两个值SwipeRefreshLayout.LARGE和DEFAULT，后者是默认效果)   swipeRefreshLayout.setSize(SwipeRefreshLayout.LARGE);   //设置进度圈的背景色。这里随便给他设置了一个颜色：浅绿色   swipeRefreshLayout.setProgressBackgroundColorSchemeColor(Color.CYAN);   //设置进度动画的颜色。这里面最多可以指定四个颜色，我这也是随机设置的，大家知道怎么用就可以了   swipeRefreshLayout.setColorSchemeResources(android.R.color.holo_orange_dark     ,android.R.color.holo_blue_dark     ,android.R.color.holo_red_dark     ,android.R.color.widget_edittext_dark);   mListView= (ListView) findViewById(R.id.listview);   adapter = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_list_item_1, stringList);   mListView.setAdapter(adapter);    //设置手势滑动监听器   swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {    public void onRefresh() {     //发送一个延时1秒的handler信息     handler.sendEmptyMessageDelayed(199,1000);    }   });    //给listview设置一个滑动的监听   mListView.setOnScrollListener(new AbsListView.OnScrollListener() {    //当滑动状态发生改变的时候执行    public void onScrollStateChanged(AbsListView view, int scrollState) {     switch (scrollState){      //当不滚动的时候      case AbsListView.OnScrollListener.SCROLL_STATE_IDLE:        //判断是否是最底部       if(view.getLastVisiblePosition()==(view.getCount())-1){        for(int x=0;x<5;x++){         stringList.add(stringList.size(),"魔兽世界"+x);        }        adapter.notifyDataSetChanged();       }       break;     }    }    //正在滑动的时候执行    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {    }   });  }   private Handler handler=new Handler(){   @Override   public void handleMessage(Message msg) {    if(msg.what==199){     stringList.add(0,"英雄联盟");     adapter.notifyDataSetChanged();     //设置组件的刷洗状态；false代表关闭     swipeRefreshLayout.setRefreshing(false);    }   }  }; }