SwipeRefreshLayout下拉刷新

1.设置动画颜色：swipeRefreshLayout.setColorSchemeColors(colors);//可变长参数

2.下拉刷新事件监听：swipeRefreshLayout.setRefreshListener(refreshListener);

3.停止刷新：swipeRefreshLayout.setRefreshing(false);

4.使用时，SwipeRefreshLayout作为父容器将ListView包裹起来

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

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

public class MainActivity extends AppCompatActivity {

    private List<String> list;
    private SwipeRefreshLayout refreshLayout;
    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            //刷新完成，取消刷新动画
            refreshLayout.setRefreshing(false);
            adapter.notifyDataSetChanged();
        }
    };
    private ArrayAdapter<String> adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initData();
        ListView listView = (ListView) findViewById(R.id.lv);
        refreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_refresh_layout);
        refreshLayout.setColorSchemeColors(Color.RED, Color.GREEN, Color.BLUE);
        //设置下拉刷新监听
        refreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        SystemClock.sleep(3000);
                        list.add(0, "李四");
                        mHandler.sendEmptyMessage(0);
                    }
                }).start();
            }
        });
        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list);
        listView.setAdapter(adapter);
    }

    private void initData() {
        list = new ArrayList<>();
        for (int i = 0; i < 30; i++) {
            list.add("张三:" + i);
        }
    }
}