android widget

https://developer.android.com/reference/android/support/v4/widget/SwipeRefreshLayout.html

效果是这样的：

上个代码吧，使用比较简单：

package com.ali.yunos.androiddemo_n.activities;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.support.v4.widget.SwipeRefreshLayout;import android.widget.ArrayAdapter;import android.widget.ListView;import com.ali.yunos.androiddemo_n.R;import java.util.ArrayList;import java.util.List;import java.util.Random;public class SwipeRefreshActivity extends Activity {    private SwipeRefreshLayout mSwipeLayout;    private ListView mLV;    private List<String> mData;    private ArrayAdapter<String> mAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_swipe_refresh);        mSwipeLayout = (SwipeRefreshLayout)findViewById(R.id.sample_swipe);        mLV = (ListView)findViewById(R.id.swipe_listview);                initData();        mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mData);        mLV.setAdapter(mAdapter);        mSwipeLayout.setColorSchemeResources(android.R.color.holo_blue_bright, android.R.color.holo_green_light, android.R.color.holo_orange_light, android.R.color.holo_red_light);        mSwipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                new Handler().postDelayed(new Runnable() {                    @Override                    public void run() {                        mData.add(0, "添加新的item" + new Random().nextInt());                        mAdapter.notifyDataSetChanged();                        //停止刷新动画                        mSwipeLayout.setRefreshing(false);                    }                }, 3000);            }        });    }    private void initData() {        mData = new ArrayList<String>();        for (int i = 0; i < 50; i++) {            mData.add("Item#" + i);        }    }}

布局文件：

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

注意 SwipeRefreshLayout套在ListView外面，目前支持ListView和GridView。

To add the swipe to refresh widget to an existing app, add SwipeRefreshLayout as the parent of a single ListView or GridView. Remember that SwipeRefreshLayout only supports a single ListViewor GridView child.

然后监听swipe动作做出响应。