Android PullToRefresh （ListView GridView 下拉刷新）使用详解

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转载请标明出处：http://blog.csdn.net/lmj623565791/article/details/38238749，本文出自：【张鸿洋的博客】

群里一哥们今天聊天偶然提到这个git hub上的控件：pull-to-refresh ，有兴趣的看下，例子中的功能极其强大，支持很多控件。本篇博客详细给大家介绍下ListView和GridView利用pull-to-rerfesh 实现下拉刷新和上拉加载更多。

1、ListView下拉刷新快速入门

pull-to-refresh对ListView进行了封装，叫做：PullToRefreshListView，用法和listview没什么区别，下面看demo.

布局文件：

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<RelativeLayout xmlns:android=”http://schemas.android.com/apk/res/android”
xmlns:tools=”http://schemas.android.com/tools”
android:layout_width=“match_parent”
android:layout_height=“match_parent” >
<com.handmark.pulltorefresh.library.PullToRefreshListView
xmlns:ptr=”http://schemas.android.com/apk/res-auto”
android:id=“@+id/pull_refresh_list”
android:layout_width=“fill_parent”
android:layout_height=“fill_parent”
android:cacheColorHint=“#00000000”
android:divider=“#19000000”
android:dividerHeight=“4dp”
android:fadingEdge=“none”
android:fastScrollEnabled=“false”
android:footerDividersEnabled=“false”
android:headerDividersEnabled=“false”
android:smoothScrollbar=“true” >
</com.handmark.pulltorefresh.library.PullToRefreshListView>
</RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" >

&lt;com.handmark.pulltorefresh.library.PullToRefreshListView    xmlns:ptr="http://schemas.android.com/apk/res-auto"    android:id="@+id/pull_refresh_list"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:cacheColorHint="#00000000"    android:divider="#19000000"    android:dividerHeight="4dp"    android:fadingEdge="none"    android:fastScrollEnabled="false"    android:footerDividersEnabled="false"    android:headerDividersEnabled="false"    android:smoothScrollbar="true" &gt;&lt;/com.handmark.pulltorefresh.library.PullToRefreshListView&gt;

</RelativeLayout>
声明了一个PullToRefreshListView，里面所有的属性都是ListView的，没有任何其他属性，当然了PullToRefreshListView也提供了很多配置的属性，后面会详细介绍。

Activity的代码:

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package com.example.zhy_pulltorefreash_chenyoca;
import java.util.LinkedList;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.format.DateUtils;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
public class PullToRefreshListActivity extends Activity
{
private LinkedList<String> mListItems;
/*
上拉刷新的控件
*/
private PullToRefreshListView mPullRefreshListView;
private ArrayAdapter<String> mAdapter;
private int mItemCount = 9;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 得到控件
mPullRefreshListView = (PullToRefreshListView) findViewById(R.id.pull_refresh_list);
//初始化数据
initDatas();
//设置适配器
mAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, mListItems);
mPullRefreshListView.setAdapter(mAdapter);
// 设置监听事件
mPullRefreshListView
.setOnRefreshListener(new OnRefreshListener<ListView>()
{
@Override
public void onRefresh(
PullToRefreshBase<ListView> refreshView)
{
String label = DateUtils.formatDateTime(
getApplicationContext(),
System.currentTimeMillis(),
DateUtils.FORMAT_SHOW_TIME
| DateUtils.FORMAT_SHOW_DATE
| DateUtils.FORMAT_ABBREV_ALL);
// 显示最后更新的时间
refreshView.getLoadingLayoutProxy()
.setLastUpdatedLabel(label);
// 模拟加载任务
new GetDataTask().execute();
}
});
}
private void initDatas()
{
// 初始化数据和数据源
mListItems = new LinkedList<String>();
for (int i = 0; i < mItemCount; i++)
{
mListItems.add(”“ + i);
}
}
private class GetDataTask extends AsyncTask<Void, Void, String>
{
@Override
protected String doInBackground(Void… params)
{
try
{
Thread.sleep(2000);
} catch (InterruptedException e)
{
}
return “” + (mItemCount++);
}
@Override
protected void onPostExecute(String result)
{
mListItems.add(result);
mAdapter.notifyDataSetChanged();
// Call onRefreshComplete when the list has been refreshed.
mPullRefreshListView.onRefreshComplete();
}
}
}

package com.example.zhy_pulltorefreash_chenyoca;import java.util.LinkedList;
import android.app.Activity; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.text.format.DateUtils; 
import android.widget.ArrayAdapter; 
import android.widget.ListView;
import com.handmark.pulltorefresh.library.PullToRefreshBase; 
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener; 
import com.handmark.pulltorefresh.library.PullToRefreshListView;
public class PullToRefreshListActivity extends Activity 
{
private LinkedList&lt;String&gt; mListItems;/** * 上拉刷新的控件 */private PullToRefreshListView mPullRefreshListView;private ArrayAdapter&lt;String&gt; mAdapter;private int mItemCount = 9;@Overrideprotected void onCreate(Bundle savedInstanceState){    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    // 得到控件    mPullRefreshListView = (PullToRefreshListView) findViewById(R.id.pull_refresh_list);    //初始化数据    initDatas();    //设置适配器    mAdapter = new ArrayAdapter&lt;String&gt;(this,            android.R.layout.simple_list_item_1, mListItems);    mPullRefreshListView.setAdapter(mAdapter);    // 设置监听事件    mPullRefreshListView            .setOnRefreshListener(new OnRefreshListener&lt;ListView&gt;()            {                @Override                public void onRefresh(                        PullToRefreshBase&lt;ListView&gt; refreshView)                {                    String label = DateUtils.formatDateTime(                            getApplicationContext(),                            System.currentTimeMillis(),                            DateUtils.FORMAT_SHOW_TIME                                    | DateUtils.FORMAT_SHOW_DATE                                    | DateUtils.FORMAT_ABBREV_ALL);                    // 显示最后更新的时间                    refreshView.getLoadingLayoutProxy()                            .setLastUpdatedLabel(label);                    // 模拟加载任务                    new GetDataTask().execute();                }            });}private void initDatas(){    // 初始化数据和数据源    mListItems = new LinkedList&lt;String&gt;();    for (int i = 0; i &lt; mItemCount; i++)    {        mListItems.add("" + i);    }}private class GetDataTask extends AsyncTask&lt;Void, Void, String&gt;{    @Override    protected String doInBackground(Void... params)    {        try        {            Thread.sleep(2000);        } catch (InterruptedException e)        {        }        return "" + (mItemCount++);    }    @Override    protected void onPostExecute(String result)    {        mListItems.add(result);        mAdapter.notifyDataSetChanged();        // Call onRefreshComplete when the list has been refreshed.        mPullRefreshListView.onRefreshComplete();    }}
}

代码极其简单，得到PullToRefreshListView控件，然后像ListView一样设置数据集。当然了，我们有下拉刷新，所以必须设置下拉刷新的回调：

setOnRefreshListener(new OnRefreshListener<ListView>(){}

我们在回调中模拟了一个异步任务，加载了一个Item。

效果图：

下拉时，执行我们的GetDataTask任务，任务执行完成后在onPostExecute中调用mPullRefreshListView.onRefreshComplete();完成刷新。

是不是分分钟实现下拉刷新。当然了，你可能会有疑问，下拉刷新的指示器上的文字可以自定义吗？那个图片可以换成箭头吗？说好的上拉加载更多呢？后面会一一添加~

2、添加上拉加载更多

如过希望实现上拉加载更多，那么首先需要在布局文件的声明属性中添加一个属性，用于指定目前的下拉模式：

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<RelativeLayout xmlns:android=”http://schemas.android.com/apk/res/android”
xmlns:tools=”http://schemas.android.com/tools”
android:layout_width=“match_parent”
android:layout_height=“match_parent” >
<com.handmark.pulltorefresh.library.PullToRefreshListView
xmlns:ptr=”http://schemas.android.com/apk/res-auto”
android:id=“@+id/pull_refresh_list”
android:layout_width=“fill_parent”
android:layout_height=“fill_parent”
android:cacheColorHint=“#00000000”
android:divider=“#19000000”
android:dividerHeight=“4dp”
android:fadingEdge=“none”
android:fastScrollEnabled=“false”
android:footerDividersEnabled=“false”
android:headerDividersEnabled=“false”
android:smoothScrollbar=“true”
ptr:ptrMode=“both” >
</com.handmark.pulltorefresh.library.PullToRefreshListView>
</RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" >&lt;com.handmark.pulltorefresh.library.PullToRefreshListView    xmlns:ptr="http://schemas.android.com/apk/res-auto"    android:id="@+id/pull_refresh_list"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:cacheColorHint="#00000000"    android:divider="#19000000"    android:dividerHeight="4dp"    android:fadingEdge="none"    android:fastScrollEnabled="false"    android:footerDividersEnabled="false"    android:headerDividersEnabled="false"    android:smoothScrollbar="true"    ptr:ptrMode="both" &gt;&lt;/com.handmark.pulltorefresh.library.PullToRefreshListView&gt;
</RelativeLayout>

我们添加了一个属性：ptr:ptrMode=”both” ，意思：上拉和下拉都支持。

可选值为：disabled（禁用下拉刷新），pullFromStart（仅支持下拉刷新），pullFromEnd（仅支持上拉刷新），both（二者都支持），manualOnly（只允许手动触发）

当然了，如果你不喜欢在布局文件中指定，完全可以使用代码设置，在onCreate里面写：mPullRefreshListView.setMode(Mode.BOTH);//设置你需要的模式

设置了模式为双向都支持，当然必须为上拉和下拉分别设置回调，请看下面的代码：

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package com.example.zhy_pulltorefreash_chenyoca;
import java.util.LinkedList;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.format.DateUtils;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
public class PullToRefreshListActivity extends Activity
{
private LinkedList<String> mListItems;
/*
上拉刷新的控件
*/
private PullToRefreshListView mPullRefreshListView;
private ArrayAdapter<String> mAdapter;
private int mItemCount = 9;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 得到控件
mPullRefreshListView = (PullToRefreshListView) findViewById(R.id.pull_refresh_list);
mPullRefreshListView.setMode(Mode.BOTH);
// 初始化数据
initDatas();
// 设置适配器
mAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, mListItems);
mPullRefreshListView.setAdapter(mAdapter);
mPullRefreshListView
.setOnRefreshListener(new OnRefreshListener2<ListView>()
{
@Override
public void onPullDownToRefresh(
PullToRefreshBase<ListView> refreshView)
{
Log.e(”TAG”, “onPullDownToRefresh”);
//这里写下拉刷新的任务
new GetDataTask().execute();
}
@Override
public void onPullUpToRefresh(
PullToRefreshBase<ListView> refreshView)
{
Log.e(”TAG”, “onPullUpToRefresh”);
//这里写上拉加载更多的任务
new GetDataTask().execute();
}
});
}
private void initDatas()
{
// 初始化数据和数据源
mListItems = new LinkedList<String>();
for (int i = 0; i < mItemCount; i++)
{
mListItems.add(”“ + i);
}
}
private class GetDataTask extends AsyncTask<Void, Void, String>
{
@Override
protected String doInBackground(Void… params)
{
try
{
Thread.sleep(2000);
} catch (InterruptedException e)
{
}
return “” + (mItemCount++);
}
@Override
protected void onPostExecute(String result)
{
mListItems.add(result);
mAdapter.notifyDataSetChanged();
// Call onRefreshComplete when the list has been refreshed.
mPullRefreshListView.onRefreshComplete();
}
}

package com.example.zhy_pulltorefreash_chenyoca;import java.util.LinkedList;
import android.app.Activity; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.text.format.DateUtils; 
import android.util.Log; 
import android.widget.ArrayAdapter; 
import android.widget.ListView;
import com.handmark.pulltorefresh.library.PullToRefreshBase; 
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode; 
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener; 
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2; 
import com.handmark.pulltorefresh.library.PullToRefreshListView;
public class PullToRefreshListActivity extends Activity 
{
private LinkedList&lt;String&gt; mListItems;/** * 上拉刷新的控件 */private PullToRefreshListView mPullRefreshListView;private ArrayAdapter&lt;String&gt; mAdapter;private int mItemCount = 9;@Overrideprotected void onCreate(Bundle savedInstanceState){    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    // 得到控件    mPullRefreshListView = (PullToRefreshListView) findViewById(R.id.pull_refresh_list);    mPullRefreshListView.setMode(Mode.BOTH);    // 初始化数据    initDatas();    // 设置适配器    mAdapter = new ArrayAdapter&lt;String&gt;(this,            android.R.layout.simple_list_item_1, mListItems);    mPullRefreshListView.setAdapter(mAdapter);    mPullRefreshListView            .setOnRefreshListener(new OnRefreshListener2&lt;ListView&gt;()            {                @Override                public void onPullDownToRefresh(                        PullToRefreshBase&lt;ListView&gt; refreshView)                {                    Log.e("TAG", "onPullDownToRefresh");                    //这里写下拉刷新的任务                    new GetDataTask().execute();                }                @Override                public void onPullUpToRefresh(                        PullToRefreshBase&lt;ListView&gt; refreshView)                {                    Log.e("TAG", "onPullUpToRefresh");                    //这里写上拉加载更多的任务                    new GetDataTask().execute();                }            });}private void initDatas(){    // 初始化数据和数据源    mListItems = new LinkedList&lt;String&gt;();    for (int i = 0; i &lt; mItemCount; i++)    {        mListItems.add("" + i);    }}private class GetDataTask extends AsyncTask&lt;Void, Void, String&gt;{    @Override    protected String doInBackground(Void... params)    {        try        {            Thread.sleep(2000);        } catch (InterruptedException e)        {        }        return "" + (mItemCount++);    }    @Override    protected void onPostExecute(String result)    {        mListItems.add(result);        mAdapter.notifyDataSetChanged();        // Call onRefreshComplete when the list has been refreshed.        mPullRefreshListView.onRefreshComplete();    }}</pre><br>和第一段的代码只有一个地方有区别，可能很难发现：<br>mPullRefreshListView.setOnRefreshListener(new OnRefreshListener2&lt;ListView&gt;(){});注意这里的接口类型是OnRefreshListener2，多了个2，和上面的不一样，这个接口包含两个方法，一个上拉回调，一个下拉回调。好了，这样我们就成功添加了上拉与下拉，并且分别可以控制其回调代码。<p></p><p>效果图：</p><p><img src="http://img.blog.csdn.net/20140728233709140" alt=""><br></p><p>咋样，是不是也很简单~注:如果你的上拉和下拉需求是执行一样的代码，那么你可以继续注册OnRefreshListener接口，上拉和下拉都会执行同一个方法。</p><p>接下来介绍如何使用带下拉刷新和加载更多的的GridView和自定义样式~</p><h5><a name="t2" target="_blank"></a><span style="font-size:14px;">3、带下拉和上拉的GridView (&nbsp;PullToRefreshGridView&nbsp;)</span></h5><p>同样的pull-to-refresh把GridView封装为：PullToRefreshGridView 。用法和PullToRefreshListView一摸一样~</p><p>首先看主布局文件：</p><p></p><div class="dp-highlighter bg_html"><div class="bar"><div class="tools"><b>[html]</b> <a href="#" class="ViewSource" title="view plain" onclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a><span data-mod="popu_168"> <a href="#" class="CopyToClipboard" title="copy" onclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 463px; top: 7693px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_5" src="http://static.blog.csdn.net/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_5" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=5&amp;width=18&amp;height=18" wmode="transparent"></div></span><span data-mod="popu_169"> <a href="#" class="PrintSource" title="print" onclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a></span><a href="#" class="About" title="?" onclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><span><span class="tag">&lt;?</span><span class="tag-name">xml</span><span>&nbsp;</span><span class="attribute">version</span><span>=</span><span class="attribute-value">"1.0"</span><span>&nbsp;</span><span class="attribute">encoding</span><span>=</span><span class="attribute-value">"utf-8"</span><span class="tag">?&gt;</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span><span class="tag">&lt;</span><span class="tag-name">LinearLayout</span><span>&nbsp;</span><span class="attribute">xmlns:android</span><span>=</span><span class="attribute-value">"http://schemas.android.com/apk/res/android"</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:layout_width</span><span>=</span><span class="attribute-value">"fill_parent"</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:layout_height</span><span>=</span><span class="attribute-value">"fill_parent"</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:orientation</span><span>=</span><span class="attribute-value">"vertical"</span><span>&nbsp;</span><span class="tag">&gt;</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="comments">&lt;!--&nbsp;The&nbsp;PullToRefreshGridView&nbsp;replaces&nbsp;a&nbsp;standard&nbsp;GridView&nbsp;widget.&nbsp;--&gt;</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">&lt;</span><span class="tag-name">com.handmark.pulltorefresh.library.PullToRefreshGridView</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">xmlns:ptr</span><span>=</span><span class="attribute-value">"http://schemas.android.com/apk/res-auto"</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:id</span><span>=</span><span class="attribute-value">"@+id/pull_refresh_grid"</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:layout_width</span><span>=</span><span class="attribute-value">"fill_parent"</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:layout_height</span><span>=</span><span class="attribute-value">"fill_parent"</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:columnWidth</span><span>=</span><span class="attribute-value">"100dp"</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:gravity</span><span>=</span><span class="attribute-value">"center_horizontal"</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:horizontalSpacing</span><span>=</span><span class="attribute-value">"1dp"</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:numColumns</span><span>=</span><span class="attribute-value">"auto_fit"</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:stretchMode</span><span>=</span><span class="attribute-value">"columnWidth"</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">android:verticalSpacing</span><span>=</span><span class="attribute-value">"1dp"</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">ptr:ptrDrawable</span><span>=</span><span class="attribute-value">"@drawable/ic_launcher"</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">ptr:ptrMode</span><span>=</span><span class="attribute-value">"both"</span><span>&nbsp;</span><span class="tag">/&gt;</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;</span></li><li class="alt"><span><span class="tag">&lt;/</span><span class="tag-name">LinearLayout</span><span class="tag">&gt;</span><span>&nbsp;&nbsp;</span></span></li></ol></div><pre code_snippet_id="437610" snippet_file_name="blog_20140729_5_1505969" name="code" class="html" style="display: none;">&lt;?xml version="1.0" encoding="utf-8"?&gt;
<LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android” 
    android:layout_width=”fill_parent” 
    android:layout_height=”fill_parent” 
    android:orientation=”vertical” >
&lt;!-- The PullToRefreshGridView replaces a standard GridView widget. --&gt;&lt;com.handmark.pulltorefresh.library.PullToRefreshGridView    xmlns:ptr="http://schemas.android.com/apk/res-auto"    android:id="@+id/pull_refresh_grid"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:columnWidth="100dp"    android:gravity="center_horizontal"    android:horizontalSpacing="1dp"    android:numColumns="auto_fit"    android:stretchMode="columnWidth"    android:verticalSpacing="1dp"    ptr:ptrDrawable="@drawable/ic_launcher"    ptr:ptrMode="both" /&gt;
</LinearLayout>

PullToRefreshGridView 的item的布局文件：

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<?xml version=“1.0” encoding=“utf-8”?>
<TextView xmlns:android=”http://schemas.android.com/apk/res/android”
android:id=“@+id/id_grid_item_text”
android:layout_width=“100dp”
android:gravity=“center”
android:textColor=“#ffffff”
android:textSize=“16sp”
android:background=“#000000”
android:layout_height=“100dp” />

<?xml version="1.0" encoding="utf-8"?> 
<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/id_grid_item_text" 
    android:layout_width="100dp" 
    android:gravity="center" 
    android:textColor="#ffffff" 
    android:textSize="16sp" 
    android:background="#000000" 
    android:layout_height="100dp" />

接下来就是Activity的代码了：

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public class PullToRefreshGridActivity extends Activity
{
private LinkedList<String> mListItems;
private PullToRefreshGridView mPullRefreshListView;
private ArrayAdapter<String> mAdapter;
private int mItemCount = 10;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ptr_grid);
// 得到控件
mPullRefreshListView = (PullToRefreshGridView) findViewById(R.id.pull_refresh_grid);
// 初始化数据和数据源
initDatas();
mAdapter = new ArrayAdapter<String>(this, R.layout.grid_item,
R.id.id_grid_item_text, mListItems);
mPullRefreshListView.setAdapter(mAdapter);
mPullRefreshListView
.setOnRefreshListener(new OnRefreshListener2<GridView>()
{
@Override
public void onPullDownToRefresh(
PullToRefreshBase<GridView> refreshView)
{
Log.e(”TAG”, “onPullDownToRefresh”); // Do work to
String label = DateUtils.formatDateTime(
getApplicationContext(),
System.currentTimeMillis(),
DateUtils.FORMAT_SHOW_TIME
| DateUtils.FORMAT_SHOW_DATE
| DateUtils.FORMAT_ABBREV_ALL);
// Update the LastUpdatedLabel
refreshView.getLoadingLayoutProxy()
.setLastUpdatedLabel(label);
new GetDataTask().execute();
}
@Override
public void onPullUpToRefresh(
PullToRefreshBase<GridView> refreshView)
{
Log.e(”TAG”, “onPullUpToRefresh”); // Do work to refresh
// the list here.
new GetDataTask().execute();
}
});
}
private void initDatas()
{
mListItems = new LinkedList<String>();
for (int i = 0; i < mItemCount; i++)
{
mListItems.add(i + ”“);
}
}
private class GetDataTask extends AsyncTask<Void, Void, Void>
{
@Override
protected Void doInBackground(Void… params)
{
try
{
Thread.sleep(2000);
} catch (InterruptedException e)
{
}
return null;
}
@Override
protected void onPostExecute(Void result)
{
mListItems.add(”“ + mItemCount++);
mAdapter.notifyDataSetChanged();
// Call onRefreshComplete when the list has been refreshed.
mPullRefreshListView.onRefreshComplete();
}
}

public class PullToRefreshGridActivity extends Activity 
{ 
    private LinkedList<String> mListItems; 
    private PullToRefreshGridView mPullRefreshListView; 
    private ArrayAdapter<String> mAdapter;private int mItemCount = 10;@Overrideprotected void onCreate(Bundle savedInstanceState){    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_ptr_grid);    // 得到控件    mPullRefreshListView = (PullToRefreshGridView) findViewById(R.id.pull_refresh_grid);    // 初始化数据和数据源    initDatas();    mAdapter = new ArrayAdapter&lt;String&gt;(this, R.layout.grid_item,            R.id.id_grid_item_text, mListItems);    mPullRefreshListView.setAdapter(mAdapter);    mPullRefreshListView            .setOnRefreshListener(new OnRefreshListener2&lt;GridView&gt;()            {                @Override                public void onPullDownToRefresh(                        PullToRefreshBase&lt;GridView&gt; refreshView)                {                    Log.e("TAG", "onPullDownToRefresh"); // Do work to                    String label = DateUtils.formatDateTime(                            getApplicationContext(),                            System.currentTimeMillis(),                            DateUtils.FORMAT_SHOW_TIME                                    | DateUtils.FORMAT_SHOW_DATE                                    | DateUtils.FORMAT_ABBREV_ALL);                    // Update the LastUpdatedLabel                    refreshView.getLoadingLayoutProxy()                            .setLastUpdatedLabel(label);                    new GetDataTask().execute();                }                @Override                public void onPullUpToRefresh(                        PullToRefreshBase&lt;GridView&gt; refreshView)                {                    Log.e("TAG", "onPullUpToRefresh"); // Do work to refresh                                                        // the list here.                    new GetDataTask().execute();                }            });}private void initDatas(){    mListItems = new LinkedList&lt;String&gt;();    for (int i = 0; i &lt; mItemCount; i++)    {        mListItems.add(i + "");    }}private class GetDataTask extends AsyncTask&lt;Void, Void, Void&gt;{    @Override    protected Void doInBackground(Void... params)    {        try        {            Thread.sleep(2000);        } catch (InterruptedException e)        {        }        return null;    }    @Override    protected void onPostExecute(Void result)    {        mListItems.add("" + mItemCount++);        mAdapter.notifyDataSetChanged();        // Call onRefreshComplete when the list has been refreshed.        mPullRefreshListView.onRefreshComplete();    }}</pre><br>基本上上例没有任何区别，直接看效果图吧：<p></p><p><img src="http://img.blog.csdn.net/20140728234545812" alt=""></p><p>效果还是不错的，如果你比较细心会发现，那个下拉刷新的转圈的图片咋变成机器人了，那是因为我在布局文件里面设置了：</p><p></p><div class="dp-highlighter bg_html"><div class="bar"><div class="tools"><b>[html]</b> <a href="#" class="ViewSource" title="view plain" onclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a><span data-mod="popu_168"> <a href="#" class="CopyToClipboard" title="copy" onclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 463px; top: 10649px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_8" src="http://static.blog.csdn.net/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_8" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=8&amp;width=18&amp;height=18" wmode="transparent"></div></span><span data-mod="popu_169"> <a href="#" class="PrintSource" title="print" onclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a></span><a href="#" class="About" title="?" onclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><span><span class="tag">&lt;</span><span class="tag-name">com.handmark.pulltorefresh.library.PullToRefreshGridView</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="attribute">ptr:ptrDrawable</span><span>=</span><span class="attribute-value">"@drawable/ic_launcher"</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;...&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="tag">/&gt;</span><span>&nbsp;&nbsp;</span></span></li></ol></div><pre code_snippet_id="437610" snippet_file_name="blog_20140729_8_1428739" name="code" class="html" style="display: none;"> &lt;com.handmark.pulltorefresh.library.PullToRefreshGridView    ptr:ptrDrawable="@drawable/ic_launcher"    ...    /&gt;</pre><br>当然了这是旋转的效果，一般常用的还有，一个箭头倒置的效果，其实也很简单，一个属性：<p></p><p>ptr:ptrAnimationStyle="flip"</p><p>去掉&nbsp;ptr:ptrDrawable="@drawable/ic_launcher"这个属性，如果你希望用下图默认的箭头，你也可以自定义。</p><p>添加后，箭头就是这个样子：</p><p><img src="http://img.blog.csdn.net/20140728235148314?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbG1qNjIzNTY1Nzkx/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt=""></p><p>ptr:ptrAnimationStyle的取值：flip（翻转动画）， rotate（旋转动画） 。&nbsp;</p><p>ptr:ptrDrawable则就是设置图标了。</p><p><br></p><h5><a name="t3" target="_blank"></a><span style="font-size:14px;">4、自定义下拉指示器文本内容等效果</span></h5><p></p><p>可以在初始化完成mPullRefreshListView后，通过mPullRefreshListView.getLoadingLayoutProxy()可以得到一个ILoadingLayout对象，这个对象可以设置各种指示器中的样式、文本等。</p><p></p><div class="dp-highlighter bg_java"><div class="bar"><div class="tools"><b>[java]</b> <a href="#" class="ViewSource" title="view plain" onclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a><span data-mod="popu_168"> <a href="#" class="CopyToClipboard" title="copy" onclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 461px; top: 11330px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_9" src="http://static.blog.csdn.net/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_9" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=9&amp;width=18&amp;height=18" wmode="transparent"></div></span><span data-mod="popu_169"> <a href="#" class="PrintSource" title="print" onclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a></span><a href="#" class="About" title="?" onclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt"><span><span>ILoadingLayout&nbsp;startLabels&nbsp;=&nbsp;mPullRefreshListView&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.getLoadingLayoutProxy();&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startLabels.setPullLabel(<span class="string">"你可劲拉，拉..."</span><span>);</span><span class="comment">//&nbsp;刚下拉时，显示的提示</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startLabels.setRefreshingLabel(<span class="string">"好嘞，正在刷新..."</span><span>);</span><span class="comment">//&nbsp;刷新时</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startLabels.setReleaseLabel(<span class="string">"你敢放，我就敢刷新..."</span><span>);</span><span class="comment">//&nbsp;下来达到一定距离时，显示的提示</span><span>&nbsp;&nbsp;</span></span></li></ol></div><pre code_snippet_id="437610" snippet_file_name="blog_20140729_9_8288412" name="code" class="java" style="display: none;">ILoadingLayout startLabels = mPullRefreshListView            .getLoadingLayoutProxy();    startLabels.setPullLabel("你可劲拉，拉...");// 刚下拉时，显示的提示    startLabels.setRefreshingLabel("好嘞，正在刷新...");// 刷新时    startLabels.setReleaseLabel("你敢放，我就敢刷新...");// 下来达到一定距离时，显示的提示</pre><br>如果你比较细心，会发现，前面我们设置上次刷新时间已经用到了：<p></p><p>// Update the LastUpdatedLabel<br>refreshView.getLoadingLayoutProxy().setLastUpdatedLabel(label);</p><p>现在的效果是：</p><p><img src="http://img.blog.csdn.net/20140728235848125?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbG1qNjIzNTY1Nzkx/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt=""></p><p><img src="http://img.blog.csdn.net/20140729000149789?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbG1qNjIzNTY1Nzkx/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt=""><br></p><p><img src="http://img.blog.csdn.net/20140728235902078?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbG1qNjIzNTY1Nzkx/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt=""><br></p><p>默认是上拉和下拉的字同时改变的，如果我希望单独改变呢？</p><p></p><div class="dp-highlighter bg_java"><div class="bar"><div class="tools"><b>[java]</b> <a href="#" class="ViewSource" title="view plain" onclick="dp.sh.Toolbar.Command('ViewSource',this);return false;" target="_blank">view plain</a><span data-mod="popu_168"> <a href="#" class="CopyToClipboard" title="copy" onclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;" target="_blank">copy</a><div style="position: absolute; left: 461px; top: 11880px; width: 18px; height: 18px; z-index: 99;"><embed id="ZeroClipboardMovie_10" src="http://static.blog.csdn.net/scripts/ZeroClipboard/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="18" height="18" name="ZeroClipboardMovie_10" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=10&amp;width=18&amp;height=18" wmode="transparent"></div></span><span data-mod="popu_169"> <a href="#" class="PrintSource" title="print" onclick="dp.sh.Toolbar.Command('PrintSource',this);return false;" target="_blank">print</a></span><a href="#" class="About" title="?" onclick="dp.sh.Toolbar.Command('About',this);return false;" target="_blank">?</a></div></div><ol start="1" class="dp-j"><li class="alt"><span><span class="keyword">private</span><span>&nbsp;</span><span class="keyword">void</span><span>&nbsp;initIndicator()&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;{&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ILoadingLayout&nbsp;startLabels&nbsp;=&nbsp;mPullRefreshListView&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.getLoadingLayoutProxy(<span class="keyword">true</span><span>,&nbsp;</span><span class="keyword">false</span><span>);&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startLabels.setPullLabel(<span class="string">"你可劲拉，拉..."</span><span>);</span><span class="comment">//&nbsp;刚下拉时，显示的提示</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startLabels.setRefreshingLabel(<span class="string">"好嘞，正在刷新..."</span><span>);</span><span class="comment">//&nbsp;刷新时</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startLabels.setReleaseLabel(<span class="string">"你敢放，我就敢刷新..."</span><span>);</span><span class="comment">//&nbsp;下来达到一定距离时，显示的提示</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ILoadingLayout&nbsp;endLabels&nbsp;=&nbsp;mPullRefreshListView.getLoadingLayoutProxy(&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">false</span><span>,&nbsp;</span><span class="keyword">true</span><span>);&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;endLabels.setPullLabel(<span class="string">"你可劲拉，拉2..."</span><span>);</span><span class="comment">//&nbsp;刚下拉时，显示的提示</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;endLabels.setRefreshingLabel(<span class="string">"好嘞，正在刷新2..."</span><span>);</span><span class="comment">//&nbsp;刷新时</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;endLabels.setReleaseLabel(<span class="string">"你敢放，我就敢刷新2..."</span><span>);</span><span class="comment">//&nbsp;下来达到一定距离时，显示的提示</span><span>&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span></li></ol></div><pre code_snippet_id="437610" snippet_file_name="blog_20140729_10_8320649" name="code" class="java" style="display: none;">private void initIndicator(){    ILoadingLayout startLabels = mPullRefreshListView            .getLoadingLayoutProxy(true, false);    startLabels.setPullLabel("你可劲拉，拉...");// 刚下拉时，显示的提示    startLabels.setRefreshingLabel("好嘞，正在刷新...");// 刷新时    startLabels.setReleaseLabel("你敢放，我就敢刷新...");// 下来达到一定距离时，显示的提示    ILoadingLayout endLabels = mPullRefreshListView.getLoadingLayoutProxy(            false, true);    endLabels.setPullLabel("你可劲拉，拉2...");// 刚下拉时，显示的提示    endLabels.setRefreshingLabel("好嘞，正在刷新2...");// 刷新时    endLabels.setReleaseLabel("你敢放，我就敢刷新2...");// 下来达到一定距离时，显示的提示}</pre><br>mPullRefreshListView.getLoadingLayoutProxy(true, false);接收两个参数，为true,false返回设置下拉的ILoadingLayout；为false,true返回设置上拉的。<br><p></p><h5><a name="t4" target="_blank"></a><span style="font-size:14px;">5、常用的一些属性</span></h5><p>当然了，pull-to-refresh在xml中还能定义一些属性：</p><p><strong>ptrMode，ptrDrawable，ptrAnimationStyle这三个上面已经介绍过。</strong><br></p><p>ptrRefreshableViewBackground 设置整个mPullRefreshListView的背景色<br></p><p>ptrHeaderBackground 设置下拉Header或者上拉Footer的背景色<br></p><p>ptrHeaderTextColor 用于设置Header与Footer中文本的颜色<br></p><p>ptrHeaderSubTextColor 用于设置Header与Footer中上次刷新时间的颜色<br></p><p>ptrShowIndicator如果为true会在mPullRefreshListView中出现icon，右上角和右下角，挺有意思的。</p><p>ptrHeaderTextAppearance ，&nbsp;ptrSubHeaderTextAppearance分别设置拉Header或者上拉Footer中字体的类型颜色等等。<br></p><p>ptrRotateDrawableWhilePulling当动画设置为rotate时，下拉是是否旋转。<br></p><p><strong>ptrScrollingWhileRefreshingEnabled刷新的时候，是否允许ListView或GridView滚动。觉得为true比较好。<br></strong></p><p><strong>ptrListViewExtrasEnabled 决定了Header，Footer以何种方式加入mPullRefreshListView，true为headView方式加入，就是滚动时刷新头部会一起滚动。</strong></p><p><strong>最后2个其实对于用户体验还是挺重要的，如果设置的时候考虑下~。</strong>其他的属性自己选择就好。</p><p>注：上述属性很多都可以代码控制，如果有需要可以直接mPullRefreshListView.set属性名 查看</p><p>以上为pull-to-refresh所有支持的属性~~</p><p>定义了一堆的效果：</p><p><img src="http://img.blog.csdn.net/20140729003602472" alt=""><br></p><p>右上、右下那个图标就是ptrShowIndicator。好了，大家可以按照自己的需求对着上面的属性解释配置。</p><p><br></p><p>在github上下载的例子，是依赖3个项目的，一个基本的library_pullToRefresh，一个PullToRefreshViewPager，一个PullToRefreshListFragment ；</p><p>上面介绍的例子只依赖library_pullToRefresh，其他两个依赖不用导入。</p><p><br></p><p><br></p><p>好了，如果你觉得本篇博客对你有用，就点个赞~留个言吧</p><p><br></p><p><span style="font-size:24px;color:#006600;"><a target="_blank" href="http://download.csdn.net/detail/lmj623565791/7689793">源码点击下载</a></span></p><p><br></p><p><br></p><p><br></p><br><p></p><br>   
转自:http://blog.csdn.net/lmj623565791/article/details/38238749

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Android PullToRefresh （ListView GridView 下拉刷新） 使用详解

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Android PullToRefresh （ListView GridView 下拉刷新）使用详解