Android学习之开源项目PullToRefresh的使用

首先 下载 Android-PullToRefresh-master



下载地址 https://github.com/chrisbanes/Android-PullToRefresh
下载之后将其解压



现在 我们用eclipse 创建一个项目取名PullToRefresh

将上面的library 引入我们的项目

引入成功之后打开项目的project.properties文件我们可以看到

android.library.reference.1=../Android-PullToRefresh-master/library

这样就表示可以引用成功了

我们在res/layout创建 布局文件main.xml

view
sourceprint?

01.

<?xml
version=

"1.0"

encoding=

"utf-8"

?>

02.

<LinearLayout
xmlns:android=

"http://schemas.android.com/apk/res/android"

03.

android:layout_width=

"match_parent"

04.

android:layout_height=

"match_parent"

05.

android:background=

"#FFFFFF"

06.

android:orientation=

"vertical"

>

07.

08.

<!--
xmlns:ptr =

"http://schemas.android.com/apk/res-auto"

为我们要使用PullToRefresh
里面一些属性需要引的命名空间 -->

09.

<com.handmark.pulltorefresh.library.PullToRefreshListView

10.

xmlns:ptr
=

"http://schemas.android.com/apk/res-auto"

11.

android:id=

"@+id/pull_refresh_list"

12.

android:layout_width=

"fill_parent"

13.

android:layout_height=

"fill_parent"

14.

android:dividerHeight=

"4dp"

15.

android:fadingEdge=

"none"

16.

android:fastScrollEnabled=

"false"

17.

android:footerDividersEnabled=

"false"

18.

android:headerDividersEnabled=

"false"

19.

android:smoothScrollbar=

"true"

20.

ptr:ptrMode=

"both"

21.

/>

22.

</LinearLayout>

接着创建 MainActivity.java

view
sourceprint?

001.

package

com.pulltorefresh;

002.

003.

import

java.util.Arrays;

004.

import

java.util.LinkedList;

005.

006.

import

android.app.Activity;

007.

import

android.os.AsyncTask;

008.

import

android.os.Bundle;

009.

import

android.widget.ArrayAdapter;

010.

import

android.widget.ListView;

011.

import

android.widget.Toast;

012.

013.

import

com.handmark.pulltorefresh.library.PullToRefreshBase;

014.

import

com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2;

015.

import

com.handmark.pulltorefresh.library.PullToRefreshBase.State;

016.

import

com.handmark.pulltorefresh.library.PullToRefreshListView;

017.

import

com.handmark.pulltorefresh.library.extras.SoundPullEventListener;

018.

019.

020.

021.

public

class

MainActivity

extends

Activity
{

022.

023.

024.

static

final

int

MENU_MANUAL_REFRESH
=

0

;

025.

static

final

int

MENU_DISABLE_SCROLL
=

1

;

026.

static

final

int

MENU_SET_MODE
=

2

;

027.

static

final

int

MENU_DEMO
=

3

;

028.

029.

private

LinkedList<String>
mListItems;

030.

private

PullToRefreshListView
mPullRefreshListView;

031.

private

ArrayAdapter<String>
mAdapter;

032.

033.

@Override

034.

protected

void

onCreate(Bundle
savedInstanceState) {

035.

super

.onCreate(savedInstanceState);

036.

setContentView(R.layout.main);

037.

mPullRefreshListView
= (PullToRefreshListView) findViewById(R.id.pull_refresh_list);

038.

039.

040.

/**

041.

*
实现 接口  OnRefreshListener2<ListView>  以便与监听  滚动条到顶部和到底部

042.

*/

043.

mPullRefreshListView.setOnRefreshListener(

new

OnRefreshListener2<ListView>()
{

044.

@Override

045.

public

void

onPullDownToRefresh(
PullToRefreshBase<ListView> refreshView) {

046.

Toast.makeText(MainActivity.

this

,

"onPullDownToRefresh"

,
Toast.LENGTH_SHORT).show();

047.

new

GetDataTask().execute();

048.

}

049.

@Override

050.

public

void

onPullUpToRefresh(
PullToRefreshBase<ListView> refreshView) {

051.

Toast.makeText(MainActivity.

this

,

"onPullUpToRefresh"

,
Toast.LENGTH_SHORT).show();

052.

new

GetDataTask().execute();

053.

}

054.

});

055.

056.

057.

058.

ListView
actualListView = mPullRefreshListView.getRefreshableView();

059.

060.

//
Need to use the Actual ListView when registering for Context Menu

061.

registerForContextMenu(actualListView);

062.

063.

mListItems
=

new

LinkedList<String>();

064.

mListItems.addAll(Arrays.asList(mStrings));

065.

066.

mAdapter
=

new

ArrayAdapter<String>(

this

,
android.R.layout.simple_list_item_1,mListItems);

067.

068.

/**

069.

*
Add Sound Event Listener

070.

*/

071.

072.

/**

073.

*
设置下拉刷新和上拉加载时的 铃声（可有可无）

074.

*/

075.

SoundPullEventListener<ListView>
soundListener =

new

SoundPullEventListener<ListView>(

this

);

076.

soundListener.addSoundEvent(State.PULL_TO_REFRESH,
R.raw.pull_event);

077.

soundListener.addSoundEvent(State.RESET,
R.raw.reset_sound);

078.

soundListener.addSoundEvent(State.REFRESHING,
R.raw.refreshing_sound);

079.

mPullRefreshListView.setOnPullEventListener(soundListener);

080.

081.

//
You can also just use setListAdapter(mAdapter) or

082.

//
mPullRefreshListView.setAdapter(mAdapter)

083.

actualListView.setAdapter(mAdapter);

084.

085.

086.

087.

}

088.

//模拟网络加载数据的
异步请求类

089.

//

090.

private

class

GetDataTask

extends

AsyncTask<Void,
Void,String[]> {

091.

092.

//子线程请求数据

093.

@Override

094.

protected

String[]
doInBackground(Void... params) {

095.

//
Simulates a background job.

096.

try

{

097.

Thread.sleep(

10

);

098.

}

catch

(InterruptedException
e) {

099.

}

100.

return

mStrings;

101.

}

102.

103.

//主线程更新UI

104.

@Override

105.

protected

void

onPostExecute(String[]
result) {

106.

107.

//向RefreshListView
Item 添加一行数据  并刷新ListView

108.

//mListItems.addLast("Added
after refresh...");

109.

mListItems.addFirst(

"Added
after refresh..."

);

110.

mAdapter.notifyDataSetChanged();

111.

112.

//通知RefreshListView
我们已经更新完成

113.

//
Call onRefreshComplete when the list has been refreshed.

114.

mPullRefreshListView.onRefreshComplete();

115.

116.

super

.onPostExecute(result);

117.

}

118.

}

119.

120.

121.

122.

//数据源

123.

private

String[]
mStrings = {

"Abbaye
de Belloc"

,

"Abbaye
du Mont des Cats"

,

"Abertam"

,

"Abondance"

,

"Ackawi"

,

124.

"Acorn"

,

"Adelost"

,

"Affidelice
au Chablis"

,

"Afuega'l
Pitu"

,

"Airag"

,

"Airedale"

,

"Aisy
Cendre"

,

125.

"Allgauer
Emmentaler"

,

"Abbaye
de Belloc"

,

"Abbaye
du Mont des Cats"

,

"Abertam"

,

"Abondance"

,

"Ackawi"

,

126.

"Acorn"

,

"Adelost"

,

"Affidelice
au Chablis"

,

"Afuega'l
Pitu"

,

"Airag"

,

"Airedale"

,

"Aisy
Cendre"

,

127.

"Allgauer
Emmentaler"

};

128.

}

目前编码已经完成 我们测试一下





到此我们学习完成