facebookApp抓取相片集

最近一定都要來facebook一下,
今天來介紹如何在網站裡, 得到目前使用者facebook裡的相片集
1.請申app, 得到API_KEY和SECRET_KEY
關於facebook app申請與設定, 可以參考
http://milkmidi.blogspot.com/2009/10/facebook-app.html
2.下載facebook flash api類別：
http://code.google.com/p/facebook-actionscript-api/
3.說明一下原理
使用者在你的應用程式裡點選登入後, 會自動開啟connect的頁面, 讓使用者同意你的app取存個人資訊
登入成功後, 就可以開始要資訊
相片集的話, 會有二個部份
一個是Albums(就是相本, 使用GetAlbums類別)
一個是Photos(就是相本裡的相片, 使用GetPhotos類別, 要帶入Albums裡的id值)
二者呼叫fb後回傳的結果都是一個Collection
在這兒使用Flex來練習, 當然用Flash原理也是一樣的

＜![CDATA[
import com.facebook.commands.data.*;   
import com.facebook.commands.friends.GetFriends;
import com.facebook.data.friends.GetFriendsData;
import com.facebook.data.photos.AlbumData;
import com.facebook.data.photos.PhotoData;
import com.facebook.data.users.FacebookUserCollection;      
import com.facebook.Facebook;
import com.facebook.events.FacebookEvent;
import com.facebook.net.FacebookCall;
import com.facebook.data.photos.*;   
import com.facebook.commands.photos.*;   
import com.facebook.utils.FacebookSessionUtil;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.utils.ObjectUtil;
private static const API_KEY  :String = "365c040dcb9fc14260ceb5234107e1e5";
private static const SECRET_KEY :String = "2c7e80f2551c4593ba02d2c2c8e92498"; 
private var fbook  :Facebook;
private var fbSession :FacebookSessionUtil;   

[Bindable] private var facebookPhotoAlbums :ArrayCollection; 
[Bindable] private var facebookPhotos  :ArrayCollection;   

private function appComplete():void {
fbSession = new FacebookSessionUtil( API_KEY , SECRET_KEY, loaderInfo);                   
fbSession.addEventListener(FacebookEvent.WAITING_FOR_LOGIN, _waitingForLoginHandler); 
//等待使用者點選同意時。
fbSession.addEventListener(FacebookEvent.CONNECT, _fbfbSessionConnectHandler);   
//當使用者點選同意connect後。
}         
private function _waitingForLoginHandler(e:FacebookEvent):void {
var _alert:Alert = Alert.show("Click OK when you've logged in", "Logging into Facebook");
//跳一個Alert;
status.text = "Connecting";
_alert.addEventListener(Event.CLOSE, doClose);    
}
private function doClose(e:Event):void {   
fbSession.validateLogin();         
//關掉alert時，去驗證是否登入成功。
}        
private function _fbfbSessionConnectHandler(e:FacebookEvent):void {
status.text = "Facebook API Ready"; 
fbook = fbSession.facebook;    
//is_connected屬性即可得知是否登入成功。
if (fbook.is_connected) 
getPhotoAlbums();    
}      
private function getPhotoAlbums():void {    
//得到相本集
var _call:FacebookCall = fbook.post(new GetAlbums(fbook.uid));    
_call.addEventListener(FacebookEvent.COMPLETE, _getAlbumsHandler);          
}
private function _getAlbumsHandler(e:FacebookEvent):void {
var _getAlbumsData:GetAlbumsData = e.data as GetAlbumsData;    
if (!_getAlbumsData || e.error){ 
status.text = "Error";
return;
}       
facebookPhotoAlbums = new ArrayCollection();                  
for (var i:int = 0; i < _getAlbumsData.albumCollection.length; i++) {
var _obj:AlbumData = _getAlbumsData.albumCollection.getItemAt(i) as AlbumData;     
facebookPhotoAlbums.addItem(_obj);        
}   
}   
private function showSelectedAlbumHandler(e:Event):void {  
//得到相本
var _selectedAlbumID:String = e.currentTarget.selectedItem.aid;
trace("selectedAlbumID:" + _selectedAlbumID);    
var _call:FacebookCall = fbook.post(new GetPhotos('', _selectedAlbumID));
_call.addEventListener(FacebookEvent.COMPLETE, _getPhotosHandler);
}
private function _getPhotosHandler(e:FacebookEvent):void {
var _getPhotosData :GetPhotosData = e.data as GetPhotosData;    
if (!_getPhotosData || e.error){ 
status.text = "Error";
return;
}              
facebookPhotos = new ArrayCollection();      
for (var i:int = 0; i < _getPhotosData.photoCollection.length; i++) {
var _obj:PhotoData = _getPhotosData.photoCollection.getItemAt(i) as PhotoData;              
facebookPhotos.addItem(_obj); 
}
}   
]]>