tourdeflexmobile/src/views/VideosView.mxml

<?xml version="1.0" encoding="utf-8"?>
<!--

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contributor license agreements.  See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License.  You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

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distributed under the License is distributed on an "AS IS" BASIS,
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limitations under the License.

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<s:View xmlns:fx="http://ns.adobe.com/mxml/2009" 
		xmlns:s="library://ns.adobe.com/flex/spark" title="Videos" viewActivate="init(event)">
	<fx:Script>
		<![CDATA[
			import mx.collections.ArrayList;
			import mx.events.FlexEvent;
			import mx.events.PropertyChangeEvent;
			import mx.rpc.events.ResultEvent;
			
			import spark.events.IndexChangeEvent;
			import spark.events.ViewNavigatorEvent;
			
			private static const YOUTUBE_API_KEY:String = "COPY_YOUR_YOUTUBE_APIKEY_HERE";
			private var pageToken:String;
			private var loading:Boolean;
									
			protected function init(event:ViewNavigatorEvent):void
			{
				myBusy.visible = true;
				pageToken = "";
				youtubeService.url = "https://www.googleapis.com/youtube/v3/search?q=Apache%20Flex%7CAdobe%20Flex&maxResults=50&order=date&type=video&part=snippet&key="+YOUTUBE_API_KEY;
				youtubeService.send();
			}
			
			protected function changeSearch(event:IndexChangeEvent):void
			{			
				
				pageToken = "";
				myBusy.visible = true;
				
				if(myButtonBar.selectedItem.search == "RecentVideos"){
					youtubeService.url = "https://www.googleapis.com/youtube/v3/search?q=Apache%20Flex%7CAdobe%20Flex&maxResults=50&order=date&type=video&part=snippet&key="+YOUTUBE_API_KEY;
				} else {
					youtubeService.url = "https://www.googleapis.com/youtube/v3/search?q=Apache%20Flex%7CAdobe%20Flex&maxResults=50&order=relevance&type=video&part=snippet&key="+YOUTUBE_API_KEY;
				}
				
				videosList.dataProvider = null;
				youtubeService.send();
			}
			
			protected function youtubeService_resultHandler(event:ResultEvent):void
			{
				var rawData:Object = JSON.parse(String(event.result));
				pageToken = rawData.nextPageToken;
				
				if(videosList.dataProvider == null){
					var videosArray:ArrayList = new ArrayList(rawData.items as Array);
					videosList.dataProvider = videosArray;
				} else {
					for each (var item:* in rawData.items){
						videosList.dataProvider.addItem(item);
					}
				}
				
				loading = false;
				myBusy.visible = false;
			}
			
			protected function selectVideo(event:IndexChangeEvent):void
			{
				var myObject:Object = new Object();
				myObject.title = videosList.selectedItem.snippet.title;
				myObject.url = videosList.selectedItem.id.videoId;
				navigator.pushView(VideoDetailsView, myObject);
			}
			
			protected function videosList_creationCompleteHandler(event:FlexEvent):void
			{
				videosList.scroller.viewport.addEventListener(PropertyChangeEvent.PROPERTY_CHANGE, propertyChangeHandler);
			}
			
			protected function propertyChangeHandler( event : PropertyChangeEvent):void {
				if(event.property == "verticalScrollPosition"){
					if(event.newValue == ( event.currentTarget.measuredHeight - event.currentTarget.height)){
						loadMore();
					}
				}
			}
			
			public function loadMore():void{
				if(!loading){
					myBusy.visible = true;
					loading = true;
					
					if(myButtonBar.selectedItem.search == "RecentVideos"){
						youtubeService.url = "https://www.googleapis.com/youtube/v3/search?q=Apache%20Flex%7CAdobe%20Flex&maxResults=50&pageToken="+pageToken+"&order=date&type=video&part=snippet&key="+YOUTUBE_API_KEY;
					} else {
						youtubeService.url = "https://www.googleapis.com/youtube/v3/search?q=Apache%20Flex%7CAdobe%20Flex&maxResults=50&pageToken="+pageToken+"&order=relevance&type=video&part=snippet&key="+YOUTUBE_API_KEY;
					}
					
					youtubeService.send();
				}
			}
			
		]]>
	</fx:Script>
	
	<fx:Declarations>
		<s:HTTPService id="youtubeService" resultFormat="text" result="youtubeService_resultHandler(event)"/>
	</fx:Declarations>
		
	<s:ButtonBar  id="myButtonBar" change="changeSearch(event)" left="5" right="5" top="5" height="40" requireSelection="true" selectedIndex="0">
		<s:ArrayList>
			<fx:Object label="Recent Videos" search="RecentVideos"/>
			<fx:Object label="Popular Videos" search="PopularVideos"/>
		</s:ArrayList>	
	</s:ButtonBar>
	
	<s:List id="videosList" creationComplete="videosList_creationCompleteHandler(event)" change="selectVideo(event)" width="100%" top="50" bottom="0">
		<s:itemRenderer>
			<fx:Component>
				<s:IconItemRenderer labelFunction="myLabelFunction" messageFunction="myMessageFunction" iconFunction="myIconFunction" iconWidth="60" iconHeight="50" iconScaleMode="letterbox">
					<s:decorator>
						<s:MultiDPIBitmapSource source160dpi="@Embed('assets/icons/160/1_navigation_next_item.png')"
												source240dpi="@Embed('assets/icons/240/1_navigation_next_item.png')"
												source320dpi="@Embed('assets/icons/320/1_navigation_next_item.png')"/>
					</s:decorator>
					
					<fx:Script>
						<![CDATA[
							
							private function myIconFunction(item:Object):String{		
								return data.snippet.thumbnails.medium.url;							
							}
							
							private function myLabelFunction(item:Object):String{								
								return data.snippet.title;
							}
							
							private function myMessageFunction(item:Object):String{								
								return data.snippet.channelTitle+ "\n" + String(data.snippet.publishedAt).substr(0, 10);
							}
						]]>
					</fx:Script>
				</s:IconItemRenderer>
			</fx:Component>
		</s:itemRenderer>
	</s:List>
	
	<s:BusyIndicator id="myBusy" verticalCenter="0" horizontalCenter="0" visible="false"/>
</s:View>