我正在尝试在我的 android 应用中使用 YouTube Data Api。当我尝试将它作为 java 项目运行时，它运行良好，没有任何错误。但是当我尝试在我的 android 应用程序中做同样的事情时，应用程序强制关闭。这是 logcat 的输出和我的代码。
LOGCAT 的输出
01-05 00:13:17.198: E/AndroidRuntime(627): FATAL EXCEPTION: main
01-05 00:13:17.198: E/AndroidRuntime(627): java.lang.ExceptionInInitializerError
01-05 00:13:17.198: E/AndroidRuntime(627): at com.example.allinonedata.YouTubeManager.retrieveVideos(YouTubeManager.java:29)
...
01-05 00:13:17.198: E/AndroidRuntime(627): Caused by: java.lang.NoClassDefFoundError: com.google.gdata.data.media.MediaSource
这是代码 mainactivity.java
package com.example.allinonedata;
import java.util.List;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity {
String clientID = "JavaCodeGeeks";
String textQuery = "nexus 4";
int maxResults = 1;
boolean filter = true;
int timeout = 2000;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
YouTubeManager ym = new YouTubeManager(clientID);
try{
List<YouTubeVideo> videos = ym.retrieveVideos(textQuery, maxResults, filter, timeout);
for (YouTubeVideo youtubeVideo : videos) {
System.out.println(youtubeVideo.getWebPlayerUrl());
System.out.println("Thumbnails");
for (String thumbnail : youtubeVideo.getThumbnails()) {
System.out.println("\t" + thumbnail);
}
System.out.println(youtubeVideo.getEmbeddedWebPlayerUrl());
System.out.println("**************************************************");
}
}
catch(Exception e)
{
}
}
}
youtubemanager.java
package com.example.allinonedata;
import java.net.URL;
import java.util.LinkedList;
import java.util.List;
import com.google.gdata.client.youtube.YouTubeQuery;
import com.google.gdata.client.youtube.YouTubeService;
import com.google.gdata.data.media.mediarss.MediaThumbnail;
import com.google.gdata.data.youtube.VideoEntry;
import com.google.gdata.data.youtube.VideoFeed;
import com.google.gdata.data.youtube.YouTubeMediaContent;
import com.google.gdata.data.youtube.YouTubeMediaGroup;
public class YouTubeManager {
private static final String YOUTUBE_URL = "http://gdata.youtube.com/feeds/api/videos";
private static final String YOUTUBE_EMBEDDED_URL = "http://www.youtube.com/v/";
private String clientID;
public YouTubeManager(String clientID) {
this.clientID = clientID;
}
public List<YouTubeVideo> retrieveVideos(String textQuery, int maxResults,
boolean filter, int timeout) throws Exception {
YouTubeService service = new YouTubeService(clientID);
service.setConnectTimeout(timeout); // millis
YouTubeQuery query = new YouTubeQuery(new URL(YOUTUBE_URL));
query.setOrderBy(YouTubeQuery.OrderBy.RELEVANCE);
query.setFullTextQuery(textQuery);
query.setSafeSearch(YouTubeQuery.SafeSearch.NONE);
query.setMaxResults(maxResults);
VideoFeed videoFeed = service.query(query, VideoFeed.class);
List<VideoEntry> videos = videoFeed.getEntries();
return convertVideos(videos);
}
private List<YouTubeVideo> convertVideos(List<VideoEntry> videos) {
List<YouTubeVideo> youtubeVideosList = new LinkedList<YouTubeVideo>();
for (VideoEntry videoEntry : videos) {
YouTubeVideo ytv = new YouTubeVideo();
YouTubeMediaGroup mediaGroup = videoEntry.getMediaGroup();
String webPlayerUrl = mediaGroup.getPlayer().getUrl();
ytv.setWebPlayerUrl(webPlayerUrl);
String query = "?v=";
int index = webPlayerUrl.indexOf(query);
String embeddedWebPlayerUrl = webPlayerUrl.substring(index+query.length());
embeddedWebPlayerUrl = YOUTUBE_EMBEDDED_URL + embeddedWebPlayerUrl;
ytv.setEmbeddedWebPlayerUrl(embeddedWebPlayerUrl);
List<String> thumbnails = new LinkedList<String>();
for (MediaThumbnail mediaThumbnail : mediaGroup.getThumbnails()) {
thumbnails.add(mediaThumbnail.getUrl());
}
ytv.setThumbnails(thumbnails);
List<YouTubeMedia> medias = new LinkedList<YouTubeMedia>();
for (YouTubeMediaContent mediaContent : mediaGroup.getYouTubeContents()) {
medias.add(new YouTubeMedia(mediaContent.getUrl(), mediaContent.getType()));
}
ytv.setMedias(medias);
youtubeVideosList.add(ytv);
}
return youtubeVideosList;
}
}