YouTube gdata API for Android

Question

我可以在YouTube中使用Java Android data API jar开发YouTube应用程序吗

我试着集成这个jar。但是当我运行它时，它显示异常

class def not found for YouTubeService

有时它会显示

class def not found for MediaSource

这是我测试的示例程序。我想打印查询后获得的列表的大小。

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);


    service = new YouTubeService("myService");
    urlString = "http://gdata.youtube.com/feeds/api/standardfeeds/top_rated";
    try {
        videoFeed = service.getFeed(new URL(urlString), VideoFeed.class);
        videoEntries = videoFeed.getEntries();
        System.out.println("List Size"+videoEntries.size());


    } catch (MalformedURLException e) {

        e.printStackTrace();
    } catch (IOException e) {

        e.printStackTrace();
    } catch (ServiceException e) {

        e.printStackTrace();
    }



}

现在，它显示以下错误。

09-03 16:27:38.844: WARN/XmlParser(387): javax.xml.parsers.ParserConfigurationException: org.xml.sax.SAXNotRecognizedException: http://xml.org/sax/features/external-parameter-entities
09-03 16:27:38.844: WARN/XmlParser(387): javax.xml.parsers.ParserConfigurationException: org.xml.sax.SAXNotRecognizedException: http://xml.org/sax/features/external-parameter-entities
09-03 16:27:38.844: WARN/XmlParser(387):     at org.apache.harmony.xml.parsers.SAXParserFactoryImpl.newSAXParser(SAXParserFactoryImpl.java:84)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.util.XmlParser.parse(XmlParser.java:682)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.util.XmlParser.parse(XmlParser.java:576)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.data.BaseFeed.parseAtom(BaseFeed.java:867)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.wireformats.input.AtomDataParser.parse(AtomDataParser.java:68)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.wireformats.input.AtomDataParser.parse(AtomDataParser.java:39)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.wireformats.input.CharacterParser.parse(CharacterParser.java:100)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.wireformats.input.XmlInputParser.parse(XmlInputParser.java:52)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.wireformats.input.AtomDualParser.parse(AtomDualParser.java:66)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.wireformats.input.AtomDualParser.parse(AtomDualParser.java:34)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.client.Service.parseResponseData(Service.java:2165)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.client.Service.parseResponseData(Service.java:2098)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.client.Service.getFeed(Service.java:1136)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.client.Service.getFeed(Service.java:998)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:631)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.google.gdata.client.Service.getFeed(Service.java:1017)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.mcet.youtube.YoutubeActivity.onCreate(YoutubeActivity.java:38)
09-03 16:27:38.844: WARN/XmlParser(387):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-03 16:27:38.844: WARN/XmlParser(387):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
09-03 16:27:38.844: WARN/XmlParser(387):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
09-03 16:27:38.844: WARN/XmlParser(387):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
09-03 16:27:38.844: WARN/XmlParser(387):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
09-03 16:27:38.844: WARN/XmlParser(387):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-03 16:27:38.844: WARN/XmlParser(387):     at android.os.Looper.loop(Looper.java:123)
09-03 16:27:38.844: WARN/XmlParser(387):     at android.app.ActivityThread.main(ActivityThread.java:4627)
09-03 16:27:38.844: WARN/XmlParser(387):     at java.lang.reflect.Method.invokeNative(Native Method)
09-03 16:27:38.844: WARN/XmlParser(387):     at java.lang.reflect.Method.invoke(Method.java:521)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-03 16:27:38.844: WARN/XmlParser(387):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-03 16:27:38.844: WARN/XmlParser(387):     at dalvik.system.NativeStart.main(Native Method)
09-03 16:27:38.997: WARN/System.err(387): com.google.gdata.util.ParseException: org.xml.sax.SAXNotRecognizedException: http://xml.org/sax/features/external-parameter-entities
09-03 16:27:39.005: WARN/System.err(387):     at com.google.gdata.util.XmlParser.parse(XmlParser.java:708)
09-03 16:27:39.005: WARN/System.err(387):     at com.google.gdata.util.XmlParser.parse(XmlParser.java:576)
09-03 16:27:39.005: WARN/System.err(387):     at com.google.gdata.data.BaseFeed.parseAtom(BaseFeed.java:867)
09-03 16:27:39.005: WARN/System.err(387):     at com.google.gdata.wireformats.input.AtomDataParser.parse(AtomDataParser.java:68)
09-03 16:27:39.014: WARN/System.err(387):     at com.google.gdata.wireformats.input.AtomDataParser.parse(AtomDataParser.java:39)
09-03 16:27:39.014: WARN/System.err(387):     at com.google.gdata.wireformats.input.CharacterParser.parse(CharacterParser.java:100)
09-03 16:27:39.014: WARN/System.err(387):     at com.google.gdata.wireformats.input.XmlInputParser.parse(XmlInputParser.java:52)
09-03 16:27:39.025: WARN/System.err(387):     at com.google.gdata.wireformats.input.AtomDualParser.parse(AtomDualParser.java:66)
09-03 16:27:39.025: WARN/System.err(387):     at com.google.gdata.wireformats.input.AtomDualParser.parse(AtomDualParser.java:34)
09-03 16:27:39.025: WARN/System.err(387):     at com.google.gdata.client.Service.parseResponseData(Service.java:2165)
09-03 16:27:39.035: WARN/System.err(387):     at com.google.gdata.client.Service.parseResponseData(Service.java:2098)
09-03 16:27:39.035: WARN/System.err(387):     at com.google.gdata.client.Service.getFeed(Service.java:1136)
09-03 16:27:39.035: WARN/System.err(387):     at com.google.gdata.client.Service.getFeed(Service.java:998)
09-03 16:27:39.044: WARN/System.err(387):     at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:631)
09-03 16:27:39.044: WARN/System.err(387):     at com.google.gdata.client.Service.getFeed(Service.java:1017)
09-03 16:27:39.044: WARN/System.err(387):     at com.mcet.youtube.YoutubeActivity.onCreate(YoutubeActivity.java:38)
09-03 16:27:39.054: WARN/System.err(387):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-03 16:27:39.054: WARN/System.err(387):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
09-03 16:27:39.054: WARN/System.err(387):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
09-03 16:27:39.064: WARN/System.err(387):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
09-03 16:27:39.064: WARN/System.err(387):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
09-03 16:27:39.064: WARN/System.err(387):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-03 16:27:39.074: WARN/System.err(387):     at android.os.Looper.loop(Looper.java:123)
09-03 16:27:39.074: WARN/System.err(387):     at android.app.ActivityThread.main(ActivityThread.java:4627)
09-03 16:27:39.074: WARN/System.err(387):     at java.lang.reflect.Method.invokeNative(Native Method)
09-03 16:27:39.084: WARN/System.err(387):     at java.lang.reflect.Method.invoke(Method.java:521)
09-03 16:27:39.084: WARN/System.err(387):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-03 16:27:39.084: WARN/System.err(387):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-03 16:27:39.084: WARN/System.err(387):     at dalvik.system.NativeStart.main(Native Method)
09-03 16:27:39.095: WARN/System.err(387): Caused by: javax.xml.parsers.ParserConfigurationException: org.xml.sax.SAXNotRecognizedException: http://xml.org/sax/features/external-parameter-entities
09-03 16:27:39.095: WARN/System.err(387):     at org.apache.harmony.xml.parsers.SAXParserFactoryImpl.newSAXParser(SAXParserFactoryImpl.java:84)
09-03 16:27:39.095: WARN/System.err(387):     at com.google.gdata.util.XmlParser.parse(XmlParser.java:682)
09-03 16:27:39.095: WARN/System.err(387):     ... 28 more

Answer 1

我不能完全确定(你的问题可以更清楚一点吗？)但我认为你遇到的问题是，你需要在JavaMail的安卓端口，它可以找到here。将现有的mail.jar和activation.jar替换为其中的两个，并添加additionnal.jar。这将有望解决您的问题。

如果没有，请添加您的LogCat输出和有关该错误的更多详细信息，我将尝试提供进一步的帮助。