我正在尝试使用 google-api-java-client 库访问 Google Docs。我正在使用下面列出的库。
- google-api-client-1.4.1-beta.jar
- google-api-client-googleapis-1.4.1-beta.jar
- google-api-client-googleapis-extensions-andr
- 番石榴-r09.jar
我可以得到提要,但无法解析,我遇到了异常。我的代码是这样的;
HttpTransport transport = new NetHttpTransport();
GoogleHeaders headers = new GoogleHeaders();
transport.defaultHeaders = headers;
headers.setApplicationName("hohoho-GoogleDocsTest/1.0");
headers.gdataVersion = "3";
headers.setGoogleLogin(authToken);
AtomParser parser = new AtomParser();
parser.namespaceDictionary = new XmlNamespaceDictionary();
transport.addParser(parser);
HttpRequest request = transport.buildGetRequest();
request.url = <GoogleUrl of "https://docs.google.com/feeds/default/private/full">
HttpResponse res = request.execute();
Feed feed = res.parseAs(Feed.class); // <- got exception
堆栈跟踪是:
05-24 22:05:34.853: ERROR/AndroidRuntime(6830): Caused by: java.lang.NullPointerException
05-24 22:05:34.853: ERROR/AndroidRuntime(6830): at com.google.api.client.util.Types.getActualParameterAtPosition(Types.java:329)
05-24 22:05:34.853: ERROR/AndroidRuntime(6830): at com.google.api.client.util.Types.getIterableParameter(Types.java:309)
05-24 22:05:34.853: ERROR/AndroidRuntime(6830): at com.google.api.client.xml.Xml.parseElementInternal(Xml.java:417)
05-24 22:05:34.853: ERROR/AndroidRuntime(6830): at com.google.api.client.xml.Xml.parseElement(Xml.java:198)
05-24 22:05:34.853: ERROR/AndroidRuntime(6830): at com.google.api.client.http.xml.XmlHttpParser.parse(XmlHttpParser.java:72)
05-24 22:05:34.853: ERROR/AndroidRuntime(6830): at com.google.api.client.http.HttpResponse.parseAs(HttpResponse.java:298)
05-24 22:05:34.853: ERROR/AndroidRuntime(6830): at net.DailyTimer.test.model.Feed.executeGet(Feed.java:24)
我不知道为什么它会遇到 NullPointerException。对我来说,反应看起来不错。状态是好的,代码是 200,有很多项目必须来自文档。
请告诉我有什么问题。谢谢。