我尝试在 Android 中使用 Apache Olingo OData 2.0 实现 OData V2 客户端。
将客户端类作为 java 类执行工作正常,但我无法在 AsyncTask 中使用相同的代码运行 Android 应用程序:
E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
Process: com.my.app.appname, PID: 2521
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.conurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
java.util.conurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Ljavax/xml/stream/XMLInputFactory;
at org.apache.olingo.odata2.core.commons.XmlHelper.createStreamReader(XmlHelper.java:41)
org.apache.olingo.odata2.core.edm.provider.EdmxProvider.parse(EdmxProvider.java:50)
org.apache.olingo.odata2.core.ep.ProviderFacadeImpl.readMetadata(ProviderFacadeImpl.java:224)
org.apache.olingo.odata2.api.ep.EntityProvider.readMetadata(EntityProvider.java:844)
at connectivity.MyClass.doInBackground(MyClass.java:153)
at connectivity.MyClass.doInBackground(MyClass.java:38)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237) <4 more...>
Caused by: java.lang.ClassNotFoundException: Didn't find class "javax.xml.stream.XMLInputFactory" on path: DexPathList[[zip file "/data/app/com.my.app.appname-2/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469) <12 more...>
Suppressed: java.lang.ClassNotFoundException: javax.xml.stream.XmlInputFactory
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.findClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 13 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
我的问题是:(
如何)我可以解决这个问题吗?
(我在某处读到,Android 可能不支持缺少的类?)
切换到 Apache Olingo OData 4.0 会有所帮助吗?
(我需要使用 OData V2 服务,如果 Olingo V4 在 Android 上支持这个,我可能会尝试迁移我的客户端......)
提前致谢!