java.lang.NoSuchMethodException: <init>

Question

我检查了调试版本中的所有内容，一切正常，但是当我生成 Signed Apk 时，出现此错误：

java.lang.NoSuchMethodException: <init> [interface org.simpleframework.xml.core.Contact, interface org.simpleframework.xml.Attribute, class org.simpleframework.xml.stream.Format]
java.lang.RuntimeException: java.lang.NoSuchMethodException: <init> [interface org.simpleframework.xml.core.Contact, interface org.simpleframework.xml.Attribute, class org.simpleframework.xml.stream.Format]
at retrofit2.converter.simplexml.SimpleXmlRequestBodyConverter.convert(SimpleXmlRequestBodyConverter.java:43)
at retrofit2.converter.simplexml.SimpleXmlRequestBodyConverter.convert(SimpleXmlRequestBodyConverter.java:26)
at retrofit2.ParameterHandler$Body.apply(ParameterHandler.java:297)
at retrofit2.ServiceMethod.toRequest(ServiceMethod.java:109)
at retrofit2.OkHttpCall.createRawCall(OkHttpCall.java:178)
at retrofit2.OkHttpCall.execute(OkHttpCall.java:162)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:171)
at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.request(OperatorSubscribeOn.java:109)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.setProducer(OperatorSubscribeOn.java:105)
at rx.Subscriber.setProducer(Subscriber.java:205)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10256)
at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.call(OperatorSubscribeOn.java:100)
at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker.call(CachedThreadScheduler.java:230)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access1(ScheduledThreadPoolExecutor.java:152)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.NoSuchMethodException: <init> [interface org.simpleframework.xml.core.Contact, interface org.simpleframework.xml.Attribute, class org.simpleframework.xml.stream.Format]
at java.lang.Class.getConstructor(Class.java:531)
at java.lang.Class.getConstructor(Class.java:495)
at org.simpleframework.xml.core.LabelExtractor$LabelBuilder.getConstructor(LabelExtractor.java:426)

如果我做对了，那就是 ProGuard 问题，但我不知道如何修复它。有什么建议吗？

Answer 1

好的，我找到了解决方案，这段代码在Proguard.rules:

-keep public class org.simpleframework.**{ *; }
-keep class org.simpleframework.xml.**{ *; }
-keep class org.simpleframework.xml.core.**{ *; }
-keep class org.simpleframework.xml.util.**{ *; }

Answer 2

作为上的一点：
指定

可能就足够了

-keep class org.simpleframework.xml.**{ *; }

没有原始答案中的其余 3 行。

根据 ProGuard manual：

** matches any part of a class name, possibly containing any number of package separators. For example, **.Test matches all Test classes in all packages except the root package. Or, com.example.** matches all classes in "com.example" and in its subpackages.

建议的解决方案可能不会涵盖同一组案例，因为它不包含 public 类在 -keep public class org.simpleframework.**{ *; }（来自原始答案）。

但是，在提供的堆栈跟踪的第一行中，只有类来自 org.simpleframework.xml... 包，而不是来自更高级别的包。

遇到类似问题：

java.lang.NoSuchMethodException: <init> [
interface org.simpleframework.xml.core.Contact, 
interface org.simpleframework.xml.ElementMap, 
class org.simpleframework.xml.stream.Format]

我通过向 ProGuard 规则添加一行行解决了这个问题。

java.lang.NoSuchMethodException: <init>

java.lang.NoSuchMethodException: <init>

java

android

nosuchmethoderror