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POGWT and Android communication. Enum serialization issue
 

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    <p>I have a perfectly working GWT application. Now I am trying to use <a href="https://code.google.com/p/gwt-syncproxy/" rel="nofollow"><code>gwt-syncproxy</code></a> to create an Android client which can simply reuse the server side code.</p> <p>So far everything was working perfectly. The only problem that I can find is when I start RPC to a method expecting an enum as a parameter.</p> <p>The enum looks something like this:</p> <pre><code>import java.io.Serializable; import com.google.gwt.user.client.rpc.IsSerializable; public enum ReferenceTable implements IsSerializable, Serializable { basetable, othertable; ReferenceTable(){} } </code></pre> <p>The error message I'm getting is:</p> <pre><code>com.google.gwt.user.client.rcp.IncompatibleRemoteServiceException: Invalid type signature for package.ReferenceTable </code></pre> <p>which suggests that it's a problem related to serialization.</p> <p>I tried using different combinations of <code>IsSerializable</code> and <code>Serializable</code> and always cleaned the project before deploying. Both the GWT app and the Android app use the <em>same</em> code for the data types used for communication.</p> <p>Does anyone have an idea how to solve this? If nothing else works, I <em>could</em> refrain from using enums, but I would prefer using them. Especially, since everything is working for the GWT server-client communication itself.</p> <hr> <p>BTW: The error on the server side is:</p> <pre><code>Caused by: com.google.gwt.user.client.rpc.SerializationException: Invalid type signature for some.package.ReferenceTable at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.validateTypeVersions(ServerSerializationStreamReader.java:1116) at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserialize(ServerSerializationStreamReader.java:610) at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.readObject(ServerSerializationStreamReader.java:567) at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader$ValueReader$8.readValue(ServerSerializationStreamReader.java:140) at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserializeValue(ServerSerializationStreamReader.java:425) at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:312) ... 24 more </code></pre> <p><strong>EDIT</strong>:</p> <p>I created both a sample GWT app and a sample Android app, so people can actually try the code:</p> <ul> <li><a href="https://dl.dropboxusercontent.com/u/498403/EnumProject.zip" rel="nofollow">GWT part</a></li> <li><a href="https://dl.dropboxusercontent.com/u/498403/EnumProjectAndroid.zip" rel="nofollow">Android part</a></li> </ul> <p>To deploy the app, just modify the <code>build.properties</code> file and then run <code>build.xml</code> as an ant script. In the <code>MainActivity</code> of the Android app, modify the URL to point to the GWT app.</p>
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    1. COHave you tried to add a non argument constructor to the ReferenceTable class?
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    2. CO@ElHoss Please have a look at the code again. There is a non argument constructor.
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    3. COups ... You are right. is your class inside your source packages?
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