title: Unable to Marshal value on Serializable Data
body: <p>I get the following error when trying to pass a HashMap to my MainActivity class (TabooCards implements Serializable). I read around here that HashMap is serializable, and that any Objects contained in the HashMap must also be serializable. I assume <code>Integer</code> is serializable, and I know <code>TabooCards</code> is serializable, so what's going wrong?</p>
  
  <p>Code: </p>
  
  <p><strong>AsyncTask onPostExecute:</strong></p>
  
  <pre><code>protected void onPostExecute(HashMap&lt;Integer, TabooCard&gt; result) {
              super.onPostExecute(result);
              Intent i = new Intent(getBaseContext(), MainActivity.class);
              i.putExtra("TABOO_CARDS", tabooCards);
              startActivity(i);
          }
  </code></pre>
  
  <p><strong>TabooCards:</strong></p>
  
  <pre><code>public class TabooCard implements Serializable{
  
      /**
       * 
       */
      private static final long serialVersionUID = -6996042490365349623L;
      String mainWord, taboo1, taboo2, taboo3, taboo4, taboo5;
  
      public TabooCard() {
          this("Main Card", "Taboo 1", "Taboo 2", "Taboo 3", "Taboo 4", "Taboo 5");
      }
  
      public TabooCard(String mainword, String taboo1, String taboo2, String taboo3, String taboo4, String taboo5) {
          setMainWord(mainword);
          setTaboo1(taboo1);
          setTaboo2(taboo2);
          setTaboo3(taboo3);
          setTaboo4(taboo4);
          setTaboo5(taboo5);
      }
  
        //Various getter/setter methods
  </code></pre>
  
  <p>Logcat</p>
  
  <pre><code>   E/AndroidRuntime(28441): FATAL EXCEPTION: main
  E/AndroidRuntime(28441): Process: com.jaytj.taboo, PID: 28441
  E/AndroidRuntime(28441): java.lang.RuntimeException: Parcel: unable to marshal value com.jaytj.taboo.TabooCard@42d2fce8
  E/AndroidRuntime(28441):        at android.os.Parcel.writeValue(Parcel.java:1266)
  E/AndroidRuntime(28441):        at android.os.Parcel.writeMapInternal(Parcel.java:594)
  E/AndroidRuntime(28441):        at android.os.Parcel.writeMap(Parcel.java:578)
  E/AndroidRuntime(28441):        at android.os.Parcel.writeValue(Parcel.java:1197)
  E/AndroidRuntime(28441):        at android.os.Parcel.writeArrayMapInternal(Parcel.java:618)
  E/AndroidRuntime(28441):        at android.os.Bundle.writeToParcel(Bundle.java:1692)
  E/AndroidRuntime(28441):        at android.os.Parcel.writeBundle(Parcel.java:636)
  E/AndroidRuntime(28441):        at android.content.Intent.writeToParcel(Intent.java:7410)
  E/AndroidRuntime(28441):        at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:2289)
  E/AndroidRuntime(28441):        at android.app.Instrumentation.execStartActivity(Instrumentation.java:1437)
  E/AndroidRuntime(28441):        at android.app.Activity.startActivityForResult(Activity.java:3511)
  E/AndroidRuntime(28441):        at android.app.Activity.startActivityForResult(Activity.java:3472)
  E/AndroidRuntime(28441):        at android.app.Activity.startActivity(Activity.java:3714)
  E/AndroidRuntime(28441):        at android.app.Activity.startActivity(Activity.java:3682)
  E/AndroidRuntime(28441):        at com.jaytj.taboo.SplashActivity$AsyncWordGrabber.onPostExecute(SplashActivity.java:47)
  E/AndroidRuntime(28441):        at com.jaytj.taboo.SplashActivity$AsyncWordGrabber.onPostExecute(SplashActivity.java:1)
  E/AndroidRuntime(28441):        at android.os.AsyncTask.finish(AsyncTask.java:632)
  E/AndroidRuntime(28441):        at android.os.AsyncTask.access$600(AsyncTask.java:177)
  E/AndroidRuntime(28441):        at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
  E/AndroidRuntime(28441):        at android.os.Handler.dispatchMessage(Handler.java:102)
  E/AndroidRuntime(28441):        at android.os.Looper.loop(Looper.java:157)
  E/AndroidRuntime(28441):        at android.app.ActivityThread.main(ActivityThread.java:5356)
  E/AndroidRuntime(28441):        at java.lang.reflect.Method.invokeNative(Native Method)
  E/AndroidRuntime(28441):        at java.lang.reflect.Method.invoke(Method.java:515)
  E/AndroidRuntime(28441):        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
  E/AndroidRuntime(28441):        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
  E/AndroidRuntime(28441):        at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132)
  E/AndroidRuntime(28441):        at dalvik.system.NativeStart.main(Native Method)
  </code></pre>