title: Error passing serializable custom object between two activities android
body: <p>in my program I must to pass a custom object between two activities. The second activity start after click on an item of a listview in the first activity. The code in OnItemClick of first activity is:</p>
  
  <pre><code>public void onItemClick(AdapterView&lt;?&gt; arg0, View v,
                      int position, long arg3) {
  
                  Intent userProfileIntent = new Intent(v.getContext(),
                          UserProfileActivity.class);
                  Bundle bundle = new Bundle();
                  bundle.putSerializable("contact", new ContactSerializer(
                          sortContacts.get(position)));
                  userProfileIntent.putExtras(bundle);
                  v.getContext().startActivity(userProfileIntent);
  
              }
  </code></pre>
  
  <p>The code of second activity is:</p>
  
  <pre><code>protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
  
      setContentView(R.layout.userprofile_layout);
  
      ContactSerializer serializer = (ContactSerializer) getIntent()
              .getSerializableExtra("contact");
  
      CustomObj contact = serializer.getContact();
  </code></pre>
  
  <p>And the code of the serializable object is:</p>
  
  <pre><code>public class ContactSerializer implements Serializable {
  
  private CustomObj contact;
  
  public ContactSerializer(CustomObj contact) {
      this.contact = contact;
  }
  
  public CustomObj getContact() {
      return contact;
  }
  </code></pre>
  
  <p>}</p>
  
  <p>My LogCat is:</p>
  
  <pre><code>07-10 13:07:57.777: E/AndroidRuntime(1333): FATAL EXCEPTION: main
  07-10 13:07:57.777: E/AndroidRuntime(1333): java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.app.ContactSerializer)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.os.Parcel.writeSerializable(Parcel.java:1279)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.os.Parcel.writeValue(Parcel.java:1233)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.os.Parcel.writeMapInternal(Parcel.java:591)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.os.Bundle.writeToParcel(Bundle.java:1627)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.os.Parcel.writeBundle(Parcel.java:605)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.content.Intent.writeToParcel(Intent.java:6660)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1865)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1412)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.app.Activity.startActivityForResult(Activity.java:3370)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.app.Activity.startActivityForResult(Activity.java:3331)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.app.Activity.startActivity(Activity.java:3566)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.app.Activity.startActivity(Activity.java:3534)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at com.app.MyProfileActivity$ContactsLoader$1.onItemClick(MyProfileActivity.java:153)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.widget.AdapterView.performItemClick(AdapterView.java:298)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.widget.AbsListView.performItemClick(AbsListView.java:1100)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:2749)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.widget.AbsListView$1.run(AbsListView.java:3423)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.os.Handler.handleCallback(Handler.java:725)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.os.Handler.dispatchMessage(Handler.java:92)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.os.Looper.loop(Looper.java:137)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.app.ActivityThread.main(ActivityThread.java:5041)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.lang.reflect.Method.invokeNative(Native Method)
  070 13:07:57.777: E/AndroidRuntime(1333):   at java.lang.reflect.Method.invoke(Method.java:511)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at dalvik.system.NativeStart.main(Native Method)
  07-10 13:07:57.777: E/AndroidRuntime(1333): Caused by: java.io.NotSerializableException: com.CustomObj
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1364)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     at android.os.Parcel.writeSerializable(Parcel.java:1274)
  07-10 13:07:57.777: E/AndroidRuntime(1333):     ... 25 more
  </code></pre>
  
  <p>The application crash when I try to start the second activity (on line v.getContext.startActivity....). Any ideas?</p>