The type 'GroupExpandedEventArgs' already contains a definition for 'P0' Xamarin Android Java Bindings for Thoughtbot ExpandableRecyclerView

Question

I am trying to create Xamarin Android bindings for this library, https://github.com/thoughtbot/expandable-recycler-view.

I have added the following to the Metadata.xml

<attr path="/api/package[@name='com.thoughtbot.expandablerecyclerview']/interface[@name='listeners.GroupExpandCollapseListener']/class[@name='models.ExpandableGroup']/field[@name='p0']" name="managedName">p0_2</attr>

but i still get the error and gives a warning that the xpath does not match any nodes.

Here is the file and field am trying to match :

namespace Com.Thoughtbot.Expandablerecyclerview.Listeners {

// Metadata.xml XPath interface reference: path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='GroupExpandCollapseListener']"
[Register ("com/thoughtbot/expandablerecyclerview/listeners/GroupExpandCollapseListener", "", "Com.Thoughtbot.Expandablerecyclerview.Listeners.IGroupExpandCollapseListenerInvoker")]
public partial interface IGroupExpandCollapseListener : IJavaObject {

    // Metadata.xml XPath method reference: path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='GroupExpandCollapseListener']/method[@name='onGroupCollapsed' and count(parameter)=1 and parameter[1][@type='com.thoughtbot.expandablerecyclerview.models.ExpandableGroup']]"
    [Register ("onGroupCollapsed", "(Lcom/thoughtbot/expandablerecyclerview/models/ExpandableGroup;)V", "GetOnGroupCollapsed_Lcom_thoughtbot_expandablerecyclerview_models_ExpandableGroup_Handler:Com.Thoughtbot.Expandablerecyclerview.Listeners.IGroupExpandCollapseListenerInvoker, ExpandableRecyclerViewBindingsLibrary")]
    void OnGroupCollapsed (global::Com.Thoughtbot.Expandablerecyclerview.Models.ExpandableGroup p0);

    // Metadata.xml XPath method reference: path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='GroupExpandCollapseListener']/method[@name='onGroupExpanded' and count(parameter)=1 and parameter[1][@type='com.thoughtbot.expandablerecyclerview.models.ExpandableGroup']]"
    [Register ("onGroupExpanded", "(Lcom/thoughtbot/expandablerecyclerview/models/ExpandableGroup;)V", "GetOnGroupExpanded_Lcom_thoughtbot_expandablerecyclerview_models_ExpandableGroup_Handler:Com.Thoughtbot.Expandablerecyclerview.Listeners.IGroupExpandCollapseListenerInvoker, ExpandableRecyclerViewBindingsLibrary")]
    void OnGroupExpanded (global::Com.Thoughtbot.Expandablerecyclerview.Models.ExpandableGroup p0);

}

public partial class GroupCollapsedEventArgs : global::System.EventArgs {

    public GroupCollapsedEventArgs (global::Com.Thoughtbot.Expandablerecyclerview.Models.ExpandableGroup p0)
    {
        this.p0 = p0;
    }

    global::Com.Thoughtbot.Expandablerecyclerview.Models.ExpandableGroup p0;
    public global::Com.Thoughtbot.Expandablerecyclerview.Models.ExpandableGroup P0 {
        get { return p0; }
    }
}

}

The duplicate is on this part :

global::Com.Thoughtbot.Expandablerecyclerview.Models.ExpandableGroup p0;
public global::Com.Thoughtbot.Expandablerecyclerview.Models.ExpandableGroup P0 {
    get { return p0; }
}

My question is what should my xpath look like in order to avoid the duplicate property definition for P0?

Did you find any solution, I am trying to use the same library? — Ultimo_m, Sep 14 '17 at 14:25
Yes i did, let me add as an answer since the xml is just big — Joseph, Sep 15 '17 at 13:23

score 3 · Answer 1 · answered Sep 15 '17 at 13:28

To answer my own question, when binding java libraries with Xamarin you will need to map the interfaces to events in .Net.

Adding the following into the Metadata.xml will map the interface to the events

 <attr path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='ExpandCollapseListener']/method[@name='onGroupExpanded']/parameter[1]" name="managedName">positionStart</attr>
  <attr path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='ExpandCollapseListener']/method[@name='onGroupExpanded']/parameter[2]" name="managedName">itemCount</attr>
  <attr path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='ExpandCollapseListener']/method[@name='onGroupCollapsed']/parameter[1]" name="managedName">positionStart</attr>
  <attr path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='ExpandCollapseListener']/method[@name='onGroupCollapsed']/parameter[2]" name="managedName">itemCount</attr>

  <attr path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='GroupExpandCollapseListener']/method[@name='onGroupExpanded']/parameter[1]" name="managedName">group</attr>
  <attr path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='GroupExpandCollapseListener']/method[@name='onGroupCollapsed']/parameter[1]" name="managedName">group</attr>

  <attr path="/api/package[@name='com.thoughtbot.expandablerecyclerview.listeners']/interface[@name='OnGroupClickListener']/method[@name='onGroupClick']/parameter[1]" name="managedName">flatPosition</attr>

Hi...I have the same issue Com.Wikitude.Tracker.IObjectTrackerListener.cs(47,47): Error CS0102: The type 'TargetsLoadedEventArgs' already contains a definition for 'p0' (CS0102) .....I tried to add P0 but not working — pritam001, Oct 13 '17 at 10:54
The `Com.Wikitude.Tracker` needs to be the Java package name not the C# namespace by the way. — Joseph, Oct 15 '17 at 09:28

The type 'GroupExpandedEventArgs' already contains a definition for 'P0' Xamarin Android Java Bindings for Thoughtbot ExpandableRecyclerView

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