JonDouglas

Approaching a Xamarin.Android Bindings Case

1. Investigation

One of the best ways to investigate a problematic Xamarin.Android Binding is to first ensure you have the proper tooling available:

• Diagnostic MSBuild Output Enabled(Instructions)
• Java Decompiler(http://jd.benow.ca/)
• .NET Decompiler(https://www.jetbrains.com/decompiler/)
• Binding SDK Documentation

ianhanniballake

package com.example.mediasessioncompat;

import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v4.media.MediaDescriptionCompat;
import android.support.v4.media.MediaMetadataCompat;
import android.support.v4.media.session.MediaButtonReceiver;
import android.support.v4.media.session.MediaControllerCompat;
import android.support.v4.media.session.MediaSessionCompat;

brendanzagaeski

<metadata>
  <!-- Error CS0234: The type or namespace name `QuadCorners' does not exist in the namespace `DE.Neom.Neoreadersdk'. Are you missing an assembly reference?
       
       This problem is caused by the default unspecified visibility of
       the QuadCorners Java class.

       Note in particular the very end of the following line from
       `obj/Debug/api.xml`:

       <class abstract="false" deprecated="not deprecated" extends="java.lang.Object" extends-generic-aware="java.lang.Object" final="false" name="QuadCorners" static="false" visibility="">

brendanzagaeski

<metadata>
	<!-- Some Metadata.xml fixes for binding the Socialize Android SDK (http://getsocialize.com/sdk/) in Xamarin.Android
	     Note that this is not a complete set of fixes. These changes only address the first round of compile errors. -->

	<!-- Fixes for duplicate EventArgs, as discussed on:
	     http://docs.xamarin.com/guides/android/advanced_topics/java_integration_overview/binding_a_java_library_(.jar)/#Problem_Duplicate_custom_EventArgs_types
	     Error message: Error CS0102: The type `SomeClass` already contains a definition for `p0' (CS0102) -->
	<attr path="/api/package[@name='com.socialize.auth.twitter']/interface[@name='TwitterAuthListener']/method[@name='onError' and count(parameter)=1 and parameter[1][@type='com.socialize.error.SocializeException']]" name="argsType">AuthTwitterErrorEventArgs</attr>
	<attr path="/api/package[@name='com.socialize.facebook']/interface[@name='Facebook.DialogListener']/method[@name='onComplete' and count(parameter)=1 and parameter[1][@type='android.os.Bundle