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Some Metadata.xml fixes for binding NeoReaderSDK (http://www.neom.com/solutions/neoreader/SDK) in Xamarin.Android
<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="">
The fix is to change the visibility so the type is available in
the binding. -->
<attr path="/api/package[@name='de.neom.neoreadersdk']/class[@name='QuadCorners']" name="visibility">public</attr>
<!-- Error CS0234: The type or namespace name `Object' does not exist in the namespace `DE.Neom.Java.Lang'. Are you missing an assembly reference?
Example of the problem from a generated C# file:
`return (Java.Lang.Object) global::Java.Lang.Object.GetObject<global::Java.Lang.Object> (JNIEnv.CallObjectMethod (Handle, id_get), JniHandleOwnership.TransferLocalRef);`
The C# type `Java.Lang.Object` is by default resolved to:
`DE.Neom.Java.Lang.Object`.
The easiest fix is to rename the `DE.Neom.Java.Lang` namespace. -->
<attr path="/api/package[@name='de.neom.java.lang']" name="managedName">NeomJavaLang</attr>
<!-- Error CS0535: `DE.Neom.Neoreadersdk.Resolution' does not implement interface member `Java.Lang.IComparable.CompareTo(Java.Lang.Object)'
Looking in the generated C# file, we see:
`public virtual int CompareTo (global::DE.Neom.Neoreadersdk.Resolution p0)`
The problem in this case is related to generic type erasure.
The fix is to switch the parameter type to `Java.Lang.Object`. -->
<attr path="/api/package[@name='de.neom.neoreadersdk']/class[@name='Resolution']/method[@name='compareTo' and count(parameter)=1 and parameter[1][@type='de.neom.neoreadersdk.Resolution']]/parameter[1]" name="managedType">Java.Lang.Object</attr>
<!-- Warning J2XA001: missing class error was raised while reflecting de.neom.neoreadersdk.Viewfinder14View$AdView [public de.neom.neoreadersdk.Viewfinder14View$AdView(de.neom.neoreadersdk.Viewfinder14View,android.content.Context)] : de/neom/neoreadersdk/R
Warning J2XA001: missing class error was raised while reflecting de.neom.neoreadersdk.Viewfinder14View$AdView [public de.neom.neoreadersdk.Viewfinder14View$AdView(de.neom.neoreadersdk.Viewfinder14View,android.content.Context,android.util.AttributeSet)] : de/neom/neoreadersdk/R
This problem is caused by a limitation in the bindings generator.
See also: https://bugzilla.xamarin.com/show_bug.cgi?id=18154#c7
The workaround is to add the skipped XML nodes by hand. Note that
this workaround does _not_ stop the warnings from appearing in
the build output, but it _does_ make the methods available in the
final C# binding. -->
<add-node path="/api/package[@name='de.neom.neoreadersdk']/class[@name='Viewfinder14View.AdView']">
<constructor deprecated="not deprecated" final="false" name="Viewfinder14View.AdView" static="false" type="de.neom.neoreadersdk.Viewfinder14View.AdView" visibility="public">
<parameter name="viewFinder" type="de.neom.neoreadersdk.Viewfinder14View" />
<parameter name="context" type="android.content.Context" />
</constructor>
<constructor deprecated="not deprecated" final="false" name="Viewfinder14View.AdView" static="false" type="de.neom.neoreadersdk.Viewfinder14View.AdView" visibility="public">
<parameter name="viewFinder" type="de.neom.neoreadersdk.Viewfinder14View" />
<parameter name="context" type="android.content.Context" />
<parameter name="attributeSet" type="android.util.AttributeSet" />
</constructor>
</add-node>
<!---Warning J2XA001: missing class error was raised while reflecting de.neom.neoreadersdk.Viewfinder14View$DecodeThread [public de.neom.neoreadersdk.Viewfinder14View$DecodeThread(de.neom.neoreadersdk.Viewfinder14View,android.content.Context)] : de/neom/neoreadersdk/R -->
<add-node path="/api/package[@name='de.neom.neoreadersdk']/class[@name='Viewfinder14View.DecodeThread']">
<constructor deprecated="not deprecated" final="false" name="Viewfinder14View.DecodeThread" static="false" type="de.neom.neoreadersdk.Viewfinder14View.DecodeThread" visibility="public">
<parameter name="viewFinder" type="de.neom.neoreadersdk.Viewfinder14View" />
<parameter name="context" type="android.content.Context" />
</constructor>
</add-node>
<!---Warning J2XA001: missing class error was raised while reflecting de.neom.neoreadersdk.Viewfinder14View$DrawView [public de.neom.neoreadersdk.Viewfinder14View$DrawView(de.neom.neoreadersdk.Viewfinder14View,android.content.Context)] : de/neom/neoreadersdk/R
Warning J2XA001: missing class error was raised while reflecting de.neom.neoreadersdk.Viewfinder14View$DrawView [public de.neom.neoreadersdk.Viewfinder14View$DrawView(de.neom.neoreadersdk.Viewfinder14View,android.content.Context,android.util.AttributeSet)] : de/neom/neoreadersdk/R -->
<add-node path="/api/package[@name='de.neom.neoreadersdk']/class[@name='Viewfinder14View.DrawView']">
<constructor deprecated="not deprecated" final="false" name="Viewfinder14View.DrawView" static="false" type="de.neom.neoreadersdk.Viewfinder14View.DrawView" visibility="public">
<parameter name="viewFinder" type="de.neom.neoreadersdk.Viewfinder14View" />
<parameter name="context" type="android.content.Context" />
</constructor>
<constructor deprecated="not deprecated" final="false" name="Viewfinder14View.DrawView" static="false" type="de.neom.neoreadersdk.Viewfinder14View.DrawView" visibility="public">
<parameter name="viewFinder" type="de.neom.neoreadersdk.Viewfinder14View" />
<parameter name="context" type="android.content.Context" />
<parameter name="attributeSet" type="android.util.AttributeSet" />
</constructor>
</add-node>
<!-- Warning J2XA001: missing class error was raised while reflecting de.neom.neoreadersdk.Viewfinder5View$AdView [public de.neom.neoreadersdk.Viewfinder5View$AdView(de.neom.neoreadersdk.Viewfinder5View,android.content.Context)] : de/neom/neoreadersdk/R
Warning J2XA001: missing class error was raised while reflecting de.neom.neoreadersdk.Viewfinder5View$AdView [public de.neom.neoreadersdk.Viewfinder5View$AdView(de.neom.neoreadersdk.Viewfinder5View,android.content.Context,android.util.AttributeSet)] : de/neom/neoreadersdk/R -->
<add-node path="/api/package[@name='de.neom.neoreadersdk']/class[@name='Viewfinder5View.AdView']">
<constructor deprecated="not deprecated" final="false" name="Viewfinder5View.AdView" static="false" type="de.neom.neoreadersdk.Viewfinder5View.AdView" visibility="public">
<parameter name="viewFinder" type="de.neom.neoreadersdk.Viewfinder5View" />
<parameter name="context" type="android.content.Context" />
</constructor>
<constructor deprecated="not deprecated" final="false" name="Viewfinder5View.AdView" static="false" type="de.neom.neoreadersdk.Viewfinder5View.AdView" visibility="public">
<parameter name="viewFinder" type="de.neom.neoreadersdk.Viewfinder5View" />
<parameter name="context" type="android.content.Context" />
<parameter name="attributeSet" type="android.util.AttributeSet" />
</constructor>
</add-node>
<!-- Warning J2XA001: missing class error was raised while reflecting de.neom.neoreadersdk.Viewfinder5View$DrawView [public de.neom.neoreadersdk.Viewfinder5View$DrawView(de.neom.neoreadersdk.Viewfinder5View,android.content.Context)] : de/neom/neoreadersdk/R
Warning J2XA001: missing class error was raised while reflecting de.neom.neoreadersdk.Viewfinder5View$DrawView [public de.neom.neoreadersdk.Viewfinder5View$DrawView(de.neom.neoreadersdk.Viewfinder5View,android.content.Context,android.util.AttributeSet)] : de/neom/neoreadersdk/R -->
<add-node path="/api/package[@name='de.neom.neoreadersdk']/class[@name='Viewfinder5View.DrawView']">
<constructor deprecated="not deprecated" final="false" name="Viewfinder5View.DrawView" static="false" type="de.neom.neoreadersdk.Viewfinder5View.DrawView" visibility="public">
<parameter name="viewFinder" type="de.neom.neoreadersdk.Viewfinder5View" />
<parameter name="context" type="android.content.Context" />
</constructor>
<constructor deprecated="not deprecated" final="false" name="Viewfinder5View.DrawView" static="false" type="de.neom.neoreadersdk.Viewfinder5View.DrawView" visibility="public">
<parameter name="viewFinder" type="de.neom.neoreadersdk.Viewfinder5View" />
<parameter name="context" type="android.content.Context" />
<parameter name="attributeSet" type="android.util.AttributeSet" />
</constructor>
</add-node>
</metadata>

Hi - have you gotten neoreader SDK working with xamarin? We are considering this for a new project and I would like to know if this is a good idea - the idea would be to start with a windows mobile app and later possibly add support for android and ios while sharing the common code base.

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