Advanced Xamarin Bindings Case Study – Android Part 1

[global::Android.Runtime.Register (“com/vanniktech/emoji/EmojiReplacer”, DoNotGenerateAcw=true)]
    internal class IEmojiReplacerInvoker : global::Java.Lang.Object, IEmojiReplacer {

        static IntPtr java_class_ref = JNIEnv.FindClass (“com/vanniktech/emoji/EmojiReplacer”);

        protected override IntPtr ThresholdClass {
            get { return class_ref; }
        }

        protected override global::System.Type ThresholdType {
            get { return typeof (IEmojiReplacerInvoker); }
        }

        IntPtr class_ref;
 

        static IntPtr Validate (IntPtr handle)
        {
            if (!JNIEnv.IsInstanceOf (handle, java_class_ref))
                throw new InvalidCastException (string.Format (“Unable to convert instance of type ‘{0}’ to type ‘{1}’.”,
                            JNIEnv.GetClassNameFromInstance (handle), “com.vanniktech.emoji.EmojiReplacer”));
            return handle;
        }

        protected override void Dispose (bool disposing)
        {
            if (this.class_ref != IntPtr.Zero)
                JNIEnv.DeleteGlobalRef (this.class_ref);
            this.class_ref = IntPtr.Zero;
            base.Dispose (disposing);
        }

        public IEmojiReplacerInvoker(IntPtr handle, JniHandleOwnership transfer) : base (Validate (handle), transfer)
        {
            IntPtr local_ref = JNIEnv.GetObjectClass (((global::Java.Lang.Object) this).Handle);
            this.class_ref = JNIEnv.NewGlobalRef (local_ref);
            JNIEnv.DeleteLocalRef (local_ref);
        }
        
        static IntPtr _replaceWithImagesMethodPointer;
        
        
        [Register (“replaceWithImages”, “(Landroid/content/Context;Landroid/text/Spannable;FFLcom/vanniktech/emoji/EmojiReplacer;)V”, “”)]
        public virtual unsafe void ReplaceWithImages(Context context, ISpannable text, float emojiSize, float defaultEmojiSize,
            IEmojiReplacer fallback)
        {
            if (_replaceWithImagesMethodPointer == IntPtr.Zero)
                _replaceWithImagesMethodPointer = JNIEnv.GetStaticMethodID (class_ref, “replaceWithImages”, “(Lcom/vanniktech/emoji/EmojiReplacer;)V”);
            try
            {
                JValue* __args = stackalloc JValue[5];
                __args[0] = new JValue(context);
                __args[1] = new JValue(text);
                __args[2] = new JValue(emojiSize);
                __args[3] = new JValue(defaultEmojiSize);
                __args[4] = new JValue(fallback);
                JNIEnv.CallVoidMethod((this).Handle, _replaceWithImagesMethodPointer, __args);
            } finally 
            {
            }        
        }
    }