Add Kotlin files

Author: colemancda

Demo/app/src/main/java/com/pureswift/swiftandroid/ListViewAdapter.kt

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+package com.pureswift.swiftandroid
+
+import android.database.DataSetObserver
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ListAdapter
+
+class ListViewAdapter(val context: SwiftObject): ListAdapter {
+
+    external override fun getCount(): Int
+
+    external override fun isEmpty(): Boolean
+
+    external override fun getItem(position: Int): Any?
+
+    external override fun getItemId(position: Int): Long
+
+    external override fun getItemViewType(position: Int): Int
+
+    external override fun getViewTypeCount(): Int
+
+    external override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View?
+
+    external override fun areAllItemsEnabled(): Boolean
+
+    external override fun isEnabled(position: Int): Boolean
+
+    external override fun registerDataSetObserver(observer: DataSetObserver?)
+
+    external override fun unregisterDataSetObserver(observer: DataSetObserver?)
+
+    external override fun hasStableIds(): Boolean
+}

Demo/app/src/main/java/com/pureswift/swiftandroid/Runnable.kt

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+package com.pureswift.swiftandroid
+
+class Runnable(): java.lang.Runnable {
+
+    external override fun run()
+}

Demo/app/src/main/java/com/pureswift/swiftandroid/SwiftObject.kt

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+package com.pureswift.swiftandroid
+
+/// Swift object retained by JVM
+class SwiftObject(val swiftObject: Long, val type: String) {
+
+    override fun toString(): String {
+        return toStringSwift()
+    }
+
+    external fun toStringSwift(): String
+
+    fun finalize() {
+        finalizeSwift()
+    }
+
+    external fun finalizeSwift(): String
+}

Demo/app/src/main/java/com/pureswift/swiftandroid/ViewOnClickListener.kt

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+package com.pureswift.swiftandroid
+
+import android.view.View
+
+class ViewOnClickListener(val action: SwiftObject): View.OnClickListener {
+
+    external override fun onClick(view: View)
+}