Replace page fragments with views

app/src/main/java/eu/kanade/tachiyomi/widget/ViewPagerAdapter.kt

@@ -0,0 +1,30 @@
+package eu.kanade.tachiyomi.widget
+
+import android.support.v4.view.PagerAdapter
+import android.view.View
+import android.view.ViewGroup
+
+abstract class ViewPagerAdapter : PagerAdapter() {
+
+    protected abstract fun createView(container: ViewGroup, position: Int): View
+
+    protected open fun destroyView(container: ViewGroup, position: Int, view: View) {
+    }
+
+    override fun instantiateItem(container: ViewGroup, position: Int): Any {
+        val view = createView(container, position)
+        container.addView(view)
+        return view
+    }
+
+    override fun destroyItem(container: ViewGroup, position: Int, obj: Any) {
+        val view = obj as View
+        destroyView(container, position, view)
+        container.removeView(view)
+    }
+
+    override fun isViewFromObject(view: View, obj: Any): Boolean {
+        return view === obj
+    }
+
+}