move mypageradapter to the proper folder

app/src/main/kotlin/com/simplemobiletools/gallery/adapters/MyPagerAdapter.kt

@@ -0,0 +1,67 @@
+package com.simplemobiletools.gallery.adapters
+
+import android.os.Bundle
+import android.support.v4.app.Fragment
+import android.support.v4.app.FragmentManager
+import android.support.v4.app.FragmentStatePagerAdapter
+import android.util.SparseArray
+import com.simplemobiletools.gallery.Constants
+import com.simplemobiletools.gallery.activities.ViewPagerActivity
+import com.simplemobiletools.gallery.fragments.PhotoFragment
+import com.simplemobiletools.gallery.fragments.VideoFragment
+import com.simplemobiletools.gallery.fragments.ViewPagerFragment
+import com.simplemobiletools.gallery.models.Medium
+
+class MyPagerAdapter(val activity: ViewPagerActivity, fm: FragmentManager, val media: MutableList<Medium>) : FragmentStatePagerAdapter(fm) {
+    private val mFragments: SparseArray<ViewPagerFragment>
+
+    init {
+        mFragments = SparseArray<ViewPagerFragment>()
+    }
+
+    override fun getCount(): Int {
+        return media.size
+    }
+
+    override fun getItem(position: Int): Fragment {
+        val medium = media[position]
+        val bundle = Bundle()
+        bundle.putSerializable(Constants.MEDIUM, medium)
+        val fragment: ViewPagerFragment
+
+        if (medium.isVideo) {
+            fragment = VideoFragment()
+        } else {
+            fragment = PhotoFragment()
+        }
+
+        mFragments.put(position, fragment)
+        fragment.arguments = bundle
+        fragment.setListener(activity)
+        return fragment
+    }
+
+    fun itemDragged(pos: Int) {
+        mFragments[pos]?.itemDragged()
+    }
+
+    fun updateUiVisibility(isFullscreen: Boolean, pos: Int) {
+        for (i in -1..1) {
+            val fragment = mFragments[pos + i]
+            fragment?.systemUiVisibilityChanged(isFullscreen)
+        }
+    }
+
+    fun updateItems(pos: Int) {
+        for (i in -1..1) {
+            val fragment = mFragments[pos + i]
+            fragment?.updateItem()
+        }
+    }
+
+    fun updateItems(newPaths: List<Medium>) {
+        media.clear()
+        media.addAll(newPaths)
+        notifyDataSetChanged()
+    }
+}