replace MEDIUM constant with PATH in some intents

app/src/main/kotlin/com/simplemobiletools/gallery/activities/MediaActivity.kt

@@ -506,7 +506,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
                 openFile(Uri.fromFile(file), false)
             } else {
                 Intent(this, ViewPagerActivity::class.java).apply {
-                    putExtra(MEDIUM, path)
+                    putExtra(PATH, path)
                     putExtra(SHOW_ALL, mShowAll)
                     startActivity(this)
                 }

app/src/main/kotlin/com/simplemobiletools/gallery/activities/PhotoVideoActivity.kt

@@ -23,6 +23,7 @@ import com.simplemobiletools.gallery.fragments.ViewPagerFragment
 import com.simplemobiletools.gallery.helpers.IS_FROM_GALLERY
 import com.simplemobiletools.gallery.helpers.IS_VIEW_INTENT
 import com.simplemobiletools.gallery.helpers.MEDIUM
+import com.simplemobiletools.gallery.helpers.PATH
 import com.simplemobiletools.gallery.models.Medium
 import kotlinx.android.synthetic.main.fragment_holder.*
 import java.io.File
@@ -108,7 +109,7 @@ open class PhotoVideoActivity : SimpleActivity(), ViewPagerFragment.FragmentList
         Intent(this, ViewPagerActivity::class.java).apply {
             putExtra(IS_VIEW_INTENT, true)
             putExtra(IS_FROM_GALLERY, mIsFromGallery)
-            putExtra(MEDIUM, path)
+            putExtra(PATH, path)
             startActivity(this)
         }
     }

app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt

@@ -101,7 +101,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             }
         } else {
             try {
-                mPath = intent.getStringExtra(MEDIUM)
+                mPath = intent.getStringExtra(PATH)
                 mShowAll = config.showAll
             } catch (e: Exception) {
                 showErrorToast(e)

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

@@ -23,10 +23,10 @@ class MyPagerAdapter(val activity: ViewPagerActivity, fm: FragmentManager, val m
         bundle.putSerializable(MEDIUM, medium)
         val fragment: ViewPagerFragment
 
-        if (medium.video) {
-            fragment = VideoFragment()
+        fragment = if (medium.video) {
+            VideoFragment()
         } else {
-            fragment = PhotoFragment()
+            PhotoFragment()
         }
 
         fragment.arguments = bundle

app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Constants.kt

@@ -59,6 +59,7 @@ val NOMEDIA = ".nomedia"
 
 val DIRECTORY = "directory"
 val MEDIUM = "medium"
+val PATH = "path"
 val GET_IMAGE_INTENT = "get_image_intent"
 val GET_VIDEO_INTENT = "get_video_intent"
 val GET_ANY_INTENT = "get_any_intent"