move hasNavBar into an activity extension

app/src/main/kotlin/com/simplemobiletools/gallery/Utils.kt

@@ -1,14 +1,8 @@
 package com.simplemobiletools.gallery
 
-import android.app.Activity
 import android.content.Context
 import android.content.res.Resources
-import android.os.Build
-import android.util.DisplayMetrics
 import android.util.TypedValue
-import android.view.KeyCharacterMap
-import android.view.KeyEvent
-import android.view.ViewConfiguration
 
 class Utils {
     companion object {
@@ -36,29 +30,5 @@ class Utils {
             } else
                 0
         }
-
-        fun hasNavBar(act: Activity): Boolean {
-            return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
-                val display = act.windowManager.defaultDisplay
-
-                val realDisplayMetrics = DisplayMetrics()
-                display.getRealMetrics(realDisplayMetrics)
-
-                val realHeight = realDisplayMetrics.heightPixels
-                val realWidth = realDisplayMetrics.widthPixels
-
-                val displayMetrics = DisplayMetrics()
-                display.getMetrics(displayMetrics)
-
-                val displayHeight = displayMetrics.heightPixels
-                val displayWidth = displayMetrics.widthPixels
-
-                realWidth - displayWidth > 0 || realHeight - displayHeight > 0
-            } else {
-                val hasMenuKey = ViewConfiguration.get(act).hasPermanentMenuKey()
-                val hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK)
-                !hasMenuKey && !hasBackKey
-            }
-        }
     }
 }

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/activity.kt

@@ -3,6 +3,11 @@ package com.simplemobiletools.gallery.extensions
 import android.app.Activity
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
+import android.util.DisplayMetrics
+import android.view.KeyCharacterMap
+import android.view.KeyEvent
+import android.view.ViewConfiguration
 import com.simplemobiletools.filepicker.extensions.toast
 import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.REQUEST_SET_WALLPAPER
@@ -61,3 +66,27 @@ fun Activity.openWith(file: File) {
         toast(R.string.no_app_found)
     }
 }
+
+fun Activity.hasNavBar(): Boolean {
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+        val display = windowManager.defaultDisplay
+
+        val realDisplayMetrics = DisplayMetrics()
+        display.getRealMetrics(realDisplayMetrics)
+
+        val realHeight = realDisplayMetrics.heightPixels
+        val realWidth = realDisplayMetrics.widthPixels
+
+        val displayMetrics = DisplayMetrics()
+        display.getMetrics(displayMetrics)
+
+        val displayHeight = displayMetrics.heightPixels
+        val displayWidth = displayMetrics.widthPixels
+
+        realWidth - displayWidth > 0 || realHeight - displayHeight > 0
+    } else {
+        val hasMenuKey = ViewConfiguration.get(this).hasPermanentMenuKey()
+        val hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK)
+        !hasMenuKey && !hasBackKey
+    }
+}

app/src/main/kotlin/com/simplemobiletools/gallery/fragments/VideoFragment.kt

@@ -17,6 +17,7 @@ import com.simplemobiletools.gallery.Config
 import com.simplemobiletools.gallery.MEDIUM
 import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.Utils
+import com.simplemobiletools.gallery.extensions.hasNavBar
 import com.simplemobiletools.gallery.models.Medium
 import kotlinx.android.synthetic.main.pager_video_item.view.*
 import java.io.IOException
@@ -112,7 +113,7 @@ class VideoFragment : ViewPagerFragment(), View.OnClickListener, SurfaceHolder.C
         var right = res.getDimension(R.dimen.timer_padding).toInt()
         var bottom = 0
 
-        if (Utils.hasNavBar(activity)) {
+        if (activity.hasNavBar()) {
             if (res.configuration.orientation == Configuration.ORIENTATION_PORTRAIT) {
                 bottom += height
             } else {