diff --git a/app/src/main/java/com/simplemobiletools/gallery/Utils.java b/app/src/main/java/com/simplemobiletools/gallery/Utils.java
deleted file mode 100644
index e251b1b5b..000000000
--- a/app/src/main/java/com/simplemobiletools/gallery/Utils.java
+++ /dev/null
@@ -1,153 +0,0 @@
-package com.simplemobiletools.gallery;
-
-import android.Manifest;
-import android.app.Activity;
-import android.content.Context;
-import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.content.res.Resources;
-import android.database.Cursor;
-import android.net.Uri;
-import android.os.Build;
-import android.provider.MediaStore;
-import android.support.v4.content.ContextCompat;
-import android.support.v7.app.ActionBar;
-import android.util.DisplayMetrics;
-import android.util.TypedValue;
-import android.view.Display;
-import android.view.KeyCharacterMap;
-import android.view.KeyEvent;
-import android.view.View;
-import android.view.ViewConfiguration;
-import android.view.Window;
-import android.webkit.MimeTypeMap;
-import android.widget.Toast;
-
-import com.simplemobiletools.gallery.models.Medium;
-
-import java.io.File;
-
-public class Utils {
-    public static String getFilename(final String path) {
-        return path.substring(path.lastIndexOf("/") + 1);
-    }
-
-    public static void showToast(Context context, int resId) {
-        Toast.makeText(context, context.getResources().getString(resId), Toast.LENGTH_SHORT).show();
-    }
-
-    public static int getActionBarHeight(Context context, Resources res) {
-        final TypedValue tv = new TypedValue();
-        int height = 0;
-        if (context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
-            height = TypedValue.complexToDimensionPixelSize(tv.data, res.getDisplayMetrics());
-        }
-        return height;
-    }
-
-    public static int getStatusBarHeight(Resources res) {
-        int id = res.getIdentifier("status_bar_height", "dimen", "android");
-        if (id > 0) {
-            return res.getDimensionPixelSize(id);
-        }
-        return 0;
-    }
-
-    public static int getNavBarHeight(Resources res) {
-        int id = res.getIdentifier("navigation_bar_height", "dimen", "android");
-        if (id > 0) {
-            return res.getDimensionPixelSize(id);
-        }
-        return 0;
-    }
-
-    public static boolean hasNavBar(Activity act) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
-            Display display = act.getWindowManager().getDefaultDisplay();
-
-            DisplayMetrics realDisplayMetrics = new DisplayMetrics();
-            display.getRealMetrics(realDisplayMetrics);
-
-            int realHeight = realDisplayMetrics.heightPixels;
-            int realWidth = realDisplayMetrics.widthPixels;
-
-            DisplayMetrics displayMetrics = new DisplayMetrics();
-            display.getMetrics(displayMetrics);
-
-            int displayHeight = displayMetrics.heightPixels;
-            int displayWidth = displayMetrics.widthPixels;
-
-            return (realWidth - displayWidth) > 0 || (realHeight - displayHeight) > 0;
-        } else {
-            boolean hasMenuKey = ViewConfiguration.get(act).hasPermanentMenuKey();
-            boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
-            return !hasMenuKey && !hasBackKey;
-        }
-    }
-
-    public static boolean hasStoragePermission(Context cxt) {
-        return ContextCompat.checkSelfPermission(cxt, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
-    }
-
-    public static String getMimeType(String url) {
-        final String extension = MimeTypeMap.getFileExtensionFromUrl(url);
-        if (extension != null) {
-            return MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
-        }
-        return "";
-    }
-
-    public static void shareMedium(Medium medium, Activity activity) {
-        final String shareTitle = activity.getResources().getString(R.string.share_via);
-        final Intent intent = new Intent();
-        final File file = new File(medium.getPath());
-        final Uri uri = Uri.fromFile(file);
-        intent.setAction(Intent.ACTION_SEND);
-        intent.putExtra(Intent.EXTRA_STREAM, uri);
-        intent.setType(getMimeType(medium));
-        activity.startActivity(Intent.createChooser(intent, shareTitle));
-    }
-
-    public static String getMimeType(Medium medium) {
-        if (medium.getIsVideo())
-            return "video/*";
-        else
-            return "image/*";
-    }
-
-    public static void showSystemUI(ActionBar actionbar, Window window) {
-        if (actionbar != null)
-            actionbar.show();
-
-        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
-                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
-                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
-    }
-
-    public static void hideSystemUI(ActionBar actionbar, Window window) {
-        if (actionbar != null)
-            actionbar.hide();
-
-        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
-                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
-                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
-                View.SYSTEM_UI_FLAG_LOW_PROFILE |
-                View.SYSTEM_UI_FLAG_FULLSCREEN |
-                View.SYSTEM_UI_FLAG_IMMERSIVE);
-    }
-
-    public static String getRealPathFromURI(Context context, Uri uri) {
-        Cursor cursor = null;
-        try {
-            String[] projection = {MediaStore.Images.Media.DATA};
-            cursor = context.getContentResolver().query(uri, projection, null, null, null);
-            int index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
-            cursor.moveToFirst();
-            return cursor.getString(index);
-        } finally {
-            if (cursor != null) {
-                cursor.close();
-            }
-        }
-    }
-}
diff --git a/app/src/main/java/com/simplemobiletools/gallery/Utils.kt b/app/src/main/java/com/simplemobiletools/gallery/Utils.kt
new file mode 100644
index 000000000..004f29b7e
--- /dev/null
+++ b/app/src/main/java/com/simplemobiletools/gallery/Utils.kt
@@ -0,0 +1,139 @@
+package com.simplemobiletools.gallery
+
+import android.Manifest
+import android.app.Activity
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.content.res.Resources
+import android.database.Cursor
+import android.net.Uri
+import android.os.Build
+import android.provider.MediaStore
+import android.support.v4.content.ContextCompat
+import android.support.v7.app.ActionBar
+import android.util.DisplayMetrics
+import android.util.TypedValue
+import android.view.*
+import android.webkit.MimeTypeMap
+import android.widget.Toast
+import com.simplemobiletools.gallery.models.Medium
+import java.io.File
+
+class Utils {
+    companion object {
+        fun getFilename(path: String): String {
+            return path.substring(path.lastIndexOf("/") + 1)
+        }
+
+        fun showToast(context: Context, resId: Int) {
+            Toast.makeText(context, context.resources.getString(resId), Toast.LENGTH_SHORT).show()
+        }
+
+        fun getActionBarHeight(context: Context, res: Resources): Int {
+            val tv = TypedValue()
+            var height = 0
+            if (context.theme.resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
+                height = TypedValue.complexToDimensionPixelSize(tv.data, res.displayMetrics)
+            }
+            return height
+        }
+
+        fun getStatusBarHeight(res: Resources): Int {
+            val id = res.getIdentifier("status_bar_height", "dimen", "android")
+            return if (id > 0) {
+                res.getDimensionPixelSize(id)
+            } else
+                0
+        }
+
+        fun getNavBarHeight(res: Resources): Int {
+            val id = res.getIdentifier("navigation_bar_height", "dimen", "android")
+            return if (id > 0) {
+                res.getDimensionPixelSize(id)
+            } 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
+            }
+        }
+
+        fun hasStoragePermission(cxt: Context): Boolean {
+            return ContextCompat.checkSelfPermission(cxt, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
+        }
+
+        fun getMimeType(url: String): String {
+            val extension = MimeTypeMap.getFileExtensionFromUrl(url)
+            return if (extension != null) {
+                MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension)
+            } else
+                ""
+        }
+
+        fun shareMedium(medium: Medium, activity: Activity) {
+            val shareTitle = activity.resources.getString(R.string.share_via)
+            val intent = Intent()
+            val file = File(medium.path)
+            val uri = Uri.fromFile(file)
+            intent.action = Intent.ACTION_SEND
+            intent.putExtra(Intent.EXTRA_STREAM, uri)
+            intent.type = getMimeType(medium)
+            activity.startActivity(Intent.createChooser(intent, shareTitle))
+        }
+
+        fun getMimeType(medium: Medium) = if (medium.isVideo) "video/*" else "image/*"
+
+        fun showSystemUI(actionbar: ActionBar?, window: Window) {
+            actionbar?.show()
+
+            window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
+                    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
+                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+        }
+
+        fun hideSystemUI(actionbar: ActionBar?, window: Window) {
+            actionbar?.hide()
+
+            window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
+                    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
+                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or
+                    View.SYSTEM_UI_FLAG_LOW_PROFILE or
+                    View.SYSTEM_UI_FLAG_FULLSCREEN or
+                    View.SYSTEM_UI_FLAG_IMMERSIVE
+        }
+
+        fun getRealPathFromURI(context: Context, uri: Uri): String {
+            var cursor: Cursor? = null
+            try {
+                val projection = arrayOf(MediaStore.Images.Media.DATA)
+                cursor = context.contentResolver.query(uri, projection, null, null, null)
+                val index = cursor!!.getColumnIndexOrThrow(MediaStore.Images.Media.DATA)
+                cursor.moveToFirst()
+                return cursor.getString(index)
+            } finally {
+                cursor?.close()
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/com/simplemobiletools/gallery/activities/MainActivity.java b/app/src/main/java/com/simplemobiletools/gallery/activities/MainActivity.java
index 1520a9990..253aa3447 100644
--- a/app/src/main/java/com/simplemobiletools/gallery/activities/MainActivity.java
+++ b/app/src/main/java/com/simplemobiletools/gallery/activities/MainActivity.java
@@ -148,7 +148,7 @@ public class MainActivity extends SimpleActivity
     }
 
     private void tryloadGallery() {
-        if (Utils.hasStoragePermission(getApplicationContext())) {
+        if (Utils.Companion.hasStoragePermission(getApplicationContext())) {
             getDirectories();
         } else {
             ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, STORAGE_PERMISSION);
@@ -163,7 +163,7 @@ public class MainActivity extends SimpleActivity
             if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                 getDirectories();
             } else {
-                Utils.showToast(getApplicationContext(), R.string.no_permissions);
+                Utils.Companion.showToast(getApplicationContext(), R.string.no_permissions);
                 finish();
             }
         }
@@ -183,7 +183,7 @@ public class MainActivity extends SimpleActivity
     }
 
     private void prepareForDeleting() {
-        Utils.showToast(this, R.string.deleting);
+        Utils.Companion.showToast(this, R.string.deleting);
         final SparseBooleanArray items = mGridView.getCheckedItemPositions();
         final int cnt = items.size();
         int deletedCnt = 0;
@@ -307,7 +307,7 @@ public class MainActivity extends SimpleActivity
                 final String newDirName = dirNameET.getText().toString().trim();
 
                 if (newDirName.isEmpty()) {
-                    Utils.showToast(getApplicationContext(), R.string.rename_folder_empty);
+                    Utils.Companion.showToast(getApplicationContext(), R.string.rename_folder_empty);
                     return;
                 }
 
@@ -316,7 +316,7 @@ public class MainActivity extends SimpleActivity
 
                 final File newDir = new File(dir.getParent(), newDirName);
                 if (dir.renameTo(newDir)) {
-                    Utils.showToast(getApplicationContext(), R.string.renaming_folder);
+                    Utils.Companion.showToast(getApplicationContext(), R.string.renaming_folder);
                     alertDialog.dismiss();
                     mActionMode.finish();
 
@@ -335,7 +335,7 @@ public class MainActivity extends SimpleActivity
                                 }
                             });
                 } else {
-                    Utils.showToast(getApplicationContext(), R.string.rename_folder_error);
+                    Utils.Companion.showToast(getApplicationContext(), R.string.rename_folder_error);
                 }
             }
         });
@@ -404,7 +404,7 @@ public class MainActivity extends SimpleActivity
                 final String path = data.getData().getPath();
                 final Uri uri = Uri.fromFile(new File(path));
                 if (mIsGetImageContentIntent || mIsGetVideoContentIntent || mIsGetAnyContentIntent) {
-                    final String type = Utils.getMimeType(path);
+                    final String type = Utils.Companion.getMimeType(path);
                     result.setDataAndTypeAndNormalize(uri, type);
                     result.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
                 } else if (mIsPickImageIntent || mIsPickVideoIntent) {
@@ -556,7 +556,7 @@ public class MainActivity extends SimpleActivity
             runOnUiThread(new Runnable() {
                 @Override
                 public void run() {
-                    Utils.showToast(getApplicationContext(), R.string.rename_folder_ok);
+                    Utils.Companion.showToast(getApplicationContext(), R.string.rename_folder_ok);
                 }
             });
         }
diff --git a/app/src/main/java/com/simplemobiletools/gallery/activities/MediaActivity.java b/app/src/main/java/com/simplemobiletools/gallery/activities/MediaActivity.java
index 4b421ae32..f9e5ffcb8 100644
--- a/app/src/main/java/com/simplemobiletools/gallery/activities/MediaActivity.java
+++ b/app/src/main/java/com/simplemobiletools/gallery/activities/MediaActivity.java
@@ -100,7 +100,7 @@ public class MediaActivity extends SimpleActivity
     }
 
     private void tryloadGallery() {
-        if (Utils.hasStoragePermission(getApplicationContext())) {
+        if (Utils.Companion.hasStoragePermission(getApplicationContext())) {
             initializeGallery();
         } else {
             finish();
@@ -124,7 +124,7 @@ public class MediaActivity extends SimpleActivity
         mGridView.setOnTouchListener(this);
         mIsSnackbarShown = false;
 
-        final String dirName = Utils.getFilename(mPath);
+        final String dirName = Utils.Companion.getFilename(mPath);
         setTitle(dirName);
     }
 
@@ -257,7 +257,7 @@ public class MediaActivity extends SimpleActivity
     private void shareMedia() {
         final List<Medium> selectedMedia = getSelectedMedia();
         if (selectedMedia.size() <= 1) {
-            Utils.shareMedium(selectedMedia.get(0), this);
+            Utils.Companion.shareMedium(selectedMedia.get(0), this);
         } else {
             shareMedia(selectedMedia);
         }
@@ -292,7 +292,7 @@ public class MediaActivity extends SimpleActivity
     }
 
     private void prepareForDeleting() {
-        Utils.showToast(this, R.string.deleting);
+        Utils.Companion.showToast(this, R.string.deleting);
         final SparseBooleanArray items = mGridView.getCheckedItemPositions();
         final int cnt = items.size();
         int deletedCnt = 0;
@@ -393,7 +393,7 @@ public class MediaActivity extends SimpleActivity
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
         final String curItemPath = mMedia.get(position).getPath();
         if (isSetWallpaperIntent()) {
-            Utils.showToast(this, R.string.setting_wallpaper);
+            Utils.Companion.showToast(this, R.string.setting_wallpaper);
 
             final int wantedWidth = getWallpaperDesiredMinimumWidth();
             final int wantedHeight = getWallpaperDesiredMinimumHeight();
diff --git a/app/src/main/java/com/simplemobiletools/gallery/activities/PhotoVideoActivity.java b/app/src/main/java/com/simplemobiletools/gallery/activities/PhotoVideoActivity.java
index b83179c28..4e7d587be 100644
--- a/app/src/main/java/com/simplemobiletools/gallery/activities/PhotoVideoActivity.java
+++ b/app/src/main/java/com/simplemobiletools/gallery/activities/PhotoVideoActivity.java
@@ -52,7 +52,7 @@ public class PhotoVideoActivity extends SimpleActivity implements ViewPagerFragm
             getSupportFragmentManager().beginTransaction().replace(R.id.fragment_holder, mFragment).commit();
         }
         hideSystemUI();
-        setTitle(Utils.getFilename(mUri.toString()));
+        setTitle(Utils.Companion.getFilename(mUri.toString()));
     }
 
     @Override
@@ -98,10 +98,10 @@ public class PhotoVideoActivity extends SimpleActivity implements ViewPagerFragm
     }
 
     private void hideSystemUI() {
-        Utils.hideSystemUI(mActionbar, getWindow());
+        Utils.Companion.hideSystemUI(mActionbar, getWindow());
     }
 
     private void showSystemUI() {
-        Utils.showSystemUI(mActionbar, getWindow());
+        Utils.Companion.showSystemUI(mActionbar, getWindow());
     }
 }
diff --git a/app/src/main/java/com/simplemobiletools/gallery/activities/ViewPagerActivity.java b/app/src/main/java/com/simplemobiletools/gallery/activities/ViewPagerActivity.java
index 2b9429ba6..446ebef0f 100644
--- a/app/src/main/java/com/simplemobiletools/gallery/activities/ViewPagerActivity.java
+++ b/app/src/main/java/com/simplemobiletools/gallery/activities/ViewPagerActivity.java
@@ -63,7 +63,7 @@ public class ViewPagerActivity extends SimpleActivity
         setContentView(R.layout.activity_medium);
         ButterKnife.bind(this);
 
-        if (!Utils.hasStoragePermission(getApplicationContext())) {
+        if (!Utils.Companion.hasStoragePermission(getApplicationContext())) {
             finish();
             return;
         }
@@ -89,7 +89,7 @@ public class ViewPagerActivity extends SimpleActivity
         }
 
         if (mPath == null || mPath.isEmpty()) {
-            Utils.showToast(getApplicationContext(), R.string.unknown_error);
+            Utils.Companion.showToast(getApplicationContext(), R.string.unknown_error);
             finish();
             return;
         }
@@ -121,7 +121,7 @@ public class ViewPagerActivity extends SimpleActivity
     @Override
     protected void onResume() {
         super.onResume();
-        if (!Utils.hasStoragePermission(getApplicationContext())) {
+        if (!Utils.Companion.hasStoragePermission(getApplicationContext())) {
             finish();
         }
     }
@@ -188,7 +188,7 @@ public class ViewPagerActivity extends SimpleActivity
         if (intent.resolveActivity(getPackageManager()) != null) {
             startActivityForResult(chooser, EDIT_IMAGE);
         } else {
-            Utils.showToast(getApplicationContext(), R.string.no_editor_found);
+            Utils.Companion.showToast(getApplicationContext(), R.string.no_editor_found);
         }
     }
 
@@ -200,19 +200,19 @@ public class ViewPagerActivity extends SimpleActivity
         if (intent.resolveActivity(getPackageManager()) != null) {
             startActivityForResult(chooser, SET_WALLPAPER);
         } else {
-            Utils.showToast(getApplicationContext(), R.string.no_wallpaper_setter_found);
+            Utils.Companion.showToast(getApplicationContext(), R.string.no_wallpaper_setter_found);
         }
     }
 
     private void openWith() {
         final Intent intent = new Intent(Intent.ACTION_VIEW);
-        intent.setDataAndType(Uri.fromFile(getCurrentFile()), Utils.getMimeType(getCurrentMedium()));
+        intent.setDataAndType(Uri.fromFile(getCurrentFile()), Utils.Companion.getMimeType(getCurrentMedium()));
         final Intent chooser = Intent.createChooser(intent, getString(R.string.open_with));
 
         if (intent.resolveActivity(getPackageManager()) != null) {
             startActivity(chooser);
         } else {
-            Utils.showToast(getApplicationContext(), R.string.no_app_found);
+            Utils.Companion.showToast(getApplicationContext(), R.string.no_app_found);
         }
     }
 
@@ -229,7 +229,7 @@ public class ViewPagerActivity extends SimpleActivity
             }
         } else if (requestCode == SET_WALLPAPER) {
             if (resultCode == RESULT_OK) {
-                Utils.showToast(getApplicationContext(), R.string.wallpaper_set_successfully);
+                Utils.Companion.showToast(getApplicationContext(), R.string.wallpaper_set_successfully);
             }
         }
         super.onActivityResult(requestCode, resultCode, data);
@@ -237,7 +237,7 @@ public class ViewPagerActivity extends SimpleActivity
 
     private void shareMedium() {
         final Medium medium = getCurrentMedium();
-        Utils.shareMedium(medium, this);
+        Utils.Companion.shareMedium(medium, this);
     }
 
     private void notifyDeletion() {
@@ -246,7 +246,7 @@ public class ViewPagerActivity extends SimpleActivity
         if (mMedia.size() <= 1) {
             deleteFile();
         } else {
-            Utils.showToast(this, R.string.file_deleted);
+            Utils.Companion.showToast(this, R.string.file_deleted);
             mUndoBtn.setVisibility(View.VISIBLE);
             mIsUndoShown = true;
             reloadViewPager();
@@ -320,7 +320,7 @@ public class ViewPagerActivity extends SimpleActivity
                 final String extension = extensionET.getText().toString().trim();
 
                 if (fileName.isEmpty() || extension.isEmpty()) {
-                    Utils.showToast(getApplicationContext(), R.string.rename_file_empty);
+                    Utils.Companion.showToast(getApplicationContext(), R.string.rename_file_empty);
                     return;
                 }
 
@@ -335,7 +335,7 @@ public class ViewPagerActivity extends SimpleActivity
                     updateActionbarTitle();
                     alertDialog.dismiss();
                 } else {
-                    Utils.showToast(getApplicationContext(), R.string.rename_file_error);
+                    Utils.Companion.showToast(getApplicationContext(), R.string.rename_file_error);
                 }
             }
         });
@@ -425,15 +425,15 @@ public class ViewPagerActivity extends SimpleActivity
     }
 
     private void hideSystemUI() {
-        Utils.hideSystemUI(mActionbar, getWindow());
+        Utils.Companion.hideSystemUI(mActionbar, getWindow());
     }
 
     private void showSystemUI() {
-        Utils.showSystemUI(mActionbar, getWindow());
+        Utils.Companion.showSystemUI(mActionbar, getWindow());
     }
 
     private void updateActionbarTitle() {
-        setTitle(Utils.getFilename(mMedia.get(mPager.getCurrentItem()).getPath()));
+        setTitle(Utils.Companion.getFilename(mMedia.get(mPager.getCurrentItem()).getPath()));
     }
 
     private Medium getCurrentMedium() {
@@ -449,11 +449,11 @@ public class ViewPagerActivity extends SimpleActivity
     private void addUndoMargin() {
         final Resources res = getResources();
         final RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) mUndoBtn.getLayoutParams();
-        final int topMargin = Utils.getStatusBarHeight(res) + Utils.getActionBarHeight(getApplicationContext(), res);
+        final int topMargin = Utils.Companion.getStatusBarHeight(res) + Utils.Companion.getActionBarHeight(getApplicationContext(), res);
         int rightMargin = params.rightMargin;
 
         if (getResources().getConfiguration().orientation != Configuration.ORIENTATION_PORTRAIT) {
-            rightMargin += Utils.getNavBarHeight(res);
+            rightMargin += Utils.Companion.getNavBarHeight(res);
         }
 
         params.setMargins(params.leftMargin, topMargin, rightMargin, params.bottomMargin);
diff --git a/app/src/main/java/com/simplemobiletools/gallery/fragments/PhotoFragment.java b/app/src/main/java/com/simplemobiletools/gallery/fragments/PhotoFragment.java
index b05f8b537..45124346a 100644
--- a/app/src/main/java/com/simplemobiletools/gallery/fragments/PhotoFragment.java
+++ b/app/src/main/java/com/simplemobiletools/gallery/fragments/PhotoFragment.java
@@ -26,7 +26,7 @@ public class PhotoFragment extends ViewPagerFragment implements View.OnClickList
 
         mMedium = (Medium) getArguments().getSerializable(Constants.MEDIUM);
         if (mMedium.getPath().startsWith("content://"))
-            mMedium.setPath(Utils.getRealPathFromURI(getContext(), Uri.parse(mMedium.getPath())));
+            mMedium.setPath(Utils.Companion.getRealPathFromURI(getContext(), Uri.parse(mMedium.getPath())));
 
         if (mMedium == null)
             return view;
diff --git a/app/src/main/java/com/simplemobiletools/gallery/fragments/VideoFragment.java b/app/src/main/java/com/simplemobiletools/gallery/fragments/VideoFragment.java
index 43f27becc..7f729f0ea 100644
--- a/app/src/main/java/com/simplemobiletools/gallery/fragments/VideoFragment.java
+++ b/app/src/main/java/com/simplemobiletools/gallery/fragments/VideoFragment.java
@@ -121,13 +121,13 @@ public class VideoFragment extends ViewPagerFragment
     private void initTimeHolder() {
         mTimeHolder = mView.findViewById(R.id.video_time_holder);
         final Resources res = getResources();
-        final int height = Utils.getNavBarHeight(res);
+        final int height = Utils.Companion.getNavBarHeight(res);
         final int left = mTimeHolder.getPaddingLeft();
         final int top = mTimeHolder.getPaddingTop();
         int right = (int) getResources().getDimension(R.dimen.timer_padding);
         int bottom = 0;
 
-        if (Utils.hasNavBar(getActivity())) {
+        if (Utils.Companion.hasNavBar(getActivity())) {
             if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
                 bottom += height;
             } else {