properly update the neighbour time holder visibility too

app/src/main/java/com/simplemobiletools/gallery/activities/ViewPagerActivity.java

@@ -281,7 +281,7 @@ public class ViewPagerActivity extends AppCompatActivity
         return myMedia;
     }
 
-    public boolean fragmentClicked() {
+    public void fragmentClicked() {
         deleteFile();
         isFullScreen = !isFullScreen;
         if (isFullScreen) {
@@ -289,7 +289,6 @@ public class ViewPagerActivity extends AppCompatActivity
         } else {
             showSystemUI();
         }
-        return isFullScreen;
     }
 
     private void hideSystemUI() {
@@ -361,6 +360,9 @@ public class ViewPagerActivity extends AppCompatActivity
         if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
             isFullScreen = false;
         }
+
+        final MyPagerAdapter adapter = (MyPagerAdapter) pager.getAdapter();
+        adapter.updateUiVisibility(isFullScreen, pos);
     }
 
     @Override

app/src/main/java/com/simplemobiletools/gallery/adapters/MyPagerAdapter.java

@@ -54,6 +54,15 @@ public class MyPagerAdapter extends FragmentStatePagerAdapter {
         }
     }
 
+    public void updateUiVisibility(boolean isFullscreen, int pos) {
+        for (int i = -1; i <= 1; i++) {
+            ViewPagerFragment fragment = fragments.get(pos + i);
+            if (fragment != null) {
+                fragment.systemUiVisibilityChanged(isFullscreen);
+            }
+        }
+    }
+
     public void updateItems(List<Medium> newPaths) {
         media.clear();
         media.addAll(newPaths);

app/src/main/java/com/simplemobiletools/gallery/fragments/PhotoFragment.java

@@ -45,4 +45,9 @@ public class PhotoFragment extends ViewPagerFragment implements View.OnClickList
     public void itemDragged() {
 
     }
+
+    @Override
+    public void systemUiVisibilityChanged(boolean toFullscreen) {
+
+    }
 }

app/src/main/java/com/simplemobiletools/gallery/fragments/VideoFragment.java

@@ -86,6 +86,14 @@ public class VideoFragment extends ViewPagerFragment
         pauseVideo();
     }
 
+    @Override
+    public void systemUiVisibilityChanged(boolean toFullscreen) {
+        if (isFullscreen != toFullscreen) {
+            isFullscreen = toFullscreen;
+            checkFullscreen();
+        }
+    }
+
     private void initTimeHolder(View view) {
         timeHolder = view.findViewById(R.id.video_time_holder);
         final Resources res = getResources();
@@ -146,16 +154,20 @@ public class VideoFragment extends ViewPagerFragment
                 togglePlayPause();
                 break;
             default:
-                toggleFullscreen();
+                isFullscreen = !isFullscreen;
+                checkFullscreen();
+                ((ViewPagerActivity) getActivity()).fragmentClicked();
                 break;
         }
     }
 
-    private void toggleFullscreen() {
-        isFullscreen = ((ViewPagerActivity) getActivity()).fragmentClicked();
+    private void checkFullscreen() {
         int anim = R.anim.fade_in;
         if (isFullscreen) {
             anim = R.anim.fade_out;
+            seekBar.setOnSeekBarChangeListener(null);
+        } else {
+            seekBar.setOnSeekBarChangeListener(this);
         }
 
         final Animation animation = AnimationUtils.loadAnimation(getContext(), anim);

app/src/main/java/com/simplemobiletools/gallery/fragments/ViewPagerFragment.java

@@ -4,4 +4,6 @@ import android.support.v4.app.Fragment;
 
 public abstract class ViewPagerFragment extends Fragment {
     public abstract void itemDragged();
+
+    public abstract void systemUiVisibilityChanged(boolean toFullscreen);
 }