fix(crash): show snack bar in nested scroll view

[alperozturk96]

Issue

Calling showSnackBar function with view from NestedScrollView causing crash e.g. FileDetailSharingFragment.java‎

Exception java.lang.IllegalStateException: ScrollView can host only one direct child
 at androidx.core.widget.NestedScrollView.addView ([NestedScrollView.java:540](http://nestedscrollview.java:540/))
 at [com.google.android](http://com.google.android/).material.snackbar.BaseTransientBottomBar$SnackbarBaseLayout.addToTargetParent ([BaseTransientBottomBar.java:1313](http://basetransientbottombar.java:1313/))
 at [com.google.android](http://com.google.android/).material.snackbar.BaseTransientBottomBar.showView ([BaseTransientBottomBar.java:775](http://basetransientbottombar.java:775/))
 at [com.google.android](http://com.google.android/).material.snackbar.BaseTransientBottomBar$1.handleMessage ([BaseTransientBottomBar.java:254](http://basetransientbottombar.java:254/))
 at android.os.Handler.dispatchMessage ([Handler.java:106](http://handler.java:106/))
 at android.os.Looper.loopOnce ([Looper.java:273](http://looper.java:273/))
 at android.os.Looper.loop ([Looper.java:363](http://looper.java:363/))
 at [android.app](http://android.app/).ActivityThread.main ([ActivityThread.java:10060](http://activitythread.java:10060/))
 at java.lang.reflect.Method.invoke
 at [com.android](http://com.android/).internal.os.RuntimeInit$MethodAndArgsCaller.run ([RuntimeInit.java:632](http://runtimeinit.java:632/))
 at [com.android](http://com.android/).internal.os.ZygoteInit.main ([ZygoteInit.java:975](http://zygoteinit.java:975/))

Changes

Simplifies DisplayUtils functions
Calls fragment instead of view so that snack bar can be shown from activity
Shows snackbar always in main thread
Adds null check before trying to show snackbar
Adds tests

Test

Screen.Recording.2026-02-26.at.12.23.48.mov

[alperozturk96]

/backport to stable-3.36

[github-actions]

blue-Light-Screenshot test failed, but no output was generated. Maybe a preliminary stage failed.

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	42	42
Correctness	75	75
Dodgy code	253	252
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	34	34
Performance	43	43
Security	18	18
Total	475	474

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/16597.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.