fix: npe left fragment adapter

[alperozturk96]

• Tests written, or not not needed

Fixes

E  FATAL EXCEPTION: main
Process: com.nextcloud.client, PID: 21488
java.lang.NullPointerException: Attempt to read from field 'java.util.ArrayList com.owncloud.android.ui.adapter.OCFileListAdapter.listOfHiddenFiles' on a null object reference in method 'void com.owncloud.android.ui.activity.FileDisplayActivity.resetSearchAction()'
at com.owncloud.android.ui.activity.FileDisplayActivity.resetSearchAction(FileDisplayActivity.kt:1225)
at com.owncloud.android.ui.activity.FileDisplayActivity.access$resetSearchAction(FileDisplayActivity.kt:173)
at com.owncloud.android.ui.activity.FileDisplayActivity$handleBackPress$1.handleOnBackPressed(FileDisplayActivity.kt:1165)
at androidx.activity.OnBackPressedDispatcher.onBackPressed(OnBackPressedDispatcher.kt:279)
at com.owncloud.android.ui.activity.FileDisplayActivity.onOptionsItemSelected(FileDisplayActivity.kt:940)
at android.app.Activity.onMenuItemSelected(Activity.java:4783)
at androidx.activity.ComponentActivity.onMenuItemSelected(ComponentActivity.kt:477)
at androidx.fragment.app.FragmentActivity.onMenuItemSelected(FragmentActivity.kt:264)
at androidx.appcompat.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.kt:256)
at androidx.appcompat.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:109)
at androidx.appcompat.widget.ToolbarWidgetWrapper$1.onClick(ToolbarWidgetWrapper.java:187)
at android.view.View.performClick(View.java:8209)
at android.view.View.performClickInternal(View.java:8186)
at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
at android.view.View$PerformClick.run(View.java:31889)
at android.os.Handler.handleCallback(Handler.java:1070)
at android.os.Handler.dispatchMessage(Handler.java:125)
at android.os.Looper.dispatchMessage(Looper.java:333)
at android.os.Looper.loopOnce(Looper.java:263)
at android.os.Looper.loop(Looper.java:367)
at android.app.ActivityThread.main(ActivityThread.java:9227)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:566)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:929)

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/15807.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.

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	45	42
Errors	11	11

SpotBugs

Category	Base	New
Bad practice	46	46
Correctness	73	73
Dodgy code	266	266
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	35	35
Performance	48	48
Security	18	18
Total	496	496