Android 11 open folder crash

[xuechen628]

E/MessageQueue-JNI: java.lang.NullPointerException: Attempt to get length of null array
at me.rosuh.filepicker.utils.FileUtils$Companion.produceListDataSource(FileUtils.kt:74) <--------- (should check first if rootFile is null, maybe return an empty list)
at me.rosuh.filepicker.FilePickerActivity.enterDirAndUpdateUI(FilePickerActivity.kt:460)
at me.rosuh.filepicker.FilePickerActivity.onItemClick(FilePickerActivity.kt:366)
at me.rosuh.filepicker.adapter.RecyclerViewListener$ItemTouchHelperGestureListener.onSingleTapUp(RecyclerViewListener.kt:92)
at android.view.GestureDetector.onTouchEvent(GestureDetector.java:758)
at androidx.core.view.GestureDetectorCompat$GestureDetectorCompatImplJellybeanMr2.onTouchEvent(GestureDetectorCompat.java:480)
at androidx.core.view.GestureDetectorCompat.onTouchEvent(GestureDetectorCompat.java:543)
at me.rosuh.filepicker.adapter.RecyclerViewListener.onInterceptTouchEvent(RecyclerViewListener.kt:68)
at androidx.recyclerview.widget.RecyclerView.findInterceptingOnItemTouchListener(RecyclerView.java:3151)
at androidx.recyclerview.widget.RecyclerView.onInterceptTouchEvent(RecyclerView.java:3170)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2664)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3118)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2799)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:488)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1871)
at android.app.Activity.dispatchTouchEvent(Activity.java:4125)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:446)
at android.view.View.dispatchPointerEvent(View.java:14568)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:6016)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5819)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5310)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5367)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5333)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5485)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5341)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5542)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5314)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5367)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5333)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5341)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5314)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8080)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8031)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7992)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8203)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:220)

[rosuH]

@xuechen628 Check out whether if your targetAPI equals or larger than 30. Do not support scope storage for now.

[xuechen628]

Hi @rosuH, thank you for your quick response, and my targetAPI = 29
folders such as document, download, etc. work fine at android 11, only some folder will throw NullPointerException at produceListDataSource(FileUtils.kt:74), I think if you can add null check will be all fine ; )

[rosuH]

That's wired... According to java.io.File#listFiles() 's docs:

An array of abstract pathnames denoting the files and
* directories in the directory denoted by this abstract pathname.
* The array will be empty if the directory is empty. Returns
* {@code null} if this abstract pathname does not denote a
* directory, or if an I/O error occurs.

If the folder is empty, listFiles should return an empty array. Should not return null unless the folder is not an real folder?

Can you confirm that? Maybe crate File instance for that folder and make sure File.isDir() returns true?.

Anyway, this is a bug and I will fix ASAP, thanks for your feedback~

[xuechen628]

that's true, but only listFiles() will return null if the path does not exist / not folder / something wrong ; )

public File[] listFiles()
If this abstract pathname does not denote a directory, then this method returns null.

thanks for your time and this awesome project!!!

[rosuH]

Try the latest dev version if you are available. If that works I would release one ;)

dependencies {
	        implementation 'com.github.rosuH:AndroidFilePicker:dev-SNAPSHOT'
	}

[xuechen628]

Could not find com.github.rosuH:AndroidFilePicker:dev-SNAPSHOT.

[rosuH]

@xuechen628 Hold on. I would check that later.

[rosuH]

@xuechen628 Try this: implementation 'com.github.rosuH:AndroidFilePicker:70d547a92c'

[xuechen628]

worked perfect, you can release now! thanks a lot! 👍