Android Question Application error on Android 10

[Sergey_New]

There is no such error on previous versions of Android:

Spoiler: Error

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
sending message to waiting queue (activity_permissionresult)
sending message to waiting queue (activity_permissionresult)
running waiting messages (2)
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (filedialog) Create, isFirst = true **
** Activity (filedialog) Resume **
filedialog$ResumableSub_FillTableresume (java line: 920)
java.io.IOException: /storage/emulated/0/Поколения is not a folder.
    at anywheresoftware.b4a.objects.streams.File.ListFiles(File.java:163)
    at sv.bystrovzorov.filedialog$ResumableSub_FillTable.resume(filedialog.java:920)
    at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:267)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:207)
    at anywheresoftware.b4a.BA$2.run(BA.java:387)
    at android.os.Handler.handleCallback(Handler.java:883)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:214)
    at android.app.ActivityThread.main(ActivityThread.java:7356)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
--------- beginning of crash

Spoiler: Manifest

AddManifestText(
<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="29"/>
<supports-screens android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
SetApplicationAttribute(android:theme, "@android:style/Theme.Holo.Light")
SetActivityAttribute(DataTask, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataNote, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataSubmitter, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataSource, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataRepository, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataPerson, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataName, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataMedia, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataPlace, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataCitation, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(DataEvent, android:windowSoftInputMode, adjustResize|stateHidden)
SetActivityAttribute(ListEvents, android:excludeFromRecents, true)
AddActivityText(Main,
  <intent-filter>
  <action android:name="android.intent.action.MAIN"/>
  <category android:name="android.intent.category.DEFAULT"/>
  </intent-filter>
)
AddManifestText(<permission
    android:name="$PACKAGE$.permission.MAPS_RECEIVE"
    android:protectionLevel="signature"/>
    <uses-feature android:glEsVersion="0x00020000" android:required="true"/>)
AddApplicationText(
    <meta-data     android:name="com.google.android.maps.v2.API_KEY" android:value="AIzaSyCr0Md-DCcbjYwghO8RXPZyK2aJLfHx_nQ"/>
    <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version"/>
    )
AddPermission(android.permission.ACCESS_NETWORK_STATE)
AddManifestText(<uses-permission
    android:name="android.permission.WRITE_EXTERNAL_STORAGE"
    android:maxSdkVersion="18" />
)

AddApplicationText(
  <provider
  android:name="android.support.v4.content.FileProvider"
  android:authorities="$PACKAGE$.provider"
  android:exported="false"
  android:grantUriPermissions="true">
  <meta-data
  android:name="android.support.FILE_PROVIDER_PATHS"
  android:resource="@xml/provider_paths"/>
  </provider>
)

CreateResource(xml, provider_paths,
   <files-path name="name" path="shared" />
)

What needs to be fixed?

 

[Sagenut]

Try adding this to the Manifest:

SetApplicationAttribute(android:requestLegacyExternalStorage, true)

Take a look here for explanation:
https://www.b4x.com/android/forum/threads/android-jar-targetsdkversion-minsdkversion.87610/#content
This workaround will stop working next year (around November) when Target 30 will be required.
Hoping that this will solve your actual problem.

 

[Sergey_New]

Sagenut,
Thank you very much!
This seems to fix the problem.
It is difficult to check when there is no device with Android 10 and my laptop does not have enough memory for the desired emulator