Android Question TargetSdkVersion from 19 to 26 some commands don't work

[Urishev]

When moving targetSdkVersion from 19 to 26, the following code stopped working:
Sub ListFiles
Dim list_files As List
list_files.Initialize
File.MakeDir(File.DirRootExternal, "Text/")
dir=File.Combine(File.DirRootExternal,"Text/")
list_files=File.ListFiles(dir)
For i= list_files.Size -1 To 0 Step -1 ' error "(List) Not initialized"
If i = list_files.Size-Selected-1 Then
Filename = "ECG_Reader/" & list_files.Get(list_files.Size-Selected-1)
ListView1.AddTwoLines(list_files.Get(list_files.Size-Selected-1),"")
End if
End Sub

How to fix?

 

[DonManfred]

Please use CODE Tags when posting Code!

It works like expected. I don´t see any bug here.
Make sure to use runtimepermissions to request the permission.

Check this Tutorial
https://www.b4x.com/android/forum/threads/android-jar-targetsdkversion-minsdkversion.87610/

If it does not work for you then
- Post the FULL Error you got
- Post a small project which shows the issue.

Hard to help otherwise.

 

[Urishev]

In targetSdkVersion 26, this code does not work. What need to do?

Sub ListFiles
  Dim list_files As List
    list_files.Initialize   
    File.MakeDir(File.DirRootExternal, "ECG_Reader/")
    dir=File.Combine(File.DirRootExternal,"ECG_Reader/")
    list_files=File.ListFiles(dir)
    For i= list_files.Size -1 To 0 Step -1 ' error "(List) Not initialized"
       If i = list_files.Size-Selected-1 Then       
         Filename = "ECG_Reader/" & list_files.Get(list_files.Size-Selected-1)
         ListView1.AddTwoLines(list_files.Get(list_files.Size-Selected-1),"")
      End if
End Sub

 

[mw71]

have you check the (Runtime) permission to read from memory? (see Post #2)

 

[Urishev]

How to use (Runtime) permission? Put on the manifest?
Something hard. It used to be all easy.

 

[Erel]

Runtime Permissions (Android 6.0+ Permissions)

 

[Urishev]

Thank you, figured out!