Android Question PreferenceManager - how to delete key and value?

[kompiler]

Hello, how can I delete a single key and value in PreferenceManager?
I found this way

Dim PMR As Map=PreferenceManager1.GetAll
PreferenceManager1.ClearAll
For K=0 To PMR.Size-1
   Dim S As String=PMR.GetKeyAt(K)
   If S<>"Key_to_delete" Then
      PreferenceManager1.SetString(PMR.GetKeyAt(K),PMR.GetValueAt(K))
   End If
Next

but it takes a long time.

 

[LucaMs]

I'm pretty sure Erel would suggest this to you:
https://www.b4x.com/android/forum/t...alog-cross-platform-forms.103842/#post-651047

 

[Erel]

but it takes a long time.

Test it in release mode. What is the output of:

Dim n As Long = DateTime.Now
'your code here
Log(DateTime.Now - n)

 

[kompiler]

Tested several times in release mode

** Activity (main) Resume **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
1833
1480
2007
1853
2030

I have 230 entries (key / value) in PreferenceManger

 

[DonManfred]

what if you try just try to clear (set value to an empty string) the value for Key_to_delete only instead of clearing all and set them all new.

 

[Erel]

What are you using PreferencesManager for? There are probably better options available.

 

[kompiler]

I use to store variables and settings without access to mass storage

 

[Erel]

There are much better options.
The best one is KVS2.

You can always store data in File.DirInternal.