Android Tutorial StateManager - Helps managing Android applications settings and state

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jkurant

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But I have RandomAccessFile.jar and RandomAccessFile.xml in my C:\Program Files (x86)\Anywhere Software\Basic4android\Libraries folder. I don't understand why it is not working. Could someone look at my project files? I just attached the zip file.
 

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jkurant

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Also, I have confirmed that C:\Program Files (x86)\Anywhere Software\Basic4android\Libraries is the proper location because it is shown on the Configure Paths screen as the folder for Additional Libraries. RandomAccessFile is still showing in bright red.
 

klaus

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I suppose that you haven't checked the RandomAccessFile library in the IDE Lib Tab in the lower right corner.
I loaded your program and saw that the library was not checked.

Best regards.
 

jkurant

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Ahh, yes, thank you. I keep forgetting about those tabs in the lower right corner.

However, during the time I couldn't get the RandomAccessFile to work, I went back to using PreferencesActivity. I am not even using the UI part of it, but am just reading and writing the preferences using preferences.GetString and preferences.SetString.

Unless someone can tell me this is a bad idea, I think I will just keep using PreferencesActivity.
 

dbcrosby

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I have an app that I clear the display and then display the Progress Dialog while I'm loading files from the server.
My problem is, if the android device is rotated during the time the Progress Dialog is showing, I loose the progress dialog and the screen repaints with the old information even thou I cleared it. I need to keep the screen cleared and the progress dialog displayed until it's done loading the files. I am using the State Manger to handle device rotation.
Thanks!
 

Penko

Active Member
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Erel, just wanted to thank you for this module.

I've included two methods in a code file and am posting the code in case someone finds it useful:

In my case the Code Module is called "Common".

CodeModule Sub actRestoreState - called in Activity_Create
B4X:
   Sub actRestoreState(Activity As Activity, activityname As String, validperiodinminutes As Int)

   If StateManager.RestoreState(Activity, activityname, validperiodinminutes) = False Then
   
      ' you can select case here based on activity and set default values
      
    End If

End Sub
   
' CodeModule Sub actSaveResetState - called in Activity_Paused
   Sub actSaveResetState(Activity As Activity, activityname, UserClosed As Boolean)
       
   If UserClosed Then
           StateManager.ResetState(activityname)
       Else
           StateManager.SaveState(Activity, activityname)
       End If
      
          StateManager.SaveSettings
   End Sub
It's only two function calls that we have to add in order to get it working. I am posting my original subs in order to see how these calls combine with other code. Also note that you should have loaded the layout file before trying to restore the values.

B4X:
Sub Activity_Pause (UserClosed As Boolean)
   If(AppSettings.debug_mode) Then
      Common.LogT("Activity_Pause()", "ACTIVITY_EVENT")
   End If
   
   Common.actSaveResetState(Activity, "AddEditFile", UserClosed)
End Sub
B4X:
Sub Activity_Create(FirstTime As Boolean)

   Activity.LoadLayout("layAddEditFile_def")
      
   If(AppSettings.debug_mode) Then
      Common.LogT("Activity_Create()  FirstTime = " & FirstTime, "ACTIVITY_EVENT")
   End If
   
   
   setEverything
   
   Common.actRestoreState(Activity, "AddEditFile", 0)
   
End Sub
 

RBeaubien

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Erel,

I am getting an error on line 14:

If Settings.IsInitialized = False Then

I/It can't find the definition of .IsInitialized

Where should that be declared? Am I missing something?

(Using B4A 1.90, RandomAccessfile 1.30, Reflection 1.90)

Thanx,

Rob
 

RBeaubien

Member
Licensed User
It is:

Dim Settings As Map

Just doesn't seem to have .IsInitialized as a property or method OR I have some incorrect lib referenced or missing. Where is Map declared?
 

Kevin

Well-Known Member
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I didn't go back and read this thread or search the forum, but I think I recall seeing a post by Erel that we should check to see if the state was restored in Activity_Create.

Originally the example showed it being done in Activity_Restore and it was later said that it was wrong and was then revised.

My app is pretty complicated as far as restoring or not restoring the state. Because I got all of this coded and working before the correction was made to check it in Activity_Create, all of my code does this in Restore instead.

Everything seems to work fine but I was wondering what issues this can cause if I leave it all in the Restore?
 
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