help on check box and other buttons

[Rioven]

Hello everyone,
B4A newbie need help.
Could anyone please direct me to a nice sample on how to handle and storing check box values to a file to initialize my applications.

I've also noticed that when the device is rotated to landscape or portrait all my check boxes turned unchecked. thanks.

 

[klaus]

There are two possibilities:
- if you just need to store the setup parameters just during the running of the program:
store the setup variables in a Map or a List declared in Sub Process_Global
set the Checkboxes in Activity_Create
save the setup variables in the Map or List either directly when they are changed or in Sub Activity_Pause
- if you need to remember the setup also after leaving the program:
like above, but saving the Map or List to a File in Sub Activity_Pause and reading the file in Activity_Create when FirstTime = True.

When the Device is rotated the current activity is Paused and can even be destroyed by the OS and the Activity is again generated with Activity_Create and Activity_Resume.

Best regards.

 

[Rioven]

hopefully I got it!

Hi Klaus!

Thanks for This! You're great! I will try it later.
To recap(...if I did understand well...pls. correct me if I'm wrong or some other tips).

1) Under Sub Process_Global Declare Variables, Map, or Lists which are also be used for device rotation subs-pause/resume.

2) Under Sub Activity_Create
If the ini.file exist=False then...
RUN the checkbox values programmatically just for the FIRST TIME and save to create ini.file.
ELSE retrieve ini.file
.
.
Then reflect to checkboxes display status.
.
.

3)Under Sub Activity_Pause It requires codes to store the checboxes values.

4) Under Sub Activity_Resume and values stored be retrieved at
(Just now I know the purpose of these subs...hmmm...FOR DEVICE ROTATIONS)am catching up reading threads and I'm still on page50:sign0148:

5) Save to ini.file whenever...

The above as well to be applied on other buttons/TextReader etc.properties, contents or states not to be destroyed during device rotations.

 

[klaus]

1) Yes
2) Yes
3) Yes
4) If you have retreaved the values in Activity_Create you don't need to do it in Activity_Resume.
5) you can save the file when you quit the program if you have saved the parameters in a Map or List otherwise you must save it at latest in Activity_Paused.

Best regards.

 

[agraham]

4) If you have retreaved the values in Activity_Create you don't need to do it in Activity_Resume.

Not so I'm afraid Klaus. Activity_Resume is the best place to restore stuff. You can get an Activity_Pause followed by an Activity_Resume without going through an Activity_Create, for example if the user presses the Home key and then restarts your app.

 

[klaus]

Thank's Andrew,
I'm still learning too.

Best regards.

 

[Rioven]

Thank you!

Thanks Klaus and Andrew!
This is a good start for me on how to basically structure my applications as I go on with my B4A codings.
In addition...
I would like to make modules that could be used easily be applied or modified for my other future projects.
Then I must declare module Variables to Sub Process_Globals at Main module only, is that correct?

thanks again!

With best regards,

 

[agraham]

Then I must declare module Variables to Sub Process_Globals at Main module only, is that correct?

No. Variables declared in an Activity, Code or Service Module Sub Process_Globals are global to the application and can be accessed from other Activity, Code and Service Modules.