Android Question save program settings

[Mostez]

I want to save program settings(changed by user, then read at program start), i.e baud rate, preferred communication method, calibration factors..etc. what is the best method to do that? An example is highly appreciated.

thanks

 

[Erel]

KeyValueStore is the best option: https://www.b4x.com/android/forum/threads/b4x-kvs2-keyvaluestore2-library.120234/

Note that it is an internal library in B4A v10.2.

 

[mcqueccu]

You can save it in text file or use keyvaluestore2

    'To save your data
    Dim m As Map
    m.Initialize
    m.Put("baud_rate", your_baud_rate)
    m.Put("pref_communication", your_pref_comm)
    m.Put("calibration",your_calibration)   
    File.WriteMap(File.DirInternal,"settings.dat",m)
    
    'TO READ THE VALUES TOO   
    Dim myData As Map = File.ReadMap(File.DirInternal,"settings.dat")

 

[JohnC]

I don't think he can use keystore because the user wont be able to modify the settings outside of the app because the keystore file is internal, right?

And if the setttings file is to be externally accessible/modifyable, wouldn't there be a problem of the app not being able to read/write to that file due to all the lockdowns that API 29 has on external files/memory?

But if you meant that the user would make the changes to settings from *within* the app, then disregard the above because I initially interpreted the OP as if the user would modify the settings file external to the app, then the app would read in the new settings

 

[Erel]

I don't think he can use keystore because the user wont be able to modify the settings outside of the app because the keystore file is internal, right?

I don't think that the user is expected to change the settings file directly.

(Note that B4XPreferenceDialog is a good tool for settings layouts.)

 

[Mostez]

I don't think that the user is expected to change the settings file directly.

yes Erel, there will be user activity to change settings from

 

[mcqueccu]

yes Erel, there will be user activity to change settings from

But the settings files, that will be saved will NOT be changed DIRECTLY by the user, outside of the application. That is what Erel meant