These B4X modules will handle the synchronization of key/value databases between multiple devices and between platforms!
So one application runs on a server widely available on the internet such as a low cost VPS that can run java applications.
Then each application have to add simple code to get synchronized variables.
ckvs.Put("User1", "Key1", 100) Log(ckvs.Get("User1", "Key1")) '100 Log(ckvs.GetDefault("User2", "Key1", 0)) '0 because User2/Key1 is different than User1/Key1
The SetAutoRefresh method sets the user(s) that will be fetched from the remote store.
For example if we want to auto-synchronize the data of “User1”:
'Code module #Region Project Attributes #ApplicationLabel: B4i Example #Version: 1.0.0 'Orientation possible values: Portrait, LandscapeLeft, LandscapeRight and PortraitUpsideDown #iPhoneOrientations: Portrait, LandscapeLeft, LandscapeRight #iPadOrientations: Portrait, LandscapeLeft, LandscapeRight, PortraitUpsideDown #Target: iPhone, iPad #MinVersion: 7 #End Region Sub Process_Globals 'These global variables will be declared once when the application starts. 'Public variables can be accessed from all modules. Public App As Application Public NavControl As NavigationController Private Page1 As Page Type Item (UserField As String, KeyField As String, ValueField() As Byte, IdField As Long, TimeField As Long) Type Task (TaskName As String, TaskItem As Item) Private ckvs As ClientKVS Private TextField1 As TextField Private User As String = "u1" End Sub Private Sub Application_Start (Nav As NavigationController) NavControl = Nav Page1.Initialize("Page1") Page1.RootPanel.LoadLayout("1") NavControl.ShowPage(Page1) ckvs.Initialize(Me, "ckvs", "http://xxx.nopapers.org:12345") ckvs.SetAutoRefresh(Array(User), 0.1) 'auto refresh every 0.1 minutes TextField1.Text = ckvs.GetDefaultAndPut(User, "number", 0) End Sub Private Sub ckvs_NewData TextField1.Text = ckvs.Get(User, "number") End Sub Sub btnSet_Click Dim number As Int = TextField1.Text ckvs.Put(User, "number", number) Page1.ResignFocus End Sub Private Sub Page1_Resize(Width As Int, Height As Int) End Sub Private Sub Application_Background End Sub