b4j

Hello, the truth is that I have been working on a project in the Java Basic language (VBNET) for several years, about 15 years. Is it possible to convert it directly to work on several Linux and Mac systems through certain tools? Do the Windows dll libraries work without problems or do many...

Hello, this is an example showcasing the latest features of the jdashboard UI library. I hope you like it. To make it work, you'll need the latest version of the jdashboard library. User: admin Pass: 1234 Download the compiled example here

AI image and video generation is getting more popular. Most of the ai image generation sites are paid, some with free plans. I tried my luck with one of them. First I signed-up them I got my API key, finally I summoned the powers of B4X to generate an ai image. The first idea that came to my...

Dim cmd1 As DBCommand = CreateCommand("select_insertnianduyusuan", params) 错误: 不兼容的类型: List<Object>无法转换为Object[] Private Sub ShowDialog(Item As Map, RowId As Long) Wait For (PrefDialog.ShowDialog(Item, "yes", "cancel")) Complete (Result As Int) If Result =...

Hello Friends! I'm starting a new project on B4J, that will run on Windows and Linux desktops. The app needs to use a 3rd party external library (.DLL and .SO). What is the best way for writing this app? Create a wrapper of DLL and .SO and use it depending on target OS? There is any tutorial...

This application showcases the use of B4X views and the multi platform programming with the #If B4A and #If B4J directives. This is how it looks like (first on my laptop then on my smartphone): A short description is available in the attachment: color_selector.pdf You can find the source codes...

Is there such a view in B4J that allows the user to manually re-order the cells in the list? I am looking for something rather like xCustomListView that responds to drag events?

I have a mobile app that is used for configuring our company's wireless sensors over a BLE connection. The source code has been through many revisions since the early days of B4A and needs updating to B4X as a step towards an iOS release for the Apple Store. The app contains a large number of...

Working on a modbus RTU project on which i send a predefined command of few bytes and in response also few bytes are send by the MODBUS RTU (REMOTE TERMINAL UNIT).Reponse length of bytes is not uniform for each command. sometime it length is 8 bytes..sometime 13 .While receiving AStream_NewData...

Hello! I need a way to run the jRDC2 before the user run my application. I've built the jRDC as a standalone package but I take the following errors when I run my application! I use jdk-14.0.1 and trying with 11.0.1 I have the same results. Running in release mode from the IDE, all are working...

Dear community, here is a snip about NEW rendering of any node in any size you want. Yery useful: the original Node is not altered. Works with B4J, not tested with B4A. Enjoy Private Sub RenderNode (factorX As Double, factorY as Double, sourceView As B4XView) As B4XBitmap Dim...

Sub Class_Globals Private Root As B4XView 'ignore Private xui As XUI 'ignore Private b4xtable1 As B4XTable Private GraphColumn As B4XTableColumn Private progress As ProgressBar End Sub public Sub zhichuchaxun GraphColumn = b4xtable1.AddColumn("总进度"...

Dim req1 As DBRequestManager = CreateRequest Dim cmd1 As DBCommand = CreateCommand("select_tubiao3",Null) Wait For (req1.ExecuteQuery(cmd1, 0, Null)) JobDone(j1 As HttpJob) If j1.Success Then req1.HandleJobAsync(j1, "req1") Wait For (req1) req1_Result(res1 As DBResult)...

Wait For (req.ExecuteQuery(cmd, 0, Null)) JobDone(j As HttpJob) If j.Success Then req.HandleJobAsync(j, "req") Wait For (req) req_Result(res As DBResult) req.PrintTable(res) 'PIE CHART PieChart.Initialize("PC") PieChart.Title = "Pie Chart"...

[CODE lang="b4x" title="java.lang.NumberFormatException: For input string: "null"" highlight="java.lang.NumberFormatException: For input string: "null""]Call B4XPages.GetManager.LogEvents = True to enable logging B4XPages events. Tag: null, Columns: 3, Rows: 1 BUMEN FEIYONGGUIJI jine...

B4XTable1.AddColumn(Main.b & "月份计划", B4XTable1.COLUMN_TYPE_TEXT) { "title": "12月份计划", "type": "Text", "key": "12月份计划", "required": true },

Hello! I would like to ask @Alexander Stolte if there is any event triggered when we change the month from header. I need to do some tasks when the month is changed.

Hello forum members, we use this function for setting the alignment of columns of a TableView in our B4J applications: 'Possible Alignments: [ top-left | top-center | top-right | center-left | center | center-right | bottom-left | bottom-center | bottom-right | baseline-left | baseline-center |...

Hey guys! I'm facing a quite weird problem with a B4J app. Looks like it happens when I use FileChooser.ShowOpenMultiple(MainForm). Whenever I hit "Cancel" on the file chooser dialog, application crashes immediately. In debug mode, B4J IDE stays running as if the app was still open even though...

I'm testing @DonManfred 's SMB client (https://www.b4x.com/android/forum/threads/jcifs-ng-smb-client-smb2.104561/), both the B4A and B4J versions. B4A works fine, and so does B4J on Linux. On Windows 10 and 11 however, I'm getting the below error and have no clue what to do; the library used is...