B4J Tutorials

[example] B4X Time Tracker

Time tracker example with a server component and iOS and Android client apps.
The client apps allow the employees to check in and out (based on the current status).
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Attachments

  • TimeTracker-B4A.zip
    11.8 KB · Views: 615
  • TimeTracker-B4i.zip
    9.2 KB · Views: 471
  • TimeTracker-B4J.zip
    7.1 KB · Views: 688
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jServer & SQLite [Multiple Request Stress Test]

Should I use SQLite as my web server database?

This has come up before and last week it came up again in the "Chit Chat" forum. The question has already been answered here before and there...
 

Attachments

  • StressSQLite.zip
    5.9 KB · Views: 460
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(B4X) Creating LAMP server with b4x on Amazon EC2

LAMP: Linux Apache MySQL PHP

In this tutorial I will explain how to bring complete working server, on Amazon EC2 (you get 1 year free)

I am using this server for sending notification for iphone...
 

B4XTable + jPoi + Excel Workbook

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It is very simple to read data from an Excel workbook and show it with B4XTable.

The almost complete code:
B4X:
...
 

Attachments

  • B4XTableWithExcel.zip
    29.3 KB · Views: 1,028
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Styling buttons with CSS

[ABMaterial] Custom component ABMTableGrid (team project)

One of the most asked for components in ABMaterial is an editable Grid. We already have ABMTable and ABMTableMutable, but they have their limitations when it comes to being editable. So, as this...
 

Attachments

  • ABMTableGridDemo.zip
    16.1 KB · Views: 705
  • CSSJS.zip
    31 KB · Views: 694
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[BANano] v2: (1) B4J Abstract Designer

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[B4X] External Editors

Short one.

You can configure the IDE to show a list of external file editors. The list shows when you right click on a file in the Files tab...
 
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[BANano] MySQL CRUD with PHP - Part 1

Attachments

  • BANanoMySQL.zip
    3.7 KB · Views: 627
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Google Play Developer API

Google Play Developer API allows you to access your developer account and do all kinds of things. For example get the latest app reviews or check the status of in-app purchases.

Like with all...
 

Attachments

  • GooglePlayDeveloperServer.zip
    4.3 KB · Views: 638
  • GooglePlayDeveloperUI.zip
    3.7 KB · Views: 663

GuessMyNumber - Very simple example

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The computer chooses a number and you need to find the correct number.
B4X:
Sub Process_Globals
   Private fx As JFX...
 

Attachments

  • GuessMyNumber.zip
    1.3 KB · Views: 893

[WebApp] Minimum Spanning Tree

[Server] Custom error pages

Starting from B4J v1.80 you can configure custom error pages. This means that instead of the default error page:

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You can...
 

Raspberry Pi 2 - Server Performance

I ran some tests to check whether the Raspberry Pi 2 can be suitable for server solutions.

The tests were similar to the tests previously done on a PC...
 

Unhandled exceptions

Unhandled exceptions are exceptions that were thrown outside of Try / Catch blocks. Such exceptions cause the process to exit in all cases except of server applications.

Starting from B4J v5.0 it...
 

[ABMaterial] IMPORTANT change for B4J 5.80

As in B4J 5.80 Jetty has been updated to 9.4.6 (which contains an important change in the internal Session framework), you will need to update some code in StartServer() and StartServerHTTP2() in...
 

Magnifying glass example

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A Canvas node is used to magnify a small window under the mouse cursor.

The main code is:
B4X:
Sub iv_MouseMoved...
 

Attachments

  • MagnifyingGlass.zip
    99.5 KB · Views: 867
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[Pen&Paper] Create & Run a simple 'Hello ABMaterial' WebApp

Hi there

I have been requested to do a simple something on how one can create a simple ABMaterial WebApp using the Pen&Paper code generator. The attached video seeks to demonstrate with a simple...
 

Modules Attributes

The following module attributes are supported:

Main Module
  • MainFormWidth / MainFormHeight - Set the main form initial width and height.
  • AdditionalJar - An...
 
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Synchronize ListView Scrolling

Attachments

  • LVSyncClass.zip
    2.8 KB · Views: 534
  • LVSync-2.zip
    3.1 KB · Views: 500
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