Tutorials & Examples

xCustomListView v1.50 adds an important new event named VisibleRangeChanged. This event is fired whenever the visible range of items changes.

We can use this event to defer the items creation...

 

Start with this tutorial if you are not familiar with custom views: [B4X] Custom Views with Enhanced Designer Support

With the help of XUI it is quite simple to create custom views classes...

 

Question: How can I build a layout with X controls spread horizontally or vertically?

Answer: You can use the designer script for this. As the designer script engine (currently) doesn't support...

 

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This video takes you through the process of creating onboarding...

 

 

I would like to list here and give some tips where I get my design ideas for the apps I develope.

1. Very simple, for example i want to design a Bottom Card, then i type on google images...

 

More videos: https://www.b4x.com/etp.html

The example app is attached.
Note that the correct library that needs to be checked, except of B4XPreferencesDialog, is XUI Views...

 

The soon to be released versions of B4A, B4i and B4J include a new feature named: designer script extensions. The new feature allows calling B4X code from the visual designer scripts.
Note that...

 

1. This tutorial is about BitmapCreator v3.5+.
2. It is relevant for B4A, B4i and B4J.
3. The features discussed are only needed when making hundreds or more drawings per second.

Drawing...

 

The main challenge here is the performance. All particles are updated if needed and redrawn every cycle.

The Particles...

 

Please use XUI2D for new games: https://www.b4x.com/android/forum/threads/xui2d-example-pack.96454/

Spoiler

BitmapCreator is a relatively new cross-platform class for low level...

 

B4XPages makes many things simple and even trivial.
As Android developers, we are dealing with these challenges for many years now so it might take us a while to understand how simple things can...

 

B4A, B4i and B4J splash screen implementation. The implementation is different in each platform.

1. Don't miss the manifest editor code in B4A.
2. Don't use %y in the code. Use Root.Height...

 

Roughly speaking, Mastodon is an open source, distributed, social network a bit similar to Twitter:

Mastodon - Decentralized social media

Learn more about Mastodon, the radically different, free and open-source decentralized social media platform.

joinmastodon.org

Pleroma is a lightweight implementation of Mastodon with some...

 

Cross platform version, based on B4XPages, of...

 

This is a B4i + B4A example. It adds a dynamic badge to the menu icon. It also shows how to update menu items at runtime.

Don't miss:
1. B4A - theme settings in manifest editor.
2...

 

B4A + B4i project that uses an intent in B4A and the Camera object in B4i to take a picture using the default camera app.

The B4A code depends on JpegUtils...

 

Example of showing a Google map, in a cross platform B4XPages project. The APIs of the three GoogleMaps libraries are quite different from one another, so we need to use platform...

 

Better to use BitmapsAsync: https://www.b4x.com/android/forum/threads/b4x-bitmapsasync.119589/#content


Example of showing online images, which are downloaded from...

 

A simple, B4A + B4i, example based on:
B4A: https://www.b4x.com/android/forum/t...-messages-firebase-cloud-messaging-fcm.67716/
B4i...