Tutorials & Examples

Android development starts here. Please do not post questions in this sub-forum.

Corso B4A crea una app col tuo sito web

Ciao a tutti, ho creato un corso in italiano su piattaforma B4A per creare una app con un sito web, il corso è per principianti e guida l'utente dal download e l'impostazione di B4A, del JDK e...
 
Click to expand...

[B4x]Data exchange (B4x, php, servers, .net and others)

After some years I have developed several apps to communicate with other apps, servers and platforms. My goal was to have ONE standard solution without additional propriatary solutions which work...
 
Click to expand...

jarsigner error: java.security.SignatureException: private key algorithm is not compatible

Private sign keys created with B4A v7.80 or less together with Java 8u151+ will fail with the above error message. Note that it does not affect existing keys.
It is related to a change in the...
 
Click to expand...

Integrating Firebase Services

Google has acquired a company named Firebase and is now offering many backend services under the Firebase umbrella. Most of them are free.

Integrating the services is relatively simple.

1. Use...
 
Last edited:
Click to expand...

GPS Status in the OsmAnd - vs - GPS Connected.

Hello.
Probably the majority of using GPS, wondered how to display the GPS Status in OsmAnd:

So,
wanting to display the GPS Status in the OsmAnd 2.9.3 application, publication date 2018-02-08
the...
 

Attachments

  • Screenshot_01.png
    45.4 KB · Views: 1,018
  • GPS Connected.apk
    423.6 KB · Views: 676
Last edited:
Click to expand...

B4A how to learn it in 1 day

Click to expand...

Watch the b4x Video Tutorials with interactive zoom

if you're having problems with the resolution, or your age ( ) and you see the code too small ,try to use this tricky feature in VLC Player called "interactive zoom"

you can see all code...
 
Last edited:
Click to expand...

Persistent log for IDE (developer) or APP (user)

I write for me, and share.
Add functionality to a log and logcolor functions.
Easy to implement.
Source Code for enhance or fix.
CSBuilder, TextWriter & TextReader implementation.


B4X: 
...
 

Attachments

  • wlog.zip
    401.1 KB · Views: 570
Click to expand...

Signing your application before uploading to Google Play

The result of compiling your application is an APK file. This is a package file that contains the compiled source code and the assets files.
The APK file must be signed before installation...
 
Click to expand...

SERVER IRC (Internet Relay Chat)

With the first steps on JAVA, my first program was an IRC SERVER. Subsequently I have evolved it and it has become the base to realize a SERVER for webchat.
I developed for a couple of...
 

Attachments

  • SD_SERVER_IRC.zip
    10.7 KB · Views: 977
Last edited:
Click to expand...

Client IRC (Internet Relay Chat)

With the IRC Client complete the work started with the IRC Server.

As already explained is a Basic version, to give only an idea of how it works, but it is not complete with all the commands, and...
 

Attachments

  • irc_chat.zip
    18 KB · Views: 1,031
Click to expand...

[B4X] Network + AsyncStreams + B4XSerializator

Attachments

  • B4A_Network.zip
    9.2 KB · Views: 7,090
  • B4A_NetworkOld.zip
    9.2 KB · Views: 3,605
  • B4J_Network.zip
    4.4 KB · Views: 4,233
  • B4i_Network.zip
    4.8 KB · Views: 2,661
Last edited:
Click to expand...

Android Text To Speech example

Android can synthesize and play text.
Using the TTS library you can easily add this feature to your application.



B4X: 
Sub Process_Globals...
 

Attachments

  • TTSExample.zip
    6.2 KB · Views: 31,820
  • TTS.apk
    69.8 KB · Views: 4,192
Click to expand...

[B4X] OkHttpUtils2 with Wait For


Downloading resources is simpler with the new Resumable Subs feature.

Using Wait For we can wait for the JobDone event in the same sub that started the download.
No...
 

Attachments

  • jOkHttpUtils2.b4xlib
    5.4 KB · Views: 208
  • OkHttpUtils2.b4xlib
    5.4 KB · Views: 218
  • iHttpUtils2.b4xlib
    5.4 KB · Views: 184
Last edited:
Click to expand...

Admob Mediation With Chartboost

Hello,

as @sorex requested, this is a short tutorial for mediation with admob for chartboost.

1) Register with chartboost. Add your app. Navigate to campaigns / Publishing . Click...
 
Last edited:
Click to expand...

ActionBar / Sliding Pages tutorial

Attachments

  • ActionBar.zip
    14.1 KB · Views: 7,808
Last edited:
Click to expand...

GUI AVD Manager / Emulator

B4A Sdk Manager v2 adds support for managing Android Virtual Devices (AVDs):



Before you start, make sure to...
 
Click to expand...

ELM327wifi Terminal

- working with OBD ELM 327 Wifi, ex. V-Link interface.
 

Attachments

  • ELM327wifi_terminal.zip
    15.1 KB · Views: 780
  • log2.txt
    1.1 KB · Views: 757
  • ATWS.jpg
    64.5 KB · Views: 939
  • ATPPS.jpg
    64.5 KB · Views: 864
  • ATMA.jpg
    81.1 KB · Views: 909
Click to expand...

Create PDF's on an Android devices & send them to a B4J app

Just a simple example. You can (of course do a lot more with it)

There are a lot of libs about creating pdf's. With Erel's example...
 

Attachments

  • PDFMAchineB4J.zip
    1.7 KB · Views: 731
  • PDFMAchineB4A.zip
    8.1 KB · Views: 931
Click to expand...

digital dashboard



Version sans CustomView

B4X: 
#Region  Project Attributes
    #ApplicationLabel: Digital_dashboard
    #VersionCode: 1
    #VersionName:
    #SupportedOrientations: landscape...
 

Attachments

  • RPMMeter.zip
    146.6 KB · Views: 775
Last edited:
Click to expand...
You must log in or register to post here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…