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Welcome to B4X forum!
B4X is a set of simple and powerful cross platform RAD tools:
B4A
(free) - Android development
B4J
(free) - Desktop and Server development
B4i
- iOS development
B4R
(free) - Arduino, ESP8266 and ESP32 development
All developers, with any skill level, are welcome to
join the B4X community
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B4A - Android
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Android Questions
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Libraries developers questions
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8.1K
Java Question
First mistake when recompiling an old project
Mar 2, 2026
Sergio Castellari
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How can I cast "java.util.map" to a B4A Map?
fredo
Aug 21, 2016
Answers
10
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6K
Sep 1, 2016
fredo
How to limit app to only phones without a permission?
JohnC
Aug 11, 2016
Answers
3
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1K
Sep 1, 2016
JohnC
D
Block phones or raspberry pi connected to my wifi hotspot
deantangNYP
Aug 19, 2016
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Sep 1, 2016
deantangNYP
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CustomView/TabStrip
Lee Ingram
Aug 30, 2016
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2K
Sep 1, 2016
Lee Ingram
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RDC problem
PrayudiPramono
Aug 29, 2016
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Sep 1, 2016
DonManfred
Net library conflicting with the Network library
NeoTechni
Aug 29, 2016
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7
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2K
Aug 31, 2016
NeoTechni
Y
communication from php page to b4a app?
yuval
Aug 31, 2016
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4
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1K
Aug 31, 2016
yuval
Y
php and b4a socket programing
ArminKH
May 25, 2015
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8
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4K
Aug 31, 2016
techknight
Decode Base64 eMail body?
William Hunter
Aug 28, 2016
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4
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4K
Aug 31, 2016
William Hunter
java.lang.NullPointerException: null receiver
peacemaker
Aug 30, 2016
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10
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10K
Aug 31, 2016
peacemaker
Simple question about recycle imageview
Douglas Farias
Aug 30, 2016
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3
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2K
Aug 31, 2016
Erel
Scroll text within Edit Text view
Rusty
Aug 31, 2016
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2K
Aug 31, 2016
Erel
D
CameraEX Zoom problem
Declan
Aug 31, 2016
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3K
Aug 31, 2016
Erel
K
OkHttp - How to get HTTP return code?
klarsys
Aug 31, 2016
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1
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1K
Aug 31, 2016
Erel
Seekbar with start and finish
moster67
Aug 31, 2016
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2K
Aug 31, 2016
moster67
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WalkieTalkie App and Server
gerredtor
Aug 31, 2016
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Aug 31, 2016
gerredtor
G
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Exit PreferenceActivity
EvgenyB4A
Aug 31, 2016
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1
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3K
Aug 31, 2016
Erel
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Map is not ready yet.
ykucuk
Aug 30, 2016
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2K
Aug 31, 2016
Erel
J
Help, i cant get my head around this
joolzg
Aug 30, 2016
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Aug 31, 2016
joolzg
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GooglePlayService troubles
marcick
Aug 31, 2016
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2K
Aug 31, 2016
marcick
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