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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
Please post any technical question in this forum.
Libraries developers questions
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8.1K
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8.1K
Java Question
First mistake when recompiling an old project
Mar 2, 2026
Sergio Castellari
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A
I need b4a code to use BT setcommuniactiondevice / Clearcommunicationdevice , for Bluetooth MIC audio recording
abdulla
Sep 17, 2023
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2
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3K
Sep 17, 2023
abdulla
A
J
MyReceiver with NB6 error. MyReceiver_br (Solved)
jvrh_1
Sep 17, 2023
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2K
Sep 17, 2023
jvrh_1
J
trim()
EdsonZanatta
Sep 15, 2023
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3K
Sep 17, 2023
LucaMs
[b4x] ByRef or Not ByRef - THAT is the question.
MrKim
Sep 16, 2023
2
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25
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6K
Sep 17, 2023
b4x-de
how to add logo on MPEG cctv server
suciwulans
Sep 17, 2023
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1
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1K
Sep 17, 2023
Cableguy
C
b4j cannot open visual designer. says choose program to open fxml files.
cbal03
Sep 16, 2023
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3
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2K
Sep 17, 2023
bdunkleysmith
how to compile apk 64 bit
suciwulans
Aug 29, 2023
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11
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5K
Sep 17, 2023
suciwulans
load 2 layout by using root
ibra939
Sep 16, 2023
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2
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977
Sep 16, 2023
ibra939
"auto refresh" Android tablet
AKJammer
Sep 15, 2023
2
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21
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7K
Sep 16, 2023
AKJammer
F
Solved
[Solved] Main Activity_Pause(UserClosed) always shows UserClosed=False when back button is pressed.
Fernando Solá
Sep 16, 2023
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1
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2K
Sep 16, 2023
Fernando Solá
F
Solved
Register in database in mysql list type variable (Solved)
jose luis gudino
Sep 13, 2023
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3K
Sep 16, 2023
jose luis gudino
A
Solved
permission error in release mode only
akinnovation
Sep 14, 2023
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2K
Sep 15, 2023
akinnovation
A
C
Solved
CastException PrefencesDialog
Cosmo
Sep 13, 2023
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2K
Sep 15, 2023
Cosmo
C
Solution for the persistent "Target API 33 warning" from Google
fredo
Sep 13, 2023
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2K
Sep 14, 2023
asales
F
Solved
White Text on White Background in Messages
Frank Cazabon
Sep 14, 2023
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2K
Sep 14, 2023
Frank Cazabon
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Y
Measure text
ykucuk
Sep 12, 2023
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3K
Sep 14, 2023
Mahares
M
Blank screen before change to another activity
artsoft
Sep 13, 2023
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3K
Sep 14, 2023
LucaMs
D
#StartAtBoot: True not working
Duck
Sep 8, 2023
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8
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3K
Sep 14, 2023
Duck
D
Is there a posibility creating B4XLib file this straty
Theera
Sep 14, 2023
2
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26
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4K
Sep 14, 2023
LucaMs
[Solved] B4XTable Won't Show Loaded Data
Ronomega73
Sep 14, 2023
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1
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1K
Sep 14, 2023
Mahares
M
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